FORM 4
☐ Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
 OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response... 0.5
                      
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

NIGGLI MICHAEL R		 2. Issuer Name and Ticker or Trading Symbol

ESS Tech, Inc. [ GWH ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

C/O ESS TECH, INC., 26440 SW PARKWAY AVE., BLDG. 83		 3. Date of Earliest Transaction (MM/DD/YYYY)

5/19/2023
(Street)

WILSONVILLE, OR 97070		 4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)        (State)        (Zip)
Rule 10b5-1(c) Transaction Indication
☐ Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 5/19/2023  A  V 135373 (1)A$0 749194 D  
Common Stock         85228 I See footnote (2)
Common Stock         85228 I See footnote (3)
Common Stock         85228 I See footnote (4)
Common Stock         568312 I See footnote (5)
Common Stock         227407 I See footnote (6)
Common Stock         85228 I See footnote (7)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)		8. Price of Derivative Security
(Instr. 5)		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
(1) The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) May 19, 2024 or (ii) the day prior to the Issuer's next annual meeting of stockholders.
(2) The shares are held of record by the Chloe D. Niggli Gift Trust for which the reporting person serves as trustee.
(3) The shares are held of record by the Michael R. Niggli Jr. 2021 Gift Trust for which the reporting person serves as trustee.
(4) The shares are held of record by the Lorelei A. Niggli 2021 Gift Trust for which the reporting person serves as trustee.
(5) The shares are held of record by the Linda Naviaux Niggli Trust for which the reporting person's spouse serves as trustee.
(6) The shares are held of record by the Michael R. Niggli Family Trust for which the reporting person serves as trustee.
(7) The shares are held of record by the Ian M. Niggli 2021 Gift Trust for which the reporting person serves as trustee.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
NIGGLI MICHAEL R
C/O ESS TECH, INC.
26440 SW PARKWAY AVE., BLDG. 83
WILSONVILLE, OR 97070		X
Signatures
/s/ Kelly F. Goodman, by power of attorney5/19/2023
**Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
ACON S2 Acquisition (NASDAQ:STWO)
Historical Stock Chart
From Dec 2024 to Jan 2025 Click Here for more ACON S2 Acquisition Charts.
ACON S2 Acquisition (NASDAQ:STWO)
Historical Stock Chart
From Jan 2024 to Jan 2025 Click Here for more ACON S2 Acquisition Charts.