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

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)


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

For the quarterly period ended March 31, 2024


☐			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 001-32335

_______________________________________

HALOZYME THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

_______________________________________


Delaware						88-0488686
(State or other jurisdiction of incorporation or organization)						(I.R.S. Employer Identification No.)

12390 El Camino Real						92130
San Diego						(Zip Code)
California
(Address of principal executive offices)

(858) 794-8889

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, $0.001 par value

HALO

The Nasdaq Stock Market LLC

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. Yes x 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). Yes x 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	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

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 pursuant to Section 13(a) of the Exchange Act. ¨

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

The number of outstanding shares of the registrant’s common stock, par value $0.001 per share, was 127,274,000 as of April 30, 2024.

HALOZYME THERAPEUTICS, INC.

TABLE OF CONTENTS

Page

PART I — FINANCIAL INFORMATION

Item 1.

Financial Statements

Condensed Consolidated Balance Sheets (Unaudited) - March 31, 2024 and December 31, 2023

Condensed Consolidated Statements of Income (Unaudited) - Three Months Ended March 31, 2024 and 2023

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - Three Months Ended March 31, 2024 and 2023

Condensed Consolidated Statements of Cash Flows (Unaudited) - Three Months Ended March 31, 2024 and 2023

Condensed Consolidated Statements of Stockholders’ Equity (Unaudited) - Three Months Ended March 31, 2024 and 2023

Notes to Condensed Consolidated Financial Statements (Unaudited)

Item 2.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 3.

Quantitative and Qualitative Disclosures About Market Risk

Item 4.

Controls and Procedures

PART II — OTHER INFORMATION

Item 1.

Legal Proceedings

Item 1A.

Risk Factors

Item 2.

Unregistered Sales of Equity Securities and Use of Proceeds

Item 3.

Defaults Upon Senior Securities

Item 4.

Mine Safety Disclosures

Item 5.

Other Information

Item 6.

Exhibits

SIGNATURES

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

HALOZYME THERAPEUTICS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands, except per share amounts)


	March 31, 2024		December 31, 2023
ASSETS
Current assets
Cash and cash equivalents	$	164,627	$	118,370
Marketable securities, available-for-sale	298,824		217,630
Accounts receivable, net and contract assets	195,902		234,210
Inventories, net	168,541		127,601
Prepaid expenses and other current assets	45,690		48,613
Total current assets	873,584		746,424
Property and equipment, net	78,071		74,944
Prepaid expenses and other assets	17,319		17,816
Goodwill	416,821		416,821
Intangible assets, net	455,116		472,879
Deferred tax assets, net	616		4,386

Total assets	$	1,841,527	$	1,733,270

LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities
Accounts payable	$	13,325	$	11,816
Accrued expenses	118,314		100,678


Total current liabilities	131,639		112,494

Long-term debt, net	1,500,879		1,499,248
Other long-term liabilities	31,201		37,720


Total liabilities	1,663,719		1,649,462
Commitments and contingencies (Note 11)
Stockholders’ equity
Preferred stock - $0.001 par value; 20,000 shares authorized; no shares issued and outstanding	—		—
Common stock - $0.001 par value; 300,000 shares authorized; 127,186 and 126,770 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	127		127
Additional paid-in capital	11,794		2,409
Accumulated other comprehensive loss	(1,486)		(9,278)
Retained earnings	167,373		90,550
Total stockholders’ equity	177,808		83,808
Total liabilities and stockholders’ equity	$	1,841,527	$	1,733,270

See accompanying notes to condensed consolidated financial statements.

HALOZYME THERAPEUTICS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

(In thousands, except per share amounts)


	Three Months Ended March 31,
	2024		2023
Revenues
Royalties	$	120,593	$	99,640
Product sales, net	58,583		60,794
Revenues under collaborative agreements	16,703		1,709
Total revenues	195,879		162,143
Operating expenses
Cost of sales	28,329		35,170
Amortization of intangibles	17,763		17,835
Research and development	19,111		17,979
Selling, general and administrative	35,134		37,357
Total operating expenses	100,337		108,341
Operating income	95,542		53,802
Other income (expense)
Investment and other income, net	4,993		2,979


Interest expense	(4,507)		(4,543)
Net income before income taxes	96,028		52,238
Income tax expense	19,205		12,623
Net income	$	76,823	$	39,615

Earnings per share
Basic	$	0.61	$	0.29
Diluted	$	0.60	$	0.29

Weighted average common shares outstanding
Basic	126,941		135,027
Diluted	128,887		137,900

See accompanying notes to condensed consolidated financial statements.

HALOZYME THERAPEUTICS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

(In thousands)


	Three Months Ended March 31,
	2024		2023
Net income	$	76,823	$	39,615
Other comprehensive income
Unrealized (loss) gain on marketable securities	(313)		924
Foreign currency translation adjustment	8		22

Unrealized gain on derivative instruments, net	8,615		—
Realized gain on derivative instruments, net	(518)		—
Comprehensive income	$	84,615	$	40,561

See accompanying notes to condensed consolidated financial statements.

HALOZYME THERAPEUTICS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In thousands)


	Three Months Ended March 31,

	2024		2023
Operating activities
Net income	$	76,823	$	39,615
Adjustments to reconcile net income to net cash provided by operating activities
Share-based compensation	9,874		7,966
Depreciation and amortization	2,443		2,622
Amortization of intangible assets	17,763		17,835
Amortization of debt discount	1,830		1,835
Amortization of premium on marketable securities, net	(2,365)		(917)
Realized gain on marketable securities	(7)		—




Lease payments deferred	220		320



Deferred income taxes	1,291		3,874

Changes in operating assets and liabilities
Accounts receivable, net and other contract assets	38,308		36,189
Inventories, net	(40,233)		(7,250)
Prepaid expenses and other assets	4,795		8,881
Accounts payable and accrued expenses	18,685		(24,006)
Net cash provided by operating activities	129,427		86,964
Investing activities
Purchases of marketable securities	(198,763)		(109,919)
Proceeds from sales and maturities of marketable securities	119,627		61,134

Purchases of property and equipment	(3,545)		(11,377)

Net cash used in investing activities	(82,681)		(60,162)
Financing activities






Repayment of 2024 Convertible Notes	—		(13,483)



Repurchase of common stock	—		(150,083)
Taxes paid related to net share settlement, net of proceeds from issuance of common stock under equity incentive plans	(489)		(1,048)
Net cash used in financing activities	(489)		(164,614)
Net increase (decrease) in cash, cash equivalents and restricted cash	46,257		(137,812)
Cash, cash equivalents and restricted cash at beginning of period	118,370		234,695
Cash, cash equivalents and restricted cash at end of period	$	164,627	$	96,883

Supplemental disclosure of non-cash investing and financing activities
Amounts accrued for purchases of property and equipment	$	1,515	$	390
Right-of-use assets obtained in exchange for lease obligation	$	1,242	$	406


Common stock issued for conversion of 2024 Convertible Notes	$	—	$	125

See accompanying notes to condensed consolidated financial statements.

HALOZYME THERAPEUTICS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited)

(in thousands)


	Three Months Ended March 31, 2024
	Common Stock			Additional Paid-In Capital		Accumulated Other Comprehensive (Loss) Income		Retained Earnings		Total Stockholders’ Equity
	Shares	Amount
BALANCE AS OF DECEMBER 31, 2023	126,770	$	127	$	2,409	$	(9,278)	$	90,550	$	83,808

Share-based compensation expense	—	—		9,874		—		—		9,874

Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net	416	—		(489)		—		—		(489)



Other comprehensive income	—	—		—		7,792		—		7,792
Net income	—	—		—		—		76,823		76,823
BALANCE AS OF MARCH 31, 2024	127,186	$	127	$	11,794	$	(1,486)	$	167,373	$	177,808

















	Three Months Ended March 31, 2023
	Common Stock			Additional Paid-In Capital		Accumulated Other Comprehensive (Loss) Income		Retained Earnings		Total Stockholders’ Equity
	Shares	Amount
BALANCE AS OF DECEMBER 31, 2022	135,154	$	135	$	27,368	$	(922)	$	143,217	$	169,798

Share-based compensation expense	—	—		7,966		—		—		7,966
Issuance of common stock for the conversion of the 2024 Convertible Notes	289	—		(126)						(126)
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net	384	1		(1,049)		—		—		(1,048)


Repurchase of common stock	(4,165)	(4)		(34,159)				(117,138)		(151,301)

Other comprehensive income	—	—		—		946		—		946
Net income	—	—		—		—		39,615		39,615
BALANCE AS OF MARCH 31, 2023	131,662	$	132	$	—	$	24	$	65,694	$	65,850

See accompanying notes to condensed consolidated financial statements.

HALOZYME THERAPEUTICS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Organization and Business

Halozyme Therapeutics, Inc. is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies.

As the innovators of ENHANZE® drug delivery technology (“ENHANZE”) with our proprietary enzyme, rHuPH20, our commercially validated solution is used to facilitate the subcutaneous (“SC”) delivery of injected drugs and fluids with the goal of reducing the treatment burden for patients. We license our technology to biopharmaceutical companies to collaboratively develop products that combine ENHANZE with our partners’ proprietary compounds. We also develop, manufacture and commercialize, for ourselves or with our partners, drug-device combination products using our advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence.

Our ENHANZE partners’ approved products and product candidates are based on rHuPH20, our patented recombinant human hyaluronidase enzyme. rHuPH20 works by breaking down hyaluronan (“HA”), a naturally occurring carbohydrate that is a major component of the extracellular matrix of the SC space. This temporarily reduces the barrier to bulk fluid flow allowing for improved and more rapid SC delivery of high dose, high volume injectable biologics, such as monoclonal antibodies and other large therapeutic molecules, as well as small molecules and fluids. We refer to the application of rHuPH20 to facilitate the delivery of other drugs or fluids as ENHANZE. We license our ENHANZE technology to form collaborations with biopharmaceutical companies that develop or market drugs requiring or benefiting from injection via the SC route of administration. In the development of proprietary intravenous (“IV”) drugs combined with our ENHANZE technology, data has been generated supporting the potential for ENHANZE to reduce patient treatment burden, as a result of shorter duration of SC administration with ENHANZE compared to IV administration. ENHANZE may enable fixed-dose SC dosing compared to weight-based dosing typically required for IV administration, extend the dosing interval for drugs that are already administered subcutaneously and potentially allow for lower rates of infusion-related reactions. ENHANZE may enable more flexible treatment options such as home administration by a healthcare professional or potentially the patient or caregiver. Lastly, certain proprietary drugs co-formulated with ENHANZE have been granted additional exclusivity, extending the patent life of the product beyond the patent expiry of the proprietary IV drug.

We currently have ENHANZE collaborations and licensing agreements with F. Hoffmann-La Roche, Ltd. and Hoffmann-La Roche, Inc. (“Roche”), Takeda Pharmaceuticals International AG and Baxalta US Inc. (“Takeda”), Pfizer Inc. (“Pfizer”), Janssen Biotech, Inc. (“Janssen”), AbbVie, Inc. (“AbbVie”), Eli Lilly and Company (“Lilly”), Bristol-Myers Squibb Company (“BMS”), argenx BVBA (“argenx”), ViiV Healthcare (the global specialist HIV Company majority owned by GlaxoSmithKline) (“ViiV”), Chugai Pharmaceutical Co., Ltd. (“Chugai”) and Acumen Pharmaceuticals, Inc. (“Acumen”). In addition to receiving upfront licensing fees from our ENHANZE collaborations, we are entitled to receive event and sales-based milestone payments, revenues from the sale of bulk rHuPH20 and royalties from commercial sales of approved partner products co-formulated with ENHANZE. We currently earn royalties from sales of seven commercial products including sales of one commercial product from each of the Takeda, Janssen and argenx collaborations and four commercial products products from the Roche collaboration.

We have commercialized auto-injector products with several pharmaceutical companies including Teva Pharmaceutical Industries, Ltd. (“Teva”) and Otter Pharmaceuticals, LLC (“Otter”). We have development programs including auto-injectors with Idorsia Pharmaceuticals Ltd. (“Idorsia”).

Our commercial portfolio of proprietary products includes Hylenex®, utilizing rHuPH20, and XYOSTED®, utilizing our auto-injector technology.

Except where specifically noted or the context otherwise requires, references to “Halozyme,” “the Company,” “we,” “our,” and “us” in these notes to our condensed consolidated financial statements refer to Halozyme Therapeutics, Inc. and each of its directly and indirectly wholly owned subsidiaries as disclosed in Note 2, Summary of Significant Accounting Policies.

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying interim unaudited condensed consolidated financial statements have been prepared for purposes of and in accordance with United States generally accepted accounting principles (“U.S. GAAP”) and with the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) related to a quarterly report on Form 10-Q. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for a complete set of financial statements. These condensed consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2023, filed with the SEC on February 20, 2024. The unaudited financial information for the interim periods presented herein reflects all adjustments which, in the opinion of management, are necessary for a fair presentation of the financial condition and results of operations for the periods presented, with such adjustments consisting only of normal recurring adjustments. Operating results for interim periods are not necessarily indicative of the operating results for an entire fiscal year.

The accompanying condensed consolidated financial statements include the accounts of Halozyme Therapeutics, Inc. and our wholly owned subsidiaries, Halozyme, Inc. and Antares Pharma, Inc., and Antares Pharma, Inc.’s wholly owned Swiss subsidiaries, Antares Pharma IPL AG and Antares Pharma AG. All intercompany accounts and transactions have been eliminated.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in our condensed consolidated financial statements and accompanying notes. On an ongoing basis, we evaluate our estimates and judgments, which are based on historical and anticipated results and trends and on various other assumptions that we believe to be reasonable under the circumstances. By their nature, estimates are subject to an inherent degree of uncertainty and, as such, actual results may differ from our estimates.

Cash Equivalents and Marketable Securities

Cash equivalents consist of highly liquid investments, readily convertible to cash, which mature within 90 days or less from the date of purchase. As of March 31, 2024, our cash and cash equivalents consisted of money market funds, bank certificate of deposits, U.S. treasury securities and demand deposits at commercial banks.

Marketable securities are investments with original maturities of more than 90 days from the date of purchase that are specifically identified to fund current operations. Marketable securities are considered available-for-sale. These investments are classified as current assets, even though the stated maturity date may be one year or more beyond the current balance sheet date which reflects management’s intention to use the proceeds from the sale of these investments to fund our operations, as necessary. Such available-for-sale investments are carried at fair value with unrealized gains and losses recorded in other comprehensive income and included as a separate component of stockholders’ equity. The cost of marketable securities is adjusted for amortization of premiums or accretion of discounts to maturity, and such amortization or accretion is included in investment and other income, net in our condensed consolidated statements of income. We use the specific identification method for calculating realized gains and losses on marketable securities sold. None of the realized gains and losses and declines in value that were judged to be as a result of credit loss on marketable securities, if any, are included in investment and other income, net in our condensed consolidated statements of income.

Fair Value of Financial Instruments

The authoritative guidance for fair value measurements establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

Our financial instruments include cash equivalents, available-for-sale marketable securities, accounts receivable, prepaid expenses and other assets, accounts payable, accrued expenses and long-term debt. Fair value estimates of these instruments are made at a specific point in time based on relevant market information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and therefore, cannot be determined with precision. The carrying amount of cash equivalents, accounts receivable, prepaid expenses and other assets, accounts payable and accrued expenses are generally considered to be representative of their respective fair values because of the short-term nature of those instruments.

Available-for-sale marketable securities consist of asset-backed securities, corporate debt securities, U.S. Treasury securities, agency bonds and commercial paper, and are measured at fair value using Level 1 and Level 2 inputs. Level 2 financial instruments are valued using market prices on less active markets and proprietary pricing valuation models with observable inputs, including interest rates, yield curves, maturity dates, issue dates, settlement dates, reported trades, broker-dealer quotes, issue spreads, benchmark securities or other market related data. We obtain the fair value of Level 2 investments from our investment manager, who obtains these fair values from a third-party pricing source. We validate the fair values of Level 2 financial instruments provided by our investment manager by comparing these fair values to a third-party pricing source.

Accounts Receivable, net

Accounts receivable is recorded at the invoiced amount and is non-interest bearing. Accounts receivable is recorded net of estimated prompt pay discounts, distribution fees and chargebacks. We believe the risk of accounts being uncollectible is minimal; therefore, no significant allowances for doubtful accounts were established as of March 31, 2024 and December 31, 2023.

Inventories

Inventories are stated at lower of cost or net realizable value. Cost is determined on a first-in, first-out basis. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Inventories are reviewed periodically for potential excess, dated or obsolete status. We evaluate the carrying value of inventories on a regular basis, taking into account such factors as historical and anticipated future sales compared to quantities on hand, the price we expect to obtain for products in their respective markets compared with historical cost and the remaining shelf life of goods on hand.

Leases

We have entered into operating leases primarily for real estate and automobiles. These leases have contractual terms which range from 3 years to 12 years. We determine if an arrangement contains a lease at inception. Right of use (“ROU”) assets and liabilities resulting from operating leases are included in property and equipment, accrued expenses and other long-term liabilities on our condensed consolidated balance sheets. Operating lease ROU assets and liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the discount rate to calculate the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. Our leases often include options to extend or terminate the lease. These options are included in the lease term when it is reasonably certain that we will exercise that option. Short-term leases with an initial term of 12 months or less are not recorded on our condensed consolidated balance sheet. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

We have lease agreements with lease and non-lease components, which are generally accounted for separately. For certain leases, such as automobiles, we account for the lease and non-lease components as a single lease component.

Property and Equipment, Net

Property and equipment, including ROU assets are recorded at cost, less accumulated depreciation and amortization. Equipment is depreciated using the straight-line method over its estimated useful life ranging from three years to ten years and leasehold improvements are amortized using the straight-line method over the estimated useful life of the asset or the lease term, whichever is shorter.

Impairment of Long-Lived Assets

We account for long-lived assets in accordance with authoritative guidance for impairment or disposal of long-lived assets. Long-lived assets are reviewed for events or changes in circumstances, which indicate that their carrying value may not be recoverable.

Comprehensive Income

Comprehensive income is defined as the change in equity during the period from transactions and other events and circumstances from non-owner sources.

Convertible Notes

The 2024 Convertible Notes, the 2027 Convertible Notes and the 2028 Convertible Notes (collectively, the “Convertible Notes”) are accounted for in accordance with authoritative guidance for debt and derivatives. We evaluate all the embedded conversion options contained in the Convertible Notes to determine if there are embedded features that require bifurcation as a derivative as required by U.S. GAAP. Based on our analysis, we account for each of our Convertible Notes as single units of accounting, a liability, because we concluded that the conversion features do not require bifurcation as a derivative under embedded derivative authoritative guidance.

Cash Flow Hedges - Currency Risks

Beginning in the second quarter of 2023, we entered into a cash flow hedging program to mitigate foreign currency exchange risk associated with forecasted royalty revenue denominated in Swiss francs. Under the program, we can hedge these forecasted royalties up to a maximum of four years into the future. We hedge these cash flow exposures to reduce the risk of our earnings and cash flows being adversely affected by fluctuations in exchange rates.

In accordance with the hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge and are highly effective in offsetting changes to future cash flows on hedged transactions. Both at inception of the hedge and on an ongoing basis, we assess whether the foreign currency forward contracts are highly effective in offsetting changes in cash flows of hedged items on a prospective and retrospective basis. If we determine a (i) foreign currency forward contract is not highly effective as a cash flow hedge, (ii) foreign currency forward contract has ceased to be a highly effective hedge or (iii) forecasted transaction is no longer probable of occurring, we would discontinue hedge accounting treatment prospectively. We measure effectiveness based on the change in fair value of the forward currency forward contract and the fair value of the hypothetical foreign currency forward contract with terms that match the critical terms of the risk being hedged. No portion of our foreign currency forward contracts were excluded from the assessment of hedge effectiveness. As of March 31, 2024, all hedges were determined to be highly effective.

The assets or liabilities associated with our hedging contracts are recorded at fair market value in prepaid expense and other current assets, accrued expenses, or other long-term liabilities, respectively, in our condensed consolidated balance sheets. Gains and losses related to changes in the fair market value of these hedging contracts are recorded as a component of accumulated other comprehensive income (loss) (“AOCI”) within stockholder’s equity in our condensed consolidated balance sheets and reclassified to royalty revenue in our condensed consolidated statements of income in the same period as the recognition of the underlying hedged transaction. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, within the defined hedge period, we reclassify the gains or losses on the related cash flow hedge from AOCI to royalties revenue in our condensed consolidated statements of income. Settlements from the cash flow hedge are included in operating activities on the condensed consolidated statements of cash flows. Since the fair market value of these hedging contracts is derived from current market rates, the hedging contracts are classified as derivative financial instruments. We do not use derivatives for speculative or trading purposes. As of March 31, 2024, amounts expected to be recognized as a net gain out of AOCI into our condensed consolidated statements of income during the next 12 months are not material.

Business Combinations

Under the acquisition method of accounting, we allocate the fair value of the total consideration transferred to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values on the date of acquisition. These valuations require us to make estimates and assumptions, especially with respect to intangible assets. We record the excess consideration over the aggregate fair value of tangible and intangible assets, net of liabilities assumed, as goodwill. Costs incurred to complete a business combination, such as legal and other professional fees, are expensed as incurred.

If the initial accounting for a business combination is incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. We record these adjustments to the provisional amounts with a corresponding offset to goodwill. Any adjustments identified after the measurement period are recorded in our condensed consolidated statements of income.

Goodwill, Intangible Assets and Other Long-Lived Asset

Assets acquired, including intangible assets and in-process research and development (“IPR&D”), and liabilities assumed are measured at fair value as of the acquisition date. Goodwill, which has an indefinite useful life, represents the excess of cost over fair value of the net assets acquired. Intangible assets acquired in a business combination that are used for IPR&D activities are considered indefinite lived until the completion or abandonment of the associated research and development efforts. Upon reaching the end of the relevant research and development project (i.e., upon commercialization), the IPR&D

asset is amortized over its estimated useful life. If the relevant research and development project is abandoned, the IPR&D asset is expensed in the period of abandonment.

Goodwill and IPR&D are not amortized; however, they are reviewed for impairment at least annually during the second quarter, or more frequently if an event occurs indicating the potential for impairment. Goodwill and IPR&D are considered to be impaired if the carrying value of the reporting unit or IPR&D asset exceeds its respective fair value.

