Form 10-Q - Quarterly report [Sections 13 or 15(d)]

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q


			x			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2024


			o			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ___________ to ___________

Commission file number 1-38519

Serina Therapeutics, Inc.

(Exact name of registrant as specified in its charter)


Delaware						82-1436829
(State or other jurisdiction of incorporation or organization)						(I.R.S. Employer Identification No.)

601 Genome Way, Suite 2001

Huntsville, Alabama 35806

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (256) 327-9630

Title of each class

Trading Symbol

Name of exchange on which registered

Common Stock, par value $0.0001 per share

SER

NYSE American

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. x Yes o No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). x Yes o No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.


Large accelerated filer	o	Accelerated filer	o
Non-accelerated filer	x	Smaller reporting company	x
		Emerging growth company	x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided to Section 13(a) of the Exchange Act. x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). o Yes x No

The number of shares common stock outstanding as of November 7, 2024 was 8,891,976, par value $0.0001 per share.

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SERINA THERAPEUTICS, INC.

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			Page Number
Part I – FINANCIAL INFORMATION
	Item 1.	Financial Statements	6
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	43
	Item 4.	Controls and Procedures	43

Part II – OTHER INFORMATION
	Item 1.	Legal Proceedings	45
	Item 1A.	Risk Factors	45
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	45
	Item 3.	Default Upon Senior Securities	45
	Item 4.	Mine Safety Disclosures	45
	Item 5.	Other Information	46
	Item 6.	Exhibits	46

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Forward-Looking Statements

This Quarterly Report on Form 10-Q (“Report”) contains forward-looking statements that involve risks and uncertainties. We make such forward-looking statements pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and other federal securities laws. All statements other than statements of historical facts contained in this Report are forward-looking statements. In some cases, you can identify forward-looking statements by words such as “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will,” “would,” or the negative of these words or other comparable terminology.

Any forward-looking statements in this Report reflect our current views with respect to future events or to our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these forward-looking statements. Factors that may cause actual results to differ materially from current expectations include, among other things, those discussed in this Report under Item 1 of the Notes to Condensed Consolidated Financial Statements, under Risk Factors in this Report, those incorporated by reference in the section titled “Risk Factors" in our Current Report on Form 8-K filed with the Securities and Exchange Commission on April 1, 2024, and those listed under Part I, Item 1A. Risk Factors of our Annual Report on Form 10-K as filed with the Securities and Exchange Commission on March 22, 2024. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Except as required by law, we assume no obligation to update or revise these forward-looking statements for any reason, even if new information becomes available in the future.

The description or discussion, in this Report, of any contract or agreement is a summary only and is qualified in all respects by reference to the full text of the applicable contract or agreement.

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EXPLANATORY NOTE

On March 26, 2024, the Delaware corporation formerly known as “AgeX Therapeutics, Inc.” completed our previously announced merger transaction in accordance with the terms and conditions of the Agreement and Plan of Merger and Reorganization, dated as of August 29, 2023 (the “Merger Agreement”), by and among AgeX Therapeutics, Inc., a Delaware corporation (“AgeX”), Canaria Transaction Corporation, an Alabama corporation and a wholly owned subsidiary of AgeX (“Merger Sub”), and Serina Therapeutics, Inc., an Alabama corporation (“Legacy Serina”), pursuant to which Merger Sub merged with and into Legacy Serina, with Legacy Serina surviving the merger as a wholly owned subsidiary of AgeX (the “Merger”). Additionally, on March 26, 2024, AgeX changed its name from “AgeX Therapeutics, Inc.” to “Serina Therapeutics, Inc.” (the “Company”).

At the effective time of the Merger, each outstanding share of Legacy Serina capital stock (after giving effect to the automatic conversion of all shares of Legacy Serina preferred stock into shares of Legacy Serina common stock and excluding any shares held as treasury stock by Legacy Serina or held or owned by AgeX or any subsidiary of AgeX or Legacy Serina and any dissenting shares) was converted into the right to receive 0.97682654 shares of AgeX common stock, which resulted in the issuance by AgeX of an aggregate of 5,913,277 shares of AgeX common stock to the stockholders of Legacy Serina. In addition, AgeX assumed the Legacy Serina 2017 Stock Option Plan and each outstanding and unexercised option to purchase Legacy Serina common stock and each outstanding and unexercised warrant to purchase Legacy Serina capital stock were adjusted with such stock options and warrants henceforth representing the right to purchase a number of shares of our common stock equal to 0.97682654 multiplied by the number of shares of Legacy Serina common stock previously represented by such options and warrants.

The Merger was treated as a reverse recapitalization under U.S. generally accepted accounting principles. Legacy Serina is considered the accounting acquirer for financial reporting purposes. Immediately following the consummation of the Merger, AgeX changed its name to “Serina Therapeutics, Inc.” and the Company’s common stock, par value $0.0001 per share (“common stock”), began trading on the NYSE American under the symbol “SER.”

Following the consummation of the Merger, the business previously conducted by Legacy Serina became the business conducted by the Company, which is now a clinical-stage biotechnology company developing Legacy Serina’s drug product candidates. The Company’s headquarters are located in Huntsville, Alabama (Legacy Serina’s headquarters).

The foregoing descriptions of the Merger Agreement and the Amended Certificate do not constitute a complete summary of the terms of the Merger Agreement, the Merger Certificate or the Amended Certificate, and are qualified in their entirety by reference to the full text of the Merger Agreement and the Amended Certificate filed as Exhibits 2.1 and 3.1 to our Quarterly Report on Form 10-Q filed with the SEC on May 14, 2024.

Pre-Merger Closing Conditions

Reverse Stock Split

As a pre-merger closing condition, on March 14, 2024, AgeX effected a reverse stock split of its common stock at a ratio of 1 for 35.17 (the “Reverse Stock Split”) resulting in 2,500,000 shares of AgeX common stock being outstanding immediately upon the Reverse Stock Split. Except for the number of authorized but unissued shares of AgeX common stock, and except as may be otherwise stated in the notes to the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q, number of shares of AgeX common stock issued and outstanding, or issuable upon the exercise of options or warrants or upon conversion of convertible indebtedness, and AgeX common stock prices, shown in the consolidated financial statements and the notes thereto have been retroactively adjusted to reflect the effect of the Reverse Stock Split.

Warrant Dividends

On March 19, 2024, AgeX issued to each stockholder of record as of the close of business on March 18, 2024 (the “Warrant Dividend Record Date”) three warrants (each, a “Post-Merger Warrant”) for each five shares of AgeX common stock issued and outstanding held by a stockholder of record as of the Warrant Dividend Record Date. Each Post-Merger Warrant will be exercisable at an exercise price equal to $13.20 per warrant share (such exercise price reflecting the Reverse Stock Split) for (i) one share of our common stock and (ii) one warrant (each, an “Incentive Warrant”) and will expire on July 31, 2025. Each Incentive Warrant will be exercisable at an exercise price equal to $18.00 per warrant share

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(such exercise price reflecting the Reverse Stock Split) for one share of our common stock and will expire on the four-year anniversary of closing of the Merger.

Each Post-Merger Warrant was issued and each Incentive Warrant will be issued pursuant to the terms of the warrant agreement, dated as of March 19, 2024 (the “Warrant Agreement”), by and between the Company and Equiniti Trust Company, LLC, a New York limited liability company, as warrant agent. No fractional warrants were issued. The number of Post-Merger Warrants issued to a stockholder of record were rounded down to the nearest whole number if such holder was entitled to receive a fractional warrant.

Prior to the closing of the Merger, substantially all assets of AgeX (“Legacy Assets”), other than certain biological materials, were transferred to a recently formed subsidiary of AgeX, UniverXome Bioengineering, Inc. (“UniverXome”). In consideration of the transfer of such assets, UniverXome assumed (i) all indebtedness of AgeX issued to Juvenescence Limited ("Juvenescence"), and secured by the Legacy Assets, that had not been previously converted into AgeX Series A Preferred Stock or AgeX Series B Preferred Stock, and (ii) all other liabilities of AgeX in existence as of the effective time of the Merger (other than certain transaction expenses related to the Merger).

Side Letter with Juvenescence

Concurrently with the execution of the Merger Agreement, AgeX, Legacy Serina, and AgeX’s controlling stockholder Juvenescence entered into a Side Letter, which became effective immediately prior to the closing of the Merger. The Side Letter provides, among other things, that (i) effective immediately before the consummation of the Merger, Juvenescence will cancel all out of the money AgeX warrants held by Juvenescence; (ii) Juvenescence will exercise all Post-Merger Warrants it holds to provide the Company an additional $15 million in capital according to the following schedule: (x) at least one-third on or before May 31, 2024, (y) at least one-third on or before November 30, 2024, and (z) at least one-third on or before June 30, 2025; (iii) Juvenescence will not sell any shares of AgeX Series A Preferred Stock or AgeX Series B Preferred Stock and will take all actions necessary to convert all of such Preferred Stock into AgeX common stock before a Reverse Stock Split that will occur before the Merger; (iv) Juvenescence will release all security interests, guarantees, pledges, assignments and other forms of collateral that it may have in AgeX’s assets pursuant to the terms of Juvenescence loans to AgeX; and (v) Juvenescence will consent to a newly formed subsidiary of AgeX assuming AgeX’s obligations with respect to loan agreements and promissory notes governing loans payable to Juvenescence, including obligations for amounts currently owed and future advances of loan funds, and Juvenescence shall release AgeX from those loan obligations. As of September 30, 2024, Juvenescence was in compliance with its Side Letter covenants.

Since Legacy Serina was determined to be the accounting acquirer in connection with the Merger, for periods prior to the Merger, the condensed consolidated financial statements were prepared on a stand-alone basis for Legacy Serina and did not include the combined entities’ activity or financial position. Subsequent to the Merger, the condensed consolidated financial statements as of and for the three and nine months ended September 30, 2024, include the acquired business from March 27, 2024, through September 30, 2024, and assets and liabilities at their acquisition date fair value. Historical share and per share figures of Legacy Serina have been retroactively restated based on the exchange ratio of 0.97682654.

In this Report, unless the context indicates otherwise, the terms “Company,” “we,” “us,” and “our” refer to (i) Legacy Serina for periods prior to the effectiveness of the Merger and (ii) Serina Therapeutics, Inc. (as a consolidated company) for periods following the effectiveness of the Merger. Following the completion of the Merger, the business conducted by the Company became primarily the business conducted by Legacy Serina.

On June 6, 2024, Juvenescence exercised Post-Merger Warrants to purchase 377,865 shares of the Company’s common stock, at an exercise price of $13.20 per share, for a total purchase price of $5.0 million. In addition to the shares of common stock, upon exercise of the Post-Merger Warrants, Juvenescence also received Incentive Warrants to purchase 377,865 shares of common stock with an exercise price of $18.00 per share that expire on March 26, 2028. The Company intends to use the proceeds from this exercise for general corporate purposes.

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PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

SERINA THERAPEUTICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except par value amounts)


	September 30, 2024		December 31, 2023
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	3,185	$	7,619
Grant receivable	14		—
Prepaid expenses and other current assets	2,224		—
Total current assets	5,423		7,619

Restricted cash	50		—
Property and equipment, net	519		573
Right of use assets - operating leases	509		666
Right of use assets - finance leases	92		110
Intangible assets, net	509		—
Other long-term prepaid assets	333		—
TOTAL ASSETS	$	7,435	$	8,968

LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, AND STOCKHOLDERS’ DEFICIT
Current liabilities:
Accounts payable	$	1,695	$	580
Accrued expenses	1,159		583
Loans due to Juvenescence, net of debt issuance costs	10,462		—


Other current liabilities	198		250
Total current liabilities	13,514		1,413

Warrant liability	6,744		—
Loans due to Juvenescence, net of current portion	693		—
Convertible promissory notes, at fair value	—		2,983
Operating lease liabilities, net of current portion	312		461
Finance lease liabilities, net of current portion	—		1
TOTAL LIABILITIES	21,263		4,858

Commitments and contingencies (Note 11)

Redeemable convertible preferred stock:
Redeemable convertible preferred stock, $0.01 par value; 10,000 authorized; none and 3,438 issued and outstanding at September 30, 2024 and December 31, 2023, respectively; Liquidation preference of none and $36,982 at September 30, 2024 and December 31, 2023, respectively	—		36,404
Stockholders’ deficit:
Preferred stock, $0.0001 par value, 5,000 shares authorized; none issued and outstanding at September 30, 2024 and December 31, 2023, respectively;	—		—
Common stock, $0.0001 par value, 40,000 shares authorized; and 8,892 and 2,410 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively;	1		25
Additional paid-in capital	8,000		858
Accumulated deficit	(21,775)		(33,177)
Total Serina Therapeutics, Inc. stockholders’ deficit	(13,774)		(32,294)
Noncontrolling interest	(54)		—
Total stockholders’ deficit	(13,828)		(32,294)
TOTAL LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, AND STOCKHOLDERS’ DEFICIT	$	7,435	$	8,968

See accompanying notes to these condensed consolidated interim financial statements.

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SERINA THERAPEUTICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
REVENUES
Grant revenues	$	14	$	29	$	70	$	66
Total revenues	14		29		70		66

OPERATING EXPENSES
Research and development	2,415		603		5,115		1,481
General and administrative	2,911		889		6,454		1,955
Total operating expenses	5,326		1,492		11,569		3,436

Loss from operations	(5,312)		(1,463)		(11,499)		(3,370)

OTHER INCOME (EXPENSE), NET
Interest expense	(16)		(100)		(509)		(382)
Fair value inception adjustment on convertible promissory note	—		—		—		2,240
Change in fair value of convertible promissory notes	—		2,614		(7,017)		4,477
Change in fair value of warrants	6,669		596		10,385		1,059
Other income, net	42		105		185		194
Total other income, net	6,695		3,215		3,044		7,588

NET INCOME (LOSS)	1,383		1,752		(8,455)		4,218
Net loss attributable to noncontrolling interest	27		—		54		—

NET INCOME (LOSS) ATTRIBUTABLE TO SERINA THERAPEUTICS, INC.	$	1,410	$	1,752	$	(8,401)	$	4,218

NET EARNINGS (LOSS) PER COMMON SHARE:
BASIC	$	0.16	$	0.80	$	(1.24)	$	1.94
DILUTED	$	0.13	$	0.23	$	(1.24)	$	0.57

WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING:
BASIC	8,851		2,190		6,774		2,176
DILUTED	10,751		7,584		6,774		7,548

See accompanying notes to these condensed consolidated interim financial statements.

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SERINA THERAPEUTICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ DEFICIT

(in thousands)

(unaudited)


	Redeemable Preferred Stock			Common Stock			Additional Paid-In Capital						Total Stockholders’ Deficit
	Number of Shares	Amount		Number of Shares	Par Value				Accumulated Deficit		Noncontrolling Interest
BALANCE AT DECEMBER 31, 2023	3,438	$	36,404	2,410	$	25	$	858	$	(33,177)	—		$	(32,294)
Issuance of common stock upon exercise of stock options	—	—		64	1		3		—		—		4
Issuance of common stock upon conversion of preferred stock	(3,438)	(36,404)		3,438	35		36,369		—		—		36,404
Issuance of common stock upon conversion of AgeX-Serina Note	—	—		616	6		10,715		—		—		10,721
Cancellation of common stock upon consummation of Merger on March 26, 2024	—	—		(6,528)	(67)		(47,833)		37,179		—		(10,721)
Merger and issuance of common stock to Legacy Serina shareholders upon consummation of Merger on March 26, 2024	—	—		8,414	1		960		—		—		961
Deemed dividend from issuance of warrants	—	—		—	—		(1,125)		(17,376)		—		(18,501)
Stock-based compensation	—	—		—	—		53		—		—		53
Net loss	—	—		—	—		—		(15,015)		—		(15,015)
BALANCE AT MARCH 31, 2024	—	—		8,414	1		—		(28,389)		—		(28,388)
Issuance of common stock upon exercise of Post-Merger Warrants	—	—		378	—		6,360		—		—		6,360
Stock-based compensation	—	—		—	—		458		—		—		458
Transactions with noncontrolling interests	—	—		—	—		3				(3)		—
Net income (loss)	—	—		—	—		—		5,204		(27)		5,177
BALANCE AT JUNE 30, 2024	—	—		8,792	1		6,821		(23,185)		(30)		(16,393)
Issuance of common stock upon exercise of stock options	—	—		100	—		86		—		—		86
Stock-based compensation	—	—		—	—		1,096		—		—		1,096
Transactions with noncontrolling interests	—	—		—	—		(3)		—		3		—
Net income (loss)	—	—		—	—		—		1,410		(27)		1,383
BALANCE AT SEPTEMBER 30, 2024	—	$	—	8,892	$	1	$	8,000	$	(21,775)	$	(54)	$	(13,828)

SERINA THERAPEUTICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ DEFICIT

(in thousands)

(unaudited)


	Redeemable Preferred Stock			Common Stock				Additional Paid-In Capital				Total Stockholders’ Deficit
	Number of Shares		Amount	Number of Shares		Par Value				Accumulated Deficit
BALANCE AT DECEMBER 31, 2022	3,323		35,442	2,167		22		646		(38,446)		(37,778)
Stock-based compensation	—		—	—		—		2		—		2
Net income	—		—	—		—		—		1,658		1,658
BALANCE AT MARCH 31, 2023	3,323		35,442	2,167		22		648		(36,788)		(36,118)
Issuance of common stock upon exercise of stock options	—		—	15		—		1		—		1
Stock-based compensation	—		—	—		—		23		—		23
Net income	—		—	—		—				808		808
BALANCE AT JUNE 30, 2023	3,323		35,442	2,182	—	22	—	672	—	(35,980)	—	(35,286)
Issuance of common stock upon exercise of stock options	—		—	228		2		11		—		13
Issuance of common stock upon conversion of convertible notes	115		962	—		—		175		—		175

Net income	—		—	—		—		—		1,752		1,752
BALANCE AT SEPTEMBER 30, 2023	3,438	0	36,404	2,410	0	24	0	858		(34,228)	0	(33,346)

See accompanying notes to these condensed consolidated interim financial statements.

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SERINA THERAPEUTICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)


	Nine Months Ended September 30,
	2024		2023
OPERATING ACTIVITIES:
Net income (loss)	$	(8,455)	$	4,218

Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	138		84
Non-cash lease expense	174		139
Non-cash interest expense on convertible promissory note	163		382
Amortization of debt issuance costs	337		—
Stock-based compensation	1,607		25
Fair value inception adjustment on convertible promissory note	—		(2,240)
Change in fair value of convertible promissory notes	7,017		(4,477)
Change in fair value of warrants	(10,385)		(1,059)
Changes in operating assets and liabilities:
Grant receivable	51		—
Prepaid expenses and other current assets	(2,449)		2
Accounts payable	(712)		523
Accrued expenses	132		(62)
Operating lease liabilities	(166)		(132)


Net cash used in operating activities	(12,548)		(2,597)

INVESTING ACTIVITIES:
Purchase of equipment	(17)		(434)
Net cash used in investing activities	(17)		(434)

FINANCING ACTIVITIES:
Drawdown on loan facilities from Juvenescence	2,933		—
Cash and restricted cash acquired in connection with the Merger	337		—
Proceeds from the exercise of stock options	90		15
Proceeds from the exercise of Post-Merger Warrants by Juvenescence	4,988		—
Proceeds from the issuance of convertible promissory notes	—		10,100
Principal repayment on loan facilities to Juvenescence	(133)		—
Principal repayments on finance lease liabilities	(34)		(35)
Net cash provided by financing activities	8,181		10,080

NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	$	(4,384)	$	7,049

CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
At beginning of the period	$	7,619	$	532
At end of the period	$	3,235	$	7,581


SUPPLEMENTAL DISCLOSURES
Cash paid for interest	$	2	$	4
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING AND INVESTING ACTIVITIES:
Right of use asset acquired in exchange for operating lease liabilities	$	—	$	672
Issuance of common stock upon conversion of Preferred Stock	$	36,404	$	—
Issuance of common stock upon conversion of AgeX-Serina Note	$	10,721	$	—
Merger and issuance of common stock upon consummation of Merger on March 26, 2024	$	961	$	—
Deemed dividend from issuance of warrants	$	1,125	$	—

See accompanying notes to these condensed consolidated interim financial statements.

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SERINA THERAPEUTICS, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

(unaudited)

1. Organization, Business Overview and Liquidity

Serina Therapeutics, Inc. (“Serina” or the “Company”) was incorporated as AgeX Therapeutics, Inc. in January 2017 in the state of Delaware. On March 26, 2024, AgeX Therapeutics, Inc. (“AgeX”) completed a merger transaction in accordance with the terms and conditions of the Agreement and Plan of Merger and Reorganization, dated as of August 29, 2023 (the “Merger Agreement”), by and among AgeX, Canaria Transaction Corporation, an Alabama corporation and a wholly owned subsidiary of AgeX (“Merger Sub”), and Serina Therapeutics, Inc., an Alabama corporation (“Legacy Serina”), pursuant to which Merger Sub merged with and into Legacy Serina, with Legacy Serina surviving the merger as a wholly owned subsidiary of AgeX (the “Merger”). Additionally, on March 26, 2024, AgeX changed its name from “AgeX Therapeutics, Inc.” to “Serina Therapeutics, Inc.” (the “Company”).

At the effective time of the Merger, each outstanding share of Legacy Serina capital stock (after giving effect to the automatic conversion of all shares of Legacy Serina preferred stock into shares of Legacy Serina common stock and excluding any shares held as treasury stock by Legacy Serina or held or owned by AgeX or any subsidiary of AgeX or of Legacy Serina and any dissenting shares) was converted into the right to receive 0.97682654 shares of AgeX common stock, which resulted in AgeX issuing an aggregate of 5,913,277 shares of AgeX common stock to the stockholders of Legacy Serina. In addition, AgeX assumed the Legacy Serina 2017 Stock Option Plan, and each outstanding and unexercised option to purchase Legacy Serina common stock and each outstanding and unexercised warrant to purchase Legacy Serina capital stock was adjusted with such stock options and warrants henceforth representing the right to purchase a number of shares of Company common stock equal to 0.97682654 multiplied by the number of shares of Legacy Serina common stock previously represented by such options and warrants.

The Company is a clinical-stage biotechnology company developing a pipeline of wholly-owned drug product candidates to treat neurological diseases and pain. The Company’s POZ drug delivery technology is designed to enable certain existing drugs and novel drug candidates to be modified in a way that may provide an increase in efficacy and safety of the resulting polymeric drug conjugate. The Company’s proprietary POZ technology is based on a synthetic, water soluble, low viscosity polymer called poly(2-oxazoline). The Company’s POZ technology is engineered to provide greater control in drug loading and more precision in the rate of release of attached drugs delivered via subcutaneous injection.

The therapeutic agents in the Company’s product candidates are typically well-understood and marketed drugs that are effective but are limited by pharmacokinetic (PK) profiles that can include toxicity, side effects and short half-life. The Company believes that by using POZ technology, drugs with narrow therapeutic windows can be designed to maintain more desirable and stable levels in the blood. The Company believes that POZ technology can be applied to small molecules, proteins, antibody drug conjugates, and other classes of molecules.

Prior to the closing of the Merger, any assets of AgeX other than certain “Legacy Assets” were transferred into a recently formed subsidiary of AgeX, UniverXome Bioengineering, Inc. (“UniverXome”). UniverXome assumed (i) any outstanding indebtedness of AgeX to Juvenescence Limited (“Juvenescence”), which was secured by the assets contributed to UniverXome, (ii) most of the Company’s contracts with third parties, other than certain designated contracts and any contracts that were terminated before the Merger, and (iii) all other liabilities of the Company in existence as of the effective time of the Merger (other than certain transaction expenses related to the Merger).

Liquidity and Going Concern

In addition to general economic and capital market trends and conditions, the Company’s ability to raise sufficient additional capital to finance its operations from time to time will depend on a number of factors specific to the Company’s operations such as operating expenses and progress in out-licensing its technologies and development of its product candidates.

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The unavailability or inadequacy of financing to meet future capital needs could force the Company to modify, curtail, delay, or suspend some or all aspects of planned operations. Sales of additional equity securities could result in the dilution of the interests of its stockholders. The Company cannot assure that adequate financing will be available on favorable terms, if at all.

The Company recognized net loss of $8.5 million for the nine months ended September 30, 2024. The Company used $12.5 million in net cash from operating activities for the period ended September 30, 2024 and has historically incurred losses from operations and expects to continue to generate negative cash flows as the Company implements its business plan.

Management believes that its cash and cash equivalents of $3.2 million as of September 30, 2024, along with the $10 million of cash proceeds expected to be received from Juvenescence through the exercise of Juvenescence’s remaining Post-Merger Warrants as provided in a “Side Letter”, will be used to fund Company operations but are not expected to be sufficient to satisfy the Company’s anticipated operating and other funding requirements for the twelve months from the issuance of these condensed consolidated interim financial statements. See Note 7, Stockholders’ Equity/(Deficit) regarding the Post-Merger Warrants and Side Letter. Management has based its estimate of the funds needed to finance Company operations on assumptions that may prove to be wrong, and available capital resources could be exhausted sooner than expected. As such, there is substantial doubt about the Company’s ability to continue as a going concern.

The Company is subject to risks and uncertainties common to early-stage companies in the biotechnology industry, including, but not limited to, technical risks associated with the successful research, development and manufacturing of therapeutic candidates, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations, and the ability to secure additional capital to fund operations. Therapeutic drug candidates currently under development will require significant additional research and development efforts, including extensive preclinical and clinical testing and regulatory approval prior to commercialization. These efforts will require significant amounts of additional capital, adequate personnel, and infrastructure. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize revenue from product sales. The Company expects to largely rely on raising capital from equity investors for funding its operations. Some funding is expected to be obtained through licensing agreements or other arrangements with commercial entities.

As a result of recurring losses from operations and recurring negative cash flows from operations, there is substantial doubt regarding the Company’s ability to maintain liquidity sufficient to operate its business effectively. If sufficient capital is not available, the Company would be required to delay, limit, reduce, or terminate its product development or future commercialization efforts or grant rights to develop and market therapeutic candidates to other entities. There can be no assurance that the Company will be able to raise additional funds or that the terms and conditions of any future financings will be workable or acceptable to the Company or its shareholders. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classifications of liabilities that might be necessary should the Company be unable to continue as a going concern.

2. Basis of Presentation and Summary of Significant Accounting Policies

The unaudited condensed consolidated interim financial statements presented herein, and as discussed below, have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and the requirements of the Securities and Exchange Commission (“SEC”) for interim reporting. In accordance with those rules and regulations, certain information and footnote disclosures normally included in comprehensive consolidated financial statements have been condensed or omitted. The condensed consolidated balance sheet as of September 30, 2024 and the condensed consolidated statements of operations, condensed consolidated statements of redeemable convertible preferred stock and stockholders’ equity (deficit) for the three and nine months ended September 30, 2024, and 2023 and condensed consolidated statements of cash flows for the nine months ended September 30, 2024, and 2023 are unaudited. The condensed consolidated balance sheet as of December 31, 2023 was derived from the audited consolidated financial statements at that date but does not include all the information and footnotes required by U.S. GAAP. These condensed consolidated interim financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the years ended December 31, 2023 and 2022 attached as Exhibit 99.2 to the Company’s Current Report on Form 8-K filed on April 1, 2024.

The accompanying condensed consolidated interim financial statements, in the opinion of management, include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the Company’s financial

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condition and results of operations. The condensed consolidated results of operations are not necessarily indicative of the results to be expected for any other interim period or for the entire year.

Principles of consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries in which the Company has a controlling financial interest. For consolidated entities where the Company has less than 100% of ownership, the Company records net loss attributable to noncontrolling interest on the consolidated statement of operations equal to the percentage of the ownership interest retained in such entities by the respective noncontrolling parties. The noncontrolling interest is reflected as a separate element of stockholders’ equity (deficit) on the Company’s consolidated balance sheets. Any material intercompany transactions and balances have been eliminated upon consolidation.

The Company assesses whether it is the primary beneficiary of a variable interest entity (“VIE”) at the inception of the arrangement and at each reporting date. This assessment is based on its power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the Company’s obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. If the entity is within the scope of the variable interest model and meets the definition of a VIE, the Company considers whether it must consolidate the VIE or provide additional disclosures regarding its involvement with the VIE. If the Company determines that it is the primary beneficiary of the VIE, the Company will consolidate the VIE. This analysis is performed at the initial investment in the entity or upon any reconsideration event. For entities the Company holds as an equity investment that are not consolidated under the VIE model, the Company will consider whether its investment constitutes a controlling financial interest in the entity and therefore should be considered for consolidation under the voting interest model.

The Company has five subsidiaries: Legacy Serina and UniverXome, which are wholly-owned subsidiaries, and ReCyte Therapeutics, Inc. (“ReCyte”), Reverse Bioengineering, Inc. (“Reverse Bio”), and NeuroAirmid Therapeutics, Inc. (“NeuroAirmid”). Following the Merger, the Company is primarily focused on developing Legacy Serina’s product candidates which are described elsewhere in this Report. Prior to the Merger, on March 26, 2024, pursuant to the Merger Agreement, the Company contributed all of its stock in Reverse Bio and ReCyte, along with substantially all of the assets (other than the stock of NeuroAirmid) of the Company to UniverXome. In exchange for the contribution of those assets, UniverXome assumed certain liabilities, including all of the Company’s indebtedness to Juvenescence. UniverXome owns 94.8% of the outstanding capital stock of ReCyte. ReCyte owns certain pre-clinical research and development assets involving stem cell-derived endothelial and cardiovascular related progenitor cells for the treatment of vascular disorders and ischemic conditions. The Company owns 100% of the outstanding capital of Reverse Bio through UniverXome. Reverse Bio owns assets involved in partial cellular reprogramming using its iTR™ technology with the intent to revert aged or diseased cells to a healthy and functional state. NeuroAirmid is jointly owned by the Company and certain researchers from the University of California and was organized to pursue certain cell therapies, focusing initially on Huntington’s Disease. The Company owns 47.5% of the outstanding capital stock of NeuroAirmid. The Company consolidates NeuroAirmid despite not having majority ownership interest as it has the ability to influence decision making and financial results through contractual rights and obligations as per Accounting Standards Codification (“ASC”) 810, Consolidation. On March 27, 2024, the Board of Directors of the Company formed a special committee for the purpose of exploring strategic alternatives for the business, assets and/or stock of UniverXome, Reverse Bio, ReCyte and NeuroAirmid.

