Insider Transactions Reported by 30 Insiders of ESS Tech, Inc.

Symbol: GWH, GWH-WT on NYSE
Location: Wilsonville, OR

Quick Takeaways

GWH - ESS Tech, Inc. has 30 insiders with reported activity on this page.
Net insider value flow over the last year: -$4,635.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: ; sell value: $4,635.
Net share flow: -3,010.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$4,635.

Buys

Shares: 0

Insiders: 0

Sells

$4,635

Shares: 3,010

Insiders: 2

Net

-$4,635

Shares: -3,010

Insiders: -2

Window (months)	Sell shares	Buy $	Sell $	Net $
0-3	3,010	$0	$4,635	-$4,635
3-6	0	$0	$0	$0
6-9	0	$0	$0	$0
9-12	0	$0	$0	$0

ESS Tech, Inc. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
SOFTBANK GROUP CORP.	Director, 10%+ Owner	$44,970,887			Mixed	09 Nov 2021
HONEYWELL INTERNATIONAL INC	10%+ Owner	$20,627,886			Mixed	21 Sep 2023
Craig E. Evans	President, Director	$10,533,477			Mixed	13 Mar 2023
ACON S2 Sponsor, L.L.C.	10%+ Owner	$7,629,880			Mixed	08 Oct 2021
Eric P. Dresselhuys	Chief Executive Officer, Director	$943,910			Filing P/S	18 Nov 2024
Amir Moftakhar	Chief Financial Officer	$699,010			Mixed	19 Oct 2022
Jigish Dhirajlal Trivedi	Coo	$464,750			Mixed	18 Aug 2025
Kelly F. Goodman	Officer title: Chief Strategy Officer and General Counsel	$332,413	-$3,494	-1%	Filing P/S	20 Feb 2026
Kate Eileen Suhadolnik	Chief Financial Officer	$253,197	-$1,141	-0.45%	Filing P/S	20 Feb 2026
Anthony Rabb	Chief Financial Officer	$214,408			Mixed	20 May 2025
Michael R. Niggli	Director	$116,256			Mixed	13 Oct 2025
Daryl C. Wilson	Director	$94,873			Mixed	01 Jun 2022
Claudia Gast	Director	$74,665			Mixed	01 Jun 2022
Jeff Bodner	Chief Accounting Officer	$68,669			Mixed	08 Feb 2022
Janie Goddard	Director	$62,540			Mixed	08 Oct 2021
Sarah Kirshbaum Levy	Director	$62,540			Mixed	08 Oct 2021
D. Shadrick Wilson	Director	$62,540			Mixed	08 Oct 2021
Raffi Garabedian	Director	$50,780			Mixed	13 Oct 2025
Alexi Wellman	Director	$49,774			Mixed	13 Oct 2025
Kyle Teamey	Director	$49,587			Mixed	13 Oct 2025
Sandeep Nijhawan	Director	$37,184			Mixed	13 Oct 2025
Rich Hossfeld	Director	$35,659			Mixed	13 Oct 2025
Harry Quarls	Director	$17,296			Mixed	13 Oct 2025
John A. Roush	Chief Financial Officer, Director				Mixed	08 Oct 2021
Jonathan J. Ginns	Director				Mixed	08 Oct 2021
Adam M. Kriger	Chief Executive Officer, Director				Mixed	08 Oct 2021
Daniel Jinich	Director				Mixed	08 Oct 2021
Shirley Speakman	Director				Mixed	08 Oct 2021
Breakthrough Energy Ventures, LLC	10%+ Owner				Mixed	09 Nov 2021
Drew P. Buckley	CEO, Director				Mixed	28 Jan 2026