We perform our goodwill impairment analysis at the reporting unit level, which aligns with our reporting and operating segment structure and availability of discrete financial information. During the goodwill impairment review, we assess qualitative factors to determine whether it is more likely than not that the fair values of our reporting unit is less than the carrying amount, including goodwill. The qualitative factors include, but are not limited to, macroeconomic conditions, industry and market considerations, and our overall financial performance. If, after assessing the totality of these qualitative factors, we determine that it is not more likely than not that the fair value of our reporting unit is less than the carrying amounts, then no additional assessment is deemed necessary. Otherwise, we proceed to compare the estimated fair value of the reporting unit with the carrying value, including goodwill. If the carrying amount of the reporting unit exceeds the fair value, we record an impairment loss based on the difference. We may elect to bypass the qualitative assessment in a period and proceed to perform the quantitative goodwill impairment test.

Our identifiable intangible assets with finite useful lives are typically comprised of acquired device technologies and product rights. The cost of identifiable intangible assets with finite lives is generally amortized on a straight-line basis over the assets’ respective estimated useful lives.

We perform regular reviews to determine if any event has occurred that may indicate intangible assets with finite useful lives and other long-lived assets are potentially impaired. If indicators of impairment exist, an impairment test is performed to assess the recoverability of the affected assets by determining whether the carrying amount of such assets exceeds the undiscounted expected future cash flows. If the affected assets are not recoverable, we estimate the fair value of the assets and record an impairment loss if the carrying value of the assets exceeds the fair value. Factors that may indicate potential impairment include a significant decline in our stock price and market capitalization compared to the net book value, significant changes in the ability of a particular asset to generate positive cash flows for our strategic business objectives, and the pattern of utilization of a particular asset.

Revenue Recognition

We generate revenues from payments received (i) as royalties from licensing our ENHANZE technology and other royalty arrangements, (ii) under collaborative agreements and (iii) from sales of our proprietary and partnered products. We recognize revenue when we transfer promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. To determine revenue recognition for contracts with customers, we perform the following five steps: (i) identify the promised goods or services in the contract; (ii) identify the performance obligations in the contract, including whether they are distinct in the context of the contract; (iii) determine the transaction price, including the constraint on variable consideration; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy the performance obligations.

ENHANZE and Device Royalties

Under the terms of our ENHANZE collaboration and license agreements, our partners will pay us royalties at an on average mid-single digit percent rate of their sales if products under the collaboration are commercialized. All amounts owed to us are noncancelable after the underlying triggering event occurs, and nonrefundable once paid. Unless terminated earlier in accordance with its terms, collaborations generally continue in effect until the last to expire royalty payment term, as determined on a product by product and country by country basis, with each royalty term starting on the first commercial sale of that product and ending the later of: (i) a specified period or term set forth in the agreement or (ii) expiration of the last to expire of the valid claims of our patents covering rHuPH20 or other specified patents developed under the collaboration which valid claim covers a product developed under the collaboration. In general, when there are no valid claims of a specified patent developed under the collaboration covering the product in a given country, the royalty rate is reduced for those sales in that country upon the expiration of our patents covering rHuPH20. Janssen’s patents covering DARZALEX SC do not impact the timing for this royalty reduction. Partners may terminate the agreement prior to expiration for any reason in its entirety or on a target-by-target basis generally upon 90 days prior written notice to us. Upon any such termination, the license granted to partners (in total or with respect to the terminated target, as applicable) will terminate provided; however, that in the event of expiration of the agreement (as opposed to a termination), the on-going licenses granted may become perpetual, non-exclusive and fully paid. Sales-based milestones and royalties are recognized in the period the underlying sales or milestones occur. We do not receive final royalty reports from our ENHANZE partners until after we complete our financial statements for a prior quarter. Therefore, we recognize revenue based on estimates of the royalty earned, which are based on internal estimates and available preliminary reports provided by our partners. We will record adjustments in the following quarter, if necessary, when final royalty reports are received. To date, we have not recorded any material adjustments.

We also earn royalties in connection with several of our licenses granted under license and development arrangements with our device partners. These royalties are based upon a percentage of commercial sales of partnered products with rates ranging from mid-single digits to low double digits and are tiered based on levels of net sales. These sales-based royalties, for which the license was deemed the predominant element to which the royalties relate, are estimated and recognized in the period in which the partners’ commercial sales occur. The royalties are generally reported and payable to us within 45 to 60 days after the end of the period in which the commercial sales are made. We base our estimates of royalties earned on actual sales information from our partners when available or estimated, prescription sales from external sources and estimated net selling price. We will record adjustments in the following quarter, if necessary, when final royalty reports are received. To date, we have not recorded any material adjustments.

Revenue under ENHANZE and Device Collaborative Agreements

ENHANZE Collaboration and License Agreements

Under these agreements, we grant the collaboration partner a worldwide license to develop and commercialize products using our ENHANZE technology to combine our patented rHuPH20 enzyme with their proprietary biologics directed at up to a specified number of targets. Targets are usually licensed on an exclusive, global basis. Targets selected subsequent to inception of the arrangement generally require payment of an additional license fee. The collaboration partner is responsible for all development, manufacturing, clinical, regulatory, sales and marketing costs for any products developed under the agreement. We are responsible for supply of bulk rHuPH20 based on the collaboration partner’s purchase orders, and may also be separately engaged to perform research and development services. While these collaboration agreements are similar in that they originate from the same framework, each one is the result of an arms-length negotiation and thus may vary from one to the other.

We generally collect an upfront license payment from collaboration partners, and are also entitled to receive event-based payments subject to collaboration partners’ achievement of specified development, regulatory and sales-based milestones. In several agreements, collaboration partners pay us annual fees to maintain their exclusive license rights if they are unable to advance product development to specified stages. We earn separate fees for bulk rHuPH20 supplies and research and development services.

Although these agreements are in form identified as collaborative agreements, we concluded for accounting purposes they represent contracts with customers and are not subject to accounting literature on collaborative arrangements. This is because we grant to partners licenses to our intellectual property and provide supply of bulk rHuPH20 and research and development services which are all outputs of our ongoing activities, in exchange for respective consideration. Under these collaborative agreements, our partners lead development of assets, and we do not share in significant financial risks of their development or commercialization activities. Accordingly, we concluded our collaborative agreements are appropriately accounted for pursuant to U.S. GAAP.

Under all of our ENHANZE collaborative agreements, we have identified licenses to use functional intellectual property as the only performance obligation. The intellectual property underlying the license is our proprietary ENHANZE technology which represents application of rHuPH20 to facilitate delivery of drugs. Each of the licenses grants the partners rights to use our intellectual property as it exists and is identified on the effective date of the license, because there is no ongoing development of the ENHANZE technology required. Therefore, we recognize revenue from licenses at the point when the license becomes effective and the partner has received access to our intellectual property, usually at the inception of the agreement.

When partners can select additional targets to add to the licenses granted, we consider these rights to be options. We evaluate whether such options contain material rights, i.e. have exercise prices that are discounted compared to what we would charge for a similar license to a new partner. The exercise price of these options includes a combination of the target selection fees, event-based milestone payments and royalties. When these amounts in aggregate are not offered at a discount that exceeds discounts available to other customers, we conclude the option does not contain a material right, and we consider grants of additional licensing rights upon option exercises to be separate contracts (target selection contracts).

Generally, we provide indemnification and protection of licensed intellectual property for our customers. These provisions are part of assurance that the licenses meet the agreements’ representations and are not obligations to provide goods or services.

We also fulfill purchase orders for supply of bulk rHuPH20 and perform research and development services pursuant to project authorization forms for our partners, which represent separate contracts. In addition to our licenses, we price our supply of bulk rHuPH20 and research and development services at our regular selling prices, called standalone selling prices (“SSP”). Therefore, our partners do not have material rights to order these items at prices not reflective of SSP. Refer to the discussion below regarding recognition of revenue for these separate contracts.

Transaction price for a contract represents the amount to which we are entitled in exchange for providing goods and services to the customer. Transaction price does not include amounts subject to uncertainties unless it is probable that there will be no significant reversal of revenue when the uncertainty is resolved. Apart from the upfront license payment (or target selection fees in the target selection contracts), all other fees we may earn under our collaborative agreements are subject to significant uncertainties of product development. Achievement of many of the event-based development and regulatory milestones may not be probable until such milestones are actually achieved. This generally relates to milestones such as obtaining marketing authorization approvals. With respect to other development milestones, e.g., dosing of a first patient in a clinical trial, achievement could be considered probable prior to its actual occurrence, based on the progress towards commencement of the trial. In order to evaluate progress towards commencement of a trial, we assess the status of activities leading up to our partner’s initiation of a trial such as feedback received from the applicable regulatory authorities, completion of Investigational New Drug (“IND”) or equivalent filings, readiness and availability of drug, readiness of study sites and our partner’s commitment of resources to the program. We do not include any amounts subject to uncertainties in the transaction price until it is probable that the amount will not result in a significant reversal of revenue in the future. At the end of each reporting period, we re-evaluate the probability of achievement of such milestones and any related constraint, and if necessary, adjust our estimate of the overall transaction price.

When target exchange rights are held by partners, and the amounts attributed to these rights are not refundable, they are included in the transaction price. However, they are recorded as deferred revenues because we have a potential performance obligation to provide a new target upon an exchange right being exercised. These amounts are recognized in revenue when the right of exchange expires or is exercised.

Because our agreements have one type of performance obligation (licenses) which are typically all transferred at the same time at agreement inception, allocation of transaction price often is not required. However, allocation is required when licenses for some of the individual targets are subject to rights of exchange, because revenue associated with these targets cannot be recognized. When allocation is needed, we perform an allocation of the upfront amount based on relative SSP of licenses for individual targets. We determine license SSP using an income-based valuation approach utilizing risk-adjusted discounted cash flow projections of the estimated return a licensor would receive. When amounts subject to uncertainties, such as milestones and royalties, are included in the transaction price, we attribute them to the specific individual target licenses which generate such milestone or royalty amounts.

We also estimate SSP of bulk rHuPH20 and research and development services, to determine that our partners do not have material rights to order them at discounted prices. For supplies of bulk rHuPH20, because we effectively act as a contract manufacturer to our partners, we estimate and charge SSP based on the typical contract manufacturer margins consistent with all of our partners. We determine SSP of research and development services based on a fully-burdened labor rate. Our rates are comparable to those we observe in other collaborative agreements. We also have a history of charging similar rates to all of our partners.

Upfront amounts allocated to licenses to individual targets are recognized as revenue when the license is transferred to the partner, as discussed above, if the license is not subject to exchange rights, or when the exchange right expires or is exercised. Development milestones and other fees are recognized in revenue when they are included in the transaction price, because by that time, we have already transferred the related license to the partner.

In contracts to provide research and development services, such services represent the only performance obligation. The fees are charged based on hours worked by our employees and the fixed contractual rate per hour, plus third-party pass-through costs, on a monthly basis. We recognize revenues as the related services are performed based on the amounts billed, as the partner consumes the benefit of research and development work simultaneously as we perform these services, and the amounts billed reflect the value of these services to the customer.

Device License, Development and Supply Arrangements

We have several license, development and supply arrangements with pharmaceutical partners, under which we grant a license to our device technology and provide research and development services that often involve multiple performance obligations and highly-customized deliverables. For such arrangements, we identify each of the promised goods and services within the contract and the distinct performance obligations at inception of the contract and allocate consideration to each performance obligation based on relative SSP, which is generally determined based on the expected cost plus mark-up.

If the contract includes an enforceable right to payment for performance completed to date and performance obligations are satisfied over time, we recognize revenue over the development period using either the input or output method depending on which is most appropriate given the nature of the distinct deliverable. For other contracts that do not contain an enforceable right to payment for performance completed to date, revenue is recognized when control of the product is transferred to the customer. Factors that may indicate transfer of control has occurred include the transfer of legal title, transfer of physical possession, the customer has obtained the significant risks and rewards of ownership of the assets, and we have a present right to payment.

Our payment terms for development contracts may include an upfront payment equal to a percentage of the total contract value with the remaining portion to be billed upon completion and transfer of the individual deliverables or satisfaction of the individual performance obligations. We record a contract liability for cash received in advance of performance, which is presented within deferred revenue and deferred revenue, long-term in our condensed consolidated balance sheets and recognized as revenue in our condensed consolidated statements of income when the associated performance obligations have been satisfied.

License fees and milestones received in exchange for the grant of a license to our functional intellectual property, such as patented technology and know-how in connection with a partnered development arrangement, are generally recognized at inception of the arrangement, or over the development period depending on the facts and circumstances, as the license is generally not distinct from the non-licensed goods or services to be provided under the contract. Milestone payments that are contingent upon the occurrence of future events are evaluated and recorded at the most likely amount, and to the extent that it is probable that a significant reversal of revenue will not occur when the associated uncertainty is resolved.

Refer to Note 4, Revenue, for further discussion on our collaborative arrangements.

Product Sales, Net

Proprietary Product Sales

Our commercial portfolio of proprietary products includes XYOSTED and Hylenex recombinant which we sell primarily to wholesale pharmaceutical distributors and specialty pharmacies, who sell the products to hospitals, retail chain drug stores and other end-user customers. Sales to wholesalers are made pursuant to purchase orders subject to the terms of a master agreement, and delivery of individual packages of products represents performance obligations under each purchase order. We use contract manufacturers to produce our proprietary products and third-party logistics (“3PL”) vendors to process and fulfill orders. We concluded we are the principal in the sales to wholesalers because we control access to services rendered by both vendors and direct their activities. We have no significant obligations to wholesalers to generate pull-through sales.

Revenue is recognized when control has transferred to the customer, which is typically upon delivery, at the net selling price, which reflects the variable consideration for which reserves and sales allowances are established for estimated returns, wholesale distribution fees, prompt payment discounts, government rebates and chargebacks, plan rebate arrangements and patient discount and support programs. We recognize revenue from product sales and related cost of sales upon product delivery to the wholesaler location. At that time, the wholesalers take control of the product as they take title, bear the risk of loss of ownership, and have an enforceable obligation to pay us. They also have the ability to direct sales of product to their customers on terms and at prices they negotiate. Although wholesalers have product return rights, we do not believe they have a significant incentive to return the product to us.

The determination of certain reserves and sales allowances requires us to make a number of judgements and estimates to reflect our best estimate of the transaction price and the amount of consideration to which we believe we would be ultimately entitled to receive. The expected value is determined based on unit sales data, contractual terms with customers and third-party payers, historical and estimated future percentage of rebates incurred on sales, historical and future insurance plan billings, any new or anticipated changes in programs or regulations that would impact the amount of the actual rebates, customer purchasing patterns, product expiration dates and levels of inventory in the distribution channel. The estimated amounts of credit for product returns, chargebacks, distribution fees, prompt payment discounts, rebates and customer co-pay support programs are included in accrued expenses and accounts receivable, net in our condensed consolidated balance sheets upon recognition of revenue from product sales. We monitor actual product returns, chargebacks, discounts and fees subsequent to the sale. If these amounts differ from our estimates, we make adjustments to these allowances, which are applied to increase or reduce product sales revenue and earnings in the period of adjustment.

Selling prices initially billed to wholesalers are subject to discounts for prompt payment and subsequent chargebacks when wholesalers sell our products at negotiated discounted prices to members of certain group purchasing organizations (“GPOs”), Pharmacy Benefit Managers (“PBMs”) and government programs. We also pay quarterly distribution fees to certain wholesalers for inventory reporting and chargeback processing, and to PBMs and GPOs as administrative fees for services and for access to their members. We concluded the benefits received in exchange for these fees are not distinct from our sales of our products, and accordingly we apply these amounts to reduce revenues. Wholesalers also have rights to return unsold product nearing or past the expiration date. Because of the shelf life of our products and our lengthy return period, there may be a significant period of time between when the product is shipped and when we issue credits on returned product.

We estimate the transaction price when we receive each purchase order taking into account the expected reductions of the selling price initially billed to the wholesaler arising from all of the above factors. We have compiled historical experience and data to estimate future returns and chargebacks of our products and the impact of the other discounts and fees we pay. When estimating these adjustments to the transaction price, we reduce it sufficiently to be able to assert that it is probable that there will be no significant reversal of revenue when the ultimate adjustment amounts are known.

Each purchase order contains only one type of product, and is usually shipped to the wholesaler in a single shipment. Therefore, allocation of the transaction price to individual packages is not required.

In connection with the orders placed by wholesalers, we incur costs such as commissions to our sales representatives. However, as revenue from product sales is recognized upon delivery to the wholesaler, which occurs shortly after we receive a purchase order, we do not capitalize these commissions and other costs, based on application of the practical expedient allowed within the applicable guidance.

Partnered Product Sales

Bulk rHuPH20

We sell bulk rHuPH20 to partners for use in research and development and, subsequent to receiving marketing approval, we sell it for use in collaboration commercial products. Sales are made pursuant to purchase orders subject to the terms of the collaborative agreement or a supply agreement, and delivery of units of bulk rHuPH20 represent performance obligations under each purchase order. We provide a standard warranty that the product conforms to specifications. We use contract manufacturers to produce bulk rHuPH20 and have concluded we are the principal in the sales to partners. The transaction price for each purchase order of bulk rHuPH20 is fixed based on the cost of production plus a contractual markup, and is not subject to adjustments. Allocation of the transaction price to individual quantities of the product is usually not required because each order contains only one type of product.

We recognize revenue from the sale of bulk rHuPH20 as product sales and related cost of sales upon transfer of title to our partners. At that time, the partners take control of the product, bear the risk of loss of ownership, and have an enforceable obligation to pay us.

Devices

We are party to several license, development, supply and distribution arrangements with pharmaceutical partners, under which we produce and are the exclusive supplier of certain products, devices and/or components. Revenue is recognized when or as control of the goods transfers to the customer as discussed below.

We are the exclusive supplier of OTREXUP® to Otter. Because this product is custom manufactured with no alternative use and we have a contractual right to payment for performance completed to date, control is continuously transferred to the customer as the product is produced pursuant to firm purchase orders. Revenue is recognized over time using the output method based on the contractual selling price and number of units produced. The amount of revenue recognized in excess of the amount shipped/billed to the customer, if any, is recorded as contract assets in our condensed consolidated balance sheets due to the short-term nature in which the amount is ultimately expected to be billed and collected from the customer.

Other device partnered product sales are recognized at the point in time in which control is transferred to the customer, which is typically upon shipment. Sales terms and pricing are governed by the respective supply and distribution agreements, and there is generally no right of return. Revenue is recognized at the transaction price, which includes the contractual per unit selling price and estimated variable consideration, such as volume-based pricing arrangements or profit-sharing arrangements, if any. We recognize revenue, including the estimated variable consideration we expect to receive for contract margin on future commercial sales, upon shipment of the goods to our partner. The estimated variable consideration is recognized at an amount we believe is not subject to significant reversal of revenue based on historical experience and is adjusted at each reporting period if the most likely amount of expected consideration changes or becomes fixed.

Cost of Sales

Cost of sales consists primarily of raw materials, third-party manufacturing costs, fill and finish costs, freight costs, internal costs and manufacturing overhead associated with the production of proprietary and partnered products. Cost of sales also consists of the write-down of excess, dated and obsolete inventories and the write-off of inventories that do not meet certain product specifications, if any.

Research and Development Expenses

Research and development expenses include salaries and benefits, allocation of facilities and other overhead expenses, research related manufacturing services, contract services, and other outside expenses related to manufacturing, preclinical and regulatory activities and our partner development platforms. Research and development expenses are charged to operating expenses as incurred when these expenditures relate to our research and development efforts and have no alternative future uses.

We are obligated to make upfront payments upon execution of certain research and development agreements. Advance payments, including nonrefundable amounts, for goods or services that will be used or rendered for future research and development activities are deferred. Such amounts are recognized as expense as the related goods are delivered or the related services are performed or such time when we do not expect the goods to be delivered or services to be performed.

Share-Based Compensation

We record compensation expense associated with stock options, restricted stock units (“RSUs”), performance stock units (“PSUs”) and shares issued under our employee stock purchase plan (“ESPP”) in accordance with the authoritative guidance for share-based compensation. The cost of employee services received in exchange for an award of an equity instrument is measured at the grant date, based on the estimated fair value of the award, and is recognized as expense on a straight-line basis over the requisite service period of the award. Share-based compensation expense for an award with a performance condition is recognized when the achievement of such performance condition is determined to be probable. If the outcome of such performance condition is not determined to be probable or is not met, no compensation expense is recognized and any previously recognized compensation expense is reversed. Forfeitures are recognized as a reduction of share-based compensation expense as they occur.

Income Taxes

We provide for income taxes using the liability method. Under this method, deferred income tax assets and liabilities are determined based on the differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases at each reporting period. We measure deferred tax assets and liabilities using enacted tax rates for the year in which the differences are expected to reverse. Significant judgment is required by management to determine our provision for income taxes, our deferred tax assets and liabilities, and any associated valuation allowances recorded against our net deferred tax assets, which are based on complex and evolving tax regulations. Deferred tax assets (“DTA”) and other tax benefits are recorded when they are more likely than not to be realized. On a quarterly basis, we assess the need for valuation allowance on our DTAs, weighing all positive and negative evidence, to assess if it is more-likely-than-not that some or all of our DTAs will be realized. We recorded a provision for income taxes of $19.2 million using an effective tax rate of 20% for the three months ended March 31, 2024. The difference between our effective tax rate and the U.S. federal statutory rate of 21% is primarily due to state income taxes, research and development credit generations, tax benefits on the Foreign Derived Intangible Income Deduction (“FDII”) (net of reserves), tax detriments on 162(m) and other share-based compensation.

Segment Information

We operate our business in one operating segment, which includes all activities related to the research, development and commercialization of our proprietary enzymes and devices. This segment also includes revenues and expenses related to (i) research and development and manufacturing activities conducted under our collaborative agreements with third parties, and (ii) product sales of proprietary and partnered products. The chief operating decision-maker (“CODM”), our Chief Executive Officer (“CEO”), reviews the operating results on an aggregate basis and manages the operations as a single operating segment.

Adoption and Pending Adoption of Recent Accounting Pronouncements

The following table provides a brief description of recently issued accounting standards, those adopted in the current period and those not yet adopted:

Standard

Description

Effective Date

Adoption Method

Effect on the Financial
Statements or Other Significant Matters

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.

The new standard is intended to improve annual and interim reportable segment disclosure requirements regardless of number of reporting units, primarily through enhanced disclosures of significant expenses. The amendment requires public entities to disclose significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit and loss.

Annual periods beginning after December 15, 2023 (our 2024 Form 10-K), and interim periods within fiscal years beginning after December 15, 2024 (our Q1 2025 Form 10-Q) - Early adoption is permitted, including adoption in an interim period

Retrospective

We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures.

The new guidance includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction.

Annual periods beginning after December 15, 2024 (our 2025 Form 10-K) - Early adoption is permitted

Prospective or Retrospective

We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.