Financial Statement Reclassification

Certain account balances from prior periods have been reclassified in these condensed consolidated financial statements to conform to current period classifications. Accounts payable and accrued expenses, previously presented as one line item on the condensed consolidated balance sheet, are now presented separately given the materiality of the balances. The current portion of operating and finance lease liabilities were also reclassified to other current liabilities. Additionally, the Non-cash interest expense on convertible promissory note, previously combined with accrued expenses in the operating activities section of the condensed consolidated statement of cash flows, is now presented separately within operating activities. These reclassifications had no effect on the reported results of operations or financial position.

Use of estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect (i) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and (ii) the reported amounts of revenues and expenses during the reporting period, in each case with consideration given to materiality. Significant estimates and assumptions

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which are subject to significant judgment include those related to going concern assessment of consolidated financial statements, useful lives associated with long-lived assets, including evaluation of asset impairment, allowances for uncollectible accounts receivables, loss contingencies, deferred income taxes and tax reserves, including valuation allowances related to deferred income taxes, determining the fair value of the Company’s embedded derivatives in the convertible notes payable and receivable, and assumptions used to value stock-based awards or other equity instruments and liability classified warrants. Actual results could differ materially from those estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.

Concentration of credit risk and other risks and uncertainties

Financial instruments that potentially subject the Company to concentrations of risk consist principally of cash equivalents. The Company maintains its cash deposits in Federal Deposit Insurance Corporation (“FDIC”) insured financial institutions and may at times hold investments at Securities Investor Protection Corporation (“SIPC”) insured broker-dealers.

At times, the balances in these accounts may be in excess of FDIC and SIPC insured limits. At September 30, 2024 and December 31, 2023, cash and cash equivalents deposits in excess of FDIC limits were $0.9 million and zero, respectively, and investments and deposits in excess of SIPC limits were $1.3 million and $7.3 million, respectively.

Product candidates developed by the Company and its subsidiaries will require approvals or clearances from the United States Food and Drug Administration (“FDA”) or foreign regulatory agencies prior to commercial sales. There can be no assurance that any of the product candidates being developed or planned to be developed by the Company or its subsidiaries will receive any of the required approvals or clearances. If regulatory approval or clearance were to be denied or any such approval or clearance was to be delayed, it would have a material adverse impact on the Company.

Fair value measurements of financial instruments

The Company has adopted ASC Topic 820, Fair Value Measurement, for certain financial instruments measured as fair value on a recurring basis. ASC Topic 820 defines fair value, establishes a framework for measuring fair value in accordance with accounting principles generally accepted in the United States, and expands disclosures about fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC Topic 820 establishes a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value.

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements).

The three levels of inputs that may be used to measure fair value are as follows:

•Level 1: Quoted prices in active markets for identical assets or liabilities.

•Level 2: Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets with insufficient volume or infrequent transactions (less active markets), or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated with observable market data for substantially the full term of the assets or liabilities. Level 2 inputs also include non-binding market consensus prices that can be corroborated with observable market data, as well as quoted prices that were adjusted for security-specific restrictions.

•Level 3: Unobservable inputs to the valuation methodology are significant to the measurement of the fair value of assets or liabilities. Level 3 inputs also include non-binding market consensus prices or non-binding broker quotes that we were unable to corroborate with observable market data.

Accounting for warrants

The Company determines the accounting classification of warrants it issues, as either liability or equity, by first assessing whether the warrants meet liability classification in accordance with ASC 480-10, Accounting for Certain Financial Instruments with Characteristics of both Liabilities and Equity, then in accordance with ASC 815-40, Accounting for Derivative Financial Instruments Indexed to, and Potentially Settled in, a Company’s Own Stock. Under ASC 480, warrants are considered liability classified if the warrants are mandatorily redeemable, obligate the Company to settle the

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warrants or the underlying shares by paying cash or other assets, or warrants that must or may require settlement by issuing a variable number of shares. If warrants do not meet liability classification under ASC 480-10, the Company assesses the requirements under ASC 815-40, which states that contracts that require or may require the issuer to settle the contract for cash are liabilities recorded at fair value, irrespective of the likelihood of the transaction occurring that triggers the net cash settlement feature. If the warrants do not require liability classification under ASC 815-40, and in order to conclude equity classification, the Company also assesses whether the warrants are indexed to its common stock and whether the warrants are classified as equity under ASC 815-40 or other applicable U.S. GAAP. After all relevant assessments, the Company concludes whether the warrants are classified as liability or equity. Liability classified warrants require fair value accounting at issuance and subsequent to initial issuance with all changes in fair value after the issuance date recorded in the consolidated statements of operations. Equity classified warrants only require fair value accounting at issuance with no changes recognized subsequent to the issuance date. See Notes 5, Related Party Transactions and 6, Fair Value Measurements, for additional information regarding warrants.

Redeemable convertible preferred stock

The Company recorded redeemable convertible preferred stock at fair value upon issuance, net of any issuance costs. As of December 31, 2023, the Company's preferred stock that was redeemable in circumstances not within the Company’s control was classified outside of permanent equity. The redeemable preferred stock was converted into common stock on March 26, 2024 upon consummation of the Merger.

Cash, cash equivalents, and restricted cash

A reconciliation of the Company’s cash and cash equivalents in the condensed consolidated balance sheets to cash, cash equivalents and restricted cash in the condensed consolidated statements of cash flows for all periods presented is as follows (in thousands):


	September 30, 2024		December 31, 2023
Cash and cash equivalents	$	3,185	$	7,619
Restricted cash (1)	50		—
Cash, cash equivalents, and restricted cash as shown in the condensed consolidated statements of cash flows	$	3,235	$	7,619

(1)Restricted cash entirely represents the deposit required to maintain the Company’s corporate credit card program.

Property and equipment, net

Property and equipment are carried at cost less accumulated depreciation. The costs of additions and betterments are capitalized and expenditures for repairs and maintenance are expensed as incurred. When items of property and equipment are sold or retired, the related costs and accumulated depreciation are removed from the accounts and any gain or loss is included in the consolidated statements of operations. Depreciation of property and equipment is provided utilizing the straight-line method over the range of lives used of the respective assets, which is 3 - 10 years.

Leases

The Company determines if an arrangement is a lease at inception. Leases are classified as either financing or operating, with classification affecting the pattern of expense recognition in the consolidated statements of operations. The Company recognizes right-of-use (“ROU”) assets and lease liabilities for leases with terms greater than twelve months in the consolidated balance sheet.

ROU assets represent an entity’s right to use an underlying asset during the lease term and lease liabilities represent an entity’s obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. If the lease agreement does not provide an implicit rate in the contract, the lessee uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. For such purposes, the lease term applied may include options to

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extend or terminate the lease when it is reasonably certain that the Company or a subsidiary will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term.

The Company has elected to combine lease and non-lease components as a single component. Operating leases are recognized on the consolidated balance sheet as ROU lease assets, current lease liabilities, and non-current lease liabilities. Fixed rents are included in the calculation of the lease balances, while variable costs paid for certain operating and pass through costs are excluded. Lease expense is recognized over the expected term on a straight-line basis.

Intangible assets, net

Intangible assets, consisting primarily of acquired in-process research and development (“IPR&D”) with alternative future use and patents, are stated at acquired cost, less accumulated amortization. Amortization expense is computed using the straight-line method over the estimated useful life of 10 years. See Note 3, Selected Balance Sheet Components.

Impairment of long-lived assets

The Company assesses the impairment of long-lived assets whenever events or changes in circumstances indicate that such assets might be impaired and the carrying value may not be recoverable. If events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable and the expected undiscounted future cash flows attributable to the asset are less than the carrying amount of the asset, an impairment loss, equal to the excess of the carrying value of the asset over its fair value, is recorded. There has been no impairment of long-lived assets for the accounting periods presented.

Grant revenues

The Company receives government grants that reimburse the Company for certain allowable costs for funded projects. Grant revenue is recognized in the condensed consolidated statement of operations on a systematic basis over the period in which the Company recognizes qualified research and development costs that grant is intended to compensate and there is reasonable assurance that the Company will meet the terms and conditions of the grant.

The Company accounts for grants received to perform research and development services in accordance with ASC 730-20, Research and Development Arrangements. At the inception of the grant, we perform an assessment as to whether the grant is a liability or a contract to perform research and development services for others. If the Company or a subsidiary receiving the grant is obligated to repay the grant funds to the grantor regardless of the outcome of the research and development activities, then the Company is required to estimate and recognize that liability. Alternatively, if the Company or a subsidiary receiving the grant is not required to repay, or if it is required to repay the grant funds only if the research and development activities are successful, then the grant agreement is accounted for as a contract to perform research and development services for others, in which case, grant revenue is recognized when the related research and development expenses are incurred.

In applying the provisions of Topic 606, the Company has determined that government grants are out of the scope of Topic 606 because the government entities do not meet the definition of a “customer”, as defined by Topic 606, as there is not considered to be a transfer of control of good or services to the government entities funding the grant. In the absence of applicable guidance under U.S. GAAP, our policy is to recognize grant revenue when the related costs are incurred, provided that the applicable conditions under the government contracts have been met. Only costs that are allowable under the grant award, certain government regulations and the National Institutes of Health’s supplemental policy and procedure manual may be claimed for reimbursement, and the reimbursements are subject to routine audits from governmental agencies from time to time. Costs incurred are recorded in research and development expenses on the accompanying condensed consolidated statements of operations.

The Company believes the recognition of revenue as costs are incurred and amounts become realizable is analogous to the concept of transfer of control of a service over time under ASC 606.

Grant revenues for the three and nine months ended September 30, 2024 and 2023 were not material.

Research and development

Research and development costs are expensed as they are incurred and include compensation for scientists, support personnel, outside contracted services, and material costs associated with product development. The Company continually

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evaluates new product opportunities and engages in intensive research and product development efforts. Research and development expenses include both direct costs tied to a specific contract or grant, and indirect costs. Research and development expenses incurred and reimbursed by grants from third parties or governmental agencies, if any and as applicable, approximate the respective revenues recognized in the condensed consolidated statements of operations.

General and administrative

General and administrative expenses consist primarily of compensation and related benefits, including stock-based compensation, for executive and corporate personnel, and professional and consulting fees.

Income taxes

Income taxes are provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred taxes related primarily to differences between the basis of loss carryovers and depreciation differences for financial and income tax reporting. Deferred taxes represent the future tax return consequences of those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which the differences are expected to be recovered or settled.

The Company only recognizes tax benefits from an uncertain tax position if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate resolution. To date, the Company has not recognized such tax benefits in its financial statements.

Stock-based Compensation Expense

The Company recognizes compensation expense related to employee option grants and restricted stock grants, if any, in accordance with ASC 718, Compensation – Stock Compensation (“ASC 718”). Forfeitures are accounted for as they occur.

The Company uses the Black-Scholes option pricing model for estimating the fair value of options granted under its equity award plans, including the 2024 Inducement Plan, 2024 Incentive Plan, 2017 Option Plan, and 2017 Incentive Plan. The fair value of each restricted stock grant, if any, is determined based on the value of the common stock granted or sold. The Company has elected to treat stock-based payment awards with time-based service conditions as a single award and recognizes stock-based compensation on a straight-line basis over the requisite service period.

Compensation expense for non-employee stock-based awards is recognized in accordance with ASC 718. Stock option awards issued to non-employees, principally consultants or outside contractors, as applicable, are accounted for at fair value using the Black-Scholes option pricing model. Management believes that the fair value of the stock options and restricted stock units can more reliably be measured than the fair value of services received. The Company records compensation expense based on the then-current fair values of the stock options and restricted stock units at the grant date. Compensation expense for non-employee grants is recorded on a straight-line basis in the condensed consolidated statements of operations.

Basic and diluted net earnings (loss) per share attributable to common stockholders

Basic earnings (loss) per share (“EPS”) of common stock is computed by dividing net income (loss) available to common stockholders (numerator) by the weighted average number of shares of common stock outstanding (denominator) during the period.

Diluted EPS gives effect to all dilutive potential common shares outstanding during the period using the treasury stock method for stock options and warrants and the if-converted method for redeemable convertible preferred stock and convertible promissory notes. In computing diluted EPS, the average stock price for the period is used to determine the number of shares assumed to be purchased from the exercise of stock options and/or warrants. Diluted EPS excluded all dilutive potential shares if their effect is anti-dilutive.

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Segment reporting

Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker, the Chief Executive Officer, in making decisions regarding resource allocation and assessing performance. The Company views its operations and manages its business as one operating segment in the United States of America.

Recently adopted accounting pronouncements

In November 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. The expanded annual disclosures are effective for our year ending December 31, 2024, and the expanded interim disclosures are effective in 2025 and will be applied retrospectively to all prior periods presented. Early adoption is permitted. The Company is currently assessing the impact of the guidance on its consolidated financial statements and disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to income Tax Disclosures, under which entities must consistently categorize and provide greater disaggregation of information in the rate reconciliation. They must also further disaggregate income taxes paid. ASU 2023-09 enhances annual income tax disclosures to address investor requests for more information about the tax risks and opportunities present in an entity’s worldwide operations. The Company adopted this standard as of January 1, 2024, and it did not have a material impact on the condensed consolidated financial statements.

Recently Issued Accounting Pronouncements Not Yet Adopted

In March 2024, the FASB issued ASU 2024-02, Codification Improvements—Amendments to Remove References to the Concepts Statements. ASU 2024-02 removes various references to the FASB’s Concepts Statements from the FASB’s Accounting Standards Codification (Codification or GAAP). The Concepts Statements are non-authoritative guidance issued by the FASB that provide the objectives, qualitative characteristics and other concepts that govern the development of accounting principles by the FASB. The ASU indicates that the goal of the amendments is to simplify the Codification and distinguish between nonauthoritative and authoritative guidance (since, unlike the Codification, the concepts statements are nonauthoritative). This ASU is effective for the Company beginning January 1, 2025 and is not expected to have a material impact on the condensed consolidated financial statements.

3. Selected Balance Sheet Components

Prepaid expenses and other current assets

Prepaid expenses and other current assets was as follows (in thousands):


	September 30, 2024		December 31, 2023
Prepaid technology access fee	$	1,334	$	—
Prepaid insurance	375		—
Other prepaid expenses	372		—
Other current assets	143		—
Total prepaid expenses and other current assets	$	2,224	$	—

Property and equipment, net

Property and equipment at September 30, 2024 and December 31, 2023 net of accumulated depreciation expense was as follows (in thousands):

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	September 30, 2024		December 31, 2023
Computer equipment	$	31	$	30
Equipment	853		837
Software	96		96
Total property and equipment	980		963
Less accumulated depreciation	(461)		(390)
Total property and equipment, net	$	519	$	573

Depreciation expense for the three and nine months ended September 30, 2024 and 2023 was immaterial.

Intangible assets, net

At September 30, 2024, intangible assets, primarily consisting of acquired IPR&D with alternative use and patents, and accumulated amortization were as follows (in thousands):


	September 30, 2024
Intangible assets	$	576
Accumulated amortization	(67)
Total intangible assets, net	$	509

The Company recognized immaterial amortization expense of intangible assets, included in research and development expenses, for the three and nine months ended September 30, 2024. The Company did not have intangible assets prior to the Merger which consummated on March 26, 2024.

Amortization of intangible assets for periods subsequent to September 30, 2024 is as follows (in thousands):


Year Ending December 31,	Amortization Expense
2024	$	33
2025	131
2026	131
2027	131
Thereafter	83
Total	$	509

Accrued liabilities

At September 30, 2024 and December 31, 2023, accrued liabilities were comprised of the following (in thousands):


	September 30, 2024		December 31, 2023
Accrued severance	$	606	$	—
Accrued interest on convertible promissory notes	—		558
Accrued compensation	201		13
Other accrued expenses	352		12
Total accrued expenses	$	1,159	$	583

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4. Related Party Transactions

Convertible Notes Agreement and Asset Contribution Agreement

On March 26, 2024, AgeX entered into an Asset Contribution Agreement with UniverXome (the “Asset Contribution Agreement”) pursuant to which AgeX transferred to UniverXome all of AgeX’s capital stock in Reverse Bio and ReCyte, along with certain patents, patent applications, and other intellectual property, certain biological materials, certain trademarks and service marks, certain equipment, certain inventory, and certain files and records relating to the foregoing, and UniverXome assumed all of the Liabilities (as defined in the Asset Contribution Agreement) in existence as the Effective Time (as defined in the Merger Agreement) other than the Transaction Expenses (as defined in the Merger Agreement) and certain other liabilities. Concurrently with the execution of the Asset Contribution Agreement, AgeX, and its subsidiaries UniverXome, Reverse Bio, and ReCyte (the “Subsidiary Obligors”), entered into an Agreement with Respect to the Convertible Notes (the “Convertible Notes Agreement”) with Juvenescence.

Pursuant to the Convertible Notes Agreement, AgeX transferred to UniverXome, and UniverXome assumed, all of AgeX’s rights and obligations under the 2022 Secured Note and 2023 Secured Note and related Security Agreements described below. Juvenescence agreed to release AgeX from its obligations under (i) the 2022 Secured Note and the 2023 Secured Note (collectively, the “Convertible Notes”), together with (ii) all agreements evidencing or securing the Convertible Notes, including the related Security Agreements, and UniverXome assumed all of AgeX’s obligations under the Convertible Notes and related agreements, including the Security Agreements. As a result, (i) Juvenescence agreed to look solely to UniverXome, and ReCyte and Reverse Bio as guarantors, for any and all obligations, including repayment, under the Convertible Notes, the Security Agreements, and related documents, and (ii) Juvenescence released its security interests in the assets of AgeX and certain subsidiaries, including its security interests in the stock of UniverXome, the stock and assets of Merger Sub, the stock and assets of NeuroAirmid, and certain cGMP embryonic cell lines used to support the NeuroAirmid business, and any security interest that it might have in the stock and assets of Merger Sub and Legacy Serina, while retaining its security interest in the stock and assets of ReCyte and Reverse Bio and in AgeX assets transferred to UniverXome. Juvenescence also agreed to provide the Company with a claims reserve for the purpose of settling and paying the costs associated with certain claims and demands against the Company, which claims reserve will be an additional debt obligation of UniverXome.

The Convertible Notes Agreement amended certain provisions of the 2022 Secured Note and 2023 Secured Note to eliminate (i) the provisions permitting Juvenescence and AgeX to convert outstanding amounts owed into shares of AgeX common stock, and (ii) certain related provisions.

The Convertible Notes Agreement includes a mechanism for adjusting the amount outstanding under the 2022 Secured Note as necessary for AgeX to have had $0.5 million of immediately spendable non-restricted cash net of all payables and other liabilities as of the closing of the Merger to meet the closing condition under the Merger Agreement.

Indebtedness Exchange Agreement and Issuance of AgeX Preferred Stock

During July 2023, AgeX and Juvenescence entered into an Exchange Agreement pursuant to which AgeX issued shares of Series A Preferred Stock and Series B Preferred Stock to Juvenescence in exchange for the extinguishment of a total of $36.0 million of indebtedness under a Secured Convertible Facility Agreement (the “2020 Loan Agreement”), the 2022 Secured Note, and the 2023 Secured Note discussed below. The Series A Preferred Stock and Series B Preferred Stock automatically converted into shares of AgeX common stock on February 1, 2024.

2022 Secured Note

The following summary of the 2022 Secured Note is qualified by the terms of the Convertible Notes Agreement which substitutes UniverXome for AgeX as the “borrower” and primary obligor pursuant to the 2022 Secured Note and the Security Agreement described below, and which amends certain provisions of the 2022 Secured Note.

On February 14, 2022, AgeX and Juvenescence entered into a Secured Convertible Promissory Note (the “2022 Secured Note”) pursuant to which Juvenescence agreed to provide to AgeX a $13.2 million line of credit for a period of 12 months. The Company drew an initial $8.2 million of the line of credit and used $7.2 million to refinance the outstanding principal and the loan origination fees under a prior loan agreement with Juvenescence. On February 9, 2023, AgeX and Juvenescence entered into an Amended and Restated Secured Convertible Promissory Note which amends and restates the 2022 Secured Note and added $2.0 million to the line of credit available to be borrowed by AgeX, under the 2022 Secured

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Note subject to Juvenescence’s discretion to approve each loan draw. On May 9, 2023, AgeX and Juvenescence entered into an Allonge and Second Amendment to Amended and Restated Convertible Promissory Note (the “Second Amendment”) that increased the amount of the line of credit available to AgeX by $4.0 million, subject to the terms of the 2022 Secured Note and Juvenescence’s discretion to approve and fund each of AgeX’s future draws of that additional amount of credit. On June 2, 2023, AgeX and Juvenescence entered into a Third Amendment to Amended and Restated Convertible Promissory Note (the “Third Amendment’), which provided that (i) AgeX could draw on the available portion of the line of credit under the 2022 Secured Note until the earlier of the date a Qualified Offering as defined in the 2022 Secured Note is consummated by AgeX or October 31, 2023 (subject to Juvenescence’s discretion to approve each loan draw as provided in the 2022 Secured Note), (ii) AgeX would not be obligated to issue additional common stock purchase warrants to Juvenescence in connection with the receipt of loan funds made available pursuant to the Second Amendment, and (iii) the definition of “Reverse Financing Condition” was amended to extend to June 20, 2023 the referenced deadline for fulfillment of the condition to permit borrowing or other incurrence of indebtedness by Reverse Bio.

On July 31, 2023, AgeX and Juvenescence entered into a Fourth Amendment (the “Fourth Amendment”) to the 2022 Secured Note, which provided that (i) the definition of Reverse Financing Condition was amended to extend to October 31, 2023 the referenced deadline for fulfillment of the condition to permit borrowing or other incurrence of indebtedness by Reverse Bio, and (ii) certain aspects of the loan conversion provisions of the 2022 Secured Note were amended. On November 9, 2023, AgeX and Juvenescence entered into the Allonge and Fifth Amendment to Amended and Restated Convertible Promissory Note (the “Fifth Amendment”) that increased the amount of the line of credit available to AgeX by $4.4 million, subject to the terms of the 2022 Secured Note and Juvenescence’s discretion to approve and fund each of AgeX’s future draws of that additional amount of credit. Concurrently with the execution of the Fifth Amendment, AgeX also entered into an additional Pledge Agreement to add shares of a subsidiary to the collateral under the Security Agreement, and AgeX’s subsidiaries ReCyte, Reverse Bio, and UniverXome each entered into a Guaranty Agreement and Joinder Agreement pursuant to which each of them agreed to guaranty AgeX’s obligations to Juvenescence pursuant to the 2022 Secured Note, as amended by the Fifth Amendment, and to grant Juvenescence a security interest in their respective assets pursuant to the Security Agreement to secure their obligations to Juvenescence.

On February 9, 2024, AgeX and Juvenescence executed a Sixth Amendment to Amended and Restated Convertible Promissory Note (the “Sixth Amendment”) that extended to May 9, 2024 the “Repayment Date” on which the outstanding principal balance and accrued loan origination fees will become due and payable pursuant to the 2022 Secured Note.

On March 26, 2024, AgeX entered into an Allonge and Seventh Amendment to the Amended and Restated Convertible Promissory Note (the “Seventh Amendment”) that provided the Company an additional $2.4 million of credit subject to the terms of the 2022 Secured Note which was drawn entirely on March 29, 2024.

On May 8, 2024, the Company entered into an Allonge and Eighth Amendment to the Amended and Restated Convertible Promissory Note that extended to December 31, 2024 the “Repayment Date” on which the outstanding principal balance and accrued loan origination fees will become due and payable pursuant to the 2022 Secured Note and provided the Company an additional $0.5 million of credit subject to the terms of the 2022 Secured Note which was drawn entirely on May 9, 2024. The funds were used to pay certain litigation settlement expenses and related litigation costs.

From January 1 through September 30, 2024, AgeX drew in the aggregate $6.3 million of its credit available under the 2022 Secured Note with Juvenescence. As of September 30, 2024, AgeX had borrowed a total of $26.5 million under the 2022 Secured Note, of which $7.5 million was borrowed during the year ended December 31, 2023. During July 2023, $18.0 million of 2022 Secured Note indebtedness, comprised of $16.7 million borrowing and $1.3 million of accrued loan origination fees, was extinguished in exchange for shares of AgeX Series A Preferred Stock and Series B Preferred Stock pursuant to the Exchange Agreement between AgeX and Juvenescence.

As an arrangement fee for the 2022 Secured Note, AgeX agreed to pay Juvenescence an origination fee in an amount equal to 4% of the amount of each draw of loan funds, which will accrue as each draw is funded, and an additional 4% of all the total amount of funds drawn that will accrue following the end of the period during which funds may be drawn from the line of credit. The origination fee will become due and payable on the repayment date or in a pro rata amount with any prepayment of in whole or in part of the outstanding principal balance of the 2022 Secured Note.

2022 Warrants – Upon each drawdown of funds under the 2022 Secured Note prior to June 2, 2023 when the Third Amendment went into effect, AgeX issued to Juvenescence warrants to purchase shares of AgeX common stock (“2022 Warrants”). The 2022 Warrants are governed by the terms of a Warrant Agreement between AgeX and Juvenescence. The number of 2022 Warrants issued with respect to each draw of loan funds was equal to 50% of the number determined by

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dividing the amount of the applicable loan draw by the applicable Market Price. The Market Price was the last closing price per share of AgeX common stock on the NYSE American preceding the delivery of the notice from AgeX requesting the draw of funds that triggered the obligation to issue 2022 Warrants.

As of December 31, 2023, AgeX had issued to Juvenescence 2022 Warrants to purchase a total of 294,482 shares of AgeX common stock, of which 2022 Warrants to purchase 53,980 shares of AgeX common stock were issued during the year ended December 31, 2023. The exercise prices of the 2022 Warrants issued through December 31, 2023 ranged from $20.75 per share to $30.94 per share representing the market closing price of AgeX common stock on the NYSE American on the one day prior to delivery of the drawdown notices. However, 2022 Warrants to purchase a total of 164,889 shares of AgeX common stock were cancelled pursuant to the Merger Agreement and the remaining 2022 Warrants to purchase a total of 129,593 shares of common stock at prices ranging from $20.75 to $25.01 remain in effect. The number of shares issuable upon exercise of the 2022 Warrants and the exercise price per share are subject to adjustment upon the occurrence of certain events such as a stock split or reverse split or combination of the common stock, stock dividend, recapitalization or reclassification of the common stock, and similar events, and have been adjusted to give effect to the a 1 for 35.17 reverse stock split that AgeX implemented on March 14, 2024. See Note 7, Stockholders’ Equity/(Deficit). The 2022 Warrants will expire at 5:00 p.m. New York time three years after the date of issue. The expiration dates range from June 5, 2025 to April 3, 2026.

Conversion of Loan Amounts to Common Stock – The 2022 Secured Note included provisions allowing AgeX or Juvenescence to convert the loan balance and any accrued but unpaid origination fee into AgeX common stock; however, those provisions were eliminated from the 2022 Note pursuant to the Convertible Notes Agreement.

Default Provisions – The loan agreement also includes customary events of default, including but not limited to the nonpayment of principal or interest, violations of covenants, material adverse changes, attachment, levy, restraint on business, cross-defaults on material indebtedness, bankruptcy, delisting, material judgments, misrepresentations, governmental approvals, and disposal of material assets. Upon an event of default, the outstanding loan balance and origination fees may become immediately due and payable prior to the mandatory repayment date.

2023 Secured Note

The following summary of the 2023 Secured Note is qualified by the terms of the Convertible Notes Agreement which substitutes UniverXome for AgeX as the “borrower” and primary obligor pursuant to the 2023 Secured Note and the Security Agreement described below, and which amends certain provisions of the 2023 Secured Note.

On March 13, 2023, AgeX and Juvenescence entered into a $10.0 million Secured Convertible Promissory Note (the “2023 Secured Note”) pursuant to which Juvenescence loaned to AgeX $10.0 million. AgeX used the loan proceeds to finance a $10.0 million loan to Legacy Serina which was converted into Legacy Serina common stock in connection with the Merger.

On July 31, 2023, AgeX and Juvenescence entered into an amendment to the 2023 Secured Note that mirrors the amendments of the 2022 Secured Note pursuant to the Fourth Amendment of the 2022 Secured Note described above and also modified certain aspects of the conversion provisions of the 2023 Secured Note. The outstanding principal balance of the 2023 Secured Note was scheduled to become due and payable on March 13, 2026. In lieu of accrued interest, AgeX agreed to pay Juvenescence an origination fee in an amount equal to 7% of the loan funds disbursed to AgeX, which will accrue in two installments. The origination fee will become due and payable on the earliest to occur of (i) repayment of the 2023 Secured Note in whole or in part (provided that the origination fee shall be prorated for the amount of any partial repayment) and (ii) the acceleration of the maturity date of the 2023 Secured Note following an Event of Default as defined in the 2023 Secured Note.

During July 2023, the 2023 Secured Note indebtedness, plus a portion of the accrued loan origination fees, was exchanged for shares of AgeX Series B Preferred Stock pursuant to the Exchange Agreement.

The 2023 Secured Note included provisions allowing AgeX or Juvenescence to convert the loan balance and any accrued but unpaid origination fee into the Company common stock; however, those provisions were eliminated from the 2023 Note pursuant to the Convertible Notes Agreement.

The 2023 Secured Note includes certain covenants that among other matters require financial reporting and impose certain restrictions on UniverXome that are substantially the same as those under the 2022 Secured Note.

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Security Agreement

AgeX entered into a Security Agreement on February 14, 2022 in favor of Juvenescence as the secured party in connection with the 2022 Secured Note, and subsequently an Amended and Restated Security Agreement that amended the February 14, 2022 Security Agreement and added the 2023 Secured Note to the obligations secured by the Security Agreement. The Security Agreement, as so amended, granted Juvenescence a security interest in substantially all of the assets of AgeX, including a security interest in shares of AgeX subsidiaries that hold certain assets, as collateral for AgeX’s loan obligations. Pursuant to the Convertible Notes Agreement, UniverXome assumed AgeX’s obligations under the Security Agreement and Juvenescence released its security interests in the assets of AgeX and certain subsidiaries, including its security interests in the stock of UniverXome, the stock and assets of Merger Sub, the stock and assets of NeuroAirmid, and certain cGMP embryonic cell lines used to support the NeuroAirmid business, and any security interest that it might have in the stock and assets of Merger Sub and Legacy Serina, while retaining its security interest in the stock and assets of ReCyte and Reverse Bio and in AgeX assets transferred to UniverXome. If an Event of Default occurs under the 2022 Note, the 2023 Note or the Security Agreement, Juvenescence will have the right to foreclose on the assets pledged as collateral.

