Kelly F. Goodman - 20 Feb 2026 Form 4 Insider Report for ESS Tech, Inc. (GWH)

Role: Officer title: Chief Strategy Officer and General Counsel
Signature: /s/ Kate Suhadolnik, by power of attorney
Issuer symbol: GWH
Transactions as of: 20 Feb 2026
Net transactions value: -$3,494
Form type: 4
Filing time: 26 Feb 2026, 21:44:48 UTC
Previous filing: 26 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Goodman Kelly F.	Officer title: Chief Strategy Officer and General Counsel	C/O ESS TECH, INC., 26440 SW PARKWAY AVE., BLDG. 83, WILSONVILLE	/s/ Kate Suhadolnik, by power of attorney	26 Feb 2026	0002056453

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GWH	Common Stock	Sale	$3,494	-2,269	-1%	$1.54	215,853	20 Feb 2026	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs").
F2	A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock.

Remarks:

Officer title: Chief Strategy Officer and General Counsel