3. Fair Value Measurement

Available-for-sale marketable securities consisted of the following (in thousands):


	March 31, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Asset-backed securities	$	2,384	$	—	$	(5)	$	2,379
Corporate debt securities	43,118		2		(64)		43,056
U.S. treasury securities	239,347		36		(106)		239,277

Agency bonds	9,180		—		(22)		9,158
Commercial paper	4,954		—		—		4,954
Total marketable securities, available-for-sale	$	298,983	$	38	$	(197)	$	298,824


	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Asset-backed securities	$	3,512	$	—	$	(8)	$	3,504
Corporate debt securities	6,022		1		(10)		6,013
U.S. treasury securities	175,996		200		(12)		176,184
Agency bonds	16,119		—		(16)		16,103

Commercial paper	15,826		—		—		15,826
Total marketable securities, available-for-sale	$	217,475	$	201	$	(46)	$	217,630

As of March 31, 2024, 33 available-for-sale marketable securities with a fair market value of $215.5 million were in a gross unrealized loss position of $0.2 million. Based on our review of these marketable securities, we believe none of the unrealized loss is as a result of a credit loss as of March 31, 2024 because we do not intend to sell these securities and it is not more-likely-than-not that we will be required to sell these securities before the recovery of their amortized cost basis.

The estimated fair value of our contractual maturities of available-for-sale debt securities were as follows (in thousands):


	March 31, 2024		December 31, 2023

Due within one year	$	235,059	$	197,633
Due after one year but within five years	63,765		19,997
Total estimated fair value of contractual maturities, available-for-sale	$	298,824	$	217,630

The following table summarizes, by major security type, our cash equivalents and available-for-sale marketable securities measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):


	March 31, 2024						December 31, 2023
	Level 1		Level 2		Total Estimated Fair Value		Level 1		Level 2		Total Estimated Fair Value
Assets
Cash equivalents
Money market funds	$	20,276	$	—	$	20,276	$	22,142	$	—	$	22,142
U.S. treasury securities	30,000		—		30,000		2,000		—		2,000


Available-for-sale marketable securities
Asset-backed securities	—		2,379		2,379		—		3,504		3,504
Corporate debt securities	—		43,056		43,056		—		6,013		6,013
U.S. treasury securities	239,277		—		239,277		176,184		—		176,184
Agency bonds	9,158		—		9,158		16,103		—		16,103

Commercial paper	—		4,954		4,954		—		15,826		15,826
Derivative instruments
Currency hedging contracts (1)	—		1,574		1,574		—		—		—
Total assets	$	298,711	$	51,963	$	350,674	$	216,429	$	25,343	$	241,772

Liabilities
Derivative instruments
Currency hedging contracts (1)	$	—	$	478	$	478	$	—	$	9,480	$	9,480

(1) Based on observable market transactions of spot currency rates, forward currency rates or equivalently-termed instruments. Carrying amounts of the financial assets and liabilities are equal to the fair value. As of March 31, 2024, the derivative assets and liabilities recorded within prepaid expenses and other current assets, prepaid expense and other assets and other long-term liabilities in our condensed consolidated balance sheets were $1.3 million, $0.3 million and $0.5 million, respectively.

We had no available for sale securities that were classified within Level 3 as of March 31, 2024 and December 31, 2023.

4. Revenue

Our disaggregated revenues were as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Royalties	$	120,593	$	99,640

Product sales, net
Proprietary product sales	35,254		27,961
Bulk rHuPH20 sales	10,511		22,069
Device partnered product sales	12,818		10,764
Total product sales, net	58,583		60,794

Revenues under collaborative agreements

Event-based development and regulatory milestones and other fees	14,000		—

Device licensing and development revenue	2,703		1,709
Total revenues under collaborative agreements	16,703		1,709

Total revenues	$	195,879	$	162,143

During the three months ended March 31, 2024, we recognized revenue related to licenses granted to partners in prior periods in the amount of $134.6 million. This amount represents royalties earned in the current period in addition to $14.0 million of variable consideration in the contracts where uncertainties were resolved and the development milestones are expected to be achieved or were achieved. We also recognized revenue of $0.1 million during the three months ended March 31, 2024 that had been included in accrued expense and other long-term liabilities in our condensed consolidated balance sheets as of December 31, 2023.

Accounts receivable, other contract assets and deferred revenues (contract liabilities) from contracts with customers, including partners, consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Accounts receivable, net	$	185,313	$	233,254
Other contract assets	10,589		956
Deferred revenues	4,595		4,048

As of March 31, 2024, the amounts included in the transaction price of our contracts with customers, including collaboration partners, and allocated to goods and services not yet provided were $77.3 million, of which $72.7 million relates to unfulfilled product purchase orders and $4.6 million has been collected and is reported as accrued expense and other long-term liabilities in our condensed consolidated balance sheets. The unfulfilled product purchase orders are estimated to be delivered by the end of 2024. Of the total deferred revenues of $4.6 million, $1.2 million is expected to be used by our customers within the next 12 months.

We recognized contract assets of $10.6 million as of March 31, 2024, which related to development milestones deemed probable of receipt for intellectual property licenses granted to partners in prior periods and for goods or services when control has transferred to the customer, and corresponding revenue is recognized on an over time basis but is not yet billable to the customer in accordance with the terms of the contract.

5. Certain Balance Sheet Items

Accounts receivable, net and contract assets consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Accounts receivable from product sales to partners	$	27,045	$	58,588
Accounts receivable from revenues under collaborative agreements	2,078		16,183
Accounts receivable from royalty payments	115,413		118,170
Accounts receivable from other product sales	46,986		47,060

Contract assets	10,589		956
Total accounts receivable and contract assets	202,111		240,957
Allowance for distribution fees and discounts	(6,209)		(6,747)
Total accounts receivable, net and contract assets	$	195,902	$	234,210

Inventories, consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Raw materials	$	29,112	$	23,646
Work-in-process	43,611		34,025
Finished goods	95,818		69,930
Total inventories, net	$	168,541	$	127,601

Prepaid expenses and other assets consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Prepaid manufacturing expenses	$	36,211	$	36,850

Other prepaid expenses	13,847		12,902
Other assets	12,951		16,677
Total prepaid expenses and other assets	63,009		66,429
Less: Long-term portion	(17,319)		(17,816)
Total prepaid expenses and other assets, current	$	45,690	$	48,613

Prepaid manufacturing expenses include raw materials, slot reservation fees and other amounts paid to contract manufacturing organizations. Such amounts are reclassified to work-in-process inventory as materials are used or the contract manufacturing organization services are complete.

Property and equipment, net consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Research equipment	$	8,690	$	8,588
Manufacturing equipment	36,364		32,472
Computer and office equipment	10,888		9,722
Leasehold improvements	7,124		6,987
Subtotal	63,066		57,769
Accumulated depreciation and amortization	(21,180)		(19,661)
Subtotal	41,886		38,108
Right of use of assets	36,185		36,836
Property and equipment, net	$	78,071	$	74,944

Depreciation and amortization expense was approximately $2.4 million and $2.6 million, inclusive of ROU asset amortization of $1.4 million and $1.4 million for the three months ended March 31, 2024 and 2023, respectively.

Accrued expenses consisted of the following (in thousands):


	March 31, 2024		December 31, 2023

Accrued compensation and payroll taxes	$	10,442	$	17,361
Accrued outsourced manufacturing expenses	27,456		12,361
Income taxes payable	19,074		963
Product returns and sales allowance	39,941		41,932
Other accrued expenses	20,839		33,584
Lease liability	31,763		32,197
Total accrued expenses	149,515		138,398
Less long-term portion	(31,201)		(37,720)
Total accrued expenses, current	$	118,314	$	100,678

Expense associated with the accretion of the lease liabilities was approximately $0.6 million and $0.7 million for the three months ended March 31, 2024 and 2023, respectively. Total lease expense for the three months ended March 31, 2024 and 2023 was $2.0 million and $2.1 million, respectively.

Cash paid for amounts related to leases for the three months ended March 31, 2024 and 2023 was $1.8 million and $1.7 million, respectively.

6. Goodwill and Intangible Assets

Goodwill

A summary of the activity impacting goodwill is presented below (in thousands):


Balance as of December 31, 2023	$	416,821
Adjustment	—
Balance as of March 31, 2024	$	416,821

Intangible Assets

Our acquired intangible assets are amortized using the straight-line method over their estimated useful lives of seven to ten years. The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of March 31, 2024 (in thousands).


	Weighted Average Useful Life (in years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Auto Injector technology platform	7	$	402,000	$	106,521	$	295,479
XYOSTED proprietary product	10	136,200		25,263		110,937

Total finite-lived intangibles, net		$	538,200	$	131,784	$	406,416
ATRS-1902 (IPR&D)	Indefinite					48,700
Total intangibles, net						$	455,116

Estimated future annual amortization of finite-lived intangible assets is shown in the following table (in thousands). Actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors.


Year	Amortization Expense
Remainder of 2024	$	53,286
2025	71,049
2026	71,049
2027	71,049
2028	71,049
Thereafter	68,934
Total	$	406,416

7. Long-Term Debt, Net

1.00% Convertible Notes due 2028

In August 2022, we completed the sale of $720.0 million in aggregate principal amount of 1.00% Convertible Senior Notes due 2028 (the “2028 Convertible Notes”). The net proceeds in connection with the issuance of the 2028 Convertible Notes, after deducting the initial purchasers’ fee of $18.0 million, was approximately $702.0 million. We also incurred additional debt issuance costs totaling $1.0 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount.

The 2028 Convertible Notes pay interest semi-annually in arrears on February 15th and August 15th of each year at an annual rate of 1.00%. The 2028 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2028 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness, and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2028 Convertible Notes have a maturity date of August 15, 2028.

Holders may convert their 2028 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on December 31, 2022, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2028 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, February 15, 2028 until the close of business on the second scheduled trading day immediately before the maturity date. As of March 31, 2024, the 2028 Convertible Notes were not convertible.

Upon conversion, we will pay cash for the settlement of principal, and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2028 Convertible Notes is 17.8517 shares of common stock per $1,000 in principal amount of 2028 Convertible Notes, equivalent to a conversion price of approximately $56.02 per share of our common stock. The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued or unpaid interest.

As of March 31, 2024, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition.

Capped Call Transactions

In connection with the offering of the 2028 Convertible Notes, we entered into capped call transactions with certain counterparties (the “Capped Call Transactions”). The Capped Call Transactions are expected generally to reduce potential dilution to holders of our common stock upon conversion of the 2028 Convertible Notes or at our election (subject to certain conditions) offset any cash payments we are required to make in excess of the principal amount of such converted 2028 Convertible Notes. The cap price of the Capped Call Transactions is initially $75.4075 per share of common stock, representing a premium of 75% above the last reported sale price of $43.09 per share of common stock on August 15, 2022, and is subject to certain adjustments under the terms of the Capped Call Transactions. As of March 31, 2024, no capped calls had been exercised.

Pursuant to their terms, the capped calls qualify for classification within stockholders’ equity in our condensed consolidated balance sheets, and their fair value is not remeasured and adjusted as long as they continue to qualify for stockholders’ equity classification. We paid approximately $69.1 million for the Capped Calls, including applicable transaction costs, which was recorded as a reduction to additional paid-in capital in our condensed consolidated balance sheets. The Capped Call Transactions are separate transactions entered into by us with the capped call Counterparties, are not part of the terms of the Convertible Notes, and do not affect any holder’s rights under the Convertible Notes. Holders of the Convertible Notes do not have any rights with respect to the Capped Call Transactions.

0.25% Convertible Notes due 2027

In March 2021, we completed the sale of $805.0 million in aggregate principal amount of 0.25% Convertible Senior Notes due 2027 (the “2027 Convertible Notes”). The net proceeds in connection with the issuance of the 2027 Convertible Notes, after deducting the initial purchasers’ fee of $20.1 million, was approximately $784.9 million. We also incurred additional debt issuance costs totaling $0.4 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount.

The 2027 Convertible Notes pay interest semi-annually in arrears on March 1st and September 1st of each year at an annual rate of 0.25%. The 2027 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2027 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2027 Convertible Notes have a maturity date of March 1, 2027.

Holders may convert their 2027 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2027 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, September 1, 2026 until the close of business on the scheduled trading day immediately before the maturity date. As of March 31, 2024, the 2027 Convertible Notes were not convertible.

Upon conversion, we will pay cash for the settlement of principal and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2027 Convertible Notes is 12.9576 shares of common stock per $1,000 in principal amount of 2027 Convertible Notes, equivalent to a conversion price of approximately $77.17 per share of our common stock. The conversion rate is subject to adjustment.

As of March 31, 2024, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition.

1.25% Convertible Notes due 2024

In November 2019, we completed the sale of $460.0 million in aggregate principal amount of 1.25% Convertible Senior Notes due 2024 (the “2024 Convertible Notes”). The net proceeds in connection with the issuance of the 2024 Convertible Notes, after deducting the initial purchasers’ fee of $12.7 million, was approximately $447.3 million. We also incurred debt issuance cost totaling $0.3 million. Debt issuance costs and the initial purchasers’ fee were presented as a debt discount.

In January 2021, we notified the note holders of our irrevocable election to settle the principal of the 2024 Convertible Notes in cash and for the premium, to deliver shares of common stock. The conversion rate for the 2024 Convertible Notes was 41.9208 shares of common stock per $1,000 in principal amount of 2024 Convertible Notes, equivalent to a conversion price of approximately $23.85 per share of our common stock. The conversion rate was subject to adjustment.

In January 2023, we issued a notice for the redemption of 2024 Convertible Notes. Holders of the notes could convert their notes at any time prior to the close of the business day prior to the redemption date. In March 2023, holders of the notes elected to convert the 2024 Convertible Notes in full. In connection with the conversion, we paid approximately $13.5 million in cash which included principal and accrued interest, and issued 288,886 shares of our common stock representing the intrinsic value based on the contractual conversion rate.

Net Carrying Amounts of our Convertible Notes

The carrying amount and fair value of our Convertible Notes were as follows (in thousands).


	March 31, 2024		December 31, 2023
Principal amount

2027 Convertible Notes	$	805,000	$	805,000
2028 Convertible Notes	720,000		720,000
Total principal amount	$	1,525,000	$	1,525,000

Unamortized debt discount

2027 Convertible Notes	$	(10,094)	$	(10,950)
2028 Convertible Notes	(14,027)		(14,802)
Total unamortized debt discount	$	(24,121)	$	(25,752)

Carrying amount

2027 Convertible Notes	$	794,906	$	794,050
2028 Convertible Notes	705,973		705,198
Total carrying amount	$	1,500,879	$	1,499,248

Fair value based on trading levels (Level 2):

2027 Convertible Notes	$	714,244	$	695,826
2028 Convertible Notes	702,403		670,522
Total fair value of outstanding notes	$	1,416,647	$	1,366,348

Remaining amortization per period of debt discount (in years):

2027 Convertible Notes	2.9		3.2
2028 Convertible Notes	4.4		4.6

The following table summarizes the components of interest expense and the effective interest rates for each of our Convertible Notes (in thousands).


	Three Months Ended March 31,
	2024			2023
Coupon interest
2024 Convertible Notes	$	—		$	36
2027 Convertible Notes	503			503
2028 Convertible Notes	1,800			1,800
Total coupon interest	$	2,303		$	2,339

Amortization of debt discount
2024 Convertible Notes	$	—		$	24
2027 Convertible Notes	856			850
2028 Convertible Notes	775			764
Total amortization of debt discount	$	1,631		$	1,638

Interest expense
2024 Convertible Notes	$	—		$	60
2027 Convertible Notes	1,359			1,353
2028 Convertible Notes	2,575			2,564
Total interest expense	$	3,934		$	3,977

Effective interest rates

2027 Convertible Notes	0.7		%	0.7		%
2028 Convertible Notes	1.5		%	1.5		%

Revolving Credit and Term Loan Facilities (May 2022)

In May 2022, we entered into a credit agreement, which was subsequently amended in August 2022 (the “Amendment”), with Bank of America, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other lenders and L/C Issuers party thereto (the “2022 Credit Agreement), evidencing a credit facility (the “2022 Facility”) that provides for (i) a $575 million revolving credit facility (the “Revolving Credit Facility”) and (ii) a $250 million term loan facility (the “Term Facility”). Concurrently, with the entry into the Amendment, we repaid the entire outstanding Term Loan Facility and repaid all outstanding loans under the Revolving Credit Facility under the 2022 Credit Agreement. The 2022 Facility will mature on November 30, 2026 unless either the Revolving Credit Facility or the Term Facility is extended prior to such date in accordance with the 2022 Credit Agreement.

The Term Facility requires quarterly scheduled repayments of the term loans in each of the first, second, third and fourth years following the closing in annual amounts equal to 2.50%, 5.00%, 7.50% and 10.00% of the initial principal amount of the term loans, respectively. The term loans are also subject to mandatory prepayments from the proceeds of certain asset sales, subject to our right to reinvest the proceeds thereof.

Borrowings under the 2022 Facility bear interest, at our option, at a rate equal to an applicable margin plus: (a) the applicable Term Secured Overnight Financing Rate (“SOFR”) (which includes a SOFR adjustment of 0.10%), or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the Bank of America prime rate, (3) the Term SOFR rate for an interest period of one month plus 1.10%, and (4) 1.00%. The margin for the 2022 Facility ranges, based on our consolidated total net leverage ratio, from 0.25% to 1.25% in the case of base rate loans and from 1.25% to 2.25% in the case of Term SOFR rate loans. In addition to paying interest on the outstanding principal under the Facility, we will pay (i) a commitment fee in respect of the unutilized commitments thereunder and (ii) customary letter of credit fees and agency fees. The commitment fees range from 0.15% to 0.35% per annum based on our consolidated net leverage ratio.

As of March 31, 2024, the Revolving Credit Facility was undrawn. We incurred a total of $3.6 million in third-party costs related to the 2022 Credit Agreement which are recorded as debt issuance cost within prepaid expenses and other assets in our condensed consolidated balance sheets. As of March 31, 2024, the unamortized debt issuance cost related to the revolving credit facility was $2.1 million.

8. Share-based Compensation

The following table summarized share-based compensation expense included in our condensed consolidated statements of income related to share-based awards (in thousands):


	Three Months Ended March 31,
	2024		2023
Research and development	$	3,345	$	3,101
Selling, general and administrative	6,529		4,865
Total share-based compensation expense	$	9,874	$	7,966

Share-based compensation expense by type of share-based award was as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Stock options	$	4,299	$	3,455
RSUs, PSUs and ESPP	5,575		4,511
Total share-based compensation expense	$	9,874	$	7,966

We granted stock options to purchase approximately 0.5 million and 1.2 million shares of common stock during the three months ended March 31, 2024 and 2023, respectively. The exercise price of stock options granted is equal to the closing price of the common stock on the date of grant. The fair value of each option award is estimated on the date of grant using the Black-Scholes-Merton option pricing model (“Black-Scholes Model”). Expected volatility is based on historical volatility of our common stock. The expected term of options granted is based on analyses of historical employee termination rates and option exercises. The risk-free interest rate is based on the U.S. Treasury yield for a period consistent with the expected term of the option in effect at the time of the grant. The dividend yield assumption is based on the expectation of no future dividend payments. The assumptions used in the Black-Scholes Model were as follows:


	Three Months Ended March 31,
	2024	2023
Expected volatility	40.02 - 40.08%	39.68 - 39.98%
Average expected term (in years)	5.0	4.8
Risk-free interest rate	3.80 - 4.28%	3.48 - 4.27%
Expected dividend yield	—	—

In February 2021, our Board of Directors approved our 2021 ESPP and our stockholders approved the plan in May 2021. The ESPP enables eligible employees to purchase shares of our common stock at the end of each offering period at a price equal to 85% of the fair market value of the shares on the first business day or the last business day of the offering period, whichever is lower. Share purchases are funded through payroll deduction of at least 1% and up to 15% of an employee’s compensation for each payroll period, and no employee may purchase shares under the ESPP that exceeds $25,000 worth of our common stock for a calendar year. As of March 31, 2024, 2,604,222 shares were available for future purchase. The offering period is generally for a six-month period and the first offering period commenced on June 16, 2021. Offering periods shall commence on or about the sixteenth day of June and December of each year and end on or about the fifteenth day of the next December and June, respectively, occurring thereafter.

Total unrecognized estimated compensation cost by type of award and the weighted-average remaining requisite service period over which such expense is expected to be recognized was as follows (in thousands, unless otherwise noted):


	March 31, 2024
	Unrecognized Expense		Remaining Weighted-Average Recognition Period (in years)
Stock options	$	42,038	2.70

RSUs	56,513		3.05
PSUs	11,543		2.30
ESPP	118		0.21

9. Stockholders’ Equity

During the three months ended March 31, 2024 and 2023, we issued an aggregate of 154,556 and 143,931 shares of common stock, respectively, in connection with the exercises of stock options at a weighted average exercise price of $17.47 and $16.87 per share, respectively, for net proceeds of approximately $2.7 million and $2.4 million, respectively. For the three months ended March 31, 2024 and 2023, we issued 262,195 and 239,919 shares of common stock, respectively, upon vesting of certain RSUs and PSUs for which the RSU and PSU holders surrendered 88,825 and 70,733 RSUs and PSUs, respectively, to pay for minimum withholding taxes totaling approximately $6.0 million and $6.5 million, respectively. Stock options and unvested restricted units totaling approximately 8.7 million and 7.8 million shares of our common stock were outstanding as of March 31, 2024 and December 31, 2023, respectively.

Share Repurchases

In December 2021, the Board of Directors authorized a second capital return program to repurchase up to $750.0 million of outstanding stock over a three-year period. During 2021, we repurchased 3.9 million shares of common stock for $150.0 million at an average price of $38.51. During 2022, we repurchased 4.5 million shares of common stock for $200.0 million at an average price of $44.44.

We accelerated the initiation of our planned 2024 share repurchases and in November 2023, we entered into an Accelerated Share Repurchase (“ASR”) agreement with Bank of America, N.A. to accelerate the remaining $250.0 million of share repurchases under the approved capital return program. Pursuant to the agreement, at the inception of the ASR, we paid $250.0 million to Bank of America, N.A. and took initial delivery of 5.5 million shares. All shares repurchased under our capital return programs have been retired and have resumed their status of authorized and unissued shares. We continued to execute share repurchases during the three months ended March 31, 2024 under our ASR agreement with Bank of America, N.A.

As of March 31, 2024, excluding the shares we received under the ASR, we have repurchased a total of 12.6 million shares for $500.0 million at an average price per share of $39.81 under our $750 million 3-year share repurchase plan.