Debt Issuance Costs

The following table summarizes the debt balances net of unamortized deferred debt issuance costs by loan agreement as of September 30, 2024 (in thousands):


	Principal		Origination Fee		Total Debt		Unamortized Debt Issuance Costs		Total Debt, Net
Current
2022 Secured Note	$	9,692	$	778	$	10,470	$	(8)	$	10,462
Non-current
2023 Secured Note	—		693		693		—		693
Total debt, net	$	9,692	$	1,471	$	11,163	$	(8)	$	11,155

Indemnification Agreements

On March 13, 2023, AgeX executed that certain Letter of Indemnification in Lieu of or Supplemental to a Medallion Signature Guarantee (“Letter of Indemnification”), pursuant to which AgeX agreed to indemnify American Stock Transfer & Trust Company, LLC and its affiliates, successors and assigns (the “AST Indemnity”) from and against any and all claims, damages, liabilities or losses arising out of the transfer of all of the AgeX common stock held by Juvenescence to its wholly-owned subsidiary, Juvenescence US Corp. (the “Share Transfer”). In connection with AgeX’s execution of the Letter of Indemnification, AgeX and Juvenescence entered into that certain Transfer of Shares of AgeX Therapeutics, Inc. Common Stock – Indemnification Agreement, pursuant to which Juvenescence agreed to indemnify AgeX against any and all claims, damages, liabilities or losses arising out of the Share Transfer or AST Indemnity.

On December 21, 2023, AgeX executed that certain Letter of Indemnification in Lieu of or Supplemental to a Medallion Signature Guarantee (the “ETC Letter of Indemnification”), pursuant to which AgeX agreed to indemnify Equiniti Trust Company LLC and its affiliates, successors and assigns (the “ETC Indemnity”) from and against any and all claims, damages, liabilities or losses arising out of the transfer 467,657 shares of AgeX common stock held by Juvenescence US Corp. to JuvVentures (the “JUV US Share Transfer”). In connection with AgeX’s execution of the ETC Letter of Indemnification, AgeX, Juvenescence, the ultimate parent company of Juvenescence US Corp. and JuvVentures, entered into that certain Transfer of Shares of AgeX Therapeutics, Inc. Common Stock – Indemnification Agreement, pursuant to which Juvenescence agreed to indemnify AgeX against any and all claims, damages, liabilities or losses arising out of the JUV US Share Transfer or ETC Indemnity.

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6. Fair Value Measurements

The Company had the following liabilities measured at fair value on a recurring basis (in thousands):


	Balance at September 30, 2024		Level 1		Level 2		Level 3
Liabilities:
Warrant liability	$	6,744	$	—	$	—	$	6,744
Total	$	6,744	$	—	$	—	$	6,744


	Balance at December 31, 2023		Level 1		Level 2		Level 3
Liabilities:
Convertible promissory notes	$	2,983	$	—	$	—	$	2,983
Total	$	2,983	$	—	$	—	$	2,983

Convertible Promissory Notes

AgeX-Serina Note

On March 15, 2023, Legacy Serina issued a Convertible Promissory Note (the “AgeX-Serina Note”) in the amount of $10.0 million to AgeX. The AgeX-Serina Note bore interest at 7% per annum and was scheduled to mature on March 15, 2026. Serina borrowed the $10.0 million pursuant to the AgeX-Serina Note to provide for general working capital needs. The AgeX-Serina Note was converted into shares of Legacy Serina common stock by AgeX in connection with the Merger.

Serina evaluated the AgeX-Serina Note in accordance with ASC 815, Derivatives and Hedging, and determined it contains certain variable share settlement features tied to the price of a future financing which were not considered clearly and closely related to the host instrument. These provisions included automatic conversion upon the event of a Qualified Financing, the Holder’s option to convert the AgeX-Serina Note upon a Non-Qualified Financing, and the Holder’s option to convert or request repayment upon sale of Serina. The AgeX-Serina Note also contained a Change in Control Put and a Default Put which were not clearly and closely related to the host instrument. Serina elected to initially and subsequently measure the AgeX-Serina Note in its entirety at fair value, with changes in fair value recognized in earnings. The fair value inception date adjustment on the instrument is recorded as a component of other income in Serina’s condensed consolidated statements of operations.

On March 15, 2023, the fair value of the $10.0 million principal amount under the AgeX-Serina Note was evaluated and an adjustment to reduce the fair value of the principal balance to $7.8 million was recorded at that time. The change in fair value recognized during the three months ended September 30, 2024 and 2023 amounted to zero and $2.2 million gain, respectively. The change in fair value recognized during the nine months ended September 30, 2024 and 2023 amounted to $7.0 million loss and a $3.9 million gain, respectively.

Legacy Serina Convertible Notes

From September 2022 through February 2023, Legacy Serina issued interest-bearing Convertible Promissory Notes (the “Legacy Serina Convertible Notes”) to various investors in the principal amount of $1.5 million. The Legacy Serina Convertible Notes bore interest at 6% per annum and were scheduled to become due and payable by Legacy Serina two years from the respective issuance dates. The Legacy Serina Convertible Notes provided that upon a Qualified Equity Financing event in which Serina sells shares of Preferred Stock for aggregate proceeds of at least $15.0 million, the principal and outstanding interest on the Legacy Serina Convertible Notes would automatically convert into shares of Legacy Serina’s Preferred Stock issued in the Qualified Financing at a conversion price of the lesser of (i) a 20% discount to the price paid by purchasers in the Qualified Financing and (ii) the quotient resulted from dividing $100 million by the fully diluted capitalization of Legacy Serina immediately prior to the Qualified Financing. If Serina were to enter into a Non-Qualified Equity Financing (less than $15 million in proceeds), the holders of the Legacy Serina Convertible notes would have had the option to convert the Legacy Serina Convertible Notes into shares of Serina’s Preferred Stock issued in the Non-Qualified Financing at the price paid per share. Serina had the right to optionally convert the Legacy Serina Convertible Notes into Legacy Serina Series A-5 Preferred Stock at a price of $13.31 per share, and a warrant to purchase

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shares of Legacy Serina Series A-5 Preferred Stock with an exercise price of $20.47, and an expiration date of December 31, 2024. If a Change in Control or an IPO were to occur prior to a Qualified Financing, then the holders of Legacy Serina Convertible Notes would have had the option to convert outstanding principal and interest into common stock at a price per share equal to an amount obtained by dividing (i) the Post-Money Valuation Cap ($100,000,000) by (ii) the Fully Diluted Capitalization, as such terms were defined in the Legacy Serina Convertible Notes, immediately prior to the conversion. Upon a change in control, the Legacy Serina Convertible Note holders were entitled to require Legacy Serina to repay the outstanding principal and accrued but unpaid interest in cash.

Serina evaluated the Legacy Serina Convertible Notes in accordance with ASC Topic 815, Derivatives and Hedging, and determined they contained certain variable share settlement features tied to the price of a future financing which were not considered clearly and closely related to the host instruments. These provisions included mandatory conversion upon the event of a Qualified Financing and the holder’s option to convert the Legacy Serina Convertible Notes upon a Non-Qualified Financing. The Legacy Serina Convertible Notes also contained a Change in Control Put and a Default Put which were not clearly and closely related to the host instrument. Serina elected to initially and subsequently measure the Legacy Serina Convertible Notes in their entirety at fair value, with changes in fair value recognized in earnings. The fair value inception date adjustment on the instrument is recorded as a component of other income in Serina’s condensed consolidated statements of operations. The change in fair value of the instrument since inception date is recorded on a separate line item as a component of other income in Serina’s condensed consolidated statements of operations.

On July 26, 2023, all of the Legacy Serina Convertible Notes were converted into 115,171 shares of Legacy Serina Series A-5 Preferred Stock. As provided for in the note agreements, the holders of the Legacy Serina Convertible Notes also received warrants to purchase an additional 115,171 shares of Legacy Serina Series A-5 Preferred Stock. See Note 7, Stockholders’ Equity/(Deficit) for discussion of Legacy Serina warrants assumed by the Company upon consummation of the Merger on March 26, 2024. The change in fair value for the three and nine months ended September 30, 2023 was losses of $0.4 million and $0.6 million, respectively.

The following is a reconciliation of the beginning and ending balances for the AgeX-Serina Note and the Legacy Serina Convertible Notes liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the nine months ended September 30, 2024 and 2023 (in thousands):


	AgeX-Serina Note		Serina Convertible Notes
Balance as of December 31, 2023	$	2,983	$	—
Notes converted into common stock	(10,000)		—
Change in fair value	7,017		—
Balance as of September 30, 2024	$	—	$	—


	AgeX-Serina Note		Serina Convertible Notes
Balance as of December 31, 2022	$	—	$	1,617
Convertible debt issuance	10,000		100
Inception adjustment	(2,240)		—
Notes converted to Series A-5 pref. stock	—		(963)
Notes converted to warrants	—		(175)
Change in fair value	(3,898)		(579)
Balance as of September 30, 2023	$	3,862	$	—

Warrant Liability

The Company classifies the Post-Merger Warrants and the Incentive Warrants (collectively, the “Merger Warrants”) as liabilities. At the end of each reporting period, changes in fair value during the period are recognized as a component of other income (expense), net within the consolidated statements of operations. The change in fair value of these warrant liabilities recognized during the three months period ended September 30, 2024 and 2023 amounted to $6.7 million and

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$0.6 million gain, respectively. The change in fair value recognized during the nine months period ended September 30, 2024 and 2023 amounted to $10.4 million and $1.1 million gain. The Company will continue adjusting the warrant liability for changes in fair value until the earlier of a) the exercise or expiration of the warrants or b) the redemption of the warrants, at which time the warrants will be reclassified to additional paid-in capital. On June 6, 2024, Juvenescence exercised Post-Merger Warrants to purchase 377,865 shares of the Company’s common stock at an exercise price of $13.20 per share, for a total purchase price of $5.0 million. In addition to the shares of common stock, upon exercise of the Post-Merger Warrants, Juvenescence also received Incentive Warrants to purchase 377,865 shares of common stock with an exercise price of $18.00 per share that expire on March 26, 2028. As of September 30, 2024, Juvenescence held 755,728 Post-Merger Warrants and 377,865 Incentive Warrants.

Prior to the Merger, the Company classified certain of the Assumed Warrants as liabilities. Upon consummation of the Merger, all Assumed Warrants were adjusted such that after the Merger each such Assumed Warrant represents the right to purchase a number of shares of Company common stock equal to 0.97682654 multiplied by the number of shares of Legacy Serina common stock issuable upon the exercise of such Assumed Warrant prior to the Merger. The Assumed Warrants have an exercise price of $20.47 per share and expire on December 31, 2024.

The following is a reconciliation of the beginning and ending balances of warrant liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the nine months ended September 30, 2024 and 2023 (in thousands):


	Merger Warrants		Assumed Warrants
Balance as of December 31, 2023	$	—	$	—
Fair value at inception	18,501		—
Exercise	(1,372)		—
Change in fair value	(10,385)		—
Balance as of September 30, 2024	$	6,744	$	—

Balance as of December 31, 2022	$	—	$	1,077
Change in fair value	—		(1,059)
Balance as of September 30, 2023	$	—	$	18

The Company estimates the fair value of warrants using the Black-Scholes-Merton option pricing model with the following assumptions at the reporting date:


	September 30, 2024		September 30, 2023
Expected volatility	99.15% -123.57%		97.0% - 99%
Expected term (in years)	0.8 – 3.49		0.30 - 0.8
Risk-free interest rate	3.58% - 4.45%		5.09% - 5.55%
Expected dividend yield	0.00	%	0.00	%

Expected volatility for the periods post Merger consummation on March 26, 2024 is based on historical volatility of the Company, while pre Merger periods use the historical volatility of comparable public entities as an estimate. The Company estimates the expected term using time to expiration of the warrant. The risk-free interest rate is the yield on a U.S. Treasury zero-coupon issue with a remaining term equal to or approximating the expected term of the warrant.

See Note 7, Stockholders’ Equity/(Deficit) for further details regarding the Merger Warrants and the Assumed Warrants.

7. Stockholders’ Equity/(Deficit)

Redeemable Convertible Preferred Stock

All Legacy Serena redeemable convertible preferred stock was converted into common stock as described in Note 1.

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The table below presents Legacy Serina redeemable convertible preferred stock information adjusted for the 0.97682654 Exchange Ratio as of December 31, 2023 (in thousands other than per share price).


Preference Order	Designation	Shares Designated	Shares Issued and Outstanding	Issue Price per Share		Carrying Value		Liquidation Preference
#1	Series A Preferred Stock	391	391	$	5.12	$	2,000	$	2,002
#2	Series A-1 Preferred Stock	293	293	6.82		$	1,998	$	1,998
#3	Series A-2 Preferred Stock	1,091	1,091	10.17		$	11,085	$	11,095
#4	Series A-3 Preferred Stock	487	487	12.80		$	6,240	$	6,234
#5	Series A-4 Preferred Stock	702	702	13.31		$	9,347	$	9,344
#6	Series A-5 Preferred Stock	1,954	474	13.31		$	5,734	$	6,309
		4,918	3,438			$	36,404	$	36,982

Common Stock

The holders of the Company’s common stock are entitled to receive ratably dividends when, as, and if declared by the Board of Directors out of funds legally available. Upon liquidation, dissolution, or winding up, the holders of Company common stock are entitled to receive ratably the net assets available after the payment of all debts and other liabilities and subject to the prior rights of the Company outstanding preferred shares, if any.

The holders of common stock are entitled to one vote for each share held on all matters submitted to a vote of the Company stockholders. The holders of common stock have no preemptive, subscription, or redemption rights. The outstanding shares of common stock are fully paid and non-assessable.

Warrants

Merger Warrants

On March 19, 2024, the Company issued to each holder of AgeX common stock as of the dividend record date, March 18, 2024, three warrants (“Post-Merger Warrants”) for each five shares of AgeX common stock held by such stockholder. Each Post-Merger Warrant is exercisable for one “Unit” at a price equal to $13.20 per Unit and will expire on July 31, 2025. Each Unit will consist of (i) one share of Company common stock and (ii) one warrant (“Incentive Warrant”). Each Incentive Warrant is exercisable for one share of Company common stock at a price equal to $18.00 per warrant and will expire on the four-year anniversary of the closing date of the Merger. As of September 30, 2024 there were 1,122,419 Post-Merger Warrants issued and outstanding. The Company classifies the Post-Merger Warrants and the Incentive Warrants as liabilities. See Note 6, Fair Value Measurements, regarding accounting for warrant liabilities.

The Side Letter provides, among other things, that Juvenescence will exercise all Post-Merger Warrants it holds to provide the Company an additional $15.0 million in capital according to the following schedule: (x) at least one-third on or before May 31, 2024, (y) at least one-third on or before November 30, 2024, and (z) at least one-third on or before June 30, 2025. Juvenescence received 1,133,593 Post-Merger Warrants. On June 6, 2024, Juvenescence exercised Post-Merger Warrants to purchase 377,865 shares of the Company’s common stock at an exercise price of $13.20 per share, for a total purchase price of $5.0 million. In addition to the shares of common stock, upon exercise of the Post-Merger Warrants, Juvenescence also received Incentive Warrants to purchase 377,865 shares of common stock with an exercise price of $18.00 per share that expire on March 26, 2028. As of September 30, 2024, Juvenescence held 755,728 Post-Merger Warrants and 377,865 Incentive Warrants.

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Details of Merger Warrant activity for the nine months ended September 30, 2024 are as follows:


	Post-Merger Warrants	Incentive Warrants
Balance at December 31, 2023	-	-
Warrants issued	1,500	378
Warrants exercised	(378)	-
Warrants outstanding at September 30, 2024	1,122	378

Assumed Warrants

Upon consummation of the Merger, the Company assumed the outstanding, unexercised warrants to purchase Legacy Serina capital stock (the “Assumed Warrants”), which were adjusted such that after the Merger each such Assumed Warrant represents the right to purchase a number of shares of Company common stock equal to 0.97682654 multiplied by the number of shares of Legacy Serina common stock issuable upon the exercise of such Assumed Warrant prior to the Merger. There were 473,681 Assumed Warrants issued and outstanding as of September 30, 2024 with an exercise price of $20.47 per share and that expire on December 31, 2024.

Of the Assumed Warrants, 358,511 warrants which were granted prior to 2021 contain both put and call options. The Company may call the warrants at any time following the date the warrants become exercisable. These warrants are accordingly accounted for as a liability and remeasured to fair value at each reporting period. The 115,170 warrants with a fair value of $0.2 million were accounted for as equity as they were issued in connection with the conversion of promissory notes to equity during 2023. See Note 6, Fair Value Measurements, regarding accounting for warrant liabilities.

Former AgeX Warrants

As of September 30, 2024, there are 129,593 warrants issued and outstanding with exercise prices ranging from $20.75 to $25.01 and expiration dates ranging from June 5, 2025 to April 3, 2026. These warrants were issued in connection with drawdowns of loan funds by AgeX from Juvenescence under the 2022 Secured Note and were equity classified. On March 26, 2024, as per the terms of the Side Letter executed concurrently with the Merger Agreement on August 29, 2023, all “out of the money” AgeX warrants were canceled. The number of shares of common stock issuable upon exercise of the remaining “in the money warrants” and the exercise prices of those warrants were adjusted for the reverse stock split ratio of 1 for 35.17.

8. Stock-Based Awards

Equity Incentive Plan Awards

Serina 2024 Inducement Equity Plan

On August 15, 2024, the Company’s Board of Directors adopted the 2024 Inducement Equity Plan, (the “2024 Inducement Plan”). Under the 2024 Inducement Plan, the Company has reserved 1,000,000 shares of common stock for the grant to new employees or non-employee directors of stock options or the sale of restricted stock or for the settlement of restricted stock units which are hypothetical units issued with reference to common stock (“RSUs”). The Company may also grant stock appreciation rights (“SARs”) under the Inducement Plan. The Plan also permits the Company to issue such other securities as its Board of Directors or the Compensation Committee administering the Inducement Plan may determine. As of September 30, 2024, no options were granted from the plan. Options under this plan primarily have a ten-year life, vest and therefore become exercisable in periodic installments as determined by the Board or Committee or based upon the attainment of a Performance Goal or the occurrence of a specified event. The vesting provisions of individual options may vary.

Serina 2024 Equity Incentive Plan

On March 27, 2024, the Company’s Board of Directors adopted the 2024 Equity Incentive Plan, (the “2024 Incentive Plan”). Under the 2024 Incentive Plan, the Company has reserved 1,725,000 shares of common stock for the grant to employees, directors, and consultants of stock options or SARs, or the sale of restricted stock or for the settlement of RSUs. The 2024 Incentive Plan also permits the Company to issue such other securities as its Board of Directors or the

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Compensation Committee administering the Incentive Plan may determine. Options under this plan primarily have a ten-year life, vest and therefore become exercisable in periodic installments as determined by the Board or Committee or based upon the attainment of a Performance Goal or the occurrence of a specified event. The vesting provisions of individual options may vary. As of September 30, 2024, options to purchase 1,652,792 shares of the Company common stock were outstanding under the 2024 Incentive Plan, which options have an exercise prices ranging from $6.66 to $14.87 per share and expire on dates ranging from March 2034 to September 2034. As of September 30, 2024, zero stock options under the 2024 Incentive Plan had been exercised.

Serina 2017 Stock Option Plan

In 2017, the Legacy Serina’s Board of Directors adopted the Serina Therapeutics, Inc. 2017 Stock Option Plan (the “2017 Option Plan”) that provides for the granting of stock options to employees. Pursuant to the Merger Agreement, the Company assumed the outstanding stock options granted by Legacy Serina under the 2017 Option Plan. The options were adjusted such that after the Merger each such option granted and outstanding under the 2017 Option Plan represents the right to purchase a number of shares of Company common stock equal to 0.97682654 multiplied by the number of shares of Legacy Serina common stock issuable upon the exercise of such options granted and outstanding under the 2017 Option Plan prior to the Merger. As of September 30, 2024, options to purchase 1,551,411 shares of Company common stock were outstanding under the 2017 Option Plan, which options have an exercise price of $0.06 and expire on dates ranging from October 2024 to December 2032. As of September 30, 2024, 164,693 stock options under the 2017 Option Plan had been exercised. Pursuant to the Merger Agreement, no further options shall be granted under the 2017 Option Plan.

Serina 2017 Equity Incentive Plan

Under the Serina 2017 Equity Incentive Plan, as amended (the “2017 Incentive Plan” formerly AgeX 2017 Equity Incentive Plan), the Company has reserved 241,683 shares of common stock for the grant of stock options or the sale of Restricted Stock or for the settlement of RSUs. Pursuant to the Merger Agreement, all “out of the money” options (meaning those options with an exercise price equal to or greater than $0.7751 on a pre-reverse stock split basis) were canceled and no further options shall be granted under the 2017 Incentive Plan. The “in the money” stock options were adjusted for the reverse stock split ratio of 1 for 35.17. As of September 30, 2024, there were 11,359 stock options granted and outstanding with exercise prices ranging from $13.19 to $25.96 per share and expiration dates ranging from November 2024 to January 2034. As of September 30, 2024, no stock options under the 2017 Incentive Plan had been exercised.

A summary of Serina stock option activity under all plans and related information are as follows (in thousands, except weighted average exercise price):


	Number of Options Outstanding	Weighted- Average Exercise Price (per share)
Balance at December 31, 2023	1,716	$0.06
Assumption of options in connection with the Merger	12	$24.04
Granted	1,653	$9.16
Exercised	(164)	$0.06
Cancelled/Forfeited	(1)	$26.48
Balance at September 30, 2024	3,216	$4.82
Options exercisable at September 30, 2024	1,598	$0.49

Stock-based Compensation Expense

During the nine months ended September 30, 2024, the Company granted stock options to purchase 1,652,792 shares of common stock to certain employees and consultants under the 2024 Incentive Plan, with a weighted average grant date fair value of $7.95 per share. Total unrecognized compensation cost related to unvested stock option grants of $11.5 million as of September 30, 2024 is expected to be recognized over weighted average period of 1.8 years.

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Stock-based compensation expense has been allocated to operating expenses as follows (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Research and development	$	210	$	—	$	343	$	—
General and administrative	886		—		1,264		25
Total stock-based compensation expense	$	1,096	$	—	$	1,607	$	25

The fair value of each option award is estimated on the date of grant using a Black-Scholes option pricing model applying the weighted-average assumptions including the market price of the underlying common stock, expected option life, risk-free interest rates, volatility, and dividend yield. The assumptions that were used to calculate the grant date fair value of employee and non-employee stock option grants for the three and nine months ended September 30, 2024 were as follows:


	Three Months Ended September 30,		Nine Months Ended September 30,
	2024(1)	2023(2)	2024(1)	2023(2)


Expected life (in years)	5.9 - 6.1	—	5.0 - 6.1	—
Volatility	117.91% - 118.33%	—	113.08% - 118.33%	—
Risk-free interest rates	3.54% - 4.14%	—	3.54% - 4.65%	—
Dividend yield	—	—	—	—

(1)Relates to stock options granted under the Serina 2024 Equity Incentive Plan during the period.

(2)There were no stock options granted during the period.

The Company does not recognize deferred income taxes for incentive stock option compensation expense and records a tax deduction only when a disqualified disposition has occurred.

9. Profit Sharing Plan

Through its wholly owned subsidiary Legacy Serina, the Company has established a 401(k) profit sharing plan (the “PSP”) for all eligible employees of the Company. The PSP provides for eligible employee contributions subject to certain annual Internal Revenue Code limits. For participants who are age 50 or older during any calendar year, additional employee contributions are allowed under the PSP, subject to Internal Revenue Code limits.

Employer contributions, if any, may include matching contributions and profit sharing contributions, both of which are made on a discretionary basis and are subject to service and employment requirements. Employer matching contributions and employer profit sharing contributions vest based on a graded vesting schedule. The Company made no discretionary employer matching or employer profit sharing contributions for the three and nine months ended September 30, 2024 and 2023.

10. Income Taxes

The provision for income taxes for interim periods is determined using an estimated annual effective tax rate in accordance with ASC 740-270, Income Taxes, Interim Reporting. The effective tax rate may be subject to fluctuations during the year as new information is obtained, which may affect the assumptions used to estimate the annual effective tax rate, including factors such as valuation allowances against deferred tax assets, the recognition or de-recognition of tax benefits related to uncertain tax positions, if any, and changes in or the interpretation of tax laws in jurisdictions where the Company conducts business.

Due to losses incurred for all periods presented, the Company did not record a provision or benefit for income taxes. A valuation allowance is provided when it is more likely than not that some portion of the deferred tax assets will not be realized. The Company established a full valuation allowance for all of its deferred tax assets for all periods presented due to the uncertainty of realizing future tax benefits from its net operating loss carryforwards and other deferred tax assets.

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The Company reports income tax related interest and penalties within its provision for income tax in its condensed consolidated statements of operations. Similarly, the Company reports the reversal of income tax-related interest and penalties within its provision for income tax line item to the extent the Company resolves its liabilities for uncertain tax positions in a manner favorable to its accruals therefor, during the nine months ended September 30, 2024 and 2023, the Company did not record unrecognized tax benefits.

11. Commitments and Contingencies

Facilities and Equipment Lease Agreements

The Company leases its lab and office facilities in Huntsville, Alabama for various terms under long-term, non-cancelable operating lease agreements. The leases expire on various dates from October 2025 through January 2028 and provide for renewal periods of two years. For the office lease, the Company has elected not to apply the recognition requirements under ASC 842, as the lease cost, if recognized under ASC 842, would not be materially different from the straight-line basis over the lease term.

The Company also leases laboratory equipment under a long-term, non-cancelable operating lease which expired in September 2024 and was subsequently replaced by a month-to-month cancellable agreement.

The Company also leases two pieces of equipment for various terms under long-term, non-cancelable finance lease agreements. One of the two finance leases expired in September 2024 with ownership passed on to the Company in accordance with the original term of the lease agreement, while the other finance lease expires in February 2025.

Supplemental cash flow information related to leases is as follows (in thousands):


	Nine Months Ended September 30,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	166	$	132
Operating cash flows from finance leases	$	2	$	4
Financing cash flows from finance leases	$	34	$	35
Right-of-use assets obtained in exchange for lease obligations
Operating leases	$	—	$	672
Finance leases	$	—	$	—

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Supplemental balance sheet information related to leases was as follows (in thousands other than weighted average remaining lease term and discount rates):


	September 30, 2024			December 31, 2023
Operating lease
Right-of-use assets	$	862		$	862
Accumulated Amortization	(353)			(196)
Right-of-use asset, net	$	509		$	666

Right-of-use lease liability, current	$	197		$	214
Right-of-use lease liability, noncurrent	312			461
Total operating lease liabilities	$	509		$	675

Finance leases
Right-of-use assets	$	163		$	163
Accumulated Amortization	(71)			(53)
Right-of-use asset, net	$	92		$	110

Right-of-use lease liability, current	$	1		$	36
Right-of-use lease liability, noncurrent	—			1
Total finance lease liabilities	$	1		$	37

Weighted average remaining lease term
Operating lease	2.78 years			3.32 years
Finance leases	0.42 years			0.64 years

Weighted average discount rate
Operating lease	6.67		%	6.67		%
Finance leases	6.67		%	11.9		%

The following is a maturity analysis of the annual undiscounted cash flows of the operating lease liabilities as of September 30, 2024 (in thousands):


	Operating Leases
Three months ending December 31, 2024	$	56
Year ending December 31, 2025	217
Year ending December 31, 2026	159
Year ending December 31, 2027	117
Thereafter	10
Total undiscounted lease payments	559
Less: imputed interest	(50)
Total lease obligations	509
Less: current portion	(197)
Long-term lease obligations	$	312

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Litigation – General

The Company is subject to various claims and contingencies in the ordinary course of its business, including those related to litigation, business transactions, employee-related matters, and others. When the Company is aware of a claim or potential claim, it assesses the likelihood of any loss or exposure. If it is probable that a loss will result and the amount of the loss can be reasonably estimated, the Company will record a liability for the loss. If the loss is not probable or the amount of the loss cannot be reasonably estimated, the Company discloses the claim if the likelihood of a potential loss is reasonably possible and the amount involved could be material. The Company is not aware of any claims likely to have a material adverse effect on its financial condition or results of operations.

Tax Filings

The Company's tax filings are subject to audit by taxing authorities in jurisdictions where it conducts business. These audits may result in assessments of additional taxes that are subsequently resolved with the authorities or potentially through the courts. Management believes the Company has adequately provided for any ultimate amounts that are likely to result from these audits; however, final assessments, if any, could be significantly different than the amounts recorded in the condensed consolidated interim financial statements.

Employment Contracts

The Company has entered into employment contracts with certain executive officers. Under the provisions of the contracts, the Company may be required to incur severance obligations for matters relating to changes in control, as defined, and involuntary terminations.

Partnership with Enable

During May 2024, the Company entered into a partnership with Enable Injections, Inc. (“Enable”), a healthcare innovation company developing and manufacturing the enFuse® wearable drug delivery to develop and commercialize SER-252 (POZ-apomorphine) in combination with enFuse for the treatment of Parkinson’s disease. The Company will develop and commercialize SER-252 (POZ-apomorphine) in combination with enFuseTM for the treatment of Parkinson’s disease. The enFuseTM wearable technology from Enable is designed to overcome both IV infusion and other subcutaneous administration method shortcomings through fast, simple, and convenient delivery, benefiting patients, providers, as well as payers, with the ability for at home self-administration. The Company anticipates submission of an Investigational New Drug (IND) application to the U.S. Food and Drug Administration with plans to initiate a Phase 1 clinical trial in advanced Parkinson’s disease patients in 2025. The Company paid $2.0 million in May 2024 for the Enable arrangement and will amortize the cost on a straight-line basis until December 2025.

Indemnification

In the normal course of business, the Company may provide indemnifications of varying scope under the Company’s agreements with other companies or consultants, typically for the Company’s research and development programs. Pursuant to these agreements, the Company will generally agree to indemnify, hold harmless, and reimburse the indemnified parties for losses and expenses suffered or incurred by the indemnified parties arising from claims of third parties in connection with the Company’s research and development. Indemnification provisions could also cover third-party infringement claims with respect to patent rights, copyrights, or other intellectual property licensed from the Company to third parties. Office and laboratory leases will also generally indemnify the lessor with respect to certain matters that may arise during the term of the lease. The Registration Rights Agreement between Juvenescence and the Company includes indemnification provisions pursuant to which the parties will indemnify each other from certain liabilities in connection with the registration, offer, and sale of securities under a registration statement, including liabilities arising under the Securities Act. The Company has also agreed to provide the AST Indemnity and the ETC Indemnity pursuant to the Letter of Indemnification described in Note 5, Related Party Transactions. The term of these indemnification obligations will generally continue in effect after the termination or expiration of the particular license, lease, or agreement to which they relate. The potential future payments the Company could be required to make under these indemnification agreements will generally not be subject to any specified maximum amount. Historically, the Company has not been subject to any claims or demands for indemnification. The Company also maintains various liability insurance policies that limit the Company’s financial exposure and in the case of the AST Indemnity and the ETC Indemnity the Company has received a cross-indemnity from Juvenescence against all claims, damages, liabilities or losses arising out of the AST Indemnity and the ETC Indemnity. As a result, the Company believes the fair value of these

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indemnification agreements is minimal. Accordingly, the Company has not recorded any liabilities for these agreements to date.

