Anthony Rabb - 20 May 2023 Form 4 Insider Report for ESS Tech, Inc. (GWH)

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GWH	Common Stock	Tax liability	$1,800	-100	-0.12%	$18.00	82,729	20 May 2023	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$1,924	-106	-0.13%	$18.15	82,623	20 Aug 2023	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$75,430	-4,298	-5.2%	$17.55	78,325	20 Nov 2023	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$14,268	-1,044	-1.3%	$13.67	77,281	20 Feb 2024	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$22,915	-1,886	-2.4%	$12.15	75,395	20 May 2024	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$15,455	-1,886	-2.5%	$8.19	73,509	20 Aug 2024	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$9,842	-1,889	-2.6%	$5.21	71,620	20 Nov 2024	Direct	F1, F2
transaction	GWH	Common Stock	Tax liability	$9,557	-1,987	-2.8%	$4.81	69,633	20 Feb 2025	Direct	F1, F2
transaction	GWH	Common Stock	Award	$0	+42,500	+61%	$0.000000	112,133	13 Apr 2025	Direct	F2, F3

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

Id	Content
F1	The reported shares were withheld by the Issuer upon vesting of restricted stock units, or RSUs, to satisfy tax withholding obligations.
F2	A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock.
F3	The reported shares are represented by RSUs, which vest as to 1/16th of the RSUs on May 20, 2025 and 1/16th of the RSUs shall vest quarterly thereafter, subject to the Reporting Person remaining a Service Provider to the Issuer through each such vest date.