In February 2024, our Board of Directors authorized a new capital return program to repurchase up to $750.0 million of our outstanding common stock.

10. Earnings per share

Basic earnings per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period, without consideration for common stock equivalents. Outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and the Convertible Notes are considered common stock equivalents and are only included in the calculation of diluted earnings per common share when net income is reported and their effect is dilutive.

Potentially dilutive common shares issuable upon vesting of stock options, RSUs and PSUs are determined using the average share price for each period under the treasury stock method. Potentially dilutive common shares issuable upon conversion of the Convertible Notes are determined using the if-converted method. Since we have committed to settle the principal amount of the Convertible Notes in cash upon conversion only, the number of shares for the conversion spread will be included as a dilutive common stock equivalent.

A reconciliation of the numerators and the denominators of the basic and diluted earnings per share computations is as follows (in thousands, except per share amounts):


	Three Months Ended March 31,
	2024		2023
Numerator
Net income	$	76,823	$	39,615
Denominator
Weighted average common shares outstanding for basic earnings per share	126,941		135,027
Dilutive potential common stock outstanding
Stock options	1,607		2,173
RSUs, PSUs and ESPP	339		468
Convertible Notes	—		232
Weighted average common shares outstanding for diluted earnings per share	128,887		137,900
Earnings per share
Basic	$	0.61	$	0.29
Diluted	$	0.60	$	0.29

Shares which have been excluded from the calculation of diluted earnings per common share because their effect was anti-dilutive include the following (shares in millions):


	Three Months Ended March 31,
	2024	2023
Anti-dilutive securities (1)	28.2	26.2

(1) The anti-dilutive securities include outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and Convertible Notes.

11. Commitments and Contingencies

From time to time, we may be involved in disputes, including litigation, relating to claims arising out of operations in the normal course of our business. Any of these claims could subject us to costly legal expenses and, while we generally believe that we have adequate insurance to cover many different types of liabilities, our insurance carriers may deny coverage or our policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of any such awards could have a material adverse effect on our condensed consolidated statements of income and balance sheets. Additionally, any such claims, whether or not successful, could damage our reputation and business. We currently are not a party to any legal proceedings, the adverse outcome of which, in our opinion, individually or in the aggregate, would have a material adverse effect on our condensed consolidated statements of income or balance sheets.

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

As used in this Quarterly Report on Form 10-Q, unless the context suggests otherwise, references to “Halozyme,” “the Company,” “we,” “our,” “ours,” and “us” refer to Halozyme Therapeutics, Inc., its wholly owned subsidiaries, Halozyme, Inc., Antares Pharma Inc., and Antares Pharma Inc.’s wholly owned subsidiaries, Antares Pharma IPL AG and Antares Pharma AG. References to “Notes” refer to the notes to the condensed consolidated financial statements included herein (refer to Item 1 of Part I).

The following information should be read in conjunction with the condensed consolidated financial statements and notes thereto included in Item 1 of this Quarterly Report on Form 10-Q, as well as the audited financial statements and notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations for the year ended December 31, 2023, included in our Annual Report on Form 10-K for the year ended December 31, 2023. Past financial or operating performance is not necessarily a reliable indicator of future performance, and our historical performance should not be used to anticipate results or future period trends.

This Quarterly Report on Form 10-Q contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, provisions of Section 21E of the securities and Exchange Act, as amended, and Section 27A of the Securities Act of 1933, as amended.. All statements in this report other than statements of historical fact, included herein, including without limitation those regarding our future product development and regulatory events and goals, product collaborations, our business intentions and financial statements and anticipated results, are, or may be deemed to be, forward-looking statements. Words such as “expect,” “anticipate,” “intend,” “plan,” “believe,” “seek,” “estimate,” “think,” “may,” “could,” “will,” “would,” “should,” “continue,” “potential,” “likely,” “opportunity,” “project” and similar expressions or variations of such words are intended to identify forward-looking statements, but are not the exclusive means of identifying forward-looking statements in this Quarterly Report on Form 10-Q. Additionally, statements concerning future matters such as the development or regulatory approval of new partner products, enhancements of existing products or technologies, timing and success of the launch of new products by us and our partners, third-party performance under key collaboration agreements, the ability of our bulk drug and device part manufacturers to provide adequate supply for our partners, revenue, expense, cash burn levels and our ability to make timely repayments of debt, anticipated amounts and timing of share repurchases, anticipated profitability and expected trends and other statements regarding our plans and matters that are not historical are forward-looking statements. Such statements reflect management’s current forecast of certain aspects of our future business, are based on currently available operating, financial and competitive information and are subject to various risks, uncertainties and assumptions that could cause actual results to differ materially from those anticipated or implied in our forward-looking statements due to a number of factors including, but not limited to, those set forth below under the section entitled “Risks Factors” and elsewhere in this Quarterly Report on Form 10-Q and our most recent Annual Report on Form 10-K. Readers are urged not to place undue reliance on these forward-looking statements, which speak only as of the date of this Quarterly Report on Form 10-Q. We undertake no obligation to revise or update any forward-looking statements in order to reflect any event or circumstance that may arise after the date of this Quarterly Report on Form 10-Q.

Overview

Halozyme Therapeutics, Inc. is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies.

As the innovators of ENHANZE® drug delivery technology (“ENHANZE”) with our proprietary enzyme rHuPH20, our commercially validated solution is used to facilitate the subcutaneous (“SC”) delivery of injected drugs and fluids, with the goal of reducing the treatment burden for patients. We license our technology to biopharmaceutical companies to collaboratively develop products that combine ENHANZE with our partners’ proprietary compounds. We also develop, manufacture and commercialize, for ourselves or with our partners, drug-device combination products using our advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence.

Our ENHANZE partners’ approved products and product candidates are based on rHuPH20, our patented recombinant human hyaluronidase enzyme. rHuPH20 works by breaking down hyaluronan (“HA”), a naturally occurring carbohydrate that is a major component of the extracellular matrix of the SC space. This temporarily reduces the barrier to bulk fluid flow allowing for improved and more rapid SC delivery of high dose, high volume injectable biologics, such as monoclonal antibodies and other large therapeutic molecules, as well as small molecules and fluids. We refer to the application of rHuPH20 to facilitate the delivery of other drugs or fluids as ENHANZE. We license our ENHANZE technology to form collaborations with biopharmaceutical companies that develop or market drugs requiring or benefiting from injection via the SC route of administration. In the development of proprietary intravenous (“IV”) drugs combined with our ENHANZE technology, data have been generated supporting the potential for ENHANZE to reduce patient treatment burden, as a result of shorter duration of SC administration with ENHANZE compared to IV administration. ENHANZE may enable fixed-dose SC dosing compared to weight-based dosing typically required for IV administration, extend the dosing interval for drugs that are already administered subcutaneously and potentially allow for lower rates of infusion-related reactions. ENHANZE may enable more flexible treatment options such as home administration by a healthcare professional or potentially the patient or caregiver. Lastly, certain proprietary drugs co-formulated with ENHANZE have been granted additional exclusivity, extending the patent life of the product beyond the patent expiry of the proprietary IV drug.

We currently have ENHANZE collaborations and licensing agreements with F. Hoffmann-La Roche, Ltd. and Hoffmann-La Roche, Inc. (“Roche”), Takeda Pharmaceuticals International AG and Baxalta US Inc. (“Takeda”), Pfizer Inc. (“Pfizer”), Janssen Biotech, Inc. (“Janssen”), AbbVie, Inc. (“AbbVie”), Eli Lilly and Company (“Lilly”), Bristol Myers Squibb Company (“BMS”), argenx BVBA (“argenx”), ViiV Healthcare (the global specialist HIV Company majority owned by GlaxoSmithKline) (“ViiV”), Chugai Pharmaceutical Co., Ltd. (“Chugai”) and Acumen Pharmaceuticals, Inc. (“Acumen”). In addition to receiving upfront licensing fees from our ENHANZE collaborations, we are entitled to receive event and sales-based milestone payments, revenues from the sale of bulk rHuPH20 and royalties from commercial sales of approved partner products co-formulated with ENHANZE. We currently earn royalties from the sales of seven commercial products including sales of one commercial product from each of the Takeda, Janssen and argenx collaborations and four commercial products from the Roche collaboration.

Our commercial portfolio of proprietary products includes Hylenex®, utilizing rHuPH20, and our specialty product XYOSTED®, utilizing our auto-injector technology.

Our first quarter of 2024 and recent key events are as follows:

Partners

•In May 2024, BMS announced that the U.S. Food and Drug Administration (“FDA”) accepted its Biologics License Application (“BLA”) for the subcutaneous formulation of Opdivo (nivolumab) co-formulated with ENHANZE, resulting in a $15.0 million milestone payment. The FDA assigned a Prescription Drug User Fee Act (“PDUFA”) goal date of February 28, 2025.

•In April 2024, Roche announced that European Medicines Agency’s Committee for Medicinal Products for Human Use has recommended the approval of Ocrevus (ocrelizumab) SC for its multiple sclerosis (“MS”) indications. A final decision on its approval from the European Commission (“EC”) is expected mid-2024.

•In April 2024, Roche announced that the FDA has accepted the submission of orcelizumab SC with potential approval in September 2024.

•In April 2024, Roche’s Mabthera SC was approved by the China National Medical Products Administration (“NMPA”) to treat diffuse large B-cell lymphoma (“DLBCL”).

•In March 2024, ViiV initiated a Phase 1 study of VH4524184 with ENHANZE to evaluate the safety, tolerability, and pharmacokinetics in healthy adults.

•In the first quarter of 2024, argenx initiated two registrational studies evaluating efgartigimod with ENHANZE administered by pre-filled syringe in subjects with thyroid eye disease (“TED”).

•In February 2024, argenx announced that the FDA had accepted for priority review a supplemental Biologics License Application (“sBLA”) for VYVGART Hytrulo (efgartigimod alfa and hyaluronidase-qvfc) for the treatment of chronic inflammatory demyelinating polyneuropathy (“CIDP”). The application has been granted a PDUFA action date of June 21, 2024.

•In February 2024, Takeda submitted a New Drug Application (“NDA”) in Japan seeking approval for TAK-771, subcutaneous 10% human immunoglobulin with ENHANZE, for treatment of primary immunodeficiency.

•In January 2024, Janssen announced submission of a sBLA to the FDA seeking approval of a new indication for DARZALEX FASPRO in combination with bortezomib, lenalidomide and dexamethasone (“D-VRd”) for induction and consolidation treatment and with lenalidomide (“D-R”) for maintenance treatment of adult patients who are newly diagnosed with multiple myeloma (“NDMM”) and are eligible for autologous stem cell transplant (“ASCT”).

•In January 2024, Roche received EC marketing authorization for Tecentriq SC for all approved indications of Tecentriq IV for multiple cancer types.

•In January 2024, Takeda received FDA and EC approval for HYQVIA for the treatment of CIDP.

•In January 2024, argenx received regulatory approval in Japan for VYVDURA (efgartigimod alfa and hyaluronidase-qvfc) co-formulated with ENHANZE for the treatment of adult patients with generalized myasthenia gravis (“gMG”) including options for self-administration, and in April 2024, VYVDURA was made available to patients resulting in $14.0 million in total milestone payments.

Corporate

•In February 2024, our Board of Directors authorized our third capital return program to repurchase up to $750.0 million of our outstanding common stock.

Product and Product Candidates

The following table summarizes our marketed proprietary products and product candidates under development and our marketed partnered products and product candidates under development with our partners:

Proprietary Products and Product Candidates

Hylenex Recombinant (hyaluronidase human injection)

We market and sell Hylenex recombinant which is a formulation of rHuPH20 that facilitates SC administration for achieving hydration, increases the dispersion and absorption of other injected drugs and, in SC urography, to improve resorption of radiopaque agents. Hylenex recombinant is currently the number one prescribed branded hyaluronidase.

XYOSTED (testosterone enanthate) Injection

We market and sell our proprietary product XYOSTED for SC administration of testosterone replacement therapy (“TRT”) in adult males for conditions associated with a deficiency or absence of endogenous testosterone (primary or hypogonadism). XYOSTED is the only FDA-approved SC testosterone enanthate product for once-weekly, at-home self-administration and is approved and marketed in the United States (“U.S.”) in three dosage strengths, 50 mg, 75 mg and 100 mg.

ATRS - 1902

We have an ongoing program to develop a proprietary drug device combination product for the endocrinology market, for patients who require additional supplemental hydrocortisone, identified as ATRS-1902. The development program uses a novel proprietary auto-injector platform to deliver a liquid stable formulation of hydrocortisone.

In June 2021, we submitted an investigational new drug (“IND”) application with the FDA for the initiation of a Phase 1 clinical study of ATRS-1902 for adrenal crisis rescue. The IND application included the protocol for an initial clinical study to compare the pharmacokinetics (“PK”) profile of our novel formulation of hydrocortisone versus Solu-Cortef®, which is an anti-inflammatory glucocorticoid and is the current standard of care for the management of acute adrenal crises.

In July 2021, the FDA accepted our IND for ATRS-1902 enabling us to initiate our Phase 1 clinical study. The Phase 1 clinical study, designed to evaluate the safety, tolerability and PK of a liquid stable formulation of hydrocortisone, was initiated in September 2021. The study was a cross-over design to establish the PK profile of ATRS-1902 (100 mg) compared to Solu-Cortef (100 mg), the reference-listed drug, in 32 healthy adults.

In January 2022, we announced the positive results from the Phase 1 clinical study and were granted Fast Track designation by the FDA. The positive results supported the advancement of our ATRS-1902 development program to a pivotal study for the treatment of acute adrenal insufficiency, using our Vai novel proprietary rescue pen platform to deliver a liquid stable formulation of hydrocortisone.

Partnered Products

ENHANZE Collaborations

Roche Collaboration

In December 2006, we and Roche entered into a collaboration and license agreement under which Roche obtained a worldwide license to develop and commercialize product combinations of rHuPH20 and up to twelve Roche target compounds (the “Roche Collaboration”). Under this agreement, Roche elected a total of eight targets, two of which are exclusive.

In September 2013, Roche launched a SC formulation of Herceptin (trastuzumab) (Herceptin® SC) in Europe for the treatment of patients with HER2-positive breast cancer followed by launches in additional countries. This formulation utilizes our ENHANZE technology and is administered in two to five minutes, compared to 30 to 90 minutes with the standard IV form. Herceptin SC has since received approval in Canada, the U.S. (under the brand name Herceptin Hylecta™) and China.

In June 2020, the FDA approved the fixed-dose combination of Perjeta® (pertuzumab) and Herceptin for SC injection (Phesgo®) utilizing ENHANZE technology for the treatment of patients with HER2-positive breast cancer. Phesgo has since received approval in Europe and China. In September 2023, Chugai (a Member of the Roche Group) announced that it had obtained regulatory approval for Phesgo from the Ministry of Health, Labour and Welfare (“MHLW”) in Japan. We will receive royalties for Phesgo sales in Japan as part of our licensing agreement with Roche.

In June 2014, Roche launched MabThera® SC in Europe for the treatment of patients with common forms of non-Hodgkin lymphoma (“NHL”), followed by launches in additional countries. This formulation utilizes our ENHANZE technology and is administered in approximately five minutes compared to the approximate 1.5 to 4 hour IV infusion. In May 2016, Roche announced that the European Medicines Agency (“EMA”) approved MabThera SC to treat patients with chronic lymphocytic leukemia (“CLL”). In June 2017, the FDA-approved Genentech’s RITUXAN HYCELA®, a combination of rituximab using ENHANZE technology (approved and marketed under the MabThera SC brand in countries outside the U.S. and Canada), for CLL and two types of NHL, follicular lymphoma and diffuse large B-cell lymphoma. In March 2018, Health Canada approved a combination of rituximab and ENHANZE (approved and marketed under the brand name RITUXAN® SC) for patients with CLL. In April 2024, Roche’s Mabthera SC was approved by the China NMPA to treat DLBCL.

In September 2017 and October 2018, we entered into agreements with Roche to develop and commercialize additional exclusive targets using ENHANZE technology. The upfront license payment may be followed by event-based payments subject to Roche’s achievement of specified development, regulatory and sales-based milestones. In addition, Roche will pay royalties to us if products under the collaboration are commercialized.

In December 2018, Roche initiated a Phase 1b/2 study in patients with non-small cell lung cancer (“NSCLC”) for TECENTRIQ® (atezolizumab) using ENHANZE technology, followed by initiation of a Phase 3 study in December 2020. In August 2022, Roche announced that the Phase 3 study met its co-primary endpoints showing non-inferior levels of Tecentriq in the blood PK, when injected subcutaneously, compared with IV infusion, in cancer immunotherapy-naïve patients with advanced or metastatic NSCLC for whom prior platinum therapy has failed. The safety profile of the SC formulation was consistent with that of IV Tecentriq. In August 2023, Roche announced the approval of Tecentriq SC with ENHANZE by the Medicines and Healthcare products Regulatory Agency (“MHRA”) in Great Britain. In January 2024, Roche received EC marketing authorization for Tecentriq SC for all approved indications of Tecentriq IV. Roche is expecting Tecentriq SC approval in the U.S. in September 2024 and is planning to launch soon after. Tecentriq SC enables SC delivery in approximately seven minutes, compared with 30-60 minutes for IV infusion.

In August 2019, Roche initiated a Phase 1 study evaluating ocrelizumab SC with ENHANZE technology in subjects with MS, followed by initiation of a Phase 3 study in April 2022. In July 2023, Roche announced that the Phase 3 OCARINA 2 trial evaluating ocrelizumab SC with ENHANZE as a twice a year 10-minute SC injection met its primary and secondary endpoints in patients with relapsing forms of MS or primary progressive MS (“RMS” or “PPMS”). In April 2024, Roche announced the EMA and FDA have both accepted the submissions for ocrelizumab SC with ENHANZE, with approval anticipated mid-2024 in the EMA and in September 2024 for the FDA.

In October 2019, Roche nominated a new undisclosed exclusive target to be studied using ENHANZE technology. In November 2021, Roche initiated a Phase 1 study with the undisclosed target and ENHANZE.

Takeda Collaboration

In September 2007, we and Takeda entered into a collaboration and license agreement under which Takeda obtained a worldwide, exclusive license to develop and commercialize product combinations of rHuPH20 with GAMMAGARD LIQUID (HYQVIA®) (the “Takeda Collaboration”). HYQVIA is indicated for the treatment of primary immunodeficiency disorders associated with defects in the immune system.

In May 2013, the EC granted Takeda marketing authorization in all EU Member States for the use of HYQVIA as replacement therapy for adult patients with primary and secondary immunodeficiencies. Takeda launched HYQVIA in the first EU country in July 2013 and has continued to launch in additional countries. In May 2016, Takeda announced that HYQVIA received a marketing authorization from the EC for a pediatric indication.

In September 2014, HYQVIA was approved by the FDA for treatment of adult patients with primary immunodeficiency in the U.S. HYQVIA is the first SC immune globulin (“IG”) treatment approved for adult primary immunodeficiency patients with a dosing regimen requiring only one infusion up to once per month (every three to four weeks) and one injection site per infusion in most patients, to deliver a full therapeutic dose of IG.

In September 2020, Takeda announced the EMA approved a label update for HYQVIA broadening its use and making it the first and only facilitated SC immunoglobulin replacement therapy in adults, adolescents and children with an expanded range of secondary immunodeficiencies (“SID”).

In October 2021, Takeda initiated a Phase 1 single-dose, single-center, open-label, three-arm study to assess the tolerability and safety of immune globulin SC (human), 20% solution with ENHANZE (TAK-881) at various infusion rates in healthy adult subjects. In October 2023, Takeda initiated a Phase 2/3 study to evaluate PK, safety, and tolerability of subcutaneous administration of TAK-881 in adult and pediatric participants with Primary Immunodeficiency Diseases (“PIDD”).

In July 2022, Takeda announced positive topline results from a pivotal Phase 3 trial evaluating HYQVIA, for maintenance treatment of CIDP. In June 2023, Takeda announced positive full results from a pivotal Phase 3 trial evaluating HYQVIA for maintenance treatment of CIDP and confirmed regulatory applications were under review in the U.S. and EU for HYQVIA use as a maintenance therapy in adults with stable CIDP. In January 2024, Takeda received FDA and EC approval for HYQVIA for the treatment of CIDP.

In April 2023, Takeda announced that the FDA-approved the sBLA to expand the use of HYQVIA to treat primary immunodeficiency in children. In February 2024, Takeda submitted a NDA in Japan seeking approval for TAK-771, subcutaneous 10% human immunoglobulin with ENHANZE, for treatment of primary immunodeficiency.

Pfizer Collaboration

In December 2012, we and Pfizer entered into a collaboration and license agreement, under which Pfizer has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Pfizer proprietary biologics in primary care and specialty care indications. Pfizer has elected five targets and has returned two targets.

Janssen Collaboration

In December 2014, we and Janssen entered into a collaboration and license agreement, under which Janssen has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Janssen proprietary biologics directed to up to five targets. Targets may be selected on an exclusive basis. Janssen elected CD38 and initiated several Phase 3 studies, Phase 2 studies and Phase 1 studies of DARZALEX® (daratumumab), directed at CD38, using ENHANZE technology in patients with amyloidosis, smoldering myeloma and multiple myeloma.

In May 2020, Janssen launched the commercial sale of DARZALEX FASPRO® (DARZALEX utilizing ENHANZE technology) in four regimens across five indications in multiple myeloma patients, including newly diagnosed, transplant-ineligible patients as well as relapsed or refractory patients. As a fixed-dose formulation, DARZALEX FASPRO can be administered over three to five minutes, significantly less time than DARZALEX IV which requires multi-hour infusions. In June 2020, we announced that Janssen received European marketing authorization and launched the commercial sale of DARZALEX SC utilizing ENHANZE in the EU. Subsequent to these approvals, Janssen received several additional regulatory approvals for additional indications and patient populations in the U.S., EU, Japan and China. Beginning with the U.S., Janssen has marketing authorization for DARZALEX FASPRO in combination with bortezomib, thalidomide, and dexamethasone in newly diagnosed multiple myeloma patients who are eligible for autologous stem cell transplant, in combination with bortezomib, cyclophosphamide and dexamethasone (“D-VCd”) for the treatment of adult patients with newly diagnosed AL amyloidosis, in combination with pomalidomide and dexamethasone (“D-Pd”) for patients with multiple myeloma after first or subsequent relapse, and in combination with Kyprolis® (carfilzomib) and dexamethasone for patients with relapsed or refractory multiple myeloma who have received one to three prior lines of therapy. In the EU, Janssen has marketing authorization for DARZALEX SC in combination with D-VCd in newly diagnosed adult patients with AL amyloidosis and in combination with D-Pd in adult patients with relapsed or refractory multiple myeloma. In Japan, Janssen has marketing authorization for the SC formulation of DARZALEX (known as DARZQURO in Japan) for the treatment of multiple myeloma and systemic AL amyloidosis. In China, Janssen has marketing authorization for DARZALEX SC for the treatment of primary light chain amyloidosis, in combination with D-VCd in newly diagnosed patients. In January 2024, Janssen announced submission of a sBLA to the FDA seeking approval of a new indication for DARZALEX FASPRO in combination with D-VRd for induction and consolidation treatment and with D-R for maintenance treatment of adult patients who are NDMM and are eligible for ASCT.