12. Net Earnings (Loss) Per Common Share

Net earnings (loss) per common share is calculated in accordance with ASC 260, Earnings Per Share. Basic and diluted net earnings (loss) per common share attributable to common stockholders is calculated for the periods presented (in thousands) as follows.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Basic net earnings (loss) per common share allocable to common stockholders

NUMERATOR
Net income (loss)	1,383		1,752		(8,455)		4,218
Less: net loss attributable to noncontrolling interest	27		—		54		—
Net earnings (loss) attributable to Serina	1,410		1,752		(8,401)		4,218
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share	8,851		2,190		6,774		2,176

Basic net earnings (loss) per common share allocable to common stockholders	$	0.16	$	0.80	$	(1.24)	$	1.94

Diluted net earnings (loss) per common share allocable to common stockholders

NUMERATOR
Net earnings (loss) attributable to Serina	1,410		1,752		(8,401)		4,218
Add back: interest on convertible promissory notes	—		6		—		83
Net earnings (loss) allocable to common stockholders	1,410		1,758		(8,401)		4,301
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share	8,851		2,190		6,774		2,176
Add: dilutive effect of stock options	1,900		1,840		—		1,820
Add: dilutive effect of warrants	—		—		—		—
Add: dilutive effect of common stock issued for convertible promissory notes	—		115		—		113
Add: dilutive effect of redeemable convertible preferred stock	—		3,439		—		3,439
Weighted-average shares of common stock outstanding used to calculate diluted net earnings (loss) per common share	10,751		7,584		6,774		7,548

Diluted net earnings (loss) per common share attributable to common stockholders	0.13		0.23		(1.24)		0.57

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The following table sets forth the outstanding potentially dilutive securities that have been excluded in the calculation of diluted net earnings (loss) per common share because to do so would be anti-dilutive:


	Three and Nine months ended September 30, 2024

Redeemable convertible preferred stock	—	—
Convertible promissory notes	—	—
Stock options	837	3,216
Warrants	3,226	3,226
Total anti-dilutive securities	4,063	6,442

13. Subsequent Events

Nothing to report.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of financial condition and results of operations should be read in conjunction with our unaudited condensed consolidated interim financial statements and notes thereto included in this report and our “Unaudited Pro Forma Condensed Combined Financial Information” attached as Exhibit 99.3, and Serina’s audited consolidated financial statements and related notes for the years ended December 31, 2023 and 2022, attached as Exhibit 99.2, to Serina’s Current Report on Form 8-K filed with the SEC on April 1, 2024 (the “April 1 Form 8-K”). Past operating results are not necessarily indicative of results that may occur in future periods.

The following discussion includes forward-looking statements. See “Forward-Looking Statements,” above. Forward-looking statements are not guarantees of future performance and our actual results may differ materially from those currently anticipated and from historical results depending upon a variety of factors, including, but not limited to, those discussed in Part I, Item 1A. Risk Factors of our April 1 Form 8-K, and in our subsequent filings with the SEC, including any discussed in Part II, Item 1A of this report under the heading “Risk Factors.”

All information presented in this report is based on our fiscal year. Unless otherwise stated, references to particular years, quarters, months or periods refer to our fiscal years ending December 31 and the associated quarters, months and periods of those fiscal years.

Overview

We are a clinical-stage biotechnology company developing a pipeline of wholly owned drug product candidates to treat neurological diseases and pain. Our POZ drug delivery technology is designed to enable certain existing drugs and novel drug candidates to be modified in a way that may provide an increase in efficacy and safety of the resulting polymeric drug conjugate. Our proprietary POZ technology is based on a synthetic, water soluble, low viscosity polymer called poly(2-oxazoline). Our POZ technology is engineered to provide greater control in drug loading and more precision in the rate of release of attached drugs delivered via subcutaneous injection. The therapeutic agents in our product candidates are typically well-understood and marketed drugs that are effective but are limited by pharmacokinetic profiles that can include toxicity, side effects and short half-life. We believe that by using POZ technology, drugs with narrow therapeutic windows can be designed to maintain more desirable and stable levels in the blood.

The following discussion should be read in conjunction with Note 1 in our unaudited condensed consolidated interim financial statements and the related notes above.

On March 26, 2024, we completed the Merger, pursuant to which Merger Sub merged with and into Legacy Serina, with Legacy Serina surviving as our wholly owned subsidiary. Additionally, on March 26, 2024, we changed our name to “Serina Therapeutics, Inc.” See the Explanatory Note included elsewhere in this Report for additional information regarding completion of the Merger.

Our operations through September 30, 2024, have been financed primarily by aggregate net proceeds of $51.9 million from the issuance of convertible preferred stock and convertible notes and exercise of Post-Merger Warrants to purchase our common shares by Juvenescence. Since our inception in 2006, we have had significant operating losses. Our operating loss was $11.5 million and $3.4 million for nine months ended September 30, 2024 and 2023, respectively. As of September 30, 2024, we had an accumulated deficit of $13.8 million and $3.2 million in cash and cash equivalents.

Our losses from operations, negative operating cash flows and accumulated deficit, as well as the additional capital needed to fund operations within one year of the unaudited condensed consolidated interim financial statements issuance date, raise substantial doubt about our ability to continue as a going concern. We expect to incur substantial expenditures in the foreseeable future for the development of our product candidates and will require additional financing to continue this development.

Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as reflected in the change in our accounts payable and accrued expenses. We expect to continue to incur net losses for the foreseeable future, and we expect our research and development expenses, general and administrative expenses, and capital expenditures will continue to increase. In particular, we expect our expenses to increase as we continue our development of, and seek regulatory approvals for, our product candidates, as well as hire additional personnel, pay fees to outside consultants, attorneys, and accountants, and, incur other increased costs associated with being a public company. In addition, if and when we seek and obtain regulatory approval to commercialize any product candidate, we will also incur increased expenses in connection with commercialization and marketing of any such product. Our net losses may fluctuate significantly from quarter to

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quarter and year to year, depending on the timing of our clinical trials and our expenditures on other research and development activities. We anticipate that our expenses will increase significantly in connection with our ongoing activities as we:

•advance our lead product candidate, SER 252 into Phase I clinical trials;

•advance our other product candidates;

•advance our preclinical programs to clinical trials;

•further invest in our pipeline;

•seek regulatory approval for our investigational medicines;

•maintain, expand, protect, and defend our intellectual property portfolio;

•secure facilities to support continued growth in our research, development, and commercialization efforts; and

•increase our headcount to support our development efforts and to expand our clinical development team.

We have not had any products approved for sale. We do not expect to generate any product sales unless and until we successfully complete development and obtain regulatory approval for one or more of our product candidates. If we obtain regulatory approval for any of our product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing, and distribution. As a result, until such time, if ever, that we can generate substantial product revenue, we expect to finance our cash needs through equity offerings, debt financings or other capital sources, including collaborations, licenses, or similar arrangements. However, we may be unable to raise additional funds or enter into such other arrangements when needed or on favorable terms, if at all. Any failure to raise capital as and when needed could have a negative impact on our financial condition and on our ability to pursue our business plans and strategies, including our research and development activities. If we are unable to raise capital, we will need to delay, reduce, or terminate planned activities to reduce costs.

Critical Accounting Estimates

This Management’s Discussion and Analysis of Financial Condition and Results of Operations discusses and analyzes data in our unaudited condensed consolidated interim financial statements, which we have prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Preparation of the financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Management bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Senior management has discussed the development, selection and disclosure of these estimates with the Audit Committee of our Board of Directors. Actual conditions may differ from our assumptions and actual results may differ from our estimates.

An accounting policy is deemed critical if it requires an accounting estimate to be made based on assumptions about matters that are highly uncertain at the time the estimate is made, if different estimates reasonably could have been used, or if changes in the estimate are reasonably likely to occur, that could materially impact the financial statements. Management believes that there have been no significant changes during the nine months ended September 30, 2024 to the items that we disclosed as our critical accounting policies and estimates in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report in the April 1 Form 8-K for the year ended December 31, 2023, except as disclosed in Note 2, Basis of Presentation and Summary of Significant Accounting Policies, of our unaudited condensed consolidated interim financial statements included elsewhere in this Report.

Components of Operating Results

Grant Revenues

Our grants and contracts reimburse us for direct and indirect costs relating to the grant projects and also provide us with a pre-negotiated profit margin on total direct and indirect costs of the grant award, excluding subcontractor costs, after giving effect to directly attributable costs and allowable overhead costs. Funds received from grants and contracts are generally

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deemed to be earned and recognized as revenue as allowable costs are incurred during the grant or contract period and the right to payment is realized.

Operating Expenses

Our operating expenses since inception have consisted primarily of research and development expenses and general and administrative costs.

Research and Development

Our research and development expenses consist primarily of costs incurred for the development of our product candidates and our drug discovery efforts, which include:

•personnel costs, which include salaries, benefits and equity-based compensation expense;

•expenses incurred under agreements with consultants and contract organizations that conduct research and development activities on our behalf;

•costs related to production of preclinical and clinical materials, including fees paid to contract manufacturers;

•laboratory and vendor expenses related to the execution of preclinical studies and planned clinical trials; and

•laboratory supplies and equipment used for internal research and development activities.

We expense all research and development costs in the periods in which they are incurred. Costs for certain research and development activities are recognized based on an evaluation of the progress to completion of specific tasks using information and data provided to us by our vendors and service providers.

Our research and development expenses are not currently tracked on a program-by-program basis. We use our personnel and infrastructure resources across multiple research and development programs directed toward identifying and developing product candidates and therefore have not implemented the systems and procedures to track research and development expenses on a program-by-program basis. We track research and development expenses based on the type of expense as further described below under “Results of Operations – Research and Development Expenses.” Substantially all our historical research and development costs were incurred on the development of our preclinical candidates and advancing research on our POZ lipid technology.

We expect our research and development expenses to increase substantially for the foreseeable future as we continue to invest in research and development activities related to developing our product candidates, including investments in conducting clinical trials, manufacturing and otherwise advancing our programs. The process of conducting the clinical research necessary to obtain regulatory approval is costly and time consuming, and the successful development of our product candidates is highly uncertain.

Because of the numerous risks and uncertainties associated with product development and the current stage of development of our product candidates and programs, we cannot reasonably estimate or know the nature, timing, and estimated costs necessary to complete the remainder of the development of our product candidates or programs. We are also unable to predict if, when, or to what extent we will obtain approval and generate revenues from the commercialization and sale of any of our product candidates. The duration, costs and timing of preclinical studies and clinical trials and development of our product candidates will depend on a variety of factors, including:

•successful completion of preclinical studies and initiation of clinical trials for future product candidates;

•successful enrollment and completion of clinical trials for our current product candidates;

•data from our clinical programs that support an acceptable risk benefit profile of our product candidates in the intended patient populations; acceptance by the U.S. Food and Drug Administration, or FDA, or other applicable regulatory agencies of the Investigational New Drug, or IND, applications, clinical trial applications and/or other regulatory filings for SER 252 and other product candidates.

•expansion and maintenance of a workforce of experienced scientists and others to continue to develop our product candidates;

•successful application for and receipt of marketing approvals from applicable regulatory authorities;

•obtainment and maintenance of intellectual property protection and regulatory exclusivity for our product candidates;

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•making of arrangements with contract manufacturing organizations for, or establishment of, commercial manufacturing capabilities;

•establishment of sales, marketing and distribution capabilities and successful launch of commercial sales of our product candidates, if and when approved, whether alone or in collaboration with others;

•acceptance of our product candidates, if and when approved, by patients, the medical community and third party payors;

•effective competition with other therapies;

•obtainment and maintenance of coverage, adequate pricing, and adequate reimbursement from third party payors, including government payors;

•maintenance, enforcement, defense, and protection of our rights in our intellectual property portfolio;

•avoidance of infringement, misappropriation, or other violations with respect to others’ intellectual property or proprietary rights; and

•maintenance of a continued acceptable safety profile of our products following receipt of any marketing approvals.

We may never succeed in achieving regulatory approval for any of our product candidates. We may obtain unexpected results from our preclinical studies and clinical trials. We may elect to discontinue, delay, or modify clinical trials of some product candidates or focus on others. A change in the outcome of any of these factors could mean a significant change in the costs and timing associated with the development of our current and future preclinical and clinical product candidates. For example, if the FDA or another regulatory authority were to require us to conduct clinical trials beyond those that we currently anticipate will be required for the completion of clinical development, or if we experience significant delays in execution of or enrollment in any of our preclinical studies or clinical trials, we could be required to expend significant additional financial resources and time on the completion of preclinical and clinical development.

Research and development activities account for a significant portion of our operating expenses. We expect our research and development expenses to increase for the foreseeable future as we continue to implement our business strategy, which includes advancing SER 252 and our other product candidates through clinical development, expanding our research and development efforts, including hiring additional personnel to support our research and development efforts, and seeking regulatory approvals for our product candidates that successfully complete clinical trials. In addition, product candidates in later stages of clinical development generally incur higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later stage clinical trials. As a result, we expect our research and development expenses to increase as our product candidates advance into later stages of clinical development. However, we do not believe that it is possible at this time to accurately project total program specific expenses through commercialization. There are numerous factors associated with the successful commercialization of any of our product candidates, including future trial design and various regulatory requirements, many of which cannot be determined with accuracy at this time based on our stage of development.

General and Administrative Expenses

Our general and administrative expenses consist primarily of personnel costs, including equity-based compensation, and other expenses for outside professional services, including legal, recruiting, audit and accounting, and facility related costs not otherwise included in research and development expenses. Personnel costs consist of salaries, benefits and equity-based compensation expense for our personnel in executive and other administrative functions. We expect our general and administrative expenses to increase over the next several years to support our continued research and development activities, manufacturing activities, increased costs of expanding our operations and operating as a public company. These increases will likely include increases related to the hiring of additional personnel and legal, regulatory, and other fees and services associated with maintaining compliance with the NYSE American Company Guide and Securities and Exchange Commission, or SEC, requirements, director and officer insurance costs, and investor relations costs associated with being a public company.

Other Income/(Expense)

Our other income is comprised of interest income on our cash equivalents, and changes in fair value of our convertible notes and liability-classified warrants.

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Our other expense is comprised of expenses related to the change in fair value of the embedded derivatives and interest accrued from the convertible notes.

Results of Operations

Comparison of Three and Nine Months Ended September 30, 2024 and 2023

The table presented below shows our operating expenses for the periods presented (in thousands).


	Three Months Ended September 30,				$ Increase/ (Decrease)
	2024		2023
Research and development expenses	$	2,415	$	603	$	1,812
General and administrative expenses	2,911		889		2,022
Other income, net	6,695		3,215		3,480
Total	$	1,369	$	1,723	$	(354)


	Nine Months Ended September 30, 2024				$ Increase/ (Decrease)
	2024		2023
Research and development expenses	$	5,115	$	1,481	$	3,634
General and administrative expenses	6,454		1,955		4,499
Other income, net	3,044		7,588		(4,544)
Total	$	(8,525)	$	4,152	$	(12,677)

Revenues

Revenues for the three and nine months ended September 30, 2024 and 2023 were not material.

Research and development expenses

Research and development expenses were $2.4 million for the three months ended September 30, 2024, compared to $0.6 million for the same period in 2023. The increase of $1.8 million is primarily due to increases of $0.8 million in salaries and payroll related expenses due to increase in headcount, $0.5 million in professional fees for the maintenance of certain patent and other intellectual property and biological material assets included in Legacy Assets, and $0.5 million in outside research services and consultants for research programs.

Research and development expenses were $5.1 million for the nine months ended September 30, 2024, compared to $1.5 million for the same period in 2023. The increase of $3.6 million is primarily due to increase of (1) $1.2 million in salaries and payroll related expenses due to increase in headcount, (2) $0.9 million in professional fees related to the maintenance of certain patent and other intellectual property, and biological material assets included in Legacy Assets (3) $0.9 million in outside research services and consultants for research programs, (4) $0.3 million in severance expense and (5) $0.3 million increase in other miscellaneous expenses including facility, laboratory and depreciation.

See Notes 1, Organization, Business Overview and Liquidity and 5, Related Party Transactions to our unaudited condensed consolidated interim financial statements included elsewhere in this Report for additional information about the Legacy Assets.

General and administrative expenses

General and administrative expenses were $2.9 million for the three months ended September 30, 2024, compared to $0.9 million for the same period in 2023. The increase of $2.0 million is due primarily to increases of (1) $0.9 million of stock based compensation expenses as a result of new directors and new hire option grants, (2) $0.5 million of consulting expenses to assist with the implementation of new platforms and software, (3) a non-recurring $0.3 million severance expense (4) $0.2 million in compensation and related expenses as a result of increased headcount (5) $0.2 million in

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directors and officers insurance, and (6) $0.2 million in miscellaneous expenses that were individually insignificant. These expenses were offset by a decrease of $0.3 million in professional legal and accounting services incurred largely in connection with the Merger which consummated on March 26, 2024.

General and administrative expenses were $6.5 million for the nine months ended September 30, 2024, compared to $2.0 million for the same period in 2023. The increase of $4.5 million is due primarily to increases of (1) $1.2 million of stock based compensation expenses as a result of new directors grant and new hire option grants (2) $0.8 million of consulting expenses to assist with the implementation of new platforms and software, (3) $0.5 million in salaries and payroll related expenses due to increased headcount (4) $0.4 million in directors and officers insurance (5) $0.9 million in professional legal and accounting services incurred largely in connection with the Merger which consummated on March 26, 2024, (6) $0.3 million severance expense, and (7) $0.3 million in market research and our website development related expenses.

Other income, net

Other income, net was $6.7 million for the three months ended September 30, 2024, compared to $3.2 million for the same period in 2023. The increase of $3.5 million is primarily attributable to an increase of $6.1 million in the gain from the change in fair value of liability classified Merger Warrants during three months ended September 30, 2024 compared to the same period in 2023. This aggregate increase was offset by the loss in the fair value of the Legacy Serina Convertible Notes and the AgeX-Serina Note of $2.6 million.

Other income, net was $3.0 million for the nine months ended September 30, 2024 as compared to $7.6 million for the same period in 2023. The decrease of $4.6 million is primarily attributable to: (1) the aggregate change in the fair value of the Legacy Serina Convertible Notes and the AgeX-Serina Note which amounted to a $13.7 million loss (2) the increase in amortization of deferred debt issuance costs related to the 2022 Secured Note which amounted $0.1 million (3) offset to some extent by the change in fair value of liability classified Merger Warrants which amounted to a gain of $9.3 million.

See Note 5, Related Party Transactions to our unaudited condensed consolidated interim financial statements included elsewhere in this Report for additional information about the 2022 Secured Note. See Notes 6, Fair Value Measurements and 7, Stockholders’ Equity/(Deficit) to our unaudited condensed consolidated interim financial statements included elsewhere in this Report for additional information on fair value adjustments of convertible promissory notes, Legacy Serina warrants, liability classified Merger Warrants, and conversion of the AgeX-Serina Note upon consummation of the Merger on March 26, 2024.

Liquidity and Capital Resources

Sources of Liquidity

We had $3.2 million in cash and cash equivalents as of September 30, 2024. Our operations have been financed primarily by the issuance of common stock, convertible preferred stock, and convertible notes by AgeX and Serina prior to the Merger, and by $2.9 million drawn under the 2022 Secured Convertible Promissory Note (the “2022 Secured Note”) subsequent to consummation of the Merger. We have drawn down the entire amount of credit that was made available to us through the 2022 Secured Note. See Note 5, Related Party Transactions to our unaudited condensed consolidated interim financial statements included elsewhere in this Report for additional information about the 2022 Secured Note. In addition, we received $5.0 million from Juvenescence during June 2024 through the exercise of Post-Merger Warrants. Juvenescence has agreed to exercise the remaining Post-Merger Warrants it holds in accordance with the following schedule, which will provide us with $10.0 million of additional funds.

Post-Merger Warrant
Exercise Deadline

Number of
Post-Merger
Warrants
to Be Exercised

Amount of Proceeds

November 30, 2024

377,864

$ 5.0 million

June 30, 2025

377,864

$ 5.0 million

Our primary use of cash is to fund operating expenses, which consist primarily of research and development expenditures, and to a lesser extent, general and administrative expenditures. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as reflected in the change in our outstanding accounts payable and accrued expenses.

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Since inception, we have had significant operating losses and negative cash flows as of September 30, 2024 and had an accumulated deficit of $21.8 million. Our losses from operations, negative operating cash flows and accumulated deficit, as well as the additional capital needed to fund operations within one year of the issuance date of our unaudited condensed consolidated interim financial statements included in this Report, raise substantial doubt about our ability to continue as a going concern. If we do not receive the $10 million of cash proceeds expected from Juvenescence through the exercise of the Post-Merger Warrants pursuant to the terms of the Side Letter, there is substantial doubt about the Company’s ability to continue as a going concern. We expect to incur substantial expenditures in the foreseeable future for the development of our product candidates and will require additional financing to continue this development. Our unaudited condensed consolidated interim financial statements have been prepared on a basis that assumes that we will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The unaudited condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should we be unable to continue as a going concern.

The unavailability or inadequacy of financing to meet future capital needs could force us to modify, curtail, delay, or suspend some or all aspects of planned operations.

Funding Requirements

Any product candidates we may develop may never achieve commercialization, and we anticipate that we will continue to incur losses for the foreseeable future. We expect that our research and development expenses, general and administrative expenses, and capital expenditures will continue to increase. Our primary uses of capital are, and we expect will continue to be, costs related to pre-clinical and clinical research, clinical studies, manufacturing, and development services; compensation and related expenses; costs relating to the build out of our laboratories at our headquarters; license payments or milestone obligations that may arise; laboratory expenses and costs for related supplies; manufacturing costs; legal and other regulatory expenses and general overhead costs.

We believe that our cash on hand, along with the $10.0 million of cash proceeds expected to be received from Juvenescence through the exercise of the remaining Post-Merger Warrants it holds, as provided in the Side Letter, will not be sufficient to enable us to fund our operations through calendar year 2025 based on our current plan. To finance our operations beyond that point, we will need to raise additional capital, which cannot be assured. We have based this estimate on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we currently expect. We will continue to require additional financing to advance our current product candidates through clinical development, to develop, acquire or in license other potential product candidates and to fund operations for the foreseeable future. We will continue to seek funds through equity offerings, debt financings or other capital sources, including potential collaborations, licenses, and other similar arrangements. However, we may be unable to raise additional funds or enter into such other arrangements when needed on favorable terms or at all. If we do raise additional capital through public or private equity offerings, the ownership interest of our existing stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’ rights. If we raise additional capital through debt financing, we may be subject to covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures, or declaring dividends. Any failure to raise capital as and when needed could have a negative impact on our financial condition and on our ability to pursue our business plans and strategies. If we are unable to raise capital, we will need to delay, reduce, or terminate planned activities to reduce costs.

Because of the numerous risks and uncertainties associated with research, development, and commercialization of pharmaceutical products, we are unable to estimate the exact amount of our operating capital requirements. Our future funding requirements will depend on many factors, including, but not limited to:

•the progress, costs and results of IND enabling studies for our lead product candidate SER 252 and our potential future clinical trials for SER 252;

•the scope, progress, results and costs of discovery research, preclinical development, laboratory testing and clinical trials for our other product candidates;

•the costs, timing, and outcome of regulatory review of our product candidates;

•our ability to enter into contract manufacturing arrangements for supply of active pharmaceutical ingredient, or API, and manufacture of our product candidates and the terms of such arrangements;

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•our ability to establish and maintain strategic collaborations, licensing or other arrangements and the financial terms of such arrangements;

•the payment or receipt of milestones and receipt of other collaboration-based revenues, if any; the costs and timing of any future commercialization activities, including product manufacturing, sales, marketing, and distribution, for any of our product candidates for which we may receive marketing approval;

•the amount and timing of revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval;

•the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property and proprietary rights and defending any intellectual property related claims;

•the extent to which we acquire or in license other products, product candidates, technologies, or data referencing rights;

•the ability to receive additional nondilutive funding, including grants from organizations and foundations; and

•the costs of operating as a public company

Further, our operating plans may change, and we may need additional funds to meet operational needs and capital requirements for clinical trials and other research and development activities. Because of the numerous risks and uncertainties associated with the development and commercialization of our product candidates, we are unable to estimate the amounts of increased capital outlays and operating expenditures associated with our current and anticipated product development programs.

Cash Flows

The following table summarizes the major sources and uses of cash for the periods set forth below (in thousands):


	Nine Months Ended September 30, 2024
	2024		2023		$ Change		% Change
Net cash used in operating activities	$	(12,548)	$	(2,597)	$	(9,951)	383.2	%
Net cash used in investing activities	(17)		(434)		417		(96.1)	%
Net cash provided by financing activities	8,181		10,080		(1,899)		(18.8)	%
Net increase in cash	$	(4,384)	$	7,049	$	(11,433)	(162.2)	%

Operating Activities

Net loss for the nine months ended September 30, 2024 was $8.5 million. Net cash used in operating activities during this period amounted to $12.5 million. The $4.0 million difference between the net loss and net cash used in operating activities during the nine months ended September 30, 2024 was comprised of non-cash items, totaling $1.0 million and changes in operating assets and liabilities totaling $3.0 million. The net $1.0 million increase of non-cash items primarily consisted of a $10.4 million gain from the change in the fair value of warrants, offset by a $7.0 million loss from the change in fair value of convertible notes, $1.6 million in stock-based compensation, $0.3 million amortization of deferred debt issuance costs, $0.2 million decrease in accrued interest on the AgeX-Serina Note and $0.3 million in depreciation and non-cash lease expenses. The net $3.0 million cash used in operating assets and liabilities primarily consisted of a $2.4 million increase in prepaid expenses (comprised of $1.7 million in prepaid technology access fee and $0.7 million in other prepaid expenses and current assets), and a $0.7 million decrease in accounts payable.

Net income for the nine months ended September 30, 2023 was $4.2 million. Net cash used in operating activities during this period amounted to $2.7 million. The $6.9 million difference between the net gain and net cash used in operating activities during the nine months ended September 30, 2023 was comprised of non-cash items, totaling $7.2 million, offset by the increase in operating assets and liabilities totaling $0.3 million. The net $7.2 million increase of non-cash items primarily consisted of a $4.5 million gain from the change in fair value of convertible notes, $2.2 million loss from the fair value at inception adjustment on the convertible notes, a $1.1 million gain from the change in the fair value of warrants,

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offset by the increase in $0.4 million in accrued interest on the AgeX-Serina Note and $0.2 million increase in other non-cash items that were individually insignificant. The increase of $0.3 million cash from changes in operating assets and liabilities primarily consisted of $0.5 million increase in accounts payable, offset by $0.1 million decreases in both accrued expenses and operating leases liabilities.

Investing Activities

Net cash used in investing activities during the nine months ended September 30, 2024 was immaterial and entirely related to purchases of office and laboratory equipment.

Net cash used in investing activities during the nine months ended September 30, 2023 was $0.4 million related to the purchases of capital equipment.

Financing Activities

Net cash provided by financing activities for the nine months ended September 30, 2024 of $8.2 million is primarily attributable to $5.0 million of proceeds received from the exercise of 377,865 Post-Merger Warrants by Juvenescence, $2.9 million drawn under the loan facilities from Juvenescence, $0.3 million cash and restricted cash acquired in connection with the Merger and $0.1 million from the exercise of stock options. These changes were offset to some extent by $0.1 million repayment of principal on loan facilities to Juvenescence. See Note 5, Related Party Transactions, to our condensed consolidated interim financial statements included elsewhere in this Report for additional information about our loan agreements with Juvenescence.

Net cash provided by financing activities for the nine months ended September 30, 2023 of $10.1 million was primarily attributable to the net proceeds from the issuance of $0.1 million of Serina Convertible Notes and $10.0 million from the AgeX-Serina Note. See Note 5, Related Party Transactions, to our condensed consolidated interim financial statements included in this Report for additional information.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Under SEC rules and regulations, as a smaller reporting company, we are not required to provide the information required by this item.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

It is management’s responsibility to establish and maintain adequate internal control over all financial reporting pursuant to Rule 13a-15 under the Exchange Act. Our management, including our principal executive officer and principal financial officer, have reviewed and evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) promulgated under the Exchange Act) as of the end of the period covered by this report. Following this review and evaluation, the principal executive officer and principal financial officer determined that our disclosure controls and procedures were not effective as of September 30, 2024, due to material weaknesses described below.

In light of the conclusion that our disclosure controls and procedures are considered ineffective as of September 30, 2024, we have applied procedures and processes as necessary to ensure the reliability of our financial reporting in regard to this quarterly report. Accordingly, the Company believes, based on its knowledge, that: (i) this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which they were made, not misleading with respect to the period covered by this report; and (ii) the financial statements, and other financial information included in this quarterly report, fairly present in all material respects our financial condition, results of operations and cash flows as of and for the periods presented in this quarterly report.

Material Weaknesses

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis.

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In the evaluation of our disclosure controls and procedures discussed above, we identified material weaknesses due to a lack of internal controls at the Company. Specifically, management has determined the following:

•a lack of sufficient in-house qualified accounting staff;

•a lack of validation of completeness and accuracy of internally prepared data, including key reports generated from systems, utilized in the operations of controls;

•inadequate controls and segregation of duties due to limited resources and number of employees;

•substantial reliance on manual reporting processes and spreadsheets external to the accounting system for financial reporting leading to delays in the Company’s closing process; and

•a lack of experience in monitoring and administering the Company’s internal control over financial reporting.

To mitigate the items identified in the assessment, we rely heavily on direct management oversight of transactions, along with the use of legal and accounting professionals/consultants.

Remediation Plan

The Company began implementation of remedial measures to address the material weaknesses, which primarily stem from the Company’s small workforce and limited resources prior to the Merger. Following the Merger, the accounting and financial operations personnel and resources from AgeX started to monitor and administer Legacy Serina’s internal controls over financial reporting and development. During June 2024, Company also engaged financial operations consultants to evaluate and implement internal controls. In July 2024, one of these consultants was appointed as the Controller for the Company.

The material weaknesses will not be remediated until our remediation plan has been fully developed and implemented, the applicable controls operate for a sufficient period of time, and we have concluded, through testing by management and by our independent accountants, that the newly implemented and enhanced controls are operating effectively. We will continue to monitor and evaluate the effectiveness of our internal controls and procedures over financial reporting on an ongoing basis and are committed to taking further action and implementing additional enhancements or improvements, as necessary and as funds allow.

Changes in Internal Controls

Other than as described above, there was no change in our internal control over financial reporting that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitation on the Effectiveness Over Financial Reporting

The effectiveness of any system of internal control over financial reporting, including ours, is subject to inherent limitations, including the exercise of judgment in designing, implementing, operating, and evaluating the controls and procedures, and the inability to eliminate misconduct completely. Accordingly, any system of internal control over financial reporting, including ours, no matter how well designed and operated, can only provide reasonable and not absolute assurances. In addition, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. We intend to continue to monitor and upgrade our internal controls as necessary or appropriate for our business, but there can be no assurance such improvements will be sufficient to provide us with effective internal control over financial reporting.

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PART II — OTHER INFORMATION

Item 1. Legal Proceedings

We may from time to time be a party to litigation and subject to claims incident to the ordinary course of business. In the future, we may become a party to an increasing number of litigation matters and claims, including in connection with Merger Agreement and the transactions contemplated thereby. The outcome of litigation and claims cannot be predicted with certainty, and the resolution of these matters could materially affect our future results of operations, cash flows or financial position.

Item 1A. Risk Factors

Our business, financial condition, results of operations and future growth prospects are subject to various risks, including those described under “Risk Factors” in our Current Report on Form 8-K filed with the Securities and Exchange Commission on April 1, 2024 (the “Form 8-K”), which we encourage you to review. There have been no material changes from the risk factors disclosed in the Form 8-K, except as follows:

We need additional financing to execute our operating plan and continue to operate as a going concern.

As required under Accounting Standards Update 2014-15, Presentation of Financial Statements-Going Concern (ASC 205-40), we have the responsibility to evaluate whether conditions and/or events raise substantial doubt about our ability to meet our future financial obligations as they become due within one year after the date the financial statements are issued. Based on our most recent projected cash flows, we believe that our cash and cash equivalents, even with the amount of credit remaining available under our loan agreements with Juvenescence would not be sufficient to satisfy our anticipated operating and other funding requirements for the next twelve months from the date of filing of this Report. Additionally, there is a risk we may not receive the remaining $10 million of additional funds expected from Juvenescence through the exercise of the Post-Merger Warrants pursuant to the terms of the Side Letter. These factors raise substantial doubt regarding our ability to continue as a going concern and the report of our independent registered public accountants accompanying our audited consolidated financial statements in this Report contains a qualification to such effect.

We have incurred operating losses and negative cash flows since inception and had an accumulated deficit of $21.8 million as of September 30, 2024. We expect to continue to incur operating losses and negative cash flows. Because we will continue to experience net operating losses, our ability to continue as a going concern is subject to our ability to obtain necessary capital from outside sources, including obtaining additional capital from the sale of our common stock or other equity securities or assets, obtaining additional loans from financial institutions or investors, and entering into collaborative research and development arrangements or licensing some or all of our patents and know-how to third parties while retaining a royalty and other contingent payment rights related to the development and commercialization of products covered by the licenses. Our continued net operating losses, the amount of our debt obligations to Juvenescence and the provisions of our indebtedness agreements with them, including restrictions on the use of loan funds and the security interest they hold in our assets, the risks associated with the development of our product candidates and technologies, and our deferral of in-house development of our product candidates and technologies in connection with our reductions in staffing and the closing of our research laboratory facilities, will increase the difficulty in obtaining such capital, and there can be no assurances that we will be able to obtain such capital on favorable terms or at all. If we are unable to raise capital when needed, we may be forced to delay, reduce or eliminate our research and development activities, or ultimately not be able to continue as a going concern.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Previously reported.

Item 3. Default Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not Applicable.

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Item 5. Other Information

Certain Trading Arrangements

During the three months ended September 30, 2024, none of the directors or officers of the Company, nor the Company itself, adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of SEC Regulation S-K.

Item 6. Exhibits

Incorporation By Reference

Exhibit Number

Description of Document

Form

SEC

File No.

Exhibit

Filing Date

10.1‡

Employment Agreement, dated as of September 9, 2024, by and among Serina Therapeutics, Inc., Serina Therapeutics (AL), Inc. and Steve Ledger

8-K

001-38519

10.1

9/12/2024

10.2‡*

Employment Agreement, dated as of July 15, 2024, by and between Serina Therapeutics, Inc. and Srini Tenjarla

10.3‡*

Confidential Consulting Agreement, dated as of May 31, 2024, by and between Serina Therapeutics, Inc. and FLG Partners, LLC

31*

Rule 13a-14(a)/15d-14(a) Certification

32**

Section 1350 Certification

101.INS*

Inline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)

101.SCH*

Inline XBRL Taxonomy Extension Schema

101.CAL*

Inline XBRL Taxonomy Extension Calculation Linkbase

101.DEF*

Inline XBRL Taxonomy Extension Definition Linkbase

101.LAB*

Inline XBRL Taxonomy Extension Label Linkbase

101.PRE*

Inline XBRL Taxonomy Extension Presentation Linkbase

104

Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Filed herewith.

**Furnished herewith.

†Certain schedules and exhibits to this agreement have been omitted in accordance with Item 601(b)(2) of Regulation S-K. A copy of any omitted schedule and/or exhibit will be furnished to the Securities and Exchange Commission on request.

#Schedules and exhibits to this Exhibit have been omitted pursuant to Item 601(b)(10) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished to the Securities and Exchange Commission or its staff upon request

‡Management contract or compensatory plan.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


			SERINA THERAPEUTICS, INC.

Date: November 12, 2024			/s/ Steve Ledger
			Steve Ledger
			Chief Executive Officer

Date: November 12, 2024			/s/ Gregory S. Curhan
			Gregory S. Curhan
			Chief Financial Officer

EXECUTIVE EMPLOYMENT AGREEMENT

(Srini Tenjarla)

This Executive Employment Agreement (“Agreement”) is made and entered into effective as of the 15th day of July, 2024 (the “Effective Date”), by and between Serina Therapeutics, Inc., an Alabama corporation (the "Company"), and Srini Tenjarla (the "Executive"). Each of the Company and the Executive sometimes may be referred to herein as a “Party,” and they sometimes collectively may be referred to herein as the “Parties.”

WHEREAS, the Company and the Executive desire for the Executive to provide services to the Company on the terms and conditions set forth herein, including without limitation, those services as requested by the Chief Development Officer of the Company; and

WHEREAS, the Executive desires to become employed by the Company as its Senior Vice President, CMC & Formulation on the terms and conditions hereinafter set forth.

NOW, THEREFORE, in consideration of all of the covenants and agreements hereinafter set forth, the receipt and sufficiency of which are hereby acknowledged, the Parties, intending to be legally bound, agree as follows:

1. Term and Termination.

1.1 Term. Effective on the Effective Date and prior to executing this Agreement, the Company employs the Executive as the Senior Vice President, CMC & Formulation, and the Executive hereby accepts such employment, as an “at-will” employee, to perform certain duties for the Company on the terms and conditions set forth in this Agreement. The term of this Agreement shall begin on the Effective Date and shall continue until terminated by either Party as forth herein (the “Term”).

1.2 Termination. The Parties expressly acknowledge that this is an agreement for employment at-will, and that the Company or the Executive may terminate this Agreement and the Executive’s employment with the Company, at any time, with or without cause, for any reason whatsoever or for no reason, and with or without prior notice.

1.3 Effect of Termination. Upon any termination of the Executive’s employment with the Company, irrespective of the reason for such termination, the Executive will be entitled to receive all compensation earned through the date of such termination pursuant to Section 3 of this Agreement through the date of such termination, but the Executive would not be entitled to any other payments or continued benefits from the Company under this Agreement except as provided in Section 3.7.

2. Duties. During the Term, the Executive will be responsible for implementing and overseeing the chemistry, manufacturing, and controls and formulation activities across Serina’s current and future pipeline assets and further will have the responsibilities, duties, functions, and authorities set forth in the job description attached hereto as Exhibit A. During the Term, the Executive shall devote his time, skill, attention, and best efforts to the business and affairs of the Company to the extent reasonably necessary to discharge fully, faithfully, and efficiently the duties and responsibilities delegated and assigned to the Executive (vacations and reasonable absences due to illness excepted, in accordance with applicable Company policy). The Executive shall perform such duties in the Company’s Huntsville, Alabama office, and the Executive agrees to relocate and move to the Huntsville area. The duties, titles, and supervisors of the Executive may be changed from time to time by the Company in its reasonable discretion. The Executive understands that he will be subject to all of the Company’s policies and work rules as outlined in his offer letter of June 13, 2024, including, but not limited to, the Company’s Code of Business Conduct and Ethics and the Company’s Insider Trading Policy.

3. Compensation.

3.1 Salary. Throughout the Term, as compensation for the services provided by the Executive to the Company, the Company will pay the Executive a salary, which may be adjusted at the reasonable discretion of the Company. At the start of the Term, Executive’s salary will be $375,000, payable

on a semi-monthly basis and subject to customary deductions and withholdings as required by law. The Executive will be eligible to receive an annual cost-of-living pay adjustment in this base salary after the completion of one full year of employment.

3.2 Signing Bonus. The Executive will receive a $25,000 signing bonus once on the payroll and after executing the required hiring documents. This signing bonus is subject to a pro-rata clawback for one year, meaning that, if employment is terminated by either Party for any reason, a proportional amount of the signing bonus for that year must be paid back to the Company.

3.3 Performance Bonus. The Executive will be eligible to receive a discretionary performance bonus at the end of each calendar year based upon a bonus target of 50 percent of his annual salary.

3.4 Relocation. The Company will provide a temporary monthly housing allowance for 9 months or until the Executive moves into permanent housing in Huntsville. The Company also will provide an executive relocation service for the movement of household goods, automobiles, and recreational vehicles to Huntsville.

3.5 Expenses. The Executive shall be reimbursed (in accordance with applicable Company policy) for all reimbursable travel and business expenses incurred by the Executive in the performance of his duties under this Agreement.

3.6 Equity. The Executive will be eligible to receive nonqualified stock options in the amount of 185,000 options which will be described and governed in all respects by a separate stock option agreement.

3.7 Severance Pay. If the Executive’s employment is terminated for no cause by the Company, the Executive will receive 6 months of base salary with a pro-rated bonus (minimum of one-half of the full annual bonus). If Executive’s employment is terminated for cause by the Company or by the Executive voluntarily, the Executive will not be entitled to any severance payment. For purposes of this Section 3.7, “cause” shall mean (a) the Executive's failure to perform Executive's duties, (b) the Executive's failure to comply with any valid and legal directive of the Company, (c) the Executive's engagement in dishonesty, illegal conduct, or misconduct which is, in each case, injurious to the Company or its affiliates, (d) the Executive's embezzlement, misappropriation, or fraud, whether or not related to the Executive's employment with the Company, (e) the Executive's conviction of or plea of guilty or nolo contendere to a crime that constitutes a felony (or state law equivalent) or a crime that constitutes a misdemeanor involving moral turpitude, (f) the Executive's violation of the Company's written policies or codes of conduct, including written policies related to discrimination, harassment, performance of illegal or unethical activities, and ethical misconduct, (g) the Executive's willful unauthorized disclosure of Confidential Information or violation of his restrictive covenants (as defined in Section 7 below), (h) the Executive's material breach of any material obligation under this Agreement or any other written agreement between the Executive and the Company, or (i) the Executive's engagement in conduct that brings or is reasonably likely to bring the Company negative publicity or into public disgrace, embarrassment, or disrepute.

4. Benefits. The Executive shall be entitled to participate in all employee benefit plans, practices, and programs maintained by the Company, as in effect from time to time (collectively, "Employee Benefit Plans"), on a basis which is no less favorable than is provided to other similarly situated executives of the Company and to the extent consistent with applicable law and the terms of the applicable Employee Benefit Plans. The Company reserves the right to amend or terminate any Employee Benefit Plan at any time in its sole discretion, subject to the terms of such Employee Benefit Plan and applicable law. During each calendar year the Executive shall be entitled to one paid health-related absence per month of employment during such calendar year, beginning on the Effective Date, but without carryover from calendar year to calendar year. The Executive shall be entitled to 20 days of paid vacation per year beginning with the first day of employment, and he shall accrue one additional day of paid vacation for each year of employment for up to 15 additional days for a total of 35 accrued days. Vacation days must be taken at a time and at intervals mutually convenient to the Company and the Executive. The Executive shall be required to provide notice to the Company at least seven calendar days prior to taking any vacation.

5. Consideration. The Executive acknowledges that the at-will employment and compensation provided pursuant to Section 3 of this Agreement are sufficient and valuable consideration for this Agreement, including the restrictive covenants set forth in Section 7 of this Agreement.

6. Third-party Agreements. The Executive hereby confirms that the Executive is not bound by any agreement with any previous employer or other party that in any way limits, restricts, or would prevent the employment of the Executive by the Company under this Agreement or the full and complete performance by Executive of all his duties and obligations hereunder. The execution of this Agreement by the Executive and the employment of the Executive by the Company under this Agreement will not result in or constitute a breach of any term or condition of any other agreement, instrument, arrangement, or understanding between the Executive and any third party, or constitute (or, with notice or lapse of time, or both, would constitute) a default, breach, or violation of any such agreement, instrument, arrangement, or understanding, or accelerate the maturity of any duty or obligation of the Executive thereunder. In the Executive’s work for the Company, the Executive will not disclose or make use of any information in violation of any agreements with or rights of any such previous employer or other party, and the Executive will not bring to the premises of the Company any copies or other tangible embodiments of non-public information belonging to or obtained from any such previous employment or other party.

7. Restrictive Covenants.

7.1 Confidentiality. In connection with the Executive’s job duties, the Company will provide the Executive with Confidential Information relating to the performance of the Executive’s duties and the operations of the Company and its affiliates. The Executive may receive significant amounts of Confidential Information relating to all areas of the Company’s business, and relating to its affiliates, in the course of performing his duties. For the purposes of this Agreement, “Confidential Information” means, without limitation, all non-public business information of the Company, whether or not marked “confidential,” that constitutes trade secrets or confidential information as construed by applicable law or information that is not already available to the public, all of which the parties hereto agree constitutes trade secrets under the Uniform Trade Secrets Act, the Defend Trade Secrets Act of 2016 of the United States, Directive (EU) 2016/943 of the European Union, and all amendments, successor provisions, and replacements thereto, including, but not limited to, all information relating directly or indirectly to the Company’s business, prospect lists, referral sources, customer lists, and customer information, information concerning services and supplies, marketing programs, computer program and systems, business and supplier contracts, techniques and systems, processes, methods, technologies, business information, financial data, financial plans, products, equipment, sales information, costs data, personnel, product tests, pricing policies, distributorship arrangements, business plans, business strategies, projections, research, employee data, programs, databases, software, financing sources, business models, devices, know-how, and information regarding any acquisition or joint venture arrangements or other enterprises with whom Company has business relationships. The Executive acknowledges that all Confidential Information is a valuable, special, and unique asset of the Company, access to and knowledge of which is essential to the performance of the Executive’s duties hereunder. During the Term and thereafter without limitation of time, the Executive shall hold in strict confidence and shall not, directly or indirectly, disclose or reveal to any person, or use for the Executive’s own personal benefit or for the benefit of anyone else, any Confidential Information, except (i) with the prior written consent of the Company, (ii) in the course of the proper performance of the Executive’s duties hereunder or (iii) as required by applicable law or legal process. Upon voluntary or involuntary termination of the Executive's employment or the Company's request at any time during the Executive's employment, the Executive shall provide or return to the Company any and all Company property including computers, devices, access cards, and all data in any form whatsoever. Nothing in this Agreement shall prohibit the Executive from participating, testifying, or assisting in any investigation, hearing, or other proceeding before any federal, state, or local government agency or pursuant to a lawfully issued subpoena, nor does anything herein preclude or otherwise limit the Executive’s rights and abilities to report matters to, or otherwise participate in, any whistleblower program administered by any such agencies. Executive acknowledges that under the Defend Trade Secrets Act of 2016, 18 U.S.C. § 1836(B), an individual shall not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that is made in confidence to a federal, state, or local government official or to an attorney solely for the purpose of reporting or investigating a suspected violation of law. An individual

shall not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that is made in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal. An individual who files a lawsuit for retaliation by an employer for reporting a suspected violation of law may disclose the trade secret to the attorney of the individual and use the trade secret information in the court proceeding if the individual files any document containing the trade secret under seal and does not disclose the trade secret except pursuant to court order. For the avoidance of doubt, this Section 7 does not prohibit or restrict the Executive (or the Executive’s attorney) from responding to any inquiry about this Agreement or its underlying facts and circumstances by the Securities and Exchange Commission, the Financial Industry Regulatory Authority, or any other self-regulatory organization or governmental authority, or making other disclosures that are protected under the whistleblower provisions of federal law or regulation. The Executive understands and acknowledges that the Executive does not need the prior authorization of the Company to make any such reports or disclosures and that the Executive is not required to notify the Company that the Executive has made such reports or disclosures.

7.2 Noncompetition. The Executive agrees that, during his employment and for a period of two years after the Executive’s employment concludes, the Executive will not, directly or indirectly, whether as director, officer, consultant, principal, employee, agent, or otherwise, engage in or contribute the Executive's knowledge and abilities to any business or entity in competition with the Company’s Business in the Company’s Market Area. For the purposes of this Agreement, “Business” is defined as creating, discovering, developing, licensing, selling, manufacturing, utilizing, and otherwise working with (a) the Company’s polyoxazoline (“POZ”) technology, which includes the synthesis, derivatization, characterization and modification of the raw materials and intermediates of POZ, (b) the attachment and formulation of POZ and POZ derivatives with other materials, including, but not limited to, proteins, peptides, oligonucleotides, biomolecules, small molecules, therapeutic agents, diagnostic agents, imaging agents, implanted devices and equipment, and (c) all methods of making and using each and all of the foregoing. For purposes of this Agreement, “Market Area” is defined as all jurisdictions of the United States and its territories, all countries that touch upon the United States and its territories, all countries in Central America, South America, North America, Europe, Asia, Africa, Australia, Antarctica, and all other countries and jurisdictions of the World.

7.3 Nonsolicitation. The Executive agrees that, during his employment and for a period of 18 months after the Executive’s employment concludes, the Executive will not, directly or indirectly, attempt in any manner to solicit business from any client or customer or persuade any client or customer of the Company to cease doing business or reduce the amount of business that such client or customer has customarily done with the Company.

7.4 No Poach. The Executive agrees that, during his employment and for a period of 18 months after the Executive’s employment concludes, the Executive will not, directly or indirectly, employ or attempt to employ or assist anyone in employing any person who is an employee of the Company or was an employee of the Company during the two-year period prior to the conclusion of Executive’s employment.

7.5 Enforcement. The provisions of this Section 7 shall continue notwithstanding termination of the Executive’s employment for any reason. The Executive agrees that the restrictions and obligations in this Section 7 are reasonable and necessary to protect the goodwill of the Company. If any of the covenants set forth therein are deemed to be invalid or unenforceable based upon the duration or otherwise, the Parties agree that such provisions shall be modified to make them enforceable to the fullest extent permitted by law. In the event of a breach or threatened breach by the Executive of the provisions set forth in this section, the Executive acknowledges that the Company will be irreparably harmed and that monetary damages shall be an insufficient remedy to the Company. Therefore, the Executive consents to enforcement of this paragraph by means of temporary or permanent injunction and other appropriate equitable relief without the posting of bond or security, in any competent court, in addition to any other remedies the Company may have under this Agreement or otherwise. The Executive understands and agrees that, for any period these Section 7 restrictive covenants are violated, the period of restriction shall be tolled and extended by the length of the violation.

8. Inventions and Patents. The Executive and the Company shall enter into that certain Nondisclosure, Noncompetition, Nonsolicitation, and IP Assignment Agreement attached hereto as Exhibit B, and incorporated herein by reference. If there is a conflict between the Nondisclosure, Noncompetition, Nonsolicitation, and IP Assignment Agreement and this Agreement, the provision which provides the Company with the most protection shall govern.

9. Indemnification of Executive by Company. The Executive and the Company shall enter into that certain indemnification agreement attached hereto as Exhibit C, and incorporated herein by reference.

10. Compliance with Section 409A. For purposes of this Agreement, the term “termination of employment” and similar terms relating to the Executive’s termination of employment mean a “separation from service” as that term is defined under Section 409A of the Internal Revenue Code of 1986, as amended, and the final regulations issued thereunder (“Section 409A”). The Parties intend that this Agreement comply in form and operation with the requirements of Section 409A, and this Agreement shall be construed and interpreted in accordance with such intent. To the extent permitted by applicable Department of Treasury/Internal Revenue Service guidance, or law or regulation, the Parties will take reasonable actions to reform this Agreement or any actions taken pursuant to their operation of this Agreement in order to comply with Section 409A. All reimbursements under this Agreement shall be made on or prior to the last day of the taxable year following the taxable year in which the expenses being reimbursed were incurred by Executive, any right to reimbursement or in kind benefits is not subject to liquidation or exchange for another benefit, and no such reimbursement, expenses eligible for reimbursement, or in-kind benefits provided in any taxable year shall in any way affect the expenses eligible for reimbursement, or in-kind benefits to be provided, in any other taxable year. Notwithstanding any other provision of this Agreement, in no event shall the Company be liable for any additional tax, interest, or penalty imposed upon or other detriment suffered by the Executive under Section 409A or for any damages suffered by the Executive for any failure of any provision of this Agreement to be exempt from or to comply with Section 409A.

11. Governing Law; Exclusive Forum; No Jury. This Agreement and the legal relations among the Parties shall be governed by, construed, and enforced in accordance with the laws of the State of Alabama without regard to its conflict of laws rules. The Company and the Executive hereby irrevocably and unconditionally

(i) agree that any action or proceeding arising out of or in connection with this Agreement shall be brought only in the Circuit Courts of Madison County, Alabama or, to the extent such court does not have subject matter jurisdiction, the United States District Court for the Northern District of Alabama sitting in Huntsville, Alabama (the “Alabama Courts”), and not in any other state or federal court in the United States of America or any court in any other country, (ii) consent to submit to the exclusive jurisdiction of the Alabama Courts for purposes of any action or proceeding arising out of or in connection with this Agreement, (iii) waive any objection to the laying of venue of any such action or proceeding in the Alabama Courts, and (iv) waive, and agree not to plead or to make, any claim that any such action or proceeding brought in the Alabama Courts has been brought in an improper or inconvenient forum. Each party agrees that service of process upon such party in any such claim, action, or proceeding shall be effective if notice is given in accordance with the provisions of this Agreement. EACH PARTY HEREBY WAIVES TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY CLAIM, ACTION, OR PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER, OR IN CONNECTION WITH THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY. EACH PARTY (i) CERTIFIES THAT NO REPRESENTATIVE, AGENT, OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING AGREEMENTS, CONSENTS, AND WAIVERS AND (ii) ACKNOWLEDGES THAT IT HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL AGREEMENTS, CONSENTS, AND WAIVERS IN THIS SECTION 10.

12. Entire Agreement; Amendment. This Agreement contains the entire understanding and agreement of the Parties, and supersedes any and all other prior and/or contemporaneous understandings and agreements, either oral or in writing, between the Parties with respect to the subject matter hereof, all of which are merged herein. Each Party to this Agreement acknowledges that no representations, inducements, promises, or agreements, oral or otherwise, have been made by either Party, or anyone acting on behalf of either Party, which are not embodied herein, and that no other agreement, statement, or promise not contained in

this Agreement shall be valid or enforceable. This Agreement may not be modified or amended in any way unless by a written instrument signed by both the Company and the Executive.

13. Assignment. The rights and benefits of the Company under this Agreement shall be transferable, and all the covenants and agreements hereunder shall inure to the benefit of, and be enforceable by or against, its successors and assigns. The duties and obligations of the Executive under this Agreement are personal, and therefore the Executive may not assign or delegate any right or duty under this Agreement without the prior written consent of the Company.

14. Notices. All notices, requests, demands, and other communications provided in connection with this Agreement shall be in writing and shall be deemed to have been duly given at the time when hand delivered, delivered by express courier, or sent by facsimile (with receipt confirmed by the sender’s transmitting device) in accordance with the contact information provided on the signature page hereto or such other contact information as the Parties may have duly provided by notice.

15. Benefits; Binding Effect. This Agreement shall be for the benefit of and binding upon the Parties hereto and their respective heirs, personal representative, legal representatives, succors and, where applicable, assigns, including, without limitation, any successor to the Company; provided, however that the Executive shall not delegate his employment obligations hereunder, or any portion thereof, to any other person.

16. Severability. If any provision of this Agreement is held to be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Agreement shall not in any way be affected or impaired thereby, and the Parties will attempt to agree upon a valid and enforceable provision that is a reasonable substitute therefor, and, upon so agreeing, shall incorporate such substitute provision in this Agreement.

17. Opportunity for Legal Counsel. The Executive acknowledges that he has had full opportunity to review this Agreement and has had access to independent legal counsel of the Executive’s choice to the extent deemed necessary to interpret the legal effect hereof.

18. Section Headings; Construction. The section headings contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. The language used in this Agreement will be deemed to be the language chosen by the Parties to express their mutual intent, and no rules of strict construction will be applied against any Party.

19. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed an original, but all of which taken together shall constitute one and the same the same instrument. Counterparts may be executed manually or electronically (e.g., using DocuSign, SimplyAgree, or similar electronic signature technologies) by electronic transmission methods and shall be deemed an original for all purposes, and a signature to this Agreement that is delivered personally, by mail, express delivery, facsimile, electronic transmission, or otherwise shall be deemed to have been duly and validly delivered for all purposes.

[Signature Page Follows]

IN WITNESS WHEREOF, the parties hereto have caused this Executive Agreement to be duly executed and signed as of the day and year first above written.

EXECUTIVE

By: /s/ Srini Tenjarla

Srini Tenjarla

Contact Information:

SERINA THERAPEUTICS, INC.

By:

Steven Ledger

As its Interim Chief Executive Officer

Contact Information:

601 Genome Way

Suite 2001

Huntsville, AL 35806

IN WITNESS WHEREOF, the parties hereto have caused this Executive Agreement to be duly executed and signed as of the day and year first above written.

EXECUTIVE

Srini Tenjarla

Contact Information:

SERINA THERAPEUTICS, INC.

By: /s/ Steven Ledger

Steven Ledger

As its Interim Chief Executive Officer

Contact Information:

601 Genome Way

Suite 2001

Huntsville, AL 35806

CONFIDENTIAL CONSULTING AGREEMENT

This Confidential Consulting Agreement (the “Agreement”) is executed as of the date shown on the signature page (the “Effective Date”), by and between FLG Partners, LLC, a California limited liability company (“FLG”), and the entity identified on the signature page (“Client”).

RECITALS

WHEREAS, FLG is in the business of providing certain financial services;

WHEREAS, Client wishes to retain FLG to provide and FLG wishes to provide such services to Client on the terms set forth herein;

NOW, THEREFORE, in consideration of the mutual covenants set forth herein, the parties hereto agree as follows:

1. Services.

A. Commencing on the Effective Date, FLG will perform those services (the “Services”) described in one or more exhibits attached hereto. Such services shall be performed by the member or members of FLG identified in Exhibit A (collectively, the “FLG Member”).

B. Client acknowledges and agrees that FLG’s success in performing the Services hereunder will depend upon the participation, cooperation and support of Client’s most senior management.

C. Notwithstanding anything in Exhibit A or elsewhere in this Agreement to the contrary, neither FLG nor any of its members shall serve as an employee, an appointed officer, or an elected director of Client. Consistent with the preceding: (i) Client shall not appoint FLG Member as a corporate officer in Client’s corporate minutes; (ii) Client shall not elect FLG Member to its board of directors or equivalent governing body; and (iii) the FLG Member shall have no authority to sign any documents on behalf of Client, including, but not limited to, federal or state securities filings, tax filings, or representations and warranties on behalf of Client except as pursuant to a specific resolution(s) of Client’s board of directors or equivalent governing body granting such authority to FLG Member as a non-employee consultant to Client.

D. The Services provided by FLG and FLG Member hereunder shall not constitute an audit, attestation, review, compilation, or any other type of financial statement reporting engagement (historical or prospective) that is subject to the rules of the California Board of Accountancy, the AICPA, or other similar state or national licensing or professional bodies. Client agrees that any such services, if required, will be performed separately by its independent public accountants or other qualified consultants.

E. During the term of this Agreement, Client shall not hire or retain the FLG Member as an employee, consultant or independent contractor except pursuant to this Agreement.

2. Compensation; Payment; Deposit; Expenses.

A. As compensation for Services rendered by FLG hereunder, Client shall pay FLG the amounts set forth in Exhibit A for Services performed by FLG hereunder (the “Fees”). The Fees shall be net of any and all taxes, withholdings, duties, customs, bank fees, social contributions or other reductions imposed by any and all authorities which are required to be withheld or collected by Client or FLG, including ad valorem, sales, gross

receipts or similar taxes, but excluding US income taxes based upon FLG’s or FLG Member’s net taxable income.

B. Consistent with common practice in professional services, FLG reserves the right to increase the Fee set forth in Exhibit A no more frequently than annual anniversary of the Effective Date, and no sooner than at least six (6) months from the Effective Date. Notice of any such increase will be made no less than thirty (30) days in advance of such of Fee increase. The only exception is in the event the FLG Member and Client have mutually agreed, in writing, to an increase in fees prior to the dates noted herein.

C. As additional compensation to the FLG Member listed on Exhibit A, Client will grant the FLG Member options set forth in Exhibit A in accordance with the terms of Exhibit A.

D. Client shall pay FLG all amounts owed to FLG under this Agreement upon Client’s receipt of invoice, with no purchase order required. Any invoices more than thirty (30) days overdue will accrue a late payment fee at the rate of one and 50/100 percent (1.5%) per month. FLG shall be entitled to recover all costs and expenses (including, without limitation, attorneys’ fees) incurred by it in collecting any amounts overdue under this Agreement.