In December 2019, Janssen elected epidermal growth factor receptor (“EGFR”) and mesenchymal-epithelial transition factor (“cMET”) as a bispecific antibody (amivantamab) target on an exclusive basis, which is being studied in solid tumors. In September 2022, following a Phase 1 study, Janssen initiated a Phase 3 study of lazertinib and amivantamab with ENHANZE in patients with EGFR-mutated advanced or metastatic non-small cell lung cancer (PALOMA-3). In November 2022, Janssen initiated a Phase 2 study of amivantamab with ENHANZE in multiple regimens in patients with advanced or metastatic solid tumors including EGFR-mutated non-small cell lung cancer (PALOMA-2). In January 2024, Janssen noted its intention to submit applications in the U.S. and EU seeking approval of a SC formulation for amivantamab SC during 2024.

In July 2021, Janssen elected the target human immunodeficiency virus (“HIV”) reverse transcriptase limited to non-nucleoside reverse transcriptase inhibitors. In December 2021, Janssen initiated a Phase 1 clinical trial combining rilpivirine and ENHANZE. In 2023, Janssen discontinued the rilpivirine program with ENHANZE.

AbbVie Collaboration

In June 2015, we and AbbVie entered into a collaboration and license agreement, under which AbbVie has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with AbbVie proprietary biologics directed to up to nine targets. Targets may be selected on an exclusive basis.

Lilly Collaboration

In December 2015, we and Lilly entered into a collaboration and license agreement, under which Lilly has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Lilly proprietary biologics. Lilly currently has the right to select up to three targets. Targets may be selected on an exclusive basis. Lilly has elected two targets on an exclusive basis and one target on a semi-exclusive basis.

BMS Collaboration

In September 2017, we and BMS entered into a collaboration and license agreement, which became effective in November 2017, under which BMS had the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with BMS products directed at up to eleven targets. Targets may be selected on an exclusive basis or non-exclusive basis. BMS has designated multiple immuno-oncology targets including programmed death 1 (“PD-1”) and has an option to select three additional targets by November 2024. In October 2019, BMS initiated a Phase 1 study of relatlimab, an anti-LAG-3 antibody, in combination with nivolumab using ENHANZE technology. In May 2021, BMS initiated a Phase 3 of nivolumab using ENHANZE technology for patients with advanced or metastatic clear cell renal cell carcinoma (CheckMate-67T), leveraging data and insights from Phase 1/2 CA209-8KX study in patients with solid tumors. In October 2023, BMS reported positive top-line data from the Phase 3 CheckMate-67T trial evaluating a SC formulation of Opdivo (nivolumab) with ENHANZE in patients with advanced or metastatic clear cell renal cell carcinoma (“ccRCC”) who have received prior systemic therapy. The study met its co-primary PK endpoints and a key secondary endpoint. In May 2024, BMS announced that the FDA accepted its BLA for the subcutaneous formulation of Opdivo (nivolumab) co-formulated with ENHANZE and assigned a PDUFA goal date of February 28, 2025.

In March 2023, BMS initiated a Phase 3 trial to demonstrate the drug exposure levels of nivolumab and relatlimab fixed-dose combination with ENHANZE is not inferior to IV administration in participants with previously untreated metastatic or unresectable melanoma (RELATIVITY-127).

argenx Collaboration

In February 2019, we and argenx entered into an agreement for the right to develop and commercialize one exclusive target, the human neonatal Fc receptor FcRn, which includes argenx’s lead asset efgartigimod (ARGX-113), and an option to select two additional targets using ENHANZE technology. In May 2019, argenx nominated a second target to be studied using ENHANZE technology, a human complement factor C2 associated with the product candidate ARGX-117, which is being developed to treat severe autoimmune diseases in Multifocal Motor Neuropathy (“MMN”). In October 2020, we and argenx entered into an agreement to expand the collaboration relationship, adding three targets for a total of up to six targets under the collaboration.

In December 2021, argenx announced the FDA approval of efgartigimod (VYVGARTTM) for the treatment of gMG for the IV dosing regimen. In March 2022, argenx announced that data from argenx’s phase 3 ADAPT-SC study evaluating SC efgartigimod utilizing ENHANZE (1000mg efgartigimod-PH20) for the treatment of gMG achieved the primary endpoint of total IgG reduction from baseline at day 29, demonstrating statistical non-inferiority to VYVGART (efgartigimod alfa-fcab) IV formulation in gMG patients.

In June 2023, argenx received FDA approval under the brand name VYVGART® Hytrulo for the injection with ENHANZE for SC use of treatment of gMG in adult patients who are anti-acetylcholine receptor (“AChR”) antibody positive. In November 2023, argenx received EC approval of VYVGART SC for the treatment of gMG, which also provides the option for patient self-administration. In January 2024, argenx received Japan approval for VYVDURA® (efgartigimod alfa and hyaluronidase-qvfc) co-formulated with ENHANZE for the treatment of adult patients with gMG including options for self-administration. argenx also expects the regulatory decision on approval of VYVGART SC for gMG in China through Zai Lab by the end of 2024.

In July 2023, argenx reported positive data from the ADHERE study evaluating VYVGART® Hytrulo with ENHANZE in adults with CIDP. In February 2024, argenx announced that the FDA had accepted for priority review a sBLA for VYVGART Hytrulo for the treatment of CIDP. The application has been granted a PDUFA action date of June 21, 2024. argenx also expects to submit VYVGART SC for CIDP for regulatory approval in Japan, Europe, China and Canada in 2024. In September 2023, Zai Lab limited (argenx commercial partner for China) announced the CDE of the National Medical Products Administration (“NMPA”) granted Breakthrough Therapy Designation for efgartigimod SC for the treatment of patients with CIDP.

argenx is currently conducting the following studies with the goal of expanding approved indications for efgartigimod with ENHANZE: Phase 2/3 (ALKIVIA) study in active idiopathic inflammatory myopathy (Myositis) and two registrational studies in TED. Evaluation is ongoing to determine the path forward in BALLAD study evaluating efgartigimod in bullous pemphigoid (BP) with an update expected in 2024.

ViiV Healthcare Collaboration

In June 2021, we and ViiV entered into a global collaboration and license agreement that gives ViiV exclusive access to our ENHANZE technology for four specific small and large molecule targets for the treatment and prevention of HIV. These targets are integrase inhibitors, reverse transcriptase inhibitors limited to nucleoside reverse transcriptase inhibitors (“NRTI”) and nucleoside reverse transcriptase translocation inhibitors (“NRTTIs”), capsid inhibitors and broadly neutralising monoclonal antibodies (“bNAbs”), that bind to the gp120 CD4 binding site. In December 2021, ViiV initiated enrollment of a Phase 1 study to evaluate cabotegravir administered subcutaneously with ENHANZE. In March 2024, ViiV presented the results of the Phase 1 study of cabotegravir and communicated their decision to no longer pursue cabotegravir 200mg/ml SC plus rHuPH20 for long term dosing. In February 2022, ViiV initiated enrollment of a Phase 1 study to evaluate the safety and PKs of N6LS, a broadly neutralizing antibody, administered subcutaneously with ENHANZE technology. In June 2022, ViiV initiated enrollment of a Phase 1 single dose escalation study to evaluate PKs, safety and tolerability of long-acting cabotegravir administered subcutaneously with ENHANZE technology. In August 2023, ViiV initiated a Phase 2b study to evaluate the efficacy, safety, PKs and tolerability of VH3810109 (N6LS) administered subcutaneously with rHuPH20 in combination with cabotegravir. In the third quarter of 2023, ViiV initiated a Phase 1 study with ENHANZE for an undisclosed program. In March 2024, ViiV initiated a Phase 1 study of VH4524184 with ENHANZE to evaluate the safety, tolerability, and pharmacokinetics in healthy adults.

Chugai Collaboration

In March 2022, we and Chugai entered into a global collaboration and license agreement that gives Chugai exclusive access to ENHANZE technology for an undisclosed target. Chugai intends to explore the potential use of ENHANZE for a Chugai drug candidate. In May 2022, Chugai initiated a Phase 1 study to evaluate the PKs, pharmacodynamics, and safety of targeted antibody administered subcutaneously with ENHANZE.

Acumen Collaboration

In November 2023, we and Acumen entered into a global collaboration and non-exclusive license agreement that provides Acumen access to ENHANZE for a single target. Acumen intends to explore the potential use of ENHANZE for ACU193, Acumen’s clinical stage monoclonal antibody candidate to target Amyloid-β Oligomers for the treatment of early Alzheimer’s disease. In March 2024, Acumen announced plans to initiate a Phase 2 IV study for ACU193 in the first half of 2024 and a Phase 1 SC study for ACU193 in mid-2024.

Device and Other Drug Product Collaborations

Teva License, Development and Supply Agreements

In July 2006, we entered into an exclusive license, development and supply agreement with Teva for an epinephrine auto- injector product to be marketed in the U.S. and Canada. We are the exclusive supplier of the device, which we developed, for Teva’s generic Epinephrine Injection USP products, indicated for emergency treatment of severe allergic reactions including those that are life threatening (anaphylaxis) in adults and certain pediatric patients. Teva’s Epinephrine Injection, utilizing our patented VIBEX® injection technology, was approved by the FDA as a generic drug product with an AB rating, meaning that it is therapeutically equivalent to the branded products EpiPen® and EpiPen Jr® and therefore, subject to state law, substitutable at the pharmacy.

In December 2007, we entered into a license, development and supply agreement with Teva under which we developed and supply a disposable pen injector for teriparatide. Under the agreement, we received an upfront payment and development milestones, and are entitled to receive royalties on net product sales by Teva in territories where commercialized. We are the exclusive supplier of the multi-dose pen, which we developed, used in Teva’s generic teriparatide injection product. In 2020, Teva launched Teriparatide Injection, the generic version of Eli Lilly’s branded product Forsteo® featuring our multi-dose pen platform, for commercial sale in several countries outside of the U.S. In November 2023, Teva announced FDA approval of the generic version of Forteo, featuring our multi-dose auto-injector pen platform for the treatment of osteoporosis among certain women and men.

Pfizer Agreement

In August 2018, we entered into a development agreement with Pfizer to jointly develop a combination drug device rescue pen utilizing the QuickShot auto-injector and an undisclosed Pfizer drug. Pfizer has provided the intellectual property rights for further development of the product to us and has retained an option to assist in the marketing, distribution and sale if we complete development of the product and submit for regulatory approval. We are continuing to evaluate the next steps for this program.

Idorsia Agreement

In November 2019, we entered into a global agreement with Idorsia to develop a novel, drug-device product containing selatogrel. A new chemical entity, selatogrel is being developed for the treatment of a suspected acute myocardial infarction (“AMI”) in adult patients with a history of AMI.

In March 2024, the recruitment of the Phase 3 study with selatogrel for acute myocardial infarction had reached approximately 6,000 patients.

Otter Agreement

In December 2021, we entered into a supply agreement with Otter to manufacture the VIBEX auto-injection system device, designed and developed to incorporate a pre-filled syringe for delivery of methotrexate, assemble, package, label and supply the final OTREXUP product and related samples to Otter at cost plus mark-up. Otter is responsible for manufacturing, formulation and testing of methotrexate and the corresponding pre-filled syringe for assembly with the device manufactured by us, along with the commercialization and distribution of OTREXUP. OTREXUP is a SC methotrexate injection for once weekly self-administration with an easy-to-use, single dose, disposable auto injector, indicated for adults with severe active rheumatoid arthritis (“RA”), children with active polyarticular juvenile idiopathic arthritis and adults with severe recalcitrant psoriasis. Further, we entered into a license agreement with Otter in which we granted Otter a worldwide, exclusive, fully paid-up license to certain patents relating to OTREXUP that may also relate to our other products for Otter to commercialize and otherwise exploit OTREXUP in the field as defined in the license agreement.

Results of Operations

Three Months Ended March 31, 2024 Compared to Three Months Ended March 31, 2023

Royalties – Royalties were as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Royalties	$	120,593	$	99,640	$	20,953	21	%

The increase in royalties was primarily driven by continued sales uptake of DARZALEX SC by Janssen and Phesgo by Roche in all geographies and the launch of Vyvgart by argenx, partially offset by slightly lower sales of Herceptin SC and MabThera SC by Roche. We expect royalty revenue to continue to grow as a result of our 2020 and 2023 ENHANZE partner product launches, offsetting the ongoing impact from IV biosimilars on pricing of mature partner products delivered SC with ENHANZE and the impact of a royalty rate reduction in March of 2024 for certain sales of DARZALEX SC outside of the U.S.

Product Sales, Net – Product sales, net were as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Proprietary product sales	$	35,254	$	27,961	$	7,293	26	%
Bulk rHuPH20 sales	10,511		22,069		(11,558)		(52)	%
Device partnered product sales	12,818		10,764		2,054		19	%
Total product sales, net	$	58,583	$	60,794	$	(2,211)	(4)	%

The decrease in product sales, net was primarily due to lower sales of bulk rHuPH20 due to the timing of shipment to our partners, partially offset by contributions from our proprietary and device partnered products. We expect sales of our proprietary products will grow in future years as we continue to gain market share in the TRT market. We expect product sales of bulk rHuPH20 and device partnered products to fluctuate in future periods based on the needs of our partners.

Revenues Under Collaborative Agreements – Revenues under collaborative agreements were as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Upfront license fees, license fees for the election of additional targets, event-based payments, license maintenance fees and amortization of deferred upfront and other license fees:

Event-based development milestones and regulatory milestones and other fees	$	14,000	$	—	$	14,000	100	%

Device licensing and development revenue	2,703		1,709		994		58	%
Total revenues under collaborative agreements	$	16,703	$	1,709	$	14,994	877	%

The increase in revenues under collaborative agreements was primarily due to the timing of milestones driven by partner activities. Revenue from upfront licenses fees, license fees for the election of additional targets, license maintenance fees and other license fees and event-based payments vary from period to period based on our ENHANZE collaboration activity. We expect these revenues to continue to fluctuate in future periods based on our partners’ ability to meet various clinical and regulatory milestones set forth in such agreements and our ability to obtain new collaborative agreements.

Operating expenses – Operating expenses were as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Cost of sales	$	28,329	$	35,170	$	(6,841)	(19)	%
Amortization of intangibles	17,763		17,835		(72)		—	%
Research and development	19,111		17,979		1,132		6	%
Selling, general and administrative	35,134		37,357		(2,223)		(6)	%

Cost of Sales – Cost of sales consists primarily of raw materials, third-party manufacturing costs, fill and finish costs, freight costs, internal costs and manufacturing overhead associated with the production of our proprietary products, device partnered products and bulk rHuPH20. The decrease in cost of sales was primarily due to lower bulk rHuPH20 sales, partially offset by higher proprietary product sales.

Amortization of intangibles – Amortization of intangibles consists primarily of expense associated with the amortization of acquired device technologies and product rights. Amortization of intangibles expense remained flat year over year.

Research and Development – Research and development expenses consist of external costs, salaries and benefits and allocation of facilities and other overhead expenses related to research manufacturing, preclinical and regulatory activities related to our collaborations, and our development platforms. The increase in research and development expense was primarily due to planned investments in ENHANZE.

Selling, General and Administrative – Selling, general and administrative (“SG&A”) expenses consist primarily of salaries and related costs for personnel in executive, selling and administrative functions as well as professional fees for legal and accounting, business development, commercial operations support for proprietary products and alliance management and marketing support for our collaborations. The decrease in SG&A expense was primarily due to reductions in commercial marketing expense, partially offset by increased compensation expense.

Investment and other income (expense), net - Investment and other income (expense), net was as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Investment and other income, net	$	4,993	$	2,979	$	2,014	68	%

Investment and other income (expense), net consists primarily of interest income on our cash, cash-equivalent and marketable securities. The increase in investment and other income, net was primarily due to a significant increase in market interest rates as well as an increase in the average invested balance.

Interest Expense – Interest expense was as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Interest expense	$	4,507	$	4,543	$	(36)	(1)	%

Interest expense consists primarily of costs related to our convertible notes and revolving credit facility. Interest expense remained flat year over year.

Income Taxes – Income taxes were as follows (in thousands):


	Three Months Ended				Increase / (Decrease)
	March 31,
	2024		2023		Dollar		Percentage
Income tax expense	$	19,205	$	12,623	$	6,582	52	%

The increase in income tax expense was primarily due to higher income before taxes recognized during the current quarter. Our annual effective tax rate is estimated to be approximately 20% for 2024, which differs from the U.S. federal statutory rate due to state income taxes, nondeductible executive compensation, research and development credit generation and the reduced rate on foreign export sales.

Liquidity and Capital Resources

Overview

Our principal sources of liquidity are our existing cash, cash equivalents and available-for-sale marketable securities. As of March 31, 2024, we had cash, cash equivalents and marketable securities of $463.5 million. We believe that our current cash, cash equivalents and marketable securities will be sufficient to fund our operations for at least the next twelve months. We expect to fund our operations going forward with existing cash resources, anticipated revenues from our existing collaborative agreements and cash that we may raise through future transactions. We may raise cash through any one of the following financing vehicles: (i) new collaborative agreements; (ii) expansions or revisions to existing collaborative relationships; (iii) private financings; (iv) other equity or debt financings; (v) monetizing assets; and/or (vi) the public offering of securities.

We may, in the future, draw on our existing line of credit or offer and sell additional equity, debt securities and warrants to purchase any of such securities, either individually or in units to raise capital for additional working capital, capital expenditures, share repurchases, acquisitions or for other general corporate purposes.

Cash Flows


	Three Months Ended March 31,

	2024		2023		Change
Net cash provided by operating activities	$	129,427	$	86,964	$	42,463
Net cash used in investing activities	(82,681)		(60,162)		(22,519)
Net cash used in financing activities	(489)		(164,614)		164,125
Net increase (decrease) in cash, cash equivalents and restricted cash	$	46,257	$	(137,812)	$	184,069

Operating Activities

The increase in net cash provided by operations was primarily due to an increase in revenue and a reduction in working capital spend.

Investing Activities

The increase in net cash used in investing activities was primarily due an increase in net purchases of marketable securities, partially offset by a decrease in capital spend for property and equipment.

Financing Activities

The decrease in net cash used in financing activities was primarily due to the repurchase of $150.1 million in common stock in the prior year and $13.5 million in cash paid on the conversion of our 2024 Convertible Notes in the prior year.

Share Repurchases

In December 2021, our Board of Directors approved a share repurchase program to repurchase up to $750.0 million of our outstanding common stock which is expected to be completed in the second quarter of 2024. In February 2024, our Board of Directors authorized a new capital return program to repurchase up to $750.0 million of our outstanding common stock. Refer to Note 9, Stockholders’ Equity, of our condensed consolidated financial statements for additional information regarding our share repurchases.

Long-Term Debt

1.00% Convertible Notes due 2028

The 2028 Convertible Notes pay interest semi-annually in arrears on February 15th and August 15th of each year at an annual rate of 1.00%. The 2028 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2028 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2028 Convertible Notes have a maturity date of August 15, 2028.

Capped Call Transactions

0.25% Convertible Notes due 2027

The 2027 Convertible Notes pay interest semi-annually in arrears on March 1st and September 1st of each year at an annual rate of 0.25%. The 2027 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2027 Convertible Notes, will rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2027 Convertible Notes have a maturity date of March 1, 2027.

Upon conversion, we will pay cash for the settlement of principal, and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2027 Convertible Notes is 12.9576 shares of common stock per $1,000 in principal amount of 2027 Convertible Notes, equivalent to a conversion price of approximately $77.17 per share of our common stock. The conversion rate is subject to adjustment.

1.25% Convertible Notes due 2024

Revolving Credit and Term Loan Facilities (May 2022)

Borrowings under the 2022 Facility bear interest, at our option, at a rate equal to an applicable margin plus: (a) the applicable Term Secured Overnight Financing Rate (“SOFR”) (which includes a SOFR adjustment of 0.10%), or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the Bank of America prime rate, (3) the Term SOFR rate for an interest period of one month plus 1.10%, and (4) 1.00%. The margin for the 2022 Facility ranges, based on our consolidated total net leverage ratio, from 0.25% to 1.25% in the case of base rate loans and from 1.25% to 2.25% in the case of Term SOFR rate loans. In addition to paying interest on the outstanding principal under the 2022 Facility, we will pay (i) a commitment fee in respect of the unutilized commitments thereunder and (ii) customary letter of credit fees and agency fees. The commitment fees range from 0.15% to 0.35% per annum based on our consolidated net leverage ratio.

As of March 31, 2024, the revolving credit facility was undrawn.

Additional Capital Requirements.

Our expected working capital and other capital requirements are described in “Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2023. As of March 31, 2024, there have been no material changes to our expected working capital and other capital requirements described in our Annual Report on Form 10-K for the year ended December 31, 2023.

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations are based on our condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The preparation of our condensed consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities.

Our significant accounting policies are described in Part II, Item 8, Note 2, Summary of Significant Accounting Policies, to the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023. The accounting policies and estimates that are most critical to a full understanding and evaluation of our reported financial results are described in Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations of our Annual Report on Form 10-K for the year ended December 31, 2023. There were no material changes to our critical accounting policies or estimates during the three months ended March 31, 2024.

Recent Accounting Pronouncements

Refer to Note 2, Summary of Significant Accounting Policies, of our condensed consolidated financial statements for a discussion of recent accounting pronouncements and their effect, if any.

Item 3.Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes in our market risks during the quarter ended March 31, 2024.

As of March 31, 2024, our cash equivalents and marketable securities consisted of investments in money market funds, asset-backed securities, U.S. Treasury securities, corporate debt securities, agency bonds and commercial paper. These investments were made in accordance with our investment policy which specifies the categories, allocations, and ratings of securities we may consider for investment. The primary objective of our investment activities is to preserve principal while at the same time maximizing the income we receive without significantly increasing risk. Some of the financial instruments that we invest in could be subject to market risk. This means that a change in prevailing interest rates may cause the value of the instruments to fluctuate. For example, if we purchase a security that was issued with a fixed interest rate and the prevailing interest rate later rises, the value of that security may decline. Based on our current investment portfolio as of March 31, 2024, we do not believe that our results of operations would be materially impacted by an immediate change of 10% in interest rates.