E. Client acknowledges that it shall promptly review all invoices submitted by FLG upon receipt. Any dispute related to the accuracy, completeness, or any other aspect of an invoice must be submitted in writing to FLG within fourteen (14) days of receipt of the invoice. Failure to raise a dispute within this timeframe shall be deemed an irrevocable acceptance of the invoice. Notwithstanding the above, in the event of a manifest error or a discrepancy acknowledged by FLG, the parties may mutually agree to extend the dispute resolution period.

F. Client hereby agrees to pay FLG a deposit as set forth on Exhibit A (the “Deposit”) to be held in its entirety as security for Client’s future payment obligations to FLG under this Agreement. Upon termination of this Agreement, all amounts then owing to FLG under this Agreement shall be charged against the Deposit and the balance thereof, if any, shall be refunded to Client. In the event that the total amount of past due unpaid invoices exceeds the amount of the Deposit held by FLG, FLG reserves the right to stop providing services until such time as the outstanding balance is paid in full. FLG shall not be liable for any consequential damages, losses, or claims arising from a work stoppage initiated in accordance with this provision. If outstanding invoices remain unpaid for an extended period, FLG reserves the right to

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CONFIDENTIAL CONSULTING AGREEMENT

terminate the agreement for default, in accordance with the termination provisions outlined in Paragraph 4(C) of this Agreement.

G. Within ten (10) days of Client’s receipt of an expense report from FLG’s personnel performing Services hereunder, Client shall immediately reimburse FLG personnel directly for reasonable travel and out-of-pocket business expenses detailed in such expense report. Any required air travel, overnight accommodation and resulting per diem expenses shall be consistent with Client’s travel & expense policies for Client’s employed executive staff.

3. Relationship of the Parties.

A. FLG’s relationship with Client will be that of an independent contractor and nothing in this Agreement shall be construed to create a partnership, joint venture, or employer-employee relationship. FLG is not the agent of Client and is not authorized to make any presentation, contract, or commitment on behalf of Client unless specifically requested or authorized to do so by Client in writing. FLG agrees that all taxes payable as a result of compensation payable to FLG hereunder shall be FLG’s sole liability. FLG shall defend, indemnify and hold harmless Client, Client’s officers, directors, employees and agents, and the administrators of Client’s benefit plans from and against any claims, liabilities or expenses relating to such taxes or compensation.

4. Term and Termination.

A. The term of this Agreement shall be for the period set forth in Exhibit A.

B. Either party may terminate this Agreement upon thirty (30) calendar days advance written notice to the other party.

C. Either party may terminate this Agreement immediately upon a material breach of this Agreement by the other party and a failure by the other party to cure such breach within ten (10) days of written notice thereof by the non-breaching party to the breaching party.

D. FLG shall have the right to terminate this Agreement immediately without advance written notice (i) if Client is engaged in, or requests that FLG or the FLG Member undertake or ignore any illegal or unethical activity, or (ii) upon the death or disability of the FLG Member.

E. This Agreement shall be deemed terminated if during any six month period no billable hours occur, with the termination date effective on the date of the last billable hour therein.

F. If at any time during this engagement there is a conversion of the FLG Member from 1099 to W2 with Client, then a placement fee shall be immediately payable to FLG. In addition, to the extent within one year of the end of this engagement Client directly hires, employs or retains the FLG Member or any FLG Member either via 1099 or W2, then Client will also immediately pay to FLG a placement fee. The Placement fee paid by Client to FLG will be equal to thirty percent (30%) of FLG Member’s annual base salary including bonus that is agreed to by Client and the FLG Member. Client will not withhold any taxes from any placement fee paid to FLG.

5. Disclosures

A. IRS Circular 230. To ensure compliance with requirements imposed by the IRS effective June 20, 2005, FLG hereby informs Client that any tax advice offered during the course of providing, or arising out of, the Services rendered pursuant to this Agreement, unless expressly stated otherwise, is not intended or written to be used, and cannot be used, for the purpose of: (i) avoiding tax-related penalties under the Internal Revenue Code, or (ii) promoting, marketing or recommending to another party any tax-related matter(s) said tax advice address(es).

B. Attorney-Client Privilege. Privileged communication disclosed to FLG or FLG Member may waive the privilege through no fault of FLG. FLG strongly recommends that Client consult with legal counsel before disclosing privileged information to FLG or FLG Member. Pursuant to Paragraph 6, neither FLG nor FLG Member will be responsible for damages caused through Client’s waiver of privilege, whether deliberate or inadvertent, by disclosing such information to FLG or FLG Member.

6. DISCLAIMERS AND LIMITATION OF LIABILITY.

EXCEPT AS EXPRESSLY SET FORTH HEREIN, ALL SERVICES TO BE PROVIDED BY FLG AND FLG MEMBER (FOR PURPOSES OF THIS PARAGRAPH 6, COLLECTIVELY “FLG”) HEREUNDER ARE PROVIDED “AS IS” WITHOUT ANY WARRANTY WHATSOEVER. CLIENT RECOGNIZES THAT THE “AS IS” CLAUSE OF THIS AGREEMENT IS AN IMPORTANT PART OF THE BASIS OF THIS AGREEMENT, WITHOUT WHICH FLG WOULD NOT HAVE AGREED TO ENTER INTO THIS AGREEMENT. FLG EXPRESSLY DISCLAIMS ALL OTHER WARRANTIES, TERMS OR CONDITIONS, WHETHER EXPRESS, IMPLIED, OR STATUTORY, REGARDING THE PROFESSIONAL SERVICES, INCLUDING ANY, WARRANTIES OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE AND INFRINGEMENT. NO REPRESENTATION OR OTHER AFFIRMATION OF FACT REGARDING THE SERVICES PROVIDED HEREUNDER SHALL BE DEEMED A WARRANTY FOR ANY PURPOSE OR GIVE RISE TO ANY LIABILITY OF FLG WHATSOEVER.

IN NO EVENT SHALL FLG BE LIABLE FOR ANY INCIDENTAL, INDIRECT, EXEMPLARY, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES, UNDER ANY CIRCUMSTANCES, INCLUDING, BUT NOT LIMITED TO: LOST PROFITS; REVENUE OR SAVINGS; WAIVER BY CLIENT, WHETHER INADVERTENT OR INTENTIONAL, OF CLIENT’S ATTORNEY-CLIENT PRIVILEGE THROUGH CLIENT’S DISCLOSURE OF LEGALLY PRIVILEGED INFORMATION TO FLG; OR THE LOSS, THEFT, TRANSMISSION OR USE, AUTHORIZED OR OTHERWISE, OF ANY DATA, EVEN IF CLIENT OR FLG HAVE BEEN ADVISED OF, KNEW, OR SHOULD HAVE KNOWN, OF THE POSSIBILITY THEREOF. NOTWITHSTANDING ANYTHING IN THIS AGREEMENT TO THE CONTRARY, FLG’S AGGREGATE CUMULATIVE LIABILITY HEREUNDER, WHETHER IN CONTRACT, TORT, NEGLIGENCE, MISREPRESENTATION, STRICT LIABILITY OR OTHERWISE, SHALL NOT EXCEED AN AMOUNT EQUAL TO THE LAST TWO (2) MONTHS OF FEES PAYABLE BY CLIENT UNDER PARAGRAPH 2(A) OF

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CONFIDENTIAL CONSULTING AGREEMENT

THIS AGREEMENT. CLIENT ACKNOWLEDGES THAT THE COMPENSATION PAID BY IT UNDER THIS AGREEMENT REFLECTS THE ALLOCATION OF RISK SET FORTH IN THIS AGREEMENT AND THAT FLG WOULD NOT ENTER INTO THIS AGREEMENT WITHOUT THESE LIMITATIONS ON ITS LIABILITY. THIS PARAGRAPH SHALL NOT APPLY TO EITHER PARTY WITH RESPECT TO A BREACH OF ITS CONFIDENTIALITY OBLIGATIONS.

A. As a condition for recovery of any amount by Client against FLG, Client shall give FLG written notice of the alleged basis for liability within ninety (90) days of discovering the circumstances giving rise thereto, in order that FLG will have the opportunity to investigate in a timely manner and, where possible, correct or rectify the alleged basis for liability; provided that the failure of Client to give such notice will only affect the rights of Client to the extent that FLG is actually prejudiced by such failure. Notwithstanding anything herein to the contrary, Client must assert any claim against FLG by the sooner of: (i) ninety (90) days after discovery; (ii) ninety (90) days after the termination of this Agreement; (iii) ninety (90) days after the last date on which the Services were performed; or, (iv) sixty (60) days after completion of a financial or accounting audit for the period(s) to which a claim pertains.

7. Indemnification.

A. FLG and FLG Member acting in relation to any of the affairs of Client shall, to the fullest extent permitted by law, as now or hereafter in effect, be indemnified and held harmless, and such right to indemnification shall continue to apply to FLG and FLG Member following the term of this Agreement out of the assets and profits of the Client from and against all actions, costs, charges, losses, damages, liabilities and expenses which FLG or FLG Member, or FLG’s or FLG Member’s heirs, executors or administrators, shall or may incur or sustain by or by reason for any act done, concurred in or omitted in or about the execution of FLG’s or FLG Member’s duty or services performed on behalf of Client; and Client shall advance the reasonable attorney’s fees, costs and expenses incurred by FLG or FLG’s Member in connection with litigation related to the foregoing on the same basis as such advancement would be available to the Client’s officers and directors, PROVIDED THAT Client shall not be obligated to make payments to or on behalf of any person (i) in connection with services provided by such person outside the scope of Services contemplated by this Agreement, and not authorized or consented to by Client’s CEO or Board of Directors, or (ii) in respect of any (a) gross negligence or willful misconduct of such person, or (b) negligence of such person, but only to the extent that FLG’s errors and omissions liability insurance would cover such person for such negligence without regard to Client’s obligation to indemnify FLG hereunder.

B. FLG and FLG Member shall have no liability to Client relating to the performance of its duties under this Agreement except in the event of FLG’s or FLG Member’s gross negligence or willful misconduct.

C. FLG and FLG Member agree to waive any claim or right of action FLG or FLG Member might have whether individually or by or in the right of Client, against any director, secretary and other officers of Client and the liquidator or trustees (if any) acting in relation to any of the affairs of Client and every one of them on account of any action taken by such director, officer,

liquidator or trustee or the failure of such director, officer, liquidator or trustee to take any action in the performance of his duties with or for Client; PROVIDED THAT such waiver shall not extend to any matter in respect of any gross negligence or willful misconduct which may attach to any such persons.

8. Representations and Warranties.

A. Each party represents and warrants to the other that it is authorized to enter into this Agreement and can fulfill all of its obligations hereunder.

B. FLG and FLG Member warrant that they shall perform the Services diligently, with due care, and in accordance with prevailing industry standards for comparable engagements and the requirements of this Agreement. FLG and FLG Member warrant that FLG Member has sufficient professional experience to perform the Services in a timely and competent manner.

C. Each party represents and warrants that it has and will maintain a policy or policies of insurance with reputable insurance companies providing the members, officers and directors, as the case may be, of itself with coverage for losses from wrongful acts. FLG covenants that it has an error and omissions insurance policy in place in the form provided to Client prior to or contemporaneously with the date of execution of this Agreement and will continue to maintain such policy or equivalent policy provided that such policy or equivalent policy shall be available at commercially reasonable rates.

9. Work Product License.

The parties do not anticipate that FLG or FLG Member will create any intellectual property for Client in performing the Services pursuant to this Agreement. However, FLG and FLG Member grant to Client a world-wide, perpetual, exclusive, royalty-free, irrevocable license to use and create derivative works from all tangible and electronic documents, spreadsheets, and financial models (collectively, “Work Product”) produced or authored by FLG Member in the course of performing the Services pursuant to this Agreement. Any patent rights arising out of the Services will be assigned to and owned by Client and not FLG or FLG Member. All other rights, including, but not limited to, the residual memory of any methods, discoveries, developments, improvements, know-how, ideas, insights, analytical concepts and skills directly inherent to, or reasonably required for, the competent execution of FLG Member’s profession as a chief financial officer are reserved in their entirety by FLG and FLG Member.

10. Miscellaneous.

A. Any notice required or permitted to be given by either party hereto under this Agreement shall be in writing and shall be personally delivered or sent by a reputable courier mail service (e.g., Federal Express) or by facsimile or email transmission confirmed by reputable courier mail service, to the other party as set forth in this Paragraph 10(A). Notices will be deemed effective two (2) days after deposit with a reputable courier service or upon confirmation of receipt by the recipient from such courier service or the same day if sent by facsimile or email transmission and confirmed as set forth above.

If to FLG:

U. Heather Ogan

FLG Partners, LLC

228 Hamilton Ave., 3rd Floor,

Initial: Client _/s/ SL____ FLG _/s/ UHO____ Page 3 of #NUM_PAGES#

CONFIDENTIAL CONSULTING AGREEMENT

Palo Alto, CA 94301

PO BOX 192304

San Francisco, CA 94119

Tel: 415-508-4048, ext 201

Fax: 415-508-6896

E-mail: accounting@flgpartners.com

If to Client: the address, telephone numbers and email address shown below Client’s signature on the signature page.

B. This Agreement will be governed by and construed in accordance with the laws of California without giving effect to any choice of law principles that would require the application of the laws of a different jurisdiction.

C. Any claim, dispute, or controversy of whatever nature arising out of or relating to this Agreement (including any other agreement(s) contemplated hereunder), including, without limitation, any action or claim based on tort, contract, or statute (including any claims of breach or violation of statutory or common law protections from discrimination, harassment and hostile working environment), or concerning the interpretation, effect, termination, validity, performance and/or breach of this Agreement (“Claim”), shall be resolved by final and binding arbitration before a single arbitrator (“Arbitrator”) selected from and administered by the San Francisco office of JAMS (the “Administrator”) in accordance with its then existing commercial arbitration rules and procedures. The arbitration shall be held in San Francisco, California. The Arbitrator shall, within fifteen (15) calendar days after the conclusion of the Arbitration hearing, issue a written award and statement of decision describing the essential findings and conclusions on which the award is based, including the calculation of any damages awarded. The Arbitrator also shall be authorized to grant any temporary, preliminary or permanent equitable remedy or relief he or she deems just and equitable and within the scope of this Agreement, including, without limitation, an injunction or order for specific performance. Each party shall bear its own attorneys’ fees, costs, and disbursements arising out of the arbitration, and shall pay an equal share of the fees and costs of the Administrator and the Arbitrator; provided, however, the Arbitrator shall be authorized to determine whether a party is the prevailing party, and if so, to award to that prevailing party reimbursement for its reasonable attorneys’ fees, costs and disbursements, and/or the fees and costs of the Administrator and the Arbitrator. The Arbitrator's award may be enforced in any court of competent jurisdiction. Notwithstanding the foregoing, nothing in this Paragraph 10(C) will restrict either party from applying to any court of competent jurisdiction for injunctive relief.

D. Neither party may assign its rights or delegate its obligations hereunder, either in whole or in part, whether by operation of law or otherwise, without the prior written consent of the other party; provided, however, that FLG may assign its rights and delegate its obligations hereunder to any affiliate of FLG. The rights and liabilities of the parties under this Agreement will bind and inure to the benefit of the parties’ respective successors and permitted assigns.

E. If any provision of this Agreement, or the application thereof, shall for any reason and to any extent be invalid or unenforceable, the remainder of this Agreement and application of such provision to other persons or circumstances shall be interpreted so as best to reasonably effect the intent of the parties. The parties

further agree to replace such void or unenforceable provision of this Agreement with a valid and enforceable provision that will achieve, to the extent possible, the economic, business and other purposes of the void or unenforceable provision.

F. This Agreement, the Exhibits, and any executed Non-Disclosure Agreements specified herein and thus incorporated by reference constitute the entire understanding and agreement of the parties with respect to the subject matter hereof and thereof and supersede all prior and contemporaneous agreements or understandings, express or implied, written or oral, between the parties with respect hereto. The express terms hereof control and supersede any course of performance or usage of the trade inconsistent with any of the terms hereof.

G. Any term or provision of this Agreement may be amended, and the observance of any term of this Agreement may be waived, only by a writing signed by the parties. The waiver by a party of any breach hereof for default in payment of any amount due hereunder or default in the performance hereof shall not be deemed to constitute a waiver of any other default or succeeding breach or default.

H. Upon completion of the engagement hereunder FLG may place customary “tombstone” advertisements using Client’s logo and name in publications of FLG’s choice at its own expense, and/or cite the engagement in similar fashion on FLG’s website.

I. If Client discloses FLG Member’s name on Client’s website (such as in an executive biography, for example), press releases, SEC filings and other public documents and media, then Client shall include in the description of FLG Member a sentence substantially the same as “[FLG Member] is also a partner at FLG Partners, a leading CFO services firm in Silicon Valley.”

J. If and to the extent that a party’s performance of any of its obligations pursuant to this Agreement is prevented, hindered or delayed by fire, flood, earthquake, elements of nature or acts of God, acts of war, terrorism, riots, civil disorders, rebellions or revolutions, or any other similar cause beyond the reasonable control of such party (each, a “Force Majeure Event”), and such non-performance, hindrance or delay could not have been prevented by reasonable precautions of the non-performing party, then the non-performing, hindered or delayed party shall be excused for such non-performance, hindrance or delay, as applicable, of those obligations affected by the Force Majeure Event for as long as such Force Majeure Event continues and such party continues to use its best efforts to recommence performance whenever and to whatever extent possible without delay, including through the use of alternate sources, workaround plans or other means.

K. This Agreement may be executed in any number of counterparts and by the parties on separate counterparts, each of which when executed and delivered shall constitute an original, but all the counterparts together constitute one and the same instrument.

L. This Agreement may be executed by facsimile signatures (including electronic versions of this document in Adobe Acrobat Portable Document Format form which contain scanned or secure, digitally signed signatures) by any party hereto and such signatures shall be deemed binding for all purposes hereof, without delivery of an original signature being thereafter required.

Initial: Client _/s/ SL____ FLG _/s/ UHO____ Page 4 of #NUM_PAGES#

CONFIDENTIAL CONSULTING AGREEMENT

M. Survivability. The following Paragraphs shall survive the termination of this Agreement: 6 (“Disclaimers and Limitation of Liability”); 7 (“Indemnification”); 8 (“Representations and Warranties”); 9 (“Work Product License”); and 10 (“Miscellaneous”).

REMAINDER OF THIS PAGE LEFT BLANK

Initial: Client _/s/ SL____ FLG _/s/ UHO____ Page 5 of #NUM_PAGES#

CONFIDENTIAL CONSULTING AGREEMENT

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the Effective Date.


CLIENT: Serina Therapeutics (DE), Inc., a Delaware corporation. By: Steven Ledger Signed: /s/ Steve Ledger Title: Interim CEO Address:601 Genome Way, Suite 2001 Huntsville, AL 35806 Tel: (415) 505-7721 Email: sledger@serinatherapeutics.com			FLG: FLG Partners, LLC, a California limited liability company. By: U. Heather Ogan Signed: /s/ U. Heather Ogan Title: Administrative Partner Effective Date: May 31, 2024.

REMAINDER OF THIS PAGE LEFT BLANK

Initial: Client _/s/ SL____ FLG _/s/ UHO____ Page 6 of #NUM_PAGES#

Exhibit 31

CERTIFICATION

I, Steve Ledger, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Serina Therapeutics, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rule 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this periodic report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


Date: November 12, 2024

/s/ Steve Ledger
Steve Ledger
Chief Executive Officer

Exhibit 31

CERTIFICATION

I, Gregory S. Curhan, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Serina Therapeutics, Inc.;

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


Date: November 12, 2024

/s/ Gregory S. Curhan
Gregory S. Curhan
Chief Financial Officer

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Serina Therapeutics, Inc. (the “Company”) for the quarter ended September 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Steve Ledger, Chief Executive Officer, and Gregory S. Curhan, Chief Financial Officer, of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


Date: November 12, 2024

/s/ Steve Ledger
Steve Ledger
Chief Executive Officer

/s/ Gregory S. Curhan
Gregory S. Curhan
Chief Financial Officer

Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2024	Nov. 07, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	1-38519
Entity Registrant Name	Serina Therapeutics, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-1436829
Entity Address, Address Line One	601 Genome Way
Entity Address, Address Line Two	Suite 2001
Entity Address, City or Town	Huntsville
Entity Address, State or Province	AL
Entity Address, Postal Zip Code	35806
City Area Code	(256)
Local Phone Number	327-9630
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	SER
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		8,891,976
Entity Central Index Key	0001708599
Amendment Flag	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 3,185	$ 7,619
Grant receivable	14	0
Prepaid expenses and other current assets	2,224	0
Total current assets	5,423	7,619
Restricted cash	50	0
Property and equipment, net	519	573
Right of use assets - operating leases	509	666
Right of use assets - finance leases	92	110
Intangible assets, net	509	0
Other long-term prepaid assets	333	0
TOTAL ASSETS	7,435	8,968
Current liabilities:
Accounts payable	1,695	580
Accrued expenses	1,159	583
Loans due to Juvenescence, net of debt issuance costs	10,462	0
Other current liabilities	198	250
Total current liabilities	13,514	1,413
Warrant liability	6,744	0
Loans due to Juvenescence, net of current portion	693	0
Convertible promissory notes, at fair value	0	2,983
Operating lease liabilities, net of current portion	312	461
Finance lease liabilities, net of current portion	0	1
TOTAL LIABILITIES	21,263	4,858
Commitments and contingencies (Note 11)
Redeemable convertible preferred stock:
Redeemable convertible preferred stock, $0.01 par value; 10,000 authorized; none and 3,438 issued and outstanding at September 30, 2024 and December 31, 2023, respectively; Liquidation preference of none and $36,982 at September 30, 2024 and December 31, 2023, respectively	0	36,404
Stockholders’ deficit:
Preferred stock, $0.0001 par value, 5,000 shares authorized; none issued and outstanding at September 30, 2024 and December 31, 2023, respectively;	0	0
Common stock, $0.0001 par value, 40,000 shares authorized; and 8,892 and 2,410 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively;	1	25
Additional paid-in capital	8,000	858
Accumulated deficit	(21,775)	(33,177)
Total Serina Therapeutics, Inc. stockholders’ deficit	(13,774)	(32,294)
Noncontrolling interest	(54)	0
Total stockholders’ deficit	(13,828)	(32,294)
TOTAL LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, AND STOCKHOLDERS’ DEFICIT	$ 7,435	$ 8,968

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Temporary equity, par or stated value per share (in usd per share)	$ 0.01	$ 0.01
Temporary equity, shares authorized (in shares)	10,000,000	10,000,000
Temporary equity, shares issued (in shares)	0	3,438,000
Temporary equity, shares outstanding (in shares)	0	3,438,000
Liquidation Preference	$ 0	$ 36,982
Preferred stock, par or stated value per share (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding( in shares )	0	0
Common stock, par or stated value per share (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares, issued (in shares)	8,892,000	2,410,000
Common stock, shares, outstanding (in shares)	8,892,000	2,410,000

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
REVENUES
Total revenues	$ 14	$ 29	$ 70	$ 66
OPERATING EXPENSES
Research and development	2,415	603	5,115	1,481
General and administrative	2,911	889	6,454	1,955
Total operating expenses	5,326	1,492	11,569	3,436
Loss from operations	(5,312)	(1,463)	(11,499)	(3,370)
OTHER INCOME (EXPENSE), NET
Interest expense	(16)	(100)	(509)	(382)
Fair value inception adjustment on convertible promissory note	0	0	0	2,240
Change in fair value of convertible promissory notes	0	2,614	(7,017)	4,477
Change in fair value of warrants	6,669	596	10,385	1,059
Other income, net	42	105	185	194
Total other income, net	6,695	3,215	3,044	7,588
NET INCOME (LOSS)	1,383	1,752	(8,455)	4,218
Net loss attributable to noncontrolling interest	27	0	54	0
NET INCOME (LOSS) ATTRIBUTABLE TO SERINA THERAPEUTICS, INC.	$ 1,410	$ 1,752	$ (8,401)	$ 4,218
NET EARNINGS (LOSS) PER COMMON SHARE:
BASIC (in usd per share)	$ 0.16	$ 0.80	$ (1.24)	$ 1.94
DILUTED (in usd per share)	$ 0.13	$ 0.23	$ (1.24)	$ 0.57
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING:
BASIC (in shares)	8,851	2,190	6,774	2,176
DILUTED (in shares)	10,751	7,584	6,774	7,548
Grant revenues
REVENUES
Total revenues	$ 14	$ 29	$ 70	$ 66

Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2022	3,323,000
Beginning balance at Dec. 31, 2022	$ 35,442
Ending balance (in shares) at Mar. 31, 2023	3,323,000
Ending balance at Mar. 31, 2023	$ 35,442
Beginning balance at Dec. 31, 2022	(37,778)	$ 22	$ 646	$ (38,446)
Beginning balance (in shares) at Dec. 31, 2022		2,167,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	2		2
Net income (loss)	1,658			1,658
Ending balance at Mar. 31, 2023	$ (36,118)	$ 22	648	(36,788)
Ending balance (in shares) at Mar. 31, 2023		2,167,000
Beginning balance (in shares) at Dec. 31, 2022	3,323,000
Beginning balance at Dec. 31, 2022	$ 35,442
Ending balance (in shares) at Sep. 30, 2023	3,438,000
Ending balance at Sep. 30, 2023	$ 36,404
Beginning balance at Dec. 31, 2022	(37,778)	$ 22	646	(38,446)
Beginning balance (in shares) at Dec. 31, 2022		2,167,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,218
Ending balance at Sep. 30, 2023	$ (33,346)	$ 24	858	(34,228)
Ending balance (in shares) at Sep. 30, 2023		2,410,000
Beginning balance (in shares) at Mar. 31, 2023	3,323,000
Beginning balance at Mar. 31, 2023	$ 35,442
Ending balance (in shares) at Jun. 30, 2023	3,323,000
Ending balance at Jun. 30, 2023	$ 35,442
Beginning balance at Mar. 31, 2023	(36,118)	$ 22	648	(36,788)
Beginning balance (in shares) at Mar. 31, 2023		2,167,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		15,000
Issuance of common stock upon exercise of stock options	1		1
Stock-based compensation	23		23
Net income (loss)	808			808
Ending balance at Jun. 30, 2023	$ (35,286)	$ 22	672	(35,980)
Ending balance (in shares) at Jun. 30, 2023		2,182,000
Redeemable Preferred Stock
Issuance of common stock upon conversion of preferred stock (in shares)	(115,000)
Issuance of common stock upon conversion of preferred stock	$ (962)
Ending balance (in shares) at Sep. 30, 2023	3,438,000
Ending balance at Sep. 30, 2023	$ 36,404
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		228,000
Issuance of common stock upon exercise of stock options	13	$ 2	11
Issuance of common stock upon conversion of AgeX-Serina Note	175		175
Net income (loss)	1,752			1,752
Ending balance at Sep. 30, 2023	$ (33,346)	$ 24	858	(34,228)
Ending balance (in shares) at Sep. 30, 2023		2,410,000
Beginning balance (in shares) at Dec. 31, 2023	3,438,000
Beginning balance at Dec. 31, 2023	$ 36,404
Redeemable Preferred Stock
Issuance of common stock upon conversion of preferred stock (in shares)	(3,438,000)
Issuance of common stock upon conversion of preferred stock	$ (36,404)
Ending balance (in shares) at Mar. 31, 2024	0
Ending balance at Mar. 31, 2024	$ 0
Beginning balance at Dec. 31, 2023	(32,294)	$ 25	858	(33,177)	$ 0
Beginning balance (in shares) at Dec. 31, 2023		2,410,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		64,000
Issuance of common stock upon exercise of stock options	4	$ 1	3
Issuance of common stock upon conversion of preferred stock (in shares)		3,438,000
Issuance of common stock upon conversion of preferred stock	36,404	$ 35	36,369
Issuance of common stock upon conversion of AgeX-Serina Note (in shares)		616,000
Issuance of common stock upon conversion of AgeX-Serina Note	10,721	$ 6	10,715
Cancellation of common stock upon consummation of Merger on March 26, 2024 (in shares)		(6,528,000)
Cancellation of common stock upon consummation of Merger on March 26, 2024	(10,721)	$ (67)	(47,833)	37,179
Merger and issuance of common stock to Legacy Serina shareholders upon consummation of Merger on March 26, 2024 (in shares)		8,414,000
Merger and issuance of common stock to Legacy Serina shareholders upon consummation of Merger on March 26, 2024	961	$ 1	960
Stock-based compensation	53		53
Net income (loss)	(15,015)			(15,015)
Ending balance at Mar. 31, 2024	$ (28,388)	$ 1	0	(28,389)	0
Ending balance (in shares) at Mar. 31, 2024		8,414,000
Beginning balance (in shares) at Dec. 31, 2023	3,438,000
Beginning balance at Dec. 31, 2023	$ 36,404
Ending balance (in shares) at Sep. 30, 2024	0
Ending balance at Sep. 30, 2024	$ 0
Beginning balance at Dec. 31, 2023	$ (32,294)	$ 25	858	(33,177)	0
Beginning balance (in shares) at Dec. 31, 2023		2,410,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	164,000
Merger and issuance of common stock to Legacy Serina shareholders upon consummation of Merger on March 26, 2024 (in shares)	5,913,277
Net income (loss)	$ (8,455)
Ending balance at Sep. 30, 2024	$ (13,828)	$ 1	8,000	(21,775)	(54)
Ending balance (in shares) at Sep. 30, 2024		8,892,000
Beginning balance (in shares) at Mar. 31, 2024	0
Beginning balance at Mar. 31, 2024	$ 0
Ending balance (in shares) at Jun. 30, 2024	0
Ending balance at Jun. 30, 2024	$ 0
Beginning balance at Mar. 31, 2024	(28,388)	$ 1	0	(28,389)	0
Beginning balance (in shares) at Mar. 31, 2024		8,414,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Deemed dividend from issuance of warrants	(18,501)		(1,125)	(17,376)
Issuance of common stock upon exercise of Post-Merger Warrants (in shares)		378,000
Issuance of common stock upon exercise of Post-Merger Warrants	6,360		6,360
Stock-based compensation	458		458
Transactions with noncontrolling interests	0		3		(3)
Net income (loss)	5,177			5,204	(27)
Ending balance at Jun. 30, 2024	$ (16,393)	$ 1	6,821	(23,185)	(30)
Ending balance (in shares) at Jun. 30, 2024		8,792,000
Ending balance (in shares) at Sep. 30, 2024	0
Ending balance at Sep. 30, 2024	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		100,000
Issuance of common stock upon exercise of stock options	86		86
Stock-based compensation	1,096		1,096
Transactions with noncontrolling interests	0		(3)		3
Net income (loss)	1,383			1,410	(27)
Ending balance at Sep. 30, 2024	$ (13,828)	$ 1	$ 8,000	$ (21,775)	$ (54)
Ending balance (in shares) at Sep. 30, 2024		8,892,000

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES:
Net income (loss)	$ (8,455)	$ 4,218
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	138	84
Non-cash lease expense	174	139
Non-cash interest expense on convertible promissory note	163	382
Amortization of debt issuance costs	337	0
Stock-based compensation	1,607	25
Fair value inception adjustment on convertible promissory note	0	(2,240)
Change in fair value of convertible promissory notes	7,017	(4,477)
Change in fair value of warrants	(10,385)	(1,059)
Changes in operating assets and liabilities:
Grant receivable	51	0
Prepaid expenses and other current assets	(2,449)	2
Accounts payable	(712)	523
Accrued expenses	132	(62)
Operating lease liabilities	(166)	(132)
Net cash used in operating activities	(12,548)	(2,597)
INVESTING ACTIVITIES:
Purchase of equipment	(17)	(434)
Net cash used in investing activities	(17)	(434)
FINANCING ACTIVITIES:
Drawdown on loan facilities from Juvenescence	2,933	0
Cash and restricted cash acquired in connection with the Merger	337	0
Proceeds from the exercise of stock options	90	15
Proceeds from the exercise of Post-Merger Warrants by Juvenescence	4,988	0
Proceeds from the issuance of convertible promissory notes	0	10,100
Principal repayment on loan facilities to Juvenescence	(133)	0
Principal repayments on finance lease liabilities	(34)	(35)
Net cash provided by financing activities	8,181	10,080
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(4,384)	7,049
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
At beginning of the period	7,619	532
At end of the period	3,235	7,581
SUPPLEMENTAL DISCLOSURES
Cash paid for interest	2	4
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING AND INVESTING ACTIVITIES:
Right of use asset acquired in exchange for operating lease liabilities	0	672
Issuance of common stock upon conversion of Preferred Stock	36,404	0
Issuance of common stock upon conversion of AgeX-Serina Note	10,721	0
Merger and issuance of common stock upon consummation of Merger on March 26, 2024	961	0
Deemed dividend from issuance of warrants	$ 1,125	$ 0

Organization, Business Overview and Liquidity	9 Months Ended
Organization, Business Overview and Liquidity	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Business Overview and Liquidity	Organization, Business Overview and Liquidity Serina Therapeutics, Inc. (“Serina” or the “Company”) was incorporated as AgeX Therapeutics, Inc. in January 2017 in the state of Delaware. On March 26, 2024, AgeX Therapeutics, Inc. (“AgeX”) completed a merger transaction in accordance with the terms and conditions of the Agreement and Plan of Merger and Reorganization, dated as of August 29, 2023 (the “Merger Agreement”), by and among AgeX, Canaria Transaction Corporation, an Alabama corporation and a wholly owned subsidiary of AgeX (“Merger Sub”), and Serina Therapeutics, Inc., an Alabama corporation (“Legacy Serina”), pursuant to which Merger Sub merged with and into Legacy Serina, with Legacy Serina surviving the merger as a wholly owned subsidiary of AgeX (the “Merger”). Additionally, on March 26, 2024, AgeX changed its name from “AgeX Therapeutics, Inc.” to “Serina Therapeutics, Inc.” (the “Company”). At the effective time of the Merger, each outstanding share of Legacy Serina capital stock (after giving effect to the automatic conversion of all shares of Legacy Serina preferred stock into shares of Legacy Serina common stock and excluding any shares held as treasury stock by Legacy Serina or held or owned by AgeX or any subsidiary of AgeX or of Legacy Serina and any dissenting shares) was converted into the right to receive 0.97682654 shares of AgeX common stock, which resulted in AgeX issuing an aggregate of 5,913,277 shares of AgeX common stock to the stockholders of Legacy Serina. In addition, AgeX assumed the Legacy Serina 2017 Stock Option Plan, and each outstanding and unexercised option to purchase Legacy Serina common stock and each outstanding and unexercised warrant to purchase Legacy Serina capital stock was adjusted with such stock options and warrants henceforth representing the right to purchase a number of shares of Company common stock equal to 0.97682654 multiplied by the number of shares of Legacy Serina common stock previously represented by such options and warrants. Following the consummation of the Merger, the business previously conducted by Legacy Serina became the business conducted by the Company, which is now a clinical-stage biotechnology company developing Legacy Serina’s drug product candidates. The Company’s headquarters are located in Huntsville, Alabama (Legacy Serina’s headquarters). The Company is a clinical-stage biotechnology company developing a pipeline of wholly-owned drug product candidates to treat neurological diseases and pain. The Company’s POZ drug delivery technology is designed to enable certain existing drugs and novel drug candidates to be modified in a way that may provide an increase in efficacy and safety of the resulting polymeric drug conjugate. The Company’s proprietary POZ technology is based on a synthetic, water soluble, low viscosity polymer called poly(2-oxazoline). The Company’s POZ technology is engineered to provide greater control in drug loading and more precision in the rate of release of attached drugs delivered via subcutaneous injection. The therapeutic agents in the Company’s product candidates are typically well-understood and marketed drugs that are effective but are limited by pharmacokinetic (PK) profiles that can include toxicity, side effects and short half-life. The Company believes that by using POZ technology, drugs with narrow therapeutic windows can be designed to maintain more desirable and stable levels in the blood. The Company believes that POZ technology can be applied to small molecules, proteins, antibody drug conjugates, and other classes of molecules. Prior to the closing of the Merger, any assets of AgeX other than certain “Legacy Assets” were transferred into a recently formed subsidiary of AgeX, UniverXome Bioengineering, Inc. (“UniverXome”). UniverXome assumed (i) any outstanding indebtedness of AgeX to Juvenescence Limited (“Juvenescence”), which was secured by the assets contributed to UniverXome, (ii) most of the Company’s contracts with third parties, other than certain designated contracts and any contracts that were terminated before the Merger, and (iii) all other liabilities of the Company in existence as of the effective time of the Merger (other than certain transaction expenses related to the Merger). Liquidity and Going Concern In addition to general economic and capital market trends and conditions, the Company’s ability to raise sufficient additional capital to finance its operations from time to time will depend on a number of factors specific to the Company’s operations such as operating expenses and progress in out-licensing its technologies and development of its product candidates. The unavailability or inadequacy of financing to meet future capital needs could force the Company to modify, curtail, delay, or suspend some or all aspects of planned operations. Sales of additional equity securities could result in the dilution of the interests of its stockholders. The Company cannot assure that adequate financing will be available on favorable terms, if at all. The Company recognized net loss of $8.5 million for the nine months ended September 30, 2024. The Company used $12.5 million in net cash from operating activities for the period ended September 30, 2024 and has historically incurred losses from operations and expects to continue to generate negative cash flows as the Company implements its business plan. Management believes that its cash and cash equivalents of $3.2 million as of September 30, 2024, along with the $10 million of cash proceeds expected to be received from Juvenescence through the exercise of Juvenescence’s remaining Post-Merger Warrants as provided in a “Side Letter”, will be used to fund Company operations but are not expected to be sufficient to satisfy the Company’s anticipated operating and other funding requirements for the twelve months from the issuance of these condensed consolidated interim financial statements. See Note 7, Stockholders’ Equity/(Deficit) regarding the Post-Merger Warrants and Side Letter. Management has based its estimate of the funds needed to finance Company operations on assumptions that may prove to be wrong, and available capital resources could be exhausted sooner than expected. As such, there is substantial doubt about the Company’s ability to continue as a going concern. The Company is subject to risks and uncertainties common to early-stage companies in the biotechnology industry, including, but not limited to, technical risks associated with the successful research, development and manufacturing of therapeutic candidates, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations, and the ability to secure additional capital to fund operations. Therapeutic drug candidates currently under development will require significant additional research and development efforts, including extensive preclinical and clinical testing and regulatory approval prior to commercialization. These efforts will require significant amounts of additional capital, adequate personnel, and infrastructure. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize revenue from product sales. The Company expects to largely rely on raising capital from equity investors for funding its operations. Some funding is expected to be obtained through licensing agreements or other arrangements with commercial entities. As a result of recurring losses from operations and recurring negative cash flows from operations, there is substantial doubt regarding the Company’s ability to maintain liquidity sufficient to operate its business effectively. If sufficient capital is not available, the Company would be required to delay, limit, reduce, or terminate its product development or future commercialization efforts or grant rights to develop and market therapeutic candidates to other entities. There can be no assurance that the Company will be able to raise additional funds or that the terms and conditions of any future financings will be workable or acceptable to the Company or its shareholders. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classifications of liabilities that might be necessary should the Company be unable to continue as a going concern.

Basis of Presentation and Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2024

Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

condition and results of operations. The condensed consolidated results of operations are not necessarily indicative of the results to be expected for any other interim period or for the entire year.

Principles of consolidation

Financial Statement Reclassification

Use of estimates

Concentration of credit risk and other risks and uncertainties

Fair value measurements of financial instruments

The three levels of inputs that may be used to measure fair value are as follows:

•Level 1: Quoted prices in active markets for identical assets or liabilities.

Accounting for warrants

Redeemable convertible preferred stock

Cash, cash equivalents, and restricted cash


	September 30, 2024		December 31, 2023
Cash and cash equivalents	$	3,185	$	7,619
Restricted cash (1)	50		—
Cash, cash equivalents, and restricted cash as shown in the condensed consolidated statements of cash flows	$	3,235	$	7,619

(1)Restricted cash entirely represents the deposit required to maintain the Company’s corporate credit card program.

Property and equipment, net

Leases

Intangible assets, net

Impairment of long-lived assets

Grant revenues

The Company believes the recognition of revenue as costs are incurred and amounts become realizable is analogous to the concept of transfer of control of a service over time under ASC 606.

Grant revenues for the three and nine months ended September 30, 2024 and 2023 were not material.

Research and development

General and administrative

Income taxes

Stock-based Compensation Expense

Basic and diluted net earnings (loss) per share attributable to common stockholders

Segment reporting

Recently adopted accounting pronouncements

Recently Issued Accounting Pronouncements Not Yet Adopted

Selected Balance Sheet Components

9 Months Ended

Sep. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Selected Balance Sheet Components

Prepaid expenses and other current assets

Prepaid expenses and other current assets was as follows (in thousands):


	September 30, 2024		December 31, 2023
Prepaid technology access fee	$	1,334	$	—
Prepaid insurance	375		—
Other prepaid expenses	372		—
Other current assets	143		—
Total prepaid expenses and other current assets	$	2,224	$	—

Property and equipment, net

Property and equipment at September 30, 2024 and December 31, 2023 net of accumulated depreciation expense was as follows (in thousands):


	September 30, 2024		December 31, 2023
Computer equipment	$	31	$	30
Equipment	853		837
Software	96		96
Total property and equipment	980		963
Less accumulated depreciation	(461)		(390)
Total property and equipment, net	$	519	$	573

Depreciation expense for the three and nine months ended September 30, 2024 and 2023 was immaterial.

Intangible assets, net

At September 30, 2024, intangible assets, primarily consisting of acquired IPR&D with alternative use and patents, and accumulated amortization were as follows (in thousands):


	September 30, 2024
Intangible assets	$	576
Accumulated amortization	(67)
Total intangible assets, net	$	509

Amortization of intangible assets for periods subsequent to September 30, 2024 is as follows (in thousands):


Year Ending December 31,	Amortization Expense
2024	$	33
2025	131
2026	131
2027	131
Thereafter	83
Total	$	509

Accrued liabilities

At September 30, 2024 and December 31, 2023, accrued liabilities were comprised of the following (in thousands):


	September 30, 2024		December 31, 2023
Accrued severance	$	606	$	—
Accrued interest on convertible promissory notes	—		558
Accrued compensation	201		13
Other accrued expenses	352		12
Total accrued expenses	$	1,159	$	583

Related Party Transactions

9 Months Ended

Sep. 30, 2024

Related Party Transactions

Convertible Notes Agreement and Asset Contribution Agreement

Indebtedness Exchange Agreement and Issuance of AgeX Preferred Stock

2022 Secured Note

2023 Secured Note

Security Agreement

Debt Issuance Costs

The following table summarizes the debt balances net of unamortized deferred debt issuance costs by loan agreement as of September 30, 2024 (in thousands):


	Principal		Origination Fee		Total Debt		Unamortized Debt Issuance Costs		Total Debt, Net
Current
2022 Secured Note	$	9,692	$	778	$	10,470	$	(8)	$	10,462
Non-current
2023 Secured Note	—		693		693		—		693
Total debt, net	$	9,692	$	1,471	$	11,163	$	(8)	$	11,155

Indemnification Agreements

Fair Value Measurements

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

The Company had the following liabilities measured at fair value on a recurring basis (in thousands):


	Balance at September 30, 2024		Level 1		Level 2		Level 3
Liabilities:
Warrant liability	$	6,744	$	—	$	—	$	6,744
Total	$	6,744	$	—	$	—	$	6,744


	Balance at December 31, 2023		Level 1		Level 2		Level 3
Liabilities:
Convertible promissory notes	$	2,983	$	—	$	—	$	2,983
Total	$	2,983	$	—	$	—	$	2,983

Convertible Promissory Notes

AgeX-Serina Note

Legacy Serina Convertible Notes


	AgeX-Serina Note		Serina Convertible Notes
Balance as of December 31, 2023	$	2,983	$	—
Notes converted into common stock	(10,000)		—
Change in fair value	7,017		—
Balance as of September 30, 2024	$	—	$	—


	AgeX-Serina Note		Serina Convertible Notes
Balance as of December 31, 2022	$	—	$	1,617
Convertible debt issuance	10,000		100
Inception adjustment	(2,240)		—
Notes converted to Series A-5 pref. stock	—		(963)
Notes converted to warrants	—		(175)
Change in fair value	(3,898)		(579)
Balance as of September 30, 2023	$	3,862	$	—

Warrant Liability


	Merger Warrants		Assumed Warrants
Balance as of December 31, 2023	$	—	$	—
Fair value at inception	18,501		—
Exercise	(1,372)		—
Change in fair value	(10,385)		—
Balance as of September 30, 2024	$	6,744	$	—

Balance as of December 31, 2022	$	—	$	1,077
Change in fair value	—		(1,059)
Balance as of September 30, 2023	$	—	$	18

The Company estimates the fair value of warrants using the Black-Scholes-Merton option pricing model with the following assumptions at the reporting date:


	September 30, 2024		September 30, 2023
Expected volatility	99.15% -123.57%		97.0% - 99%
Expected term (in years)	0.8 – 3.49		0.30 - 0.8
Risk-free interest rate	3.58% - 4.45%		5.09% - 5.55%
Expected dividend yield	0.00	%	0.00	%

See Note 7, Stockholders’ Equity/(Deficit) for further details regarding the Merger Warrants and the Assumed Warrants.

Stockholders’ Equity/(Deficit)

9 Months Ended

Sep. 30, 2024

Equity [Abstract]

Stockholders’ Equity/(Deficit)

Redeemable Convertible Preferred Stock

All Legacy Serena redeemable convertible preferred stock was converted into common stock as described in Note 1.

The table below presents Legacy Serina redeemable convertible preferred stock information adjusted for the 0.97682654 Exchange Ratio as of December 31, 2023 (in thousands other than per share price).


Preference Order	Designation	Shares Designated	Shares Issued and Outstanding	Issue Price per Share		Carrying Value		Liquidation Preference
#1	Series A Preferred Stock	391	391	$	5.12	$	2,000	$	2,002
#2	Series A-1 Preferred Stock	293	293	6.82		$	1,998	$	1,998
#3	Series A-2 Preferred Stock	1,091	1,091	10.17		$	11,085	$	11,095
#4	Series A-3 Preferred Stock	487	487	12.80		$	6,240	$	6,234
#5	Series A-4 Preferred Stock	702	702	13.31		$	9,347	$	9,344
#6	Series A-5 Preferred Stock	1,954	474	13.31		$	5,734	$	6,309
		4,918	3,438			$	36,404	$	36,982

Common Stock

Warrants

Merger Warrants

Details of Merger Warrant activity for the nine months ended September 30, 2024 are as follows:


	Post-Merger Warrants	Incentive Warrants
Balance at December 31, 2023	-	-
Warrants issued	1,500	378
Warrants exercised	(378)	-
Warrants outstanding at September 30, 2024	1,122	378

Assumed Warrants

Former AgeX Warrants

Stock-Based Awards

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Stock-Based Awards

Equity Incentive Plan Awards

Serina 2024 Inducement Equity Plan

Serina 2024 Equity Incentive Plan

Serina 2017 Stock Option Plan

Serina 2017 Equity Incentive Plan

A summary of Serina stock option activity under all plans and related information are as follows (in thousands, except weighted average exercise price):


	Number of Options Outstanding	Weighted- Average Exercise Price (per share)
Balance at December 31, 2023	1,716	$0.06
Assumption of options in connection with the Merger	12	$24.04
Granted	1,653	$9.16
Exercised	(164)	$0.06
Cancelled/Forfeited	(1)	$26.48
Balance at September 30, 2024	3,216	$4.82
Options exercisable at September 30, 2024	1,598	$0.49

Stock-based Compensation Expense

Stock-based compensation expense has been allocated to operating expenses as follows (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Research and development	$	210	$	—	$	343	$	—
General and administrative	886		—		1,264		25
Total stock-based compensation expense	$	1,096	$	—	$	1,607	$	25


	Three Months Ended September 30,		Nine Months Ended September 30,
	2024(1)	2023(2)	2024(1)	2023(2)


Expected life (in years)	5.9 - 6.1	—	5.0 - 6.1	—
Volatility	117.91% - 118.33%	—	113.08% - 118.33%	—
Risk-free interest rates	3.54% - 4.14%	—	3.54% - 4.65%	—
Dividend yield	—	—	—	—

(1)Relates to stock options granted under the Serina 2024 Equity Incentive Plan during the period.

(2)There were no stock options granted during the period.

The Company does not recognize deferred income taxes for incentive stock option compensation expense and records a tax deduction only when a disqualified disposition has occurred.

Profit Sharing Plan	9 Months Ended
Profit Sharing Plan	Sep. 30, 2024
Postemployment Benefits [Abstract]
Profit Sharing Plan	Profit Sharing Plan Through its wholly owned subsidiary Legacy Serina, the Company has established a 401(k) profit sharing plan (the “PSP”) for all eligible employees of the Company. The PSP provides for eligible employee contributions subject to certain annual Internal Revenue Code limits. For participants who are age 50 or older during any calendar year, additional employee contributions are allowed under the PSP, subject to Internal Revenue Code limits. Employer contributions, if any, may include matching contributions and profit sharing contributions, both of which are made on a discretionary basis and are subject to service and employment requirements. Employer matching contributions and employer profit sharing contributions vest based on a graded vesting schedule. The Company made no discretionary employer matching or employer profit sharing contributions for the three and nine months ended September 30, 2024 and 2023.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes for interim periods is determined using an estimated annual effective tax rate in accordance with ASC 740-270, Income Taxes, Interim Reporting. The effective tax rate may be subject to fluctuations during the year as new information is obtained, which may affect the assumptions used to estimate the annual effective tax rate, including factors such as valuation allowances against deferred tax assets, the recognition or de-recognition of tax benefits related to uncertain tax positions, if any, and changes in or the interpretation of tax laws in jurisdictions where the Company conducts business. Due to losses incurred for all periods presented, the Company did not record a provision or benefit for income taxes. A valuation allowance is provided when it is more likely than not that some portion of the deferred tax assets will not be realized. The Company established a full valuation allowance for all of its deferred tax assets for all periods presented due to the uncertainty of realizing future tax benefits from its net operating loss carryforwards and other deferred tax assets. The Company reports income tax related interest and penalties within its provision for income tax in its condensed consolidated statements of operations. Similarly, the Company reports the reversal of income tax-related interest and penalties within its provision for income tax line item to the extent the Company resolves its liabilities for uncertain tax positions in a manner favorable to its accruals therefor, during the nine months ended September 30, 2024 and 2023, the Company did not record unrecognized tax benefits.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Facilities and Equipment Lease Agreements

The Company also leases laboratory equipment under a long-term, non-cancelable operating lease which expired in September 2024 and was subsequently replaced by a month-to-month cancellable agreement.

Supplemental cash flow information related to leases is as follows (in thousands):


	Nine Months Ended September 30,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	166	$	132
Operating cash flows from finance leases	$	2	$	4
Financing cash flows from finance leases	$	34	$	35
Right-of-use assets obtained in exchange for lease obligations
Operating leases	$	—	$	672
Finance leases	$	—	$	—

Supplemental balance sheet information related to leases was as follows (in thousands other than weighted average remaining lease term and discount rates):


	September 30, 2024			December 31, 2023
Operating lease
Right-of-use assets	$	862		$	862
Accumulated Amortization	(353)			(196)
Right-of-use asset, net	$	509		$	666

Right-of-use lease liability, current	$	197		$	214
Right-of-use lease liability, noncurrent	312			461
Total operating lease liabilities	$	509		$	675

Finance leases
Right-of-use assets	$	163		$	163
Accumulated Amortization	(71)			(53)
Right-of-use asset, net	$	92		$	110

Right-of-use lease liability, current	$	1		$	36
Right-of-use lease liability, noncurrent	—			1
Total finance lease liabilities	$	1		$	37

Weighted average remaining lease term
Operating lease	2.78 years			3.32 years
Finance leases	0.42 years			0.64 years

Weighted average discount rate
Operating lease	6.67		%	6.67		%
Finance leases	6.67		%	11.9		%

The following is a maturity analysis of the annual undiscounted cash flows of the operating lease liabilities as of September 30, 2024 (in thousands):


	Operating Leases
Three months ending December 31, 2024	$	56
Year ending December 31, 2025	217
Year ending December 31, 2026	159
Year ending December 31, 2027	117
Thereafter	10
Total undiscounted lease payments	559
Less: imputed interest	(50)
Total lease obligations	509
Less: current portion	(197)
Long-term lease obligations	$	312

Litigation – General

Tax Filings

Employment Contracts

Partnership with Enable

Indemnification

indemnification agreements is minimal. Accordingly, the Company has not recorded any liabilities for these agreements to date.

Net Earnings (Loss) Per Common Share

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Net Earnings (Loss) Per Common Share


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Basic net earnings (loss) per common share allocable to common stockholders

NUMERATOR
Net income (loss)	1,383		1,752		(8,455)		4,218
Less: net loss attributable to noncontrolling interest	27		—		54		—
Net earnings (loss) attributable to Serina	1,410		1,752		(8,401)		4,218
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share	8,851		2,190		6,774		2,176

Basic net earnings (loss) per common share allocable to common stockholders	$	0.16	$	0.80	$	(1.24)	$	1.94

Diluted net earnings (loss) per common share allocable to common stockholders

NUMERATOR
Net earnings (loss) attributable to Serina	1,410		1,752		(8,401)		4,218
Add back: interest on convertible promissory notes	—		6		—		83
Net earnings (loss) allocable to common stockholders	1,410		1,758		(8,401)		4,301
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share	8,851		2,190		6,774		2,176
Add: dilutive effect of stock options	1,900		1,840		—		1,820
Add: dilutive effect of warrants	—		—		—		—
Add: dilutive effect of common stock issued for convertible promissory notes	—		115		—		113
Add: dilutive effect of redeemable convertible preferred stock	—		3,439		—		3,439
Weighted-average shares of common stock outstanding used to calculate diluted net earnings (loss) per common share	10,751		7,584		6,774		7,548

Diluted net earnings (loss) per common share attributable to common stockholders	0.13		0.23		(1.24)		0.57


	Three and Nine months ended September 30, 2024

Redeemable convertible preferred stock	—	—
Convertible promissory notes	—	—
Stock options	837	3,216
Warrants	3,226	3,226
Total anti-dilutive securities	4,063	6,442

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Nothing to report.

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 1,410	$ 1,752	$ (8,401)	$ 4,218

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2024

Accounting Policies [Abstract]

Principles of consolidation

Financial Statement Reclassification

Use of estimates

Concentration of credit risk and other risks and uncertainties

Fair value measurements of financial instruments

The three levels of inputs that may be used to measure fair value are as follows:

•Level 1: Quoted prices in active markets for identical assets or liabilities.

Accounting for warrants

Redeemable convertible preferred stock

Cash, cash equivalents, and restricted cash


	September 30, 2024		December 31, 2023
Cash and cash equivalents	$	3,185	$	7,619
Restricted cash (1)	50		—
Cash, cash equivalents, and restricted cash as shown in the condensed consolidated statements of cash flows	$	3,235	$	7,619

(1)Restricted cash entirely represents the deposit required to maintain the Company’s corporate credit card program.

Property and equipment, net

Leases

Intangible assets, net

Impairment of long-lived assets

Grant revenues

The Company believes the recognition of revenue as costs are incurred and amounts become realizable is analogous to the concept of transfer of control of a service over time under ASC 606.

Grant revenues for the three and nine months ended September 30, 2024 and 2023 were not material.

Research and development

General and administrative

Income taxes

Stock-based compensation expense

Stock-based Compensation Expense

Basic and diluted net earnings (loss) per share attributable to common stockholders

Segment reporting

Recently adopted accounting pronouncements

Recently Issued Accounting Pronouncements Not Yet Adopted

Basis of Presentation and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2024

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash


	September 30, 2024		December 31, 2023
Cash and cash equivalents	$	3,185	$	7,619
Restricted cash (1)	50		—
Cash, cash equivalents, and restricted cash as shown in the condensed consolidated statements of cash flows	$	3,235	$	7,619

(1)Restricted cash entirely represents the deposit required to maintain the Company’s corporate credit card program.

Selected Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets was as follows (in thousands):


	September 30, 2024		December 31, 2023
Prepaid technology access fee	$	1,334	$	—
Prepaid insurance	375		—
Other prepaid expenses	372		—
Other current assets	143		—
Total prepaid expenses and other current assets	$	2,224	$	—

Schedule of Property and Equipment, Net

Property and equipment at September 30, 2024 and December 31, 2023 net of accumulated depreciation expense was as follows (in thousands):


	September 30, 2024		December 31, 2023
Computer equipment	$	31	$	30
Equipment	853		837
Software	96		96
Total property and equipment	980		963
Less accumulated depreciation	(461)		(390)
Total property and equipment, net	$	519	$	573

Schedule of Intangible Assets, Net

At September 30, 2024, intangible assets, primarily consisting of acquired IPR&D with alternative use and patents, and accumulated amortization were as follows (in thousands):


	September 30, 2024
Intangible assets	$	576
Accumulated amortization	(67)
Total intangible assets, net	$	509

Schedule of Amortization of Intangible Assets

Amortization of intangible assets for periods subsequent to September 30, 2024 is as follows (in thousands):


Year Ending December 31,	Amortization Expense
2024	$	33
2025	131
2026	131
2027	131
Thereafter	83
Total	$	509

Schedule of Accrued Liabilities

At September 30, 2024 and December 31, 2023, accrued liabilities were comprised of the following (in thousands):


	September 30, 2024		December 31, 2023
Accrued severance	$	606	$	—
Accrued interest on convertible promissory notes	—		558
Accrued compensation	201		13
Other accrued expenses	352		12
Total accrued expenses	$	1,159	$	583

Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2024

Schedule of Debt Issuance Costs and Debt Balances

The following table summarizes the debt balances net of unamortized deferred debt issuance costs by loan agreement as of September 30, 2024 (in thousands):


	Principal		Origination Fee		Total Debt		Unamortized Debt Issuance Costs		Total Debt, Net
Current
2022 Secured Note	$	9,692	$	778	$	10,470	$	(8)	$	10,462
Non-current
2023 Secured Note	—		693		693		—		693
Total debt, net	$	9,692	$	1,471	$	11,163	$	(8)	$	11,155

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Schedule of Liabilities Measured at Fair Value on Recurring Basis

The Company had the following liabilities measured at fair value on a recurring basis (in thousands):


	Balance at September 30, 2024		Level 1		Level 2		Level 3
Liabilities:
Warrant liability	$	6,744	$	—	$	—	$	6,744
Total	$	6,744	$	—	$	—	$	6,744


	Balance at December 31, 2023		Level 1		Level 2		Level 3
Liabilities:
Convertible promissory notes	$	2,983	$	—	$	—	$	2,983
Total	$	2,983	$	—	$	—	$	2,983

Schedule of Convertible Promissory Note Liabilities Measured at Fair Value on Recurring Basis


	AgeX-Serina Note		Serina Convertible Notes
Balance as of December 31, 2023	$	2,983	$	—
Notes converted into common stock	(10,000)		—
Change in fair value	7,017		—
Balance as of September 30, 2024	$	—	$	—


	AgeX-Serina Note		Serina Convertible Notes
Balance as of December 31, 2022	$	—	$	1,617
Convertible debt issuance	10,000		100
Inception adjustment	(2,240)		—
Notes converted to Series A-5 pref. stock	—		(963)
Notes converted to warrants	—		(175)
Change in fair value	(3,898)		(579)
Balance as of September 30, 2023	$	3,862	$	—

Schedule of Warrant Liability Measured at Fair Value on Recurring Basis


	Merger Warrants		Assumed Warrants
Balance as of December 31, 2023	$	—	$	—
Fair value at inception	18,501		—
Exercise	(1,372)		—
Change in fair value	(10,385)		—
Balance as of September 30, 2024	$	6,744	$	—

Balance as of December 31, 2022	$	—	$	1,077
Change in fair value	—		(1,059)
Balance as of September 30, 2023	$	—	$	18

Schedule of Estimates the Fair Value of Warrants

The Company estimates the fair value of warrants using the Black-Scholes-Merton option pricing model with the following assumptions at the reporting date:


	September 30, 2024		September 30, 2023
Expected volatility	99.15% -123.57%		97.0% - 99%
Expected term (in years)	0.8 – 3.49		0.30 - 0.8
Risk-free interest rate	3.58% - 4.45%		5.09% - 5.55%
Expected dividend yield	0.00	%	0.00	%

Stockholders’ Equity/(Deficit) (Tables)

9 Months Ended

Sep. 30, 2024

Class of Warrant or Right [Line Items]

Schedule of Redeemable Convertible Preferred Stock

The table below presents Legacy Serina redeemable convertible preferred stock information adjusted for the 0.97682654 Exchange Ratio as of December 31, 2023 (in thousands other than per share price).