We hedge a portion of foreign currency exchange risk associated with forecasted royalties revenue denominated in Swiss francs to reduce the risk of our earnings and cash flows being adversely affected by fluctuations in exchange rates. These transactions are designated and qualify as cash flow hedges. The cash flow hedges are carried at fair value with mark-to-market gains and losses recorded within AOCI in our condensed consolidated balance sheets and reclassified to royalty revenue in our condensed consolidated statements of income in the same period as the recognition of the underlying hedged transaction. We do not issue derivatives, derivative commodity instruments or other financial instruments for speculative trading purposes.

Further, we do not believe our cash, cash equivalents and marketable securities have significant risk of default or illiquidity. We made this determination based on discussions with our investment advisors and a review of our holdings. While we believe our cash, cash equivalents and marketable securities do not contain excessive risk, we cannot provide absolute assurance that in the future our investments will not be subject to adverse changes in market value. All of our cash equivalents and marketable securities are recorded at fair market value.

Item 4.Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the timelines specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decision regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can only provide reasonable assurance of achieving the desired control objectives, and in reaching a reasonable level of assurance, management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of our disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, as amended. Based on this evaluation, our principal executive officer and our principal financial officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this Quarterly Report on Form 10-Q.

Changes in Internal Control Over Financial Reporting

There have been no significant changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2024 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II – OTHER INFORMATION

Item 1.Legal Proceedings

Item 1A.Risk Factors

There have been no material changes to the risk factors set forth under Part I, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2023.

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

In December 2021, the Board of Directors authorized a capital return program to repurchase up to $750.0 million of outstanding stock over a three-year period. We accelerated the initiation of our planned 2024 share repurchases and in November 2023, we entered into an ASR agreement with Bank of America, N.A. to accelerate the remaining $250.0 million of share repurchases under the approved capital return program. Pursuant to the agreement, at the inception of the ASR, we paid $250.0 million to Bank of America, N.A. and took initial delivery of 5.5 million shares.

In February 2024, our Board of Directors authorized a new capital return program to repurchase up to $750.0 million of our outstanding common stock.

Item 3.Defaults Upon Senior Securities

Not applicable.

Item 4.Mine Safety Disclosures

Not applicable.

Item 5.Other Information

During the fiscal quarter ended ended March 31, 2024, the following officers adopted or terminated any Rule 10b5-1 trading arrangement (as such terms are defined pursuant to Item 408(a) of Regulation S-K) as noted in the table below.

Trading Arrangement

Name and Title

Action

Date

Rule 10b5-1*

Non-Rule 10b5-1**

Total Shares To Be Sold

Expiration Date

Helen Torley

Termination

1/30/2024

500,000

Terminated(1)

President and Chief Executive Officer

Helen Torley

Adoption

3/22/2024

110,000

(2)

The earlier of 02/13/2025 or date all shares are sold

President and Chief Executive Officer

Nicole LaBrosse

Adoption

3/22/2024

35,000

(2)

The earlier of 06/25/2025 or date all shares are sold

Senior Vice President and Chief Financial Officer

* Contract, instruction or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

** Non-Rule 10b5-1 trading arrangement” as defined in Item 408(c) of Regulation S-K under the Exchange Act.

(1)The duration of the trading arrangement was until May 30, 2024, or earlier if all transaction under the trading arrangement had been completed. At the time of termination, no shares had been sold under the trading arrangement.

(2)Represents a sale of common shares acquired upon exercise of stock options with ten-year term expiring in 2025.

Item 6.Exhibits


3.1						Amended and Restated Certificate of Incorporation of Halozyme Therapeutics, Inc. (filed as Exhibit 3.1 to the Company’s Form 8-K filed April 26, 2024 and incorporated herein by reference)

3.2						Bylaws, as amended (filed as Exhibit 3.1 to the Company’s Form 8-K filed December 10, 2021 and incorporated herein by reference)

4.1						Indenture, dated March 1, 2021, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed as Exhibit 4.1 to the Company’s Form 8-K filed March 1, 2021 and incorporated herein by reference )

4.2						Form of Note, dated March 1, 2021, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee, (filed as Exhibit 4.2 to the Company’s Form 8-K filed March 1, 2021 and incorporated herein by reference )

4.3						Indenture, dated August 18, 2022, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee, (filed as Exhibit 4.1 to the Company’s Form 8-K filed August 18, 2022 and incorporated herein by reference )

4.4						Form of Note, dated August 18, 2022, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee, (included within Exhibit 4.1) (filed as Exhibit 4.2 to the Company’s Form 8-K filed August 18, 2022 and incorporated herein by reference )

31.1						Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended (filed herewith)

31.2						Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended (filed herewith)

32						Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

101.INS						Instance Document - the instance document does not appear in the interactive Data File because its XBRL tags are embedded within the Inline XBRL document (filed herewith)

101.SCH						Inline Taxonomy Extension Schema Document (filed herewith)

101.CAL						Inline Taxonomy Extension Calculation Linkbase Document (filed herewith)

101.DEF						Inline Taxonomy Extension Definition Linkbase Document (filed herewith)

101.LAB						Inline Taxonomy Extension Label Linkbase Document (filed herewith)

101.PRE						Inline Taxonomy Extension Presentation Linkbase Document (filed herewith)

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

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.


		Halozyme Therapeutics, Inc. (Registrant)


Dated:	May 7, 2024	/s/ Helen I. Torley, M.B. Ch.B., M.R.C.P.
		Helen I. Torley, M.B. Ch.B., M.R.C.P. President and Chief Executive Officer (Principal Executive Officer)



Dated:	May 7, 2024	/s/ Nicole LaBrosse
		Nicole LaBrosse Senior Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Helen I. Torley, M.B. Ch.B., M.R.C.P., Chief Executive Officer of Halozyme Therapeutics, Inc. certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Halozyme 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 Rules 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 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 (the Registrant’s fourth fiscal quarter in the case of an annual report) 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 the 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.

Dated:

May 7, 2024

/s/ Helen I. Torley, M.B. Ch.B., M.R.C.P.

Helen I. Torley, M.B. Ch.B., M.R.C.P

President and Chief Executive Officer

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Nicole LaBrosse, Chief Financial Officer of Halozyme Therapeutics, Inc. certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Halozyme 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.

Dated:

May 7, 2024

/s/ Nicole LaBrosse

Nicole LaBrosse

Senior Vice President and Chief Financial Officer

EXHIBIT 32

CERTIFICATION OF

CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

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 of Halozyme Therapeutics, Inc. (the “Registrant”) on Form 10-Q for the quarter ended March 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Helen I. Torley, M.B. Ch.B., M.R.C.P., Chief Executive Officer of the Registrant, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m); and

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

Dated:

May 7, 2024

/s/ Helen I. Torley, M.B. Ch.B., M.R.C.P.

Helen I. Torley, M.B. Ch.B., M.R.C.P.

President and Chief Executive Officer

In connection with the Quarterly Report of Halozyme Therapeutics, Inc. (the “Registrant”) on Form 10-Q for the quarter ended March 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Nicole LaBrosse, Chief Financial Officer of the Registrant, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m); and

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

Dated:

May 7, 2024

/s/ Nicole LaBrosse

Nicole LaBrosse

Senior Vice President and Chief Financial Officer

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2024	Apr. 30, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-32335
Entity Registrant Name	HALOZYME THERAPEUTICS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-0488686
Entity Address, Address Line One	12390 El Camino Real
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92130
City Area Code	858
Local Phone Number	794-8889
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	HALO
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		127,274,000
Entity Central Index Key	0001159036
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 164,627	$ 118,370
Marketable securities, available-for-sale	298,824	217,630
Accounts receivable, net and contract assets	195,902	234,210
Inventories, net	168,541	127,601
Prepaid expenses and other current assets	45,690	48,613
Total current assets	873,584	746,424
Property and equipment, net	78,071	74,944
Prepaid expenses and other assets	17,319	17,816
Goodwill	416,821	416,821
Intangible assets, net	455,116	472,879
Deferred tax assets, net	616	4,386
Total assets	1,841,527	1,733,270
Current liabilities
Accounts payable	13,325	11,816
Accrued expenses	118,314	100,678
Total current liabilities	131,639	112,494
Long-term debt, net	1,500,879	1,499,248
Other long-term liabilities	31,201	37,720
Total liabilities	1,663,719	1,649,462
Commitments and contingencies (Note 11)
Stockholders’ equity
Preferred stock - $0.001 par value; 20,000 shares authorized; no shares issued and outstanding	0	0
Common stock - $0.001 par value; 300,000 shares authorized; 127,186 and 126,770 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	127	127
Additional paid-in capital	11,794	2,409
Accumulated other comprehensive loss	(1,486)	(9,278)
Retained earnings	167,373	90,550
Total stockholders’ equity	177,808	83,808
Total liabilities and stockholders’ equity	$ 1,841,527	$ 1,733,270

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	127,186,000	126,770,000
Common stock, shares outstanding (in shares)	127,186,000	126,770,000

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Total revenues	$ 195,879	$ 162,143
Operating expenses
Cost of sales	28,329	35,170
Amortization of intangibles	17,763	17,835
Research and development	19,111	17,979
Selling, general and administrative	35,134	37,357
Total operating expenses	100,337	108,341
Operating income	95,542	53,802
Other income (expense)
Investment and other income, net	4,993	2,979
Interest expense	(4,507)	(4,543)
Net income before income taxes	96,028	52,238
Income tax expense	19,205	12,623
Net income	$ 76,823	$ 39,615
Earnings per share
Basic (USD per share)	$ 0.61	$ 0.29
Diluted (USD per share)	$ 0.60	$ 0.29
Weighted average common shares outstanding
Basic (shares)	126,941	135,027
Diluted (shares)	128,887	137,900
Royalties
Revenues
Total revenues	$ 120,593	$ 99,640
Product sales, net
Revenues
Total revenues	58,583	60,794
Revenues under collaborative agreements
Revenues
Total revenues	$ 16,703	$ 1,709

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 76,823	$ 39,615
Other comprehensive income
Unrealized (loss) gain on marketable securities	(313)	924
Foreign currency translation adjustment	8	22
Unrealized gain on derivative instruments, net	8,615	0
Realized gain on derivative instruments, net	(518)	0
Comprehensive income	$ 84,615	$ 40,561

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income	$ 76,823	$ 39,615
Adjustments to reconcile net income to net cash provided by operating activities
Share-based compensation	9,874	7,966
Depreciation and amortization	2,443	2,622
Amortization of intangibles	17,763	17,835
Amortization of debt discount	1,830	1,835
Amortization of premium on marketable securities, net	(2,365)	(917)
Realized gain on marketable securities	(7)	0
Lease payments deferred	220	320
Deferred income taxes	1,291	3,874
Changes in operating assets and liabilities
Accounts receivable, net and other contract assets	38,308	36,189
Inventories, net	(40,233)	(7,250)
Prepaid expenses and other assets	4,795	8,881
Accounts payable and accrued expenses	18,685	(24,006)
Net cash provided by operating activities	129,427	86,964
Investing activities
Purchases of marketable securities	(198,763)	(109,919)
Proceeds from sales and maturities of marketable securities	119,627	61,134
Purchases of property and equipment	(3,545)	(11,377)
Net cash used in investing activities	(82,681)	(60,162)
Financing activities
Repayment of 2024 Convertible Notes	0	(13,483)
Repurchase of common stock	0	(150,083)
Taxes paid related to net share settlement, net of proceeds from issuance of common stock under equity incentive plans	(489)	(1,048)
Net cash used in financing activities	(489)	(164,614)
Net increase (decrease) in cash, cash equivalents and restricted cash	46,257	(137,812)
Cash, cash equivalents and restricted cash at beginning of period	118,370	234,695
Cash, cash equivalents and restricted cash at end of period	164,627	96,883
Supplemental disclosure of non-cash investing and financing activities
Amounts accrued for purchases of property and equipment	1,515	390
Right-of-use assets obtained in exchange for lease obligation	1,242	406
Common stock issued for conversion of 2024 Convertible Notes	$ 0	$ 125

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings
Equity, beginning balance (in shares) at Dec. 31, 2022		135,154
Equity, beginning balance at Dec. 31, 2022	$ 169,798	$ 135	$ 27,368	$ (922)	$ 143,217
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	7,966		7,966
Issuance of common stock for the conversion of the 2024 Convertible Notes (in shares)		289
Issuance of common stock for the conversion of the 2024 Convertible Notes	(126)		(126)
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net (in shares)		384
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net	(1,048)	$ 1	(1,049)
Repurchase of common stock (shares)		(4,165)
Repurchase of common stock	(151,301)	$ (4)	(34,159)		(117,138)
Other comprehensive income (loss)	946			946
Net income	39,615				39,615
Equity, ending balance (in shares) at Mar. 31, 2023		131,662
Equity, ending balance at Mar. 31, 2023	65,850	$ 132	0	24	65,694
Equity, beginning balance (in shares) at Dec. 31, 2023		126,770
Equity, beginning balance at Dec. 31, 2023	83,808	$ 127	2,409	(9,278)	90,550
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	9,874		9,874
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net (in shares)		416
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net	(489)		(489)
Other comprehensive income (loss)	7,792			7,792
Net income	76,823				76,823
Equity, ending balance (in shares) at Mar. 31, 2024		127,186
Equity, ending balance at Mar. 31, 2024	$ 177,808	$ 127	$ 11,794	$ (1,486)	$ 167,373

Organization and Business	3 Months Ended
Organization and Business	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business	Organization and Business Halozyme Therapeutics, Inc. is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies. As the innovators of ENHANZE® drug delivery technology (“ENHANZE”) with our proprietary enzyme, rHuPH20, our commercially validated solution is used to facilitate the subcutaneous (“SC”) delivery of injected drugs and fluids with the goal of reducing the treatment burden for patients. We license our technology to biopharmaceutical companies to collaboratively develop products that combine ENHANZE with our partners’ proprietary compounds. We also develop, manufacture and commercialize, for ourselves or with our partners, drug-device combination products using our advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence. Our ENHANZE partners’ approved products and product candidates are based on rHuPH20, our patented recombinant human hyaluronidase enzyme. rHuPH20 works by breaking down hyaluronan (“HA”), a naturally occurring carbohydrate that is a major component of the extracellular matrix of the SC space. This temporarily reduces the barrier to bulk fluid flow allowing for improved and more rapid SC delivery of high dose, high volume injectable biologics, such as monoclonal antibodies and other large therapeutic molecules, as well as small molecules and fluids. We refer to the application of rHuPH20 to facilitate the delivery of other drugs or fluids as ENHANZE. We license our ENHANZE technology to form collaborations with biopharmaceutical companies that develop or market drugs requiring or benefiting from injection via the SC route of administration. In the development of proprietary intravenous (“IV”) drugs combined with our ENHANZE technology, data has been generated supporting the potential for ENHANZE to reduce patient treatment burden, as a result of shorter duration of SC administration with ENHANZE compared to IV administration. ENHANZE may enable fixed-dose SC dosing compared to weight-based dosing typically required for IV administration, extend the dosing interval for drugs that are already administered subcutaneously and potentially allow for lower rates of infusion-related reactions. ENHANZE may enable more flexible treatment options such as home administration by a healthcare professional or potentially the patient or caregiver. Lastly, certain proprietary drugs co-formulated with ENHANZE have been granted additional exclusivity, extending the patent life of the product beyond the patent expiry of the proprietary IV drug. We currently have ENHANZE collaborations and licensing agreements with F. Hoffmann-La Roche, Ltd. and Hoffmann-La Roche, Inc. (“Roche”), Takeda Pharmaceuticals International AG and Baxalta US Inc. (“Takeda”), Pfizer Inc. (“Pfizer”), Janssen Biotech, Inc. (“Janssen”), AbbVie, Inc. (“AbbVie”), Eli Lilly and Company (“Lilly”), Bristol-Myers Squibb Company (“BMS”), argenx BVBA (“argenx”), ViiV Healthcare (the global specialist HIV Company majority owned by GlaxoSmithKline) (“ViiV”), Chugai Pharmaceutical Co., Ltd. (“Chugai”) and Acumen Pharmaceuticals, Inc. (“Acumen”). In addition to receiving upfront licensing fees from our ENHANZE collaborations, we are entitled to receive event and sales-based milestone payments, revenues from the sale of bulk rHuPH20 and royalties from commercial sales of approved partner products co-formulated with ENHANZE. We currently earn royalties from sales of seven commercial products including sales of one commercial product from each of the Takeda, Janssen and argenx collaborations and four commercial products products from the Roche collaboration. We have commercialized auto-injector products with several pharmaceutical companies including Teva Pharmaceutical Industries, Ltd. (“Teva”) and Otter Pharmaceuticals, LLC (“Otter”). We have development programs including auto-injectors with Idorsia Pharmaceuticals Ltd. (“Idorsia”). Our commercial portfolio of proprietary products includes Hylenex®, utilizing rHuPH20, and XYOSTED®, utilizing our auto-injector technology. Except where specifically noted or the context otherwise requires, references to “Halozyme,” “the Company,” “we,” “our,” and “us” in these notes to our condensed consolidated financial statements refer to Halozyme Therapeutics, Inc. and each of its directly and indirectly wholly owned subsidiaries as disclosed in Note 2, Summary of Significant Accounting Policies.

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Basis of Presentation

Use of Estimates

Cash Equivalents and Marketable Securities

Fair Value of Financial Instruments

Accounts Receivable, net

Inventories

Leases

Property and Equipment, Net

Impairment of Long-Lived Assets

Comprehensive Income

Comprehensive income is defined as the change in equity during the period from transactions and other events and circumstances from non-owner sources.

Convertible Notes

Cash Flow Hedges - Currency Risks

Business Combinations

Goodwill, Intangible Assets and Other Long-Lived Asset

asset is amortized over its estimated useful life. If the relevant research and development project is abandoned, the IPR&D asset is expensed in the period of abandonment.

Revenue Recognition

ENHANZE and Device Royalties

Revenue under ENHANZE and Device Collaborative Agreements

ENHANZE Collaboration and License Agreements

Device License, Development and Supply Arrangements

Refer to Note 4, Revenue, for further discussion on our collaborative arrangements.

Product Sales, Net

Proprietary Product Sales

Partnered Product Sales

Bulk rHuPH20

Devices

Cost of Sales

Research and Development Expenses

Share-Based Compensation

Income Taxes

Segment Information

Adoption and Pending Adoption of Recent Accounting Pronouncements

The following table provides a brief description of recently issued accounting standards, those adopted in the current period and those not yet adopted:

Standard

Description

Effective Date

Adoption Method

Effect on the Financial
Statements or Other Significant Matters

Retrospective

We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures.

Annual periods beginning after December 15, 2024 (our 2025 Form 10-K) - Early adoption is permitted

Prospective or Retrospective

We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.

Fair Value Measurement

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurement

Available-for-sale marketable securities consisted of the following (in thousands):


	March 31, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Asset-backed securities	$	2,384	$	—	$	(5)	$	2,379
Corporate debt securities	43,118		2		(64)		43,056
U.S. treasury securities	239,347		36		(106)		239,277

Agency bonds	9,180		—		(22)		9,158
Commercial paper	4,954		—		—		4,954
Total marketable securities, available-for-sale	$	298,983	$	38	$	(197)	$	298,824


	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Asset-backed securities	$	3,512	$	—	$	(8)	$	3,504
Corporate debt securities	6,022		1		(10)		6,013
U.S. treasury securities	175,996		200		(12)		176,184
Agency bonds	16,119		—		(16)		16,103

Commercial paper	15,826		—		—		15,826
Total marketable securities, available-for-sale	$	217,475	$	201	$	(46)	$	217,630

The estimated fair value of our contractual maturities of available-for-sale debt securities were as follows (in thousands):


	March 31, 2024		December 31, 2023

Due within one year	$	235,059	$	197,633
Due after one year but within five years	63,765		19,997
Total estimated fair value of contractual maturities, available-for-sale	$	298,824	$	217,630


	March 31, 2024						December 31, 2023
	Level 1		Level 2		Total Estimated Fair Value		Level 1		Level 2		Total Estimated Fair Value
Assets
Cash equivalents
Money market funds	$	20,276	$	—	$	20,276	$	22,142	$	—	$	22,142
U.S. treasury securities	30,000		—		30,000		2,000		—		2,000


Available-for-sale marketable securities
Asset-backed securities	—		2,379		2,379		—		3,504		3,504
Corporate debt securities	—		43,056		43,056		—		6,013		6,013
U.S. treasury securities	239,277		—		239,277		176,184		—		176,184
Agency bonds	9,158		—		9,158		16,103		—		16,103

Commercial paper	—		4,954		4,954		—		15,826		15,826
Derivative instruments
Currency hedging contracts (1)	—		1,574		1,574		—		—		—
Total assets	$	298,711	$	51,963	$	350,674	$	216,429	$	25,343	$	241,772

Liabilities
Derivative instruments
Currency hedging contracts (1)	$	—	$	478	$	478	$	—	$	9,480	$	9,480

We had no available for sale securities that were classified within Level 3 as of March 31, 2024 and December 31, 2023.