Preference Order	Designation	Shares Designated	Shares Issued and Outstanding	Issue Price per Share		Carrying Value		Liquidation Preference
#1	Series A Preferred Stock	391	391	$	5.12	$	2,000	$	2,002
#2	Series A-1 Preferred Stock	293	293	6.82		$	1,998	$	1,998
#3	Series A-2 Preferred Stock	1,091	1,091	10.17		$	11,085	$	11,095
#4	Series A-3 Preferred Stock	487	487	12.80		$	6,240	$	6,234
#5	Series A-4 Preferred Stock	702	702	13.31		$	9,347	$	9,344
#6	Series A-5 Preferred Stock	1,954	474	13.31		$	5,734	$	6,309
		4,918	3,438			$	36,404	$	36,982

Merger Warrants

Class of Warrant or Right [Line Items]

Schedule of Warrant Activity

Details of Merger Warrant activity for the nine months ended September 30, 2024 are as follows:


	Post-Merger Warrants	Incentive Warrants
Balance at December 31, 2023	-	-
Warrants issued	1,500	378
Warrants exercised	(378)	-
Warrants outstanding at September 30, 2024	1,122	378

Stock-Based Awards (Tables)

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

A summary of Serina stock option activity under all plans and related information are as follows (in thousands, except weighted average exercise price):


	Number of Options Outstanding	Weighted- Average Exercise Price (per share)
Balance at December 31, 2023	1,716	$0.06
Assumption of options in connection with the Merger	12	$24.04
Granted	1,653	$9.16
Exercised	(164)	$0.06
Cancelled/Forfeited	(1)	$26.48
Balance at September 30, 2024	3,216	$4.82
Options exercisable at September 30, 2024	1,598	$0.49

Schedule of Stock Based Compensation Expense

Stock-based compensation expense has been allocated to operating expenses as follows (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Research and development	$	210	$	—	$	343	$	—
General and administrative	886		—		1,264		25
Total stock-based compensation expense	$	1,096	$	—	$	1,607	$	25

Schedule of Weighted Average Assumptions to Calculate Fair Value of Stock Options


	Three Months Ended September 30,		Nine Months Ended September 30,
	2024(1)	2023(2)	2024(1)	2023(2)


Expected life (in years)	5.9 - 6.1	—	5.0 - 6.1	—
Volatility	117.91% - 118.33%	—	113.08% - 118.33%	—
Risk-free interest rates	3.54% - 4.14%	—	3.54% - 4.65%	—
Dividend yield	—	—	—	—

(1)Relates to stock options granted under the Serina 2024 Equity Incentive Plan during the period.

(2)There were no stock options granted during the period.

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Cash Flow Information Related to Leases

Supplemental cash flow information related to leases is as follows (in thousands):


	Nine Months Ended September 30,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	166	$	132
Operating cash flows from finance leases	$	2	$	4
Financing cash flows from finance leases	$	34	$	35
Right-of-use assets obtained in exchange for lease obligations
Operating leases	$	—	$	672
Finance leases	$	—	$	—

Schedule of Supplemental Balance Sheet Information Related to Leases

Supplemental balance sheet information related to leases was as follows (in thousands other than weighted average remaining lease term and discount rates):


	September 30, 2024			December 31, 2023
Operating lease
Right-of-use assets	$	862		$	862
Accumulated Amortization	(353)			(196)
Right-of-use asset, net	$	509		$	666

Right-of-use lease liability, current	$	197		$	214
Right-of-use lease liability, noncurrent	312			461
Total operating lease liabilities	$	509		$	675

Finance leases
Right-of-use assets	$	163		$	163
Accumulated Amortization	(71)			(53)
Right-of-use asset, net	$	92		$	110

Right-of-use lease liability, current	$	1		$	36
Right-of-use lease liability, noncurrent	—			1
Total finance lease liabilities	$	1		$	37

Weighted average remaining lease term
Operating lease	2.78 years			3.32 years
Finance leases	0.42 years			0.64 years

Weighted average discount rate
Operating lease	6.67		%	6.67		%
Finance leases	6.67		%	11.9		%

Schedule of Annual Undiscounted Cash Flows of The Lease Liabilities

The following is a maturity analysis of the annual undiscounted cash flows of the operating lease liabilities as of September 30, 2024 (in thousands):


	Operating Leases
Three months ending December 31, 2024	$	56
Year ending December 31, 2025	217
Year ending December 31, 2026	159
Year ending December 31, 2027	117
Thereafter	10
Total undiscounted lease payments	559
Less: imputed interest	(50)
Total lease obligations	509
Less: current portion	(197)
Long-term lease obligations	$	312

Net Earnings (Loss) Per Common Share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Earnings (Loss) Per Common Share Attributable to Common Shareholders


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Basic net earnings (loss) per common share allocable to common stockholders

NUMERATOR
Net income (loss)	1,383		1,752		(8,455)		4,218
Less: net loss attributable to noncontrolling interest	27		—		54		—
Net earnings (loss) attributable to Serina	1,410		1,752		(8,401)		4,218
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share	8,851		2,190		6,774		2,176

Basic net earnings (loss) per common share allocable to common stockholders	$	0.16	$	0.80	$	(1.24)	$	1.94

Diluted net earnings (loss) per common share allocable to common stockholders

NUMERATOR
Net earnings (loss) attributable to Serina	1,410		1,752		(8,401)		4,218
Add back: interest on convertible promissory notes	—		6		—		83
Net earnings (loss) allocable to common stockholders	1,410		1,758		(8,401)		4,301
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share	8,851		2,190		6,774		2,176
Add: dilutive effect of stock options	1,900		1,840		—		1,820
Add: dilutive effect of warrants	—		—		—		—
Add: dilutive effect of common stock issued for convertible promissory notes	—		115		—		113
Add: dilutive effect of redeemable convertible preferred stock	—		3,439		—		3,439
Weighted-average shares of common stock outstanding used to calculate diluted net earnings (loss) per common share	10,751		7,584		6,774		7,548

Diluted net earnings (loss) per common share attributable to common stockholders	0.13		0.23		(1.24)		0.57

Schedule of Diluted Net Earnings (loss) Per Common Share


	Three and Nine months ended September 30, 2024

Redeemable convertible preferred stock	—	—
Convertible promissory notes	—	—
Stock options	837	3,216
Warrants	3,226	3,226
Total anti-dilutive securities	4,063	6,442

Organization, Business Overview and Liquidity - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Conversion of stock, shares converted (in shares)							0.97682654
Number of shares acquisitions							5,913,277
Conversion of stock, shares issued (in shares)							0.97682654
Net income (loss)	$ 1,383	$ 5,177	$ (15,015)	$ 1,752	$ 808	$ 1,658	$ (8,455)	$ 4,218
Net cash used in operating activities							(12,548)	$ (2,597)
Cash and cash equivalents	3,185						3,185		$ 7,619
Expected proceeds from business merger warrant exercises	$ 10,000						$ 10,000

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) numberOfOperatingSegments	Mar. 26, 2024	Dec. 31, 2023 USD ($)
Property, Plant and Equipment [Line Items]
Cash, FDIC insured amount	$ 0.9		$ 0.0
Cash, SIPC insured amount	$ 1.3		$ 7.3
Finite-lived intangible asset, useful life (in years)	10 years
Operating segments \| numberOfOperatingSegments	1
Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life ( in years)	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life ( in years)	10 years
Serina Therapeutics Inc
Property, Plant and Equipment [Line Items]
Equity method investment, ownership percentage	100.00%
Univer Xome
Property, Plant and Equipment [Line Items]
Equity method investment, ownership percentage		94.80%
Reverse Bioengineering Inc
Property, Plant and Equipment [Line Items]
Equity method investment, ownership percentage		100.00%
NeuroAirmid Therapeutics Inc
Property, Plant and Equipment [Line Items]
Equity method investment, ownership percentage		47.50%

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Cash and cash equivalents	$ 3,185	$ 7,619
Restricted cash	50	0
Cash, cash equivalents, and restricted cash as shown in the condensed consolidated statements of cash flows	$ 3,235	$ 7,619	$ 7,581	$ 532

Selected Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid technology access fee	$ 1,334	$ 0
Prepaid insurance	375	0
Other prepaid expenses	372	0
Other current assets	143	0
Total prepaid expenses and other current assets	$ 2,224	$ 0

Selected Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 980	$ 963
Less accumulated depreciation	(461)	(390)
Total property and equipment, net	519	573
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	31	30
Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	853	837
Software
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 96	$ 96

Selected Balance Sheet Components - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Intangible assets	$ 576
Accumulated amortization	(67)
Total intangible assets, net	$ 509	$ 0

Selected Balance Sheet Components - Schedule of Amortization of Intangible Assets (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
2024	$ 33
2025	131
2026	131
2027	131
Thereafter	83
Total	$ 509

Selected Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued severance	$ 606	$ 0
Accrued interest on convertible promissory notes	0	558
Accrued compensation	201	13
Other accrued expenses	352	12
Total accrued expenses	$ 1,159	$ 583

Related Party Transactions - Narrative (Details) $ / shares in Units, $ in Thousands										1 Months Ended	9 Months Ended	12 Months Ended
	May 08, 2024 USD ($)	Mar. 26, 2024 USD ($)	Mar. 14, 2024	Nov. 09, 2023 USD ($)	Jul. 31, 2023 USD ($)	May 09, 2023 USD ($)	Mar. 13, 2023 USD ($)	Feb. 09, 2023 USD ($)	Feb. 14, 2022 USD ($)	Jul. 31, 2023 USD ($)	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 21, 2023 shares
Line of credit											$ 9,692
Warrant issued (in shares) \| shares												53,980
Stock split conversion ratio			0.02843332
2022 Warrants \| Minimum
Warrant, exercise price, increase (in dollars per share) \| $ / shares												$ 20.75
2022 Warrants \| Maximum
Warrant, exercise price, increase (in dollars per share) \| $ / shares												$ 30.94
Secured Convertible Promissory Note \| Secured Debt
Line of credit facility, current borrowing capacity					$ 16,700					$ 16,700
Debt instrument, decrease, forgiveness										18,000
Loan processing fee										1,300
Juvenescence Limited
Gain (loss) on extinguishment of debt										$ 36,000
Juvenescence Limited \| Secured Convertible Promissory Note
Line of credit facility, current borrowing capacity							$ 10,000
Proceeds from issuance of long-term debt							10,000
Juvenescence
Warrant issued (in shares) \| shares												294,482	467,657
Juvenescence \| Secured Convertible Promissory Note
Debt instrument, face amount							$ 10,000
Merger Agreement
Other liabilities		$ 500
Merger Agreement \| 2022 Warrants
Warrant, exercise price, increase (in dollars per share) \| $ / shares											$ 25.01
Warrant, exercise price, decrease \| $ / shares											$ 20.75
Merger Agreement \| Juvenescence
Warrant issued (in shares) \| shares											129,593
Stock issued during period shares issued cancelled (in shares) \| shares											164,889
2022 Secured Convertible Promissory Note and Security Agreement
Line of credit									$ 13,200
Line of credit facility, expiration period									12 months
Line of credit, current									$ 8,200
Line of credit facility, current borrowing capacity									$ 7,200
2022 Secured Convertible Promissory Note and Security Agreement \| Secured Debt
Line of credit facility, current borrowing capacity											$ 26,500	$ 7,500
2022 Secured Convertible Promissory Note and Security Agreement \| Secured Convertible Promissory Note
Line of credit facility, increase (decrease), net						$ 4,000		$ 2,000
2022 Secured Note
Line of credit facility, increase (decrease), net	$ 500	$ 2,400		$ 4,400
Loan origination fee	4.00%
2022 Secured Note \| Secured Debt
Line of credit											$ 6,300
Registration Rights Agreements
Commitment fee percentage					7.00%

Related Party Transactions - Schedule of Debt Issuance Costs and Debt Balances (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Short-Term Debt [Line Items]
Principal	$ 9,692
Origination Fee	1,471
Total Debt	11,163
Unamortized Debt Issuance Costs	(8)
Long-Term Debt, Total	11,155
2022 Secured Note
Short-Term Debt [Line Items]
Principal	9,692
Origination Fee	778
Total Debt	10,470
Unamortized Debt Issuance Costs	(8)
Long-Term Debt, Total	10,462
2023 Secured Note
Short-Term Debt [Line Items]
Principal	0
Origination Fee	693
Total Debt	693
Unamortized Debt Issuance Costs	0
Long-Term Debt, Total	$ 693

Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability	$ 6,744
Convertible promissory notes		$ 2,983
Total	6,744	2,983
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability	0
Convertible promissory notes		0
Total	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability	0
Convertible promissory notes		0
Total	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability	6,744
Convertible promissory notes		2,983
Total	$ 6,744	$ 2,983

Fair Value Measurements - Narrative (Details) - USD ($)			3 Months Ended		9 Months Ended
Fair Value Measurements - Narrative (Details) - USD ($)	Mar. 26, 2024	Mar. 15, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Feb. 28, 2023	Jun. 06, 2024	Mar. 19, 2024	Dec. 31, 2023	Dec. 21, 2023	Jul. 26, 2023	Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Change in fair value of convertible promissory notes			$ 0	$ (2,614,000)	$ 7,017,000	$ (4,477,000)
Change in fair value of warrants			(6,669,000)	(596,000)	$ (10,385,000)	(1,059,000)
Warrants exercisable shares (in shares)										53,980
Conversion of stock, shares issued (in shares)					0.97682654
Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Change in fair value			$ 6,700,000	600,000	$ 10,400,000	1,100,000
Conversion of stock, shares issued (in shares)	0.97682654
Post-Merger Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants exercisable shares (in shares)			1,122,419		1,122,419			377,865	1,133,593
Class of warrant or right, exercise price of warrants or rights (in usd per share)								$ 13.20	$ 18.00
Warrants and rights outstanding								$ 5,000,000
Class of warrant or right, outstanding (in shares)			1,122,419		1,122,419					0
Incentive Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants exercisable shares (in shares)			377,865		377,865			377,865
Class of warrant or right, exercise price of warrants or rights (in usd per share)			$ 18.00		$ 18.00			$ 18.00
Warrants and rights outstanding, maturity date			Mar. 26, 2028		Mar. 26, 2028
Class of warrant or right, outstanding (in shares)			378,000		378,000					0
Assumed Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Change in fair value of warrants					$ 0	(1,059,000)
Class of warrant or right, exercise price of warrants or rights (in usd per share)			$ 20.47		$ 20.47
Warrants and rights outstanding			$ 0	18,000	$ 0	18,000				$ 0			$ 1,077,000
Convertible Promissory Note
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal amount		$ 10,000,000
Fair value, option, changes in fair value, gain (loss)		7,800,000
Change in fair value of convertible promissory notes			$ 0	(2,200,000)		(3,900,000)
Issued Interest Bearing Convertible Promissory Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal amount							$ 1,500,000
Debt instrument, interest rate, stated percentage							6.00%
Discount percentage							0.20
Valuation cap							$ 100,000,000
Class of warrant or right, exercise price of warrants or rights (in usd per share)							$ 20.47
Issued Interest Bearing Convertible Promissory Notes \| Series A-5 Preferred Stock
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conversion price (in usd per share)							$ 13.31
Issued Interest Bearing Convertible Promissory Notes \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Proceeds from issuance of preferred stock and preference stock							$ 15,000,000.0
Capitalization factor							$ 100,000,000
Convertible Notes \| Series A-5 Preferred Stock
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)												115,171
Change in fair value				$ (400,000)		$ (600,000)
Juvenescence
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants exercisable shares (in shares)										294,482	467,657
Juvenescence \| Convertible Note Purchase Agreement
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal amount		$ 10,000,000
Debt instrument, interest rate, stated percentage		7.00%
Juvenescence Limited \| Post-Merger Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Class of warrant or right, outstanding (in shares)			755,728		755,728
Juvenescence Limited \| Incentive Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Class of warrant or right, outstanding (in shares)			377,865		377,865

Fair Value Measurements - Schedule of Convertible Promissory Note Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
AgeX-Serina Note
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 2,983	$ 0
Notes converted into common stock	(10,000)
Change in fair value	7,017	(3,898)
Convertible debt issuance		10,000
Inception adjustment		(2,240)
Ending balance	0	3,862
AgeX-Serina Note \| Series A-5 Preferred Stock
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Notes converted into common stock	0
AgeX-Serina Note \| Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Notes converted into common stock	0
Serina Convertible Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	1,617
Notes converted into common stock	0
Change in fair value	0	(579)
Convertible debt issuance		100
Inception adjustment		0
Ending balance	0	$ 0
Serina Convertible Notes \| Series A-5 Preferred Stock
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Notes converted into common stock	(963)
Serina Convertible Notes \| Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Notes converted into common stock	$ (175)

Fair Value Measurements - Schedule of Warrant Liability Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Class of Warrant or Right Outstanding [Roll Forward]
Change in fair value of warrants	$ (6,669)	$ (596)	$ (10,385)	$ (1,059)
Merger Warrants
Class of Warrant or Right Outstanding [Roll Forward]
Beginning balance			0	0	$ 0
Fair value at inception			18,501
Exercise			(1,372)
Change in fair value of warrants			(10,385)	0
Ending balance	6,744	0	6,744	0	0
Assumed Warrants
Class of Warrant or Right Outstanding [Roll Forward]
Beginning balance			0	1,077	1,077
Fair value at inception			0
Exercise			0
Change in fair value of warrants			0	(1,059)
Ending balance	$ 0	$ 18	$ 0	$ 18	$ 0

Fair Value Measurements - Schedule of Estimates the Fair Value of Warrants (Details)	Sep. 30, 2024	Sep. 30, 2023
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected term (in years)	9 months 18 days	3 months 18 days
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected term (in years)	3 years 5 months 26 days	9 months 18 days
Expected volatility \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input	0.9915	0.970
Expected volatility \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input	1.2357	0.99
Risk-free interest rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input	0.0358	0.0509
Risk-free interest rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input	0.0445	0.0555
Expected dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input	0.0000	0.0000

Stockholders’ Equity/(Deficit) - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 14, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Jun. 06, 2024	Mar. 19, 2024	Dec. 31, 2022
Class of Stock [Line Items]
Common stock, voting rights				common stock are entitled to one vote for each share
Warrant issued (in shares)						53,980
Conversion of stock, shares issued (in shares)				0.97682654
Change in fair value of warrants		$ (6,669)	$ (596)	$ (10,385)	$ (1,059)
Assumed Warrants
Class of Stock [Line Items]
Warrant issued (in shares)		473,681		473,681		115,170
Warrant outstanding (in shares)		473,681		473,681
Class of warrant or right, exercise price of warrants or rights (in usd per share)		$ 20.47		$ 20.47
Conversion of stock, shares issued (in shares)				0.97682654
Change in fair value of warrants						$ 200
Assumed Warrants \| Put and Call Option
Class of Stock [Line Items]
Warrant issued (in shares)		358,511		358,511
Warrants
Class of Stock [Line Items]
Warrant issued (in shares)		129,593		129,593
Warrant outstanding (in shares)		129,593		129,593
Warrants
Class of Stock [Line Items]
Reverse stock split	1 for 35.17
Warrants \| Minimum
Class of Stock [Line Items]
Class of warrant or right, exercise price of warrants or rights (in usd per share)		$ 20.75		$ 20.75
Warrants \| Maximum
Class of Stock [Line Items]
Class of warrant or right, exercise price of warrants or rights (in usd per share)		$ 25.01		$ 25.01
Merger Warrants
Class of Stock [Line Items]
Other additional capital								$ 15,000
Warrants and rights outstanding		$ 6,744	$ 0	$ 6,744	0	$ 0			$ 0
Change in fair value of warrants				$ (10,385)	$ 0
Post-Merger Warrants
Class of Stock [Line Items]
Warrant issued (in shares)		1,122,419		1,122,419			377,865	1,133,593
Warrant outstanding (in shares)		1,122,419		1,122,419		0
Class of warrant or right, exercise price of warrants or rights (in usd per share)							$ 13.20	$ 18.00
Warrants and rights outstanding							$ 5,000
Post-Merger Warrants \| Juvenescence Limited
Class of Stock [Line Items]
Warrant outstanding (in shares)		755,728		755,728
Incentive Warrants
Class of Stock [Line Items]
Warrant issued (in shares)		377,865		377,865			377,865
Warrant outstanding (in shares)		378,000		378,000		0
Class of warrant or right, exercise price of warrants or rights (in usd per share)		$ 18.00		$ 18.00			$ 18.00
Warrants and rights outstanding, maturity date		Mar. 26, 2028		Mar. 26, 2028
Incentive Warrants \| Juvenescence Limited
Class of Stock [Line Items]
Warrant outstanding (in shares)		377,865		377,865
Redeemable convertible preferred stock
Class of Stock [Line Items]
Redeemable convertible preferred stock per share (in usd per share)						$ 0.97682654

Stockholders’ Equity/(Deficit) - Schedule of Redeemable Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, shares in Thousands	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Shares Designated (in shares)	10,000			10,000
Issue Price per Share (in usd per share)	$ 0.01			$ 0.01
Carrying Value	$ 0	$ 0	$ 0	$ 36,404,000	$ 36,404,000	$ 35,442,000	$ 35,442,000	$ 35,442,000
Liquidation Preference	$ 0			$ 36,982,000
Redeemable convertible preferred stock
Class of Stock [Line Items]
Redeemable convertible preferred stock per share (in usd per share)				$ 0.97682654
Series A Preferred Stock
Class of Stock [Line Items]
Shares Designated (in shares)				391
Shares Issued and Outstanding (in shares)				391
Issue Price per Share (in usd per share)				$ 5.12
Carrying Value				$ 2,000,000
Liquidation Preference				$ 2,002,000
Series A-1 Preferred Stock
Class of Stock [Line Items]
Shares Designated (in shares)				293
Shares Issued and Outstanding (in shares)				293
Issue Price per Share (in usd per share)				$ 6.82
Carrying Value				$ 1,998,000
Liquidation Preference				$ 1,998,000
Series A-2 Preferred Stock
Class of Stock [Line Items]
Shares Designated (in shares)				1,091
Shares Issued and Outstanding (in shares)				1,091
Issue Price per Share (in usd per share)				$ 10.17
Carrying Value				$ 11,085,000
Liquidation Preference				$ 11,095,000
Series A-3 Preferred Stock
Class of Stock [Line Items]
Shares Designated (in shares)				487
Shares Issued and Outstanding (in shares)				487
Issue Price per Share (in usd per share)				$ 12.80
Carrying Value				$ 6,240,000
Liquidation Preference				$ 6,234,000
Series A-4 Preferred Stock
Class of Stock [Line Items]
Shares Designated (in shares)				702
Shares Issued and Outstanding (in shares)				702
Issue Price per Share (in usd per share)				$ 13.31
Carrying Value				$ 9,347,000
Liquidation Preference				$ 9,344,000
Series A-5 Preferred Stock
Class of Stock [Line Items]
Shares Designated (in shares)				1,954
Shares Issued and Outstanding (in shares)				474
Issue Price per Share (in usd per share)				$ 13.31
Carrying Value				$ 5,734,000
Liquidation Preference				$ 6,309,000
Redeemable Convertible Preferred Stock, Pre-Merger
Class of Stock [Line Items]
Shares Designated (in shares)				4,918
Shares Issued and Outstanding (in shares)				3,438
Carrying Value				$ 36,404,000

Stockholders’ Equity/(Deficit) - Schedule of Warrant Activity (Details)	9 Months Ended
	Sep. 30, 2024 shares
Post-Merger Warrants
Class of Warrant or Right [Line Items]
Beginning balance (in shares)	0
Warrants issued (in shares)	1,500,000
Warrants exercised (in shares)	(378,000)
Ending balance (in shares)	1,122,419
Incentive Warrants
Class of Warrant or Right [Line Items]
Beginning balance (in shares)	0
Warrants issued (in shares)	378,000
Warrants exercised (in shares)	0
Ending balance (in shares)	378,000

Stock-Based Awards -Narrative (Details) $ / shares in Units, $ in Thousands		9 Months Ended
	Mar. 14, 2024	Sep. 30, 2024 USD ($) $ / shares shares	Aug. 15, 2024 shares	Mar. 27, 2024 shares	Dec. 31, 2023 $ / shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 4.82			$ 0.06
Exercised (in shares)		164,000
Conversion of stock, shares issued (in shares)		0.97682654
Stock split conversion ratio	0.02843332
2024 Inducement Equity Plan \| Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares available for grant (in shares)			1,000,000
2024 Equity Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options granted (in shares)		1,652,792
Exercised (in shares)		0
Grants in period, weighted average grant date fair value (in usd per share) \| $ / shares		$ 7.95
Cost not yet recognized, amount \| $		$ 11,500
Weighted average remaining contractual term		1 year 9 months 18 days
2024 Equity Incentive Plan \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 6.66
2024 Equity Incentive Plan \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 14.87
2024 Equity Incentive Plan \| Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares available for grant (in shares)				1,725,000
Serina 2017 Stock Option Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares available for grant (in shares)		1,551,411
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 0.06
Exercised (in shares)		164,693
Conversion of stock, shares issued (in shares)		0.97682654
Serina 2017 Equity Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options granted (in shares)		11,359
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 0.7751
Common stock, capital shares reserved for future issuance (in share)		241,683
Stock split conversion ratio		0.02843332
Serina 2017 Equity Incentive Plan \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 13.19
Serina 2017 Equity Incentive Plan \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options, outstanding, weighted average exercise price (in usd per share) \| $ / shares		$ 25.96

Stock-Based Awards - Schedule of Stock Option Activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2024
Number of Options Outstanding
Beginning balance (in shares)	1,716,000
Assumption of options in connection with the merger (in shares)	12,000
Granted (in shares)	1,653,000
Exercised (in shares)	(164,000)
Cancelled/Forfeited (in shares)	(1,000)
Ending balance (in shares)	3,216,000
Exercisable, number (in shares)	1,598,000
Weighted- Average Exercise Price (per share)
Beginning balance (in usd per share)	$ 0.06
Assumption of options in connection with the merger (in usd per share)	24.04
Granted (in usd per share)	9.16
Exercised (in usd per share)	0.06
Cancelled/Forfeited (in usd per share)	26.48
Ending balance (in usd per share)	4.82
Exercisable, weighted average exercise price (in usd per share)	$ 0.49

Stock-Based Awards - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 1,096	$ 0	$ 1,607	$ 25
Research and development
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	210	0	343	0
General and administrative
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 886	$ 0	$ 1,264	$ 25

Stock-Based Awards - Schedule of Weighted Average Assumptions to Calculate Fair Value of Stock Options (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected life (in years)
Dividend yield	0.00%		0.00%
Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected life (in years)	5 years 10 months 24 days		5 years
Volatility	117.91%		113.08%
Risk-free interest rates	3.54%		3.54%
Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected life (in years)	6 years 1 month 6 days		6 years 1 month 6 days
Volatility	118.33%		118.33%
Risk-free interest rates	4.14%		4.65%

Profit Sharing Plan - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
Profit Sharing Plan - Narrative (Details) - USD ($)	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Postemployment Benefits [Abstract]
Defined contribution plan, employer discretionary contribution amount	$ 0	$ 0	$ 0	$ 0

Commitments and Contingencies - Schedule of Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 166	$ 132
Operating cash flows from finance leases	2	4
Financing cash flows from finance leases	34	35
Right-of-use assets obtained in exchange for lease obligations
Operating leases	0	672
Finance leases	$ 0	$ 0

Commitments and Contingencies - Schedule of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Operating lease
Right-of-use assets	$ 862	$ 862
Accumulated Amortization	(353)	(196)
Right-of-use asset, net	509	666
Right-of-use lease liability, current	197	214
Right-of-use lease liability, noncurrent	312	461
Total operating lease liabilities	509	675
Finance leases
Right-of-use assets	163	163
Accumulated Amortization	(71)	(53)
Right-of-use asset, net	92	110
Right-of-use lease liability, current	1	36
Right-of-use lease liability, noncurrent	0	1
Total finance lease liabilities	$ 1	$ 37
Weighted average remaining lease term
Operating lease	2 years 9 months 10 days	3 years 3 months 25 days
Finance leases	5 months 1 day	7 months 20 days
Weighted average discount rate
Operating lease	6.67%	6.67%
Finance leases	6.67%	11.90%

Commitments and Contingencies - Schedule of Annual Undiscounted Cash Flows of The Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Operating Leases
Three months ending December 31, 2024	$ 56
Year ending December 31, 2025	217
Year ending December 31, 2026	159
Year ending December 31, 2027	117
Thereafter	10
Total undiscounted lease payments	559
Less: imputed interest	(50)
Total operating lease liabilities	509	$ 675
Less: current portion	(197)	(214)
Operating lease liabilities, net of current portion	$ 312	$ 461

Commitments and Contingencies - Narrative (Details) $ in Thousands	1 Months Ended
	May 31, 2024 USD ($)
Enable Arrangement
Other Commitments [Line Items]
Payments to acquire intangible assets	$ 2,000

Net Earnings (Loss) Per Common Share - Schedule of Basic and Diluted Net Earnings (Loss) Per Common Share Attributable to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
NUMERATOR
Net income (loss)	$ 1,383	$ 5,177	$ (15,015)	$ 1,752	$ 808	$ 1,658	$ (8,455)	$ 4,218
Less: net loss attributable to noncontrolling interest	27			0			54	0
Net earnings (loss) attributable to Serina	$ 1,410			$ 1,752			$ (8,401)	$ 4,218
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share ( in shares)	8,851			2,190			6,774	2,176
Basic net earnings (loss) per common share allocable to common stockholders (in usd per share)	$ 0.16			$ 0.80			$ (1.24)	$ 1.94
NUMERATOR
Net earnings (loss) attributable to Serina	$ 1,410			$ 1,752			$ (8,401)	$ 4,218
Add back: interest on convertible promissory notes	0			6			0	83
Net earnings (loss) allocable to common stockholders	$ 1,410			$ 1,758			$ (8,401)	$ 4,301
DENOMINATOR
Weighted-average shares of common stock outstanding used to calculate basic net earnings (loss) per common share ( in shares)	8,851			2,190			6,774	2,176
Add: dilutive effect of stock options	1,900			1,840			0	1,820
Add: dilutive effect of warrants	0			0			0	0
Add: dilutive effect of common stock issued for convertible promissory notes	0			115			0	113
Add: dilutive effect of redeemable convertible preferred stock	0			3,439			0	3,439
Weighted-average shares of common stock outstanding used to calculate diluted net earnings (loss) per common share ( in shares)	10,751			7,584			6,774	7,548
Diluted net earnings (loss) per common share attributable to common stockholders (in usd per share)	$ 0.13			$ 0.23			$ (1.24)	$ 0.57

Net Earnings (Loss) Per Common Share - Schedule of Diluted Net Earnings (loss) Per Common Share (Details) - shares shares in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities ( in shares)	4,063	6,442
Redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities ( in shares)	0	0
Convertible promissory notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities ( in shares)	0	0
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities ( in shares)	837	3,216
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities ( in shares)	3,226	3,226