Revenue

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue

Our disaggregated revenues were as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Royalties	$	120,593	$	99,640

Product sales, net
Proprietary product sales	35,254		27,961
Bulk rHuPH20 sales	10,511		22,069
Device partnered product sales	12,818		10,764
Total product sales, net	58,583		60,794

Revenues under collaborative agreements

Event-based development and regulatory milestones and other fees	14,000		—

Device licensing and development revenue	2,703		1,709
Total revenues under collaborative agreements	16,703		1,709

Total revenues	$	195,879	$	162,143

Accounts receivable, other contract assets and deferred revenues (contract liabilities) from contracts with customers, including partners, consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Accounts receivable, net	$	185,313	$	233,254
Other contract assets	10,589		956
Deferred revenues	4,595		4,048

Certain Balance Sheet Items

3 Months Ended

Mar. 31, 2024

Balance Sheet Related Disclosures [Abstract]

Certain Balance Sheet Items

Accounts receivable, net and contract assets consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Accounts receivable from product sales to partners	$	27,045	$	58,588
Accounts receivable from revenues under collaborative agreements	2,078		16,183
Accounts receivable from royalty payments	115,413		118,170
Accounts receivable from other product sales	46,986		47,060

Contract assets	10,589		956
Total accounts receivable and contract assets	202,111		240,957
Allowance for distribution fees and discounts	(6,209)		(6,747)
Total accounts receivable, net and contract assets	$	195,902	$	234,210

Inventories, consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Raw materials	$	29,112	$	23,646
Work-in-process	43,611		34,025
Finished goods	95,818		69,930
Total inventories, net	$	168,541	$	127,601

Prepaid expenses and other assets consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Prepaid manufacturing expenses	$	36,211	$	36,850

Other prepaid expenses	13,847		12,902
Other assets	12,951		16,677
Total prepaid expenses and other assets	63,009		66,429
Less: Long-term portion	(17,319)		(17,816)
Total prepaid expenses and other assets, current	$	45,690	$	48,613

Property and equipment, net consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Research equipment	$	8,690	$	8,588
Manufacturing equipment	36,364		32,472
Computer and office equipment	10,888		9,722
Leasehold improvements	7,124		6,987
Subtotal	63,066		57,769
Accumulated depreciation and amortization	(21,180)		(19,661)
Subtotal	41,886		38,108
Right of use of assets	36,185		36,836
Property and equipment, net	$	78,071	$	74,944

Accrued expenses consisted of the following (in thousands):


	March 31, 2024		December 31, 2023

Accrued compensation and payroll taxes	$	10,442	$	17,361
Accrued outsourced manufacturing expenses	27,456		12,361
Income taxes payable	19,074		963
Product returns and sales allowance	39,941		41,932
Other accrued expenses	20,839		33,584
Lease liability	31,763		32,197
Total accrued expenses	149,515		138,398
Less long-term portion	(31,201)		(37,720)
Total accrued expenses, current	$	118,314	$	100,678

Cash paid for amounts related to leases for the three months ended March 31, 2024 and 2023 was $1.8 million and $1.7 million, respectively.

Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill

A summary of the activity impacting goodwill is presented below (in thousands):


Balance as of December 31, 2023	$	416,821
Adjustment	—
Balance as of March 31, 2024	$	416,821

Intangible Assets


	Weighted Average Useful Life (in years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Auto Injector technology platform	7	$	402,000	$	106,521	$	295,479
XYOSTED proprietary product	10	136,200		25,263		110,937

Total finite-lived intangibles, net		$	538,200	$	131,784	$	406,416
ATRS-1902 (IPR&D)	Indefinite					48,700
Total intangibles, net						$	455,116


Year	Amortization Expense
Remainder of 2024	$	53,286
2025	71,049
2026	71,049
2027	71,049
2028	71,049
Thereafter	68,934
Total	$	406,416

Long-Term Debt, Net

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Long-Term Debt, Net

1.00% Convertible Notes due 2028

As of March 31, 2024, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition.

Capped Call Transactions

0.25% Convertible Notes due 2027

As of March 31, 2024, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition.

1.25% Convertible Notes due 2024

Net Carrying Amounts of our Convertible Notes

The carrying amount and fair value of our Convertible Notes were as follows (in thousands).


	March 31, 2024		December 31, 2023
Principal amount

2027 Convertible Notes	$	805,000	$	805,000
2028 Convertible Notes	720,000		720,000
Total principal amount	$	1,525,000	$	1,525,000

Unamortized debt discount

2027 Convertible Notes	$	(10,094)	$	(10,950)
2028 Convertible Notes	(14,027)		(14,802)
Total unamortized debt discount	$	(24,121)	$	(25,752)

Carrying amount

2027 Convertible Notes	$	794,906	$	794,050
2028 Convertible Notes	705,973		705,198
Total carrying amount	$	1,500,879	$	1,499,248

Fair value based on trading levels (Level 2):

2027 Convertible Notes	$	714,244	$	695,826
2028 Convertible Notes	702,403		670,522
Total fair value of outstanding notes	$	1,416,647	$	1,366,348

Remaining amortization per period of debt discount (in years):

2027 Convertible Notes	2.9		3.2
2028 Convertible Notes	4.4		4.6

The following table summarizes the components of interest expense and the effective interest rates for each of our Convertible Notes (in thousands).


	Three Months Ended March 31,
	2024			2023
Coupon interest
2024 Convertible Notes	$	—		$	36
2027 Convertible Notes	503			503
2028 Convertible Notes	1,800			1,800
Total coupon interest	$	2,303		$	2,339

Amortization of debt discount
2024 Convertible Notes	$	—		$	24
2027 Convertible Notes	856			850
2028 Convertible Notes	775			764
Total amortization of debt discount	$	1,631		$	1,638

Interest expense
2024 Convertible Notes	$	—		$	60
2027 Convertible Notes	1,359			1,353
2028 Convertible Notes	2,575			2,564
Total interest expense	$	3,934		$	3,977

Effective interest rates

2027 Convertible Notes	0.7		%	0.7		%
2028 Convertible Notes	1.5		%	1.5		%

Revolving Credit and Term Loan Facilities (May 2022)

Share-based Compensation

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Share-based Compensation

The following table summarized share-based compensation expense included in our condensed consolidated statements of income related to share-based awards (in thousands):


	Three Months Ended March 31,
	2024		2023
Research and development	$	3,345	$	3,101
Selling, general and administrative	6,529		4,865
Total share-based compensation expense	$	9,874	$	7,966

Share-based compensation expense by type of share-based award was as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Stock options	$	4,299	$	3,455
RSUs, PSUs and ESPP	5,575		4,511
Total share-based compensation expense	$	9,874	$	7,966


	Three Months Ended March 31,
	2024	2023
Expected volatility	40.02 - 40.08%	39.68 - 39.98%
Average expected term (in years)	5.0	4.8
Risk-free interest rate	3.80 - 4.28%	3.48 - 4.27%
Expected dividend yield	—	—


	March 31, 2024
	Unrecognized Expense		Remaining Weighted-Average Recognition Period (in years)
Stock options	$	42,038	2.70

RSUs	56,513		3.05
PSUs	11,543		2.30
ESPP	118		0.21

Stockholders' Equity	3 Months Ended
Stockholders' Equity	Mar. 31, 2024
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity During the three months ended March 31, 2024 and 2023, we issued an aggregate of 154,556 and 143,931 shares of common stock, respectively, in connection with the exercises of stock options at a weighted average exercise price of $17.47 and $16.87 per share, respectively, for net proceeds of approximately $2.7 million and $2.4 million, respectively. For the three months ended March 31, 2024 and 2023, we issued 262,195 and 239,919 shares of common stock, respectively, upon vesting of certain RSUs and PSUs for which the RSU and PSU holders surrendered 88,825 and 70,733 RSUs and PSUs, respectively, to pay for minimum withholding taxes totaling approximately $6.0 million and $6.5 million, respectively. Stock options and unvested restricted units totaling approximately 8.7 million and 7.8 million shares of our common stock were outstanding as of March 31, 2024 and December 31, 2023, respectively. Share Repurchases In December 2021, the Board of Directors authorized a second capital return program to repurchase up to $750.0 million of outstanding stock over a three-year period. During 2021, we repurchased 3.9 million shares of common stock for $150.0 million at an average price of $38.51. During 2022, we repurchased 4.5 million shares of common stock for $200.0 million at an average price of $44.44. We accelerated the initiation of our planned 2024 share repurchases and in November 2023, we entered into an Accelerated Share Repurchase (“ASR”) agreement with Bank of America, N.A. to accelerate the remaining $250.0 million of share repurchases under the approved capital return program. Pursuant to the agreement, at the inception of the ASR, we paid $250.0 million to Bank of America, N.A. and took initial delivery of 5.5 million shares. All shares repurchased under our capital return programs have been retired and have resumed their status of authorized and unissued shares. We continued to execute share repurchases during the three months ended March 31, 2024 under our ASR agreement with Bank of America, N.A. As of March 31, 2024, excluding the shares we received under the ASR, we have repurchased a total of 12.6 million shares for $500.0 million at an average price per share of $39.81 under our $750 million 3-year share repurchase plan. In February 2024, our Board of Directors authorized a new capital return program to repurchase up to $750.0 million of our outstanding common stock.

Earnings per share

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Earnings per share

A reconciliation of the numerators and the denominators of the basic and diluted earnings per share computations is as follows (in thousands, except per share amounts):


	Three Months Ended March 31,
	2024		2023
Numerator
Net income	$	76,823	$	39,615
Denominator
Weighted average common shares outstanding for basic earnings per share	126,941		135,027
Dilutive potential common stock outstanding
Stock options	1,607		2,173
RSUs, PSUs and ESPP	339		468
Convertible Notes	—		232
Weighted average common shares outstanding for diluted earnings per share	128,887		137,900
Earnings per share
Basic	$	0.61	$	0.29
Diluted	$	0.60	$	0.29

Shares which have been excluded from the calculation of diluted earnings per common share because their effect was anti-dilutive include the following (shares in millions):


	Three Months Ended March 31,
	2024	2023
Anti-dilutive securities (1)	28.2	26.2

(1) The anti-dilutive securities include outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and Convertible Notes

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, we may be involved in disputes, including litigation, relating to claims arising out of operations in the normal course of our business. Any of these claims could subject us to costly legal expenses and, while we generally believe that we have adequate insurance to cover many different types of liabilities, our insurance carriers may deny coverage or our policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of any such awards could have a material adverse effect on our condensed consolidated statements of income and balance sheets. Additionally, any such claims, whether or not successful, could damage our reputation and business. We currently are not a party to any legal proceedings, the adverse outcome of which, in our opinion, individually or in the aggregate, would have a material adverse effect on our condensed consolidated statements of income or balance sheets.

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 76,823	$ 39,615

Insider Trading Arrangements
shares in Thousands

3 Months Ended

Mar. 31, 2024

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

Trading Arrangement

Name and Title

Action

Date

Rule 10b5-1*

Non-Rule 10b5-1**

Total Shares To Be Sold

Expiration Date

Helen Torley

Termination

1/30/2024

500,000

Terminated(1)

President and Chief Executive Officer

Helen Torley

Adoption

3/22/2024

110,000

(2)

The earlier of 02/13/2025 or date all shares are sold

President and Chief Executive Officer

Nicole LaBrosse

Adoption

3/22/2024

35,000

(2)

The earlier of 06/25/2025 or date all shares are sold

Senior Vice President and Chief Financial Officer

* Contract, instruction or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

** Non-Rule 10b5-1 trading arrangement” as defined in Item 408(c) of Regulation S-K under the Exchange Act.

(2)Represents a sale of common shares acquired upon exercise of stock options with ten-year term expiring in 2025.

Non-Rule 10b5-1 Arrangement Adopted

false

Non-Rule 10b5-1 Arrangement Terminated

false

Helen Torley [Member]

Trading Arrangements, by Individual

Rule 10b5-1 Arrangement Terminated

true

Termination Date

1/30/2024

Arrangement Duration

328 days

Nicole LaBrosse [Member]

Trading Arrangements, by Individual

Name

Nicole LaBrosse

Title

Senior Vice President and Chief Financial Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

3/22/2024

Arrangement Duration

460 days

Aggregate Available

Helen Torley Prior Plan [Member] | Helen Torley [Member]

Trading Arrangements, by Individual

Name

Helen Torley

Title

President and Chief Executive Officer

Aggregate Available

500

Helen Torley March 2024 Plan [Member] | Helen Torley [Member]

Trading Arrangements, by Individual

Name

Helen Torley

Title

President and Chief Executive Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

3/22/2024

Aggregate Available

110

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Basis of Presentation

Consolidation

Use of Estimates

Cash Equivalents

Marketable Securities

Fair Value of Financial Instruments

Accounts Receivable, net

Inventories

Leases

Property and Equipment, Net

Impairment of Long-Lived Assets

Comprehensive Income

Comprehensive income is defined as the change in equity during the period from transactions and other events and circumstances from non-owner sources.

Convertible Notes

Cash Flow Hedges - Currency Risks

Business Combinations

Goodwill and Intangible Assets

asset is amortized over its estimated useful life. If the relevant research and development project is abandoned, the IPR&D asset is expensed in the period of abandonment.

Intangible Assets and Other Long-Lived Assets

Revenue Recognition and Cost of Sales

Revenue Recognition

ENHANZE and Device Royalties

Revenue under ENHANZE and Device Collaborative Agreements

ENHANZE Collaboration and License Agreements

Device License, Development and Supply Arrangements

Refer to Note 4, Revenue, for further discussion on our collaborative arrangements.

Product Sales, Net

Proprietary Product Sales

Partnered Product Sales

Bulk rHuPH20

Devices

Cost of Sales

Research and Development Expenses

Share-Based Compensation

Income Taxes

Segment Information

Adoption and Pending Adoption of Recent Accounting Pronouncements

The following table provides a brief description of recently issued accounting standards, those adopted in the current period and those not yet adopted:

Standard

Description

Effective Date

Adoption Method

Effect on the Financial
Statements or Other Significant Matters

Retrospective

We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures.

Annual periods beginning after December 15, 2024 (our 2025 Form 10-K) - Early adoption is permitted

Prospective or Retrospective

We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.

Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of available-for-sale marketable securities

Available-for-sale marketable securities consisted of the following (in thousands):


	March 31, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Asset-backed securities	$	2,384	$	—	$	(5)	$	2,379
Corporate debt securities	43,118		2		(64)		43,056
U.S. treasury securities	239,347		36		(106)		239,277

Agency bonds	9,180		—		(22)		9,158
Commercial paper	4,954		—		—		4,954
Total marketable securities, available-for-sale	$	298,983	$	38	$	(197)	$	298,824


	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Asset-backed securities	$	3,512	$	—	$	(8)	$	3,504
Corporate debt securities	6,022		1		(10)		6,013
U.S. treasury securities	175,996		200		(12)		176,184
Agency bonds	16,119		—		(16)		16,103

Commercial paper	15,826		—		—		15,826
Total marketable securities, available-for-sale	$	217,475	$	201	$	(46)	$	217,630

Schedule of contractual maturities of available-for-sale debt securities

The estimated fair value of our contractual maturities of available-for-sale debt securities were as follows (in thousands):


	March 31, 2024		December 31, 2023

Due within one year	$	235,059	$	197,633
Due after one year but within five years	63,765		19,997
Total estimated fair value of contractual maturities, available-for-sale	$	298,824	$	217,630

Schedule of assets measured at fair value on a recurring basis


	March 31, 2024						December 31, 2023
	Level 1		Level 2		Total Estimated Fair Value		Level 1		Level 2		Total Estimated Fair Value
Assets
Cash equivalents
Money market funds	$	20,276	$	—	$	20,276	$	22,142	$	—	$	22,142
U.S. treasury securities	30,000		—		30,000		2,000		—		2,000


Available-for-sale marketable securities
Asset-backed securities	—		2,379		2,379		—		3,504		3,504
Corporate debt securities	—		43,056		43,056		—		6,013		6,013
U.S. treasury securities	239,277		—		239,277		176,184		—		176,184
Agency bonds	9,158		—		9,158		16,103		—		16,103

Commercial paper	—		4,954		4,954		—		15,826		15,826
Derivative instruments
Currency hedging contracts (1)	—		1,574		1,574		—		—		—
Total assets	$	298,711	$	51,963	$	350,674	$	216,429	$	25,343	$	241,772

Liabilities
Derivative instruments
Currency hedging contracts (1)	$	—	$	478	$	478	$	—	$	9,480	$	9,480

Revenue (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenues

Our disaggregated revenues were as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Royalties	$	120,593	$	99,640

Product sales, net
Proprietary product sales	35,254		27,961
Bulk rHuPH20 sales	10,511		22,069
Device partnered product sales	12,818		10,764
Total product sales, net	58,583		60,794

Revenues under collaborative agreements

Event-based development and regulatory milestones and other fees	14,000		—

Device licensing and development revenue	2,703		1,709
Total revenues under collaborative agreements	16,703		1,709

Total revenues	$	195,879	$	162,143

Schedule of accounts receivable, deferred revenues from contracts with customers, and amounts under collaborative agreements included in transaction price

Accounts receivable, other contract assets and deferred revenues (contract liabilities) from contracts with customers, including partners, consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Accounts receivable, net	$	185,313	$	233,254
Other contract assets	10,589		956
Deferred revenues	4,595		4,048

Certain Balance Sheet Items (Tables)

3 Months Ended

Mar. 31, 2024

Balance Sheet Related Disclosures [Abstract]

Schedule of accounts receivable

Accounts receivable, net and contract assets consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Accounts receivable from product sales to partners	$	27,045	$	58,588
Accounts receivable from revenues under collaborative agreements	2,078		16,183
Accounts receivable from royalty payments	115,413		118,170
Accounts receivable from other product sales	46,986		47,060

Contract assets	10,589		956
Total accounts receivable and contract assets	202,111		240,957
Allowance for distribution fees and discounts	(6,209)		(6,747)
Total accounts receivable, net and contract assets	$	195,902	$	234,210

Schedule of inventories

Inventories, consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Raw materials	$	29,112	$	23,646
Work-in-process	43,611		34,025
Finished goods	95,818		69,930
Total inventories, net	$	168,541	$	127,601

Schedule of prepaid expenses and other assets

Prepaid expenses and other assets consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Prepaid manufacturing expenses	$	36,211	$	36,850

Other prepaid expenses	13,847		12,902
Other assets	12,951		16,677
Total prepaid expenses and other assets	63,009		66,429
Less: Long-term portion	(17,319)		(17,816)
Total prepaid expenses and other assets, current	$	45,690	$	48,613

Schedule of property and equipment, net

Property and equipment, net consisted of the following (in thousands):


	March 31, 2024		December 31, 2023
Research equipment	$	8,690	$	8,588
Manufacturing equipment	36,364		32,472
Computer and office equipment	10,888		9,722
Leasehold improvements	7,124		6,987
Subtotal	63,066		57,769
Accumulated depreciation and amortization	(21,180)		(19,661)
Subtotal	41,886		38,108
Right of use of assets	36,185		36,836
Property and equipment, net	$	78,071	$	74,944

Schedule of accrued expenses

Accrued expenses consisted of the following (in thousands):


	March 31, 2024		December 31, 2023

Accrued compensation and payroll taxes	$	10,442	$	17,361
Accrued outsourced manufacturing expenses	27,456		12,361
Income taxes payable	19,074		963
Product returns and sales allowance	39,941		41,932
Other accrued expenses	20,839		33,584
Lease liability	31,763		32,197
Total accrued expenses	149,515		138,398
Less long-term portion	(31,201)		(37,720)
Total accrued expenses, current	$	118,314	$	100,678

Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

A summary of the activity impacting goodwill is presented below (in thousands):


Balance as of December 31, 2023	$	416,821
Adjustment	—
Balance as of March 31, 2024	$	416,821

Schedule of Finite-Lived Intangible Assets

The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of March 31, 2024 (in thousands).


	Weighted Average Useful Life (in years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Auto Injector technology platform	7	$	402,000	$	106,521	$	295,479
XYOSTED proprietary product	10	136,200		25,263		110,937

Total finite-lived intangibles, net		$	538,200	$	131,784	$	406,416
ATRS-1902 (IPR&D)	Indefinite					48,700
Total intangibles, net						$	455,116

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense


Year	Amortization Expense
Remainder of 2024	$	53,286
2025	71,049
2026	71,049
2027	71,049
2028	71,049
Thereafter	68,934
Total	$	406,416

Long-Term Debt, Net (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

Net Carrying Amounts of our Convertible Notes

The carrying amount and fair value of our Convertible Notes were as follows (in thousands).


	March 31, 2024		December 31, 2023
Principal amount

2027 Convertible Notes	$	805,000	$	805,000
2028 Convertible Notes	720,000		720,000
Total principal amount	$	1,525,000	$	1,525,000

Unamortized debt discount

2027 Convertible Notes	$	(10,094)	$	(10,950)
2028 Convertible Notes	(14,027)		(14,802)
Total unamortized debt discount	$	(24,121)	$	(25,752)

Carrying amount

2027 Convertible Notes	$	794,906	$	794,050
2028 Convertible Notes	705,973		705,198
Total carrying amount	$	1,500,879	$	1,499,248

Fair value based on trading levels (Level 2):

2027 Convertible Notes	$	714,244	$	695,826
2028 Convertible Notes	702,403		670,522
Total fair value of outstanding notes	$	1,416,647	$	1,366,348

Remaining amortization per period of debt discount (in years):

2027 Convertible Notes	2.9		3.2
2028 Convertible Notes	4.4		4.6

Interest Income and Interest Expense Disclosure

The following table summarizes the components of interest expense and the effective interest rates for each of our Convertible Notes (in thousands).


	Three Months Ended March 31,
	2024			2023
Coupon interest
2024 Convertible Notes	$	—		$	36
2027 Convertible Notes	503			503
2028 Convertible Notes	1,800			1,800
Total coupon interest	$	2,303		$	2,339

Amortization of debt discount
2024 Convertible Notes	$	—		$	24
2027 Convertible Notes	856			850
2028 Convertible Notes	775			764
Total amortization of debt discount	$	1,631		$	1,638

Interest expense
2024 Convertible Notes	$	—		$	60
2027 Convertible Notes	1,359			1,353
2028 Convertible Notes	2,575			2,564
Total interest expense	$	3,934		$	3,977

Effective interest rates

2027 Convertible Notes	0.7		%	0.7		%
2028 Convertible Notes	1.5		%	1.5		%

Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of share-based compensation expense

The following table summarized share-based compensation expense included in our condensed consolidated statements of income related to share-based awards (in thousands):


	Three Months Ended March 31,
	2024		2023
Research and development	$	3,345	$	3,101
Selling, general and administrative	6,529		4,865
Total share-based compensation expense	$	9,874	$	7,966

Schedule of share-based compensation expense by type

Share-based compensation expense by type of share-based award was as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Stock options	$	4,299	$	3,455
RSUs, PSUs and ESPP	5,575		4,511
Total share-based compensation expense	$	9,874	$	7,966

Schedule of assumptions used in Black-Scholes model

The assumptions used in the Black-Scholes Model were as follows:


	Three Months Ended March 31,
	2024	2023
Expected volatility	40.02 - 40.08%	39.68 - 39.98%
Average expected term (in years)	5.0	4.8
Risk-free interest rate	3.80 - 4.28%	3.48 - 4.27%
Expected dividend yield	—	—

Schedule of unrecognized estimated compensation cost by type


	March 31, 2024
	Unrecognized Expense		Remaining Weighted-Average Recognition Period (in years)
Stock options	$	42,038	2.70

RSUs	56,513		3.05
PSUs	11,543		2.30
ESPP	118		0.21

Earnings per share (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Schedule of reconciliation of numerators and denominators of basic and diluted computations

A reconciliation of the numerators and the denominators of the basic and diluted earnings per share computations is as follows (in thousands, except per share amounts):


	Three Months Ended March 31,
	2024		2023
Numerator
Net income	$	76,823	$	39,615
Denominator
Weighted average common shares outstanding for basic earnings per share	126,941		135,027
Dilutive potential common stock outstanding
Stock options	1,607		2,173
RSUs, PSUs and ESPP	339		468
Convertible Notes	—		232
Weighted average common shares outstanding for diluted earnings per share	128,887		137,900
Earnings per share
Basic	$	0.61	$	0.29
Diluted	$	0.60	$	0.29

Antidilutive securities excluded from calculation of diluted earnings per common share

Shares which have been excluded from the calculation of diluted earnings per common share because their effect was anti-dilutive include the following (shares in millions):


	Three Months Ended March 31,
	2024	2023
Anti-dilutive securities (1)	28.2	26.2

(1) The anti-dilutive securities include outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and Convertible Notes

Organization and Business (Details)	3 Months Ended
Organization and Business (Details)	Mar. 31, 2024 product
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalties received, number of products sold	7
Takeda
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalties received, number of products sold	1
Janssen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalties received, number of products sold	1
Argenx
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalties received, number of products sold	1
Roche
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalties received, number of products sold	4

Summary of Significant Accounting Policies -Accounts Receivable, net (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 0	$ 0

Summary of Significant Accounting Policies - Leases (Details)	Mar. 31, 2024
Minimum
Lessee, Lease, Description [Line Items]
Term of leases	3 years
Maximum
Lessee, Lease, Description [Line Items]
Term of leases	12 years

Summary of Significant Accounting Policies -Property and Equipment, net (Details)	Mar. 31, 2024
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years

Summary of Significant Accounting Policies - Cash Flow Hedges - Currency Risks (Details) - Cash Flow Hedging - Currency hedging contracts	3 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Derivative, contract term	4 years
Derivative [Line Items]
Derivative, contract term	4 years

Summary of Significant Accounting Policies - Revenue and Cost of Product Sales (Details)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Period of contract termination by written notice	90 days

Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accounting Policies [Abstract]
Income tax provision	$ 19,205	$ 12,623
Effective income tax rate, percent	20.00%

Summary of Significant Accounting Policies - Segment Information (Details)	3 Months Ended
	Mar. 31, 2024 segment
Accounting Policies [Abstract]
Number of operating segments	1

Fair Value Measurement - Components of Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities
Amortized Cost	$ 298,983	$ 217,475
Gross Unrealized Gains	38	201
Gross Unrealized Losses	(197)	(46)
Estimated Fair Value	298,824	217,630
Asset-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	2,384	3,512
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5)	(8)
Estimated Fair Value	2,379	3,504
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	43,118	6,022
Gross Unrealized Gains	2	1
Gross Unrealized Losses	(64)	(10)
Estimated Fair Value	43,056	6,013
U.S. treasury securities
Schedule of Available-for-sale Securities
Amortized Cost	239,347	175,996
Gross Unrealized Gains	36	200
Gross Unrealized Losses	(106)	(12)
Estimated Fair Value	239,277	176,184
Agency bonds
Schedule of Available-for-sale Securities
Amortized Cost	9,180	16,119
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(22)	(16)
Estimated Fair Value	9,158	16,103
Commercial paper
Schedule of Available-for-sale Securities
Amortized Cost	4,954	15,826
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 4,954	$ 15,826

Fair Value Measurement - Narrative (Details)	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of loss positions \| security	33
Fair market value of gross unrealized loss position	$ 215,500,000
Unrealized loss position of debt securities	197,000	$ 46,000
Credit loss	0
Available-for-sale marketable securities	298,824,000	217,630,000
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale marketable securities	$ 0	$ 0

Fair Value Measurement - Contractual Maturities of Available-for-sale Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Due within one year	$ 235,059	$ 197,633
Due after one year but within five years	63,765	19,997
Total estimated fair value of contractual maturities, available-for-sale	$ 298,824	$ 217,630

Fair Value Measurement - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Available-for-sale marketable securities	$ 298,824	$ 217,630
Total assets	350,674	241,772
Liabilities
Derivative asset, current	1,300
Derivative asset, noncurrent	300
Derivative liability, noncurrent	$ 500
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total prepaid expenses and other assets, current
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total accrued expenses, current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities
Currency hedging contracts
Assets
Derivative instruments	$ 1,574	0
Liabilities
Derivative instruments	478	9,480
Asset-backed securities
Assets
Available-for-sale marketable securities	2,379	3,504
Corporate debt securities
Assets
Available-for-sale marketable securities	43,056	6,013
U.S. treasury securities
Assets
Available-for-sale marketable securities	239,277	176,184
Agency bonds
Assets
Available-for-sale marketable securities	9,158	16,103
Commercial paper
Assets
Available-for-sale marketable securities	4,954	15,826
Money market funds
Assets
Cash equivalents	20,276	22,142
U.S. treasury securities
Assets
Cash equivalents	30,000	2,000
Level 1
Assets
Total assets	298,711	216,429
Level 1 \| Currency hedging contracts
Assets
Derivative instruments	0	0
Liabilities
Derivative instruments	0	0
Level 1 \| Asset-backed securities
Assets
Available-for-sale marketable securities	0	0
Level 1 \| Corporate debt securities
Assets
Available-for-sale marketable securities	0	0
Level 1 \| U.S. treasury securities
Assets
Available-for-sale marketable securities	239,277	176,184
Level 1 \| Agency bonds
Assets
Available-for-sale marketable securities	9,158	16,103
Level 1 \| Commercial paper
Assets
Available-for-sale marketable securities	0	0
Level 1 \| Money market funds
Assets
Cash equivalents	20,276	22,142
Level 1 \| U.S. treasury securities
Assets
Cash equivalents	30,000	2,000
Level 2
Assets
Total assets	51,963	25,343
Level 2 \| Currency hedging contracts
Assets
Derivative instruments	1,574	0
Liabilities
Derivative instruments	478	9,480
Level 2 \| Asset-backed securities
Assets
Available-for-sale marketable securities	2,379	3,504
Level 2 \| Corporate debt securities
Assets
Available-for-sale marketable securities	43,056	6,013
Level 2 \| U.S. treasury securities
Assets
Available-for-sale marketable securities	0	0
Level 2 \| Agency bonds
Assets
Available-for-sale marketable securities	0	0
Level 2 \| Commercial paper
Assets
Available-for-sale marketable securities	4,954	15,826
Level 2 \| Money market funds
Assets
Cash equivalents	0	0
Level 2 \| U.S. treasury securities
Assets
Cash equivalents	$ 0	$ 0

Revenue - Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 195,879	$ 162,143
Royalties
Disaggregation of Revenue [Line Items]
Total revenues	120,593	99,640
Product sales, net
Disaggregation of Revenue [Line Items]
Total revenues	58,583	60,794
Proprietary product sales
Disaggregation of Revenue [Line Items]
Total revenues	35,254	27,961
Bulk rHuPH20 sales
Disaggregation of Revenue [Line Items]
Total revenues	10,511	22,069
Device partnered product sales
Disaggregation of Revenue [Line Items]
Total revenues	12,818	10,764
Collaborative Agreements
Disaggregation of Revenue [Line Items]
Total revenues	16,703	1,709
Event-based development and regulatory milestones and other fees
Disaggregation of Revenue [Line Items]
Total revenues	14,000	0
Device licensing and development revenue
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,703	$ 1,709

Revenue - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Revenue - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue recognized variable consideration and other uncertainties satisfied	$ 14,000
Revenue recognized previously included in deferred revenue	100
Deferred revenues	4,595	$ 4,048
Contract assets	10,589	$ 956
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 1,200
Deferred revenue, remaining performance obligation, expected timing	12 months
Other collaborators
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 77,300
License Fees and Event-Based
Disaggregation of Revenue [Line Items]
Revenue recognized from prior periods	134,600
Product
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligations, related to unfulfilled product purchase orders	$ 72,700

Revenue - Accounts Receivable, Other Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 185,313	$ 233,254
Contract assets	10,589	956
Deferred revenues	$ 4,595	$ 4,048

Certain Balance Sheet Items - Accounts Receivable, net (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract assets	$ 10,589	$ 956
Total accounts receivable and contract assets	202,111	240,957
Allowance for distribution fees and discounts	(6,209)	(6,747)
Total accounts receivable, net and contract assets	195,902	234,210
Device partnered product sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	27,045	58,588
Revenues under collaborative agreements
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	2,078	16,183
Royalties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	115,413	118,170
Other product sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 46,986	$ 47,060

Certain Balance Sheet Items - Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 29,112	$ 23,646
Work-in-process	43,611	34,025
Finished goods	95,818	69,930
Total inventories, net	$ 168,541	$ 127,601

Certain Balance Sheet Items - Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Prepaid manufacturing expenses	$ 36,211	$ 36,850
Other prepaid expenses	13,847	12,902
Other assets	12,951	16,677
Total prepaid expenses and other assets	63,009	66,429
Less: Long-term portion	(17,319)	(17,816)
Total prepaid expenses and other assets, current	$ 45,690	$ 48,613

Certain Balance Sheet Items - Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 63,066		$ 57,769
Accumulated depreciation and amortization	(21,180)		(19,661)
Subtotal	41,886		38,108
Right of use of assets	36,185		36,836
Property and equipment, net	78,071		74,944
Depreciation and amortization	2,443	$ 2,622
Right-of-use asset amortization	1,400	$ 1,400
Research equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,690		8,588
Manufacturing equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	36,364		32,472
Computer and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,888		9,722
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 7,124		$ 6,987

Certain Balance Sheet Items - Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Accrued compensation and payroll taxes	$ 10,442		$ 17,361
Accrued outsourced manufacturing expenses	27,456		12,361
Income taxes payable	19,074		963
Product returns and sales allowance	39,941		41,932
Other accrued expenses	20,839		33,584
Lease liability	31,763		32,197
Total accrued expenses	149,515		138,398
Less long-term portion	(31,201)		(37,720)
Total accrued expenses, current	118,314		$ 100,678
Expense associated with accretion of lease liabilities	600	$ 700
Total operating lease cost	2,000	2,100
Cash paid for amounts related to leases	$ 1,800	$ 1,700

Goodwill and Intangible Assets - Goodwill Rollforward (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 416,821
Measurement period adjustment	0
Goodwill, Ending Balance	$ 416,821

Goodwill and Intangible Assets - Additional (Details)	3 Months Ended
Goodwill and Intangible Assets - Additional (Details)	Mar. 31, 2024
Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted average useful life (in years)	7 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted average useful life (in years)	10 years

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 538,200
Accumulated Amortization	131,784
Net Carrying Value	406,416
ATRS-1902 (IPR&D)	48,700
Total intangibles, net	$ 455,116	$ 472,879
Auto Injector technology platform
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	7 years
Gross Carrying Value	$ 402,000
Accumulated Amortization	106,521
Net Carrying Value	$ 295,479
XYOSTED proprietary product
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	10 years
Gross Carrying Value	$ 136,200
Accumulated Amortization	25,263
Net Carrying Value	$ 110,937

Goodwill and Intangible Assets - Future Amortization (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2024	$ 53,286
2025	71,049
2026	71,049
2027	71,049
2028	71,049
Thereafter	68,934
Total	$ 406,416

Long-Term Debt, Net - Narrative (Details)	1 Months Ended
Long-Term Debt, Net - Narrative (Details)	Mar. 31, 2023 USD ($) shares	Aug. 31, 2022 USD ($) trading_day businessDay $ / shares	May 31, 2022 USD ($)	Mar. 31, 2021 USD ($) trading_day businessDay $ / shares	Jan. 31, 2021 $ / shares	Nov. 30, 2019 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Aug. 15, 2022 $ / shares
Debt Instrument [Line Items]
Aggregate principal							$ 1,525,000,000	$ 1,525,000,000
Conversion of debt, principal	$ 13,500,000
Stock issued for conversion of debt instrument (shares) \| shares	288,886
1.00% Convertible Senior Notes due 2028
Debt Instrument [Line Items]
Aggregate principal							720,000,000	720,000,000
Cap call transaction, cap price per share (in usd per share) \| $ / shares		$ 75.4075
Sale of stock premium over last reported sale price, percentage		75.00%
Sale of stock, price per share (in usd per share) \| $ / shares									$ 43.09
Payment for capped calls		$ 69,100,000
1.00% Convertible Senior Notes due 2028 \| Convertible Debt
Debt Instrument [Line Items]
Interest rate, stated percentage		1.00%
Aggregate principal		$ 720,000,000
Lenders fee		18,000,000
Proceeds from issuance of 2028 Convertible Notes		702,000,000
Payment of debt issuance cost		$ 1,000,000
Debt, convertible, conversion ratio		17.8517
Debt, convertible, conversion price (in usd per share) \| $ / shares		$ 56.02
1.00% Convertible Senior Notes due 2028 \| Convertible Debt \| Period One
Debt Instrument [Line Items]
Convertible, threshold percentage of stock price trigger		130.00%
Convertible, threshold trading days \| trading_day		20
Convertible, threshold consecutive trading days \| trading_day		30
1.00% Convertible Senior Notes due 2028 \| Convertible Debt \| Period Two
Debt Instrument [Line Items]
Convertible, threshold percentage of stock price trigger		98.00%
Convertible, threshold consecutive trading days \| trading_day		5
Convertible, threshold consecutive business days \| businessDay		5
0.25% Convertible Senior Notes due 2027
Debt Instrument [Line Items]
Aggregate principal							805,000,000	$ 805,000,000
Proceeds from issuance of 2028 Convertible Notes				$ 784,900,000
0.25% Convertible Senior Notes due 2027 \| Convertible Debt
Debt Instrument [Line Items]
Interest rate, stated percentage				0.25%
Aggregate principal				$ 805,000,000
Lenders fee				20,100,000
Payment of debt issuance cost				$ 400,000
Debt, convertible, conversion ratio				12.9576
Debt, convertible, conversion price (in usd per share) \| $ / shares				$ 77.17
0.25% Convertible Senior Notes due 2027 \| Convertible Debt \| Period One
Debt Instrument [Line Items]
Convertible, threshold percentage of stock price trigger				130.00%
Convertible, threshold trading days \| trading_day				20
Convertible, threshold consecutive trading days \| trading_day				30
0.25% Convertible Senior Notes due 2027 \| Convertible Debt \| Period Two
Debt Instrument [Line Items]
Convertible, threshold percentage of stock price trigger				98.00%
Convertible, threshold consecutive trading days \| trading_day				5
Convertible, threshold consecutive business days \| businessDay				5
2024 Convertible Notes
Debt Instrument [Line Items]
Proceeds from issuance of 2028 Convertible Notes						$ 447,300,000
2024 Convertible Notes \| Convertible Debt
Debt Instrument [Line Items]
Interest rate, stated percentage						1.25%
Aggregate principal						$ 460,000,000
Lenders fee						12,700,000
Payment of debt issuance cost						$ 300,000
Debt, convertible, conversion ratio					41.9208
Debt, convertible, conversion price (in usd per share) \| $ / shares					$ 23.85
Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 575,000,000
Debt issuance costs							3,600,000
Credit Agreement \| Minimum \| Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee percentage			0.15%
Credit Agreement \| Maximum \| Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee percentage			0.35%
Credit Agreement \| SOFR \| Revolving Credit Facility \| Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate			0.10%
Credit Agreement \| SOFR \| Minimum \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Credit Agreement \| SOFR \| Minimum \| Revolving Credit Facility \| Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate			1.25%
Credit Agreement \| SOFR \| Maximum \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			1.10%
Credit Agreement \| SOFR \| Maximum \| Revolving Credit Facility \| Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate			2.25%
Credit Agreement \| Fed Funds Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Credit Agreement \| Base Rate \| Minimum \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			0.25%
Credit Agreement \| Base Rate \| Maximum \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			1.25%
Credit Agreement \| Term Loan Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 250,000,000
Unamortized debt issuance cost							$ 2,100,000
Credit Agreement \| Term Loan Facility \| Year one
Debt Instrument [Line Items]
Interest rate, stated percentage			2.50%
Credit Agreement \| Term Loan Facility \| Year two
Debt Instrument [Line Items]
Interest rate, stated percentage			5.00%
Credit Agreement \| Term Loan Facility \| Year three
Debt Instrument [Line Items]
Interest rate, stated percentage			7.50%
Credit Agreement \| Term Loan Facility \| Year four
Debt Instrument [Line Items]
Interest rate, stated percentage			10.00%

Long-Term Debt, Net - Carrying Amount of Convertible Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total principal amount	$ 1,525,000	$ 1,525,000
Total unamortized debt discount	(24,121)	(25,752)
Long-term debt, excluding current maturities	1,500,879	1,499,248
Total carrying amount	1,500,879	1,499,248
Total fair value of outstanding notes	1,416,647	1,366,348
2027 Convertible Notes
Debt Instrument [Line Items]
Total principal amount	805,000	805,000
Total unamortized debt discount	(10,094)	(10,950)
Long-term debt, excluding current maturities	794,906	794,050
Total fair value of outstanding notes	$ 714,244	$ 695,826
Remaining amortization per period of debt discount (in years):	2 years 10 months 24 days	3 years 2 months 12 days
2028 Convertible Notes
Debt Instrument [Line Items]
Total principal amount	$ 720,000	$ 720,000
Total unamortized debt discount	(14,027)	(14,802)
Long-term debt, excluding current maturities	705,973	705,198
Total fair value of outstanding notes	$ 702,403	$ 670,522
Remaining amortization per period of debt discount (in years):	4 years 4 months 24 days	4 years 7 months 6 days

Long-Term Debt, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Instrument [Line Items]
Total amortization of debt discount	$ 1,830	$ 1,835
Convertible Debt
Debt Instrument [Line Items]
Total coupon interest	2,303	2,339
Total amortization of debt discount	1,631	1,638
Total interest expense	3,934	3,977
2024 Convertible Notes \| Convertible Debt
Debt Instrument [Line Items]
Total coupon interest	0	36
Total amortization of debt discount	0	24
Total interest expense	0	60
2027 Convertible Notes \| Convertible Debt
Debt Instrument [Line Items]
Total coupon interest	503	503
Total amortization of debt discount	856	850
Total interest expense	$ 1,359	$ 1,353
Effective interest rates	0.70%	0.70%
2028 Convertible Notes \| Convertible Debt
Debt Instrument [Line Items]
Total coupon interest	$ 1,800	$ 1,800
Total amortization of debt discount	775	764
Total interest expense	$ 2,575	$ 2,564
Effective interest rates	1.50%	1.50%

Share-based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	$ 9,874	$ 7,966
Stock options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	4,299	3,455
RSUs, PSUs and ESPP
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	5,575	4,511
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	3,345	3,101
Selling, general and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	$ 6,529	$ 4,865

Share-based Compensation - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Feb. 28, 2021	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)		500,000	1,200,000
2021 ESPP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)		2,604,222
ESPP \| 2021 ESPP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP purchase price of common stock, percent of market price	85.00%
Minimum employee subscription rate	1.00%
Maximum employee subscription rate	15.00%
Maximum contribution amount	$ 25
Purchase period (in months)	6 months

Share-based Compensation - Assumptions Used in the Black-Scholes Model (Details)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Share-based Compensation Arrangements Valuation Inputs [Line Items]
Average expected term (in years)	5 years	4 years 9 months 18 days
Risk-free interest rate, minimum	3.80%	3.48%
Risk-free interest rate, maximum	4.28%	4.27%
Expected dividend yield	0.00%	0.00%
Minimum
Schedule of Share-based Compensation Arrangements Valuation Inputs [Line Items]
Expected volatility	40.02%	39.68%
Maximum
Schedule of Share-based Compensation Arrangements Valuation Inputs [Line Items]
Expected volatility	40.08%	39.98%

Share-based Compensation - Unrecognized Estimated Compensation Cost (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 42,038
Remaining Weighted-Average Recognition Period (in years)	2 years 8 months 12 days
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 56,513
Remaining Weighted-Average Recognition Period (in years)	3 years 18 days
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 11,543
Remaining Weighted-Average Recognition Period (in years)	2 years 3 months 18 days
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 118
Remaining Weighted-Average Recognition Period (in years)	2 months 15 days

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended		28 Months Ended
	Nov. 30, 2023	Dec. 31, 2021	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2024	Feb. 29, 2024	Dec. 31, 2023
Stockholders' equity (deficit) (textual)
Payments for tax withholding for restricted stock units vested, net			$ 489	$ 1,048
Capital return program, authorized amount (in shares)		$ 750,000				$ 750,000
Capital return program, purchase period		3 years
Stock repurchased (in shares)					4,500,000	3,900,000	12,600,000
Stock repurchased					$ 200,000	$ 150,000	$ 500,000
Weighted-average price paid per share (usd per share)					$ 44.44	$ 38.51	$ 39.81
ASR
Stockholders' equity (deficit) (textual)
Stock repurchased (in shares)	5,500,000
Stock repurchased	$ 250,000
ASR, payment to bank	$ 250,000
2024 Capital Return Program
Stockholders' equity (deficit) (textual)
Capital return program, authorized amount (in shares)								$ 750,000
Stock options
Stockholders' equity (deficit) (textual)
Number of shares of common stock issued as a result of stock option exercises (in shares)			154,556	143,931
Stock options weighted average exercise price (usd per share)			$ 17.47	$ 16.87
Net proceeds from stock options exercised			$ 2,700	$ 2,400
RSUs and PSUs
Stockholders' equity (deficit) (textual)
Stock issued during period, shares, restricted stock award, net of forfeitures (in shares)			262,195	239,919
Unit holders awards surrendered to pay for minimum withholding taxes (in shares)			88,825	70,733
Payments for tax withholding for restricted stock units vested, net			$ 6,000	$ 6,500
Stock options and restricted units
Stockholders' equity (deficit) (textual)
Outstanding stock options and restricted stock units (in shares)			8,700,000				8,700,000		7,800,000

Earnings per share - Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator
Net income	$ 76,823	$ 39,615
Denominator
Weighted average common shares outstanding for basic earnings per share (shares)	126,941	135,027
Dilutive potential common stock outstanding
Weighted average common shares outstanding for diluted earnings per share (shares)	128,887	137,900
Earnings per share
Basic (USD per share)	$ 0.61	$ 0.29
Diluted (USD per share)	$ 0.60	$ 0.29
Convertible Notes
Dilutive potential common stock outstanding
Dilutive potential common stock outstanding (shares)	0	232
Stock options
Dilutive potential common stock outstanding
Dilutive potential common stock outstanding (shares)	1,607	2,173
RSUs, PSUs and ESPP
Dilutive potential common stock outstanding
Dilutive potential common stock outstanding (shares)	339	468