Top shareholders of ESS Tech, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
SOFTBANK GROUP CORP.	3/4/5 13D/G 13F	Director, 10%+ Owner · SB Energy Global Holdings One Ltd. · Company	20% from 13D/G	35,953,699	$44,970,887	—	09 Nov 2021	3/4/5 13D/G 13F
HONEYWELL INTERNATIONAL INC	3/4/5	10%+ Owner	— class O/S missing	16,491,754	$20,627,886	—	21 Sep 2023	3/4/5
Craig E. Evans	3/4/5	President, Director	— class O/S missing	8,421,392	$10,533,477	—	13 Mar 2023	3/4/5
ACON S2 Sponsor, L.L.C.	3/4/5	10%+ Owner	— mixed-class rows	10,183,334 mixed-class rows	$7,629,880	—	08 Oct 2021	3/4/5
Alyeska Investment Group, L.P.	13D/G 13F	Company	7.1%	1,400,000	$2,632,000	$0	31 Dec 2025	13D/G 13F
Arosa Capital Management LP	13F	Company	4.8%	950,000	$1,786,000	—	31 Dec 2025	13F
Eric P. Dresselhuys	3/4/5	Chief Executive Officer, Director	— class O/S missing	180,580	$943,910	—	18 Nov 2024	3/4/5
VANGUARD GROUP INC	13F	Company	2.5%	485,919	$913,527	—	31 Dec 2025	13F
Amir Moftakhar	3/4/5	Chief Financial Officer	— class O/S missing	558,850	$699,010	—	19 Oct 2022	3/4/5
Jigish Dhirajlal Trivedi	3/4/5	COO	1.4%	275,000	$464,750	—	18 Aug 2025	3/4/5
Shay Capital LLC	13F	Company	0.92%	180,000	$338,400	—	31 Dec 2025	13F
Kelly F. Goodman	3/4/5	Officer title: Chief Strategy Officer and General Counsel	— mixed-class rows	353,353 mixed-class rows	$332,413	-$3,494	20 Feb 2026	3/4/5
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.7%	136,470	$256,585	—	31 Dec 2025	13F
Kate Eileen Suhadolnik	3/4/5	Chief Financial Officer	— mixed-class rows	301,914 mixed-class rows	$253,197	-$1,141	20 Feb 2026	3/4/5
Green Alpha Advisors, LLC	13F	Company	0.61%	118,683	$223,124	—	31 Dec 2025	13F
Anthony Rabb	3/4/5	Chief Financial Officer	0.56%	109,392	$214,408	—	20 May 2025	3/4/5
JANE STREET GROUP, LLC	13F	Company	0.56%	109,012	$204,943	—	31 Dec 2025	13F
Pathstone Holdings, LLC	13F	Company	0.45%	88,982	$167,286	—	31 Dec 2025	13F
GSA CAPITAL PARTNERS LLP	13F	Company	0.38%	74,724	$140,000	—	31 Dec 2025	13F
JPMORGAN CHASE & CO	13F	Company	0.38%	74,259	$139,607	—	31 Dec 2025	13F
Michael R. Niggli	3/4/5	Director	0.46%	90,825	$116,256	—	13 Oct 2025	3/4/5
FMR LLC	13F	Company	0.27%	52,486	$98,674	—	31 Dec 2025	13F
Daryl C. Wilson	3/4/5	Director	— class O/S missing	75,850	$94,873	—	01 Jun 2022	3/4/5
BlackRock, Inc.	13F	Company	0.26%	50,370	$94,696	—	31 Dec 2025	13F
XTX Topco Ltd	13F	Company	0.25%	49,609	$93,265	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	0.24%	46,975	$88,313	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.23%	44,717	$84,068	—	31 Dec 2025	13F
Claudia Gast	3/4/5	Director	— class O/S missing	59,694	$74,665	—	01 Jun 2022	3/4/5
Jeff Bodner	3/4/5	Chief Accounting Officer	— class O/S missing	54,900	$68,669	—	08 Feb 2022	3/4/5
D. Shadrick Wilson	3/4/5	Director	— class O/S missing	50,000	$62,540	—	08 Oct 2021	3/4/5
Janie Goddard	3/4/5	Director	— class O/S missing	50,000	$62,540	—	08 Oct 2021	3/4/5
Sarah Kirshbaum Levy	3/4/5	Director	— class O/S missing	50,000	$62,540	—	08 Oct 2021	3/4/5
Raffi Garabedian	3/4/5	Director	0.2%	39,672	$50,780	—	13 Oct 2025	3/4/5
Alexi Wellman	3/4/5	Director	0.2%	38,886	$49,774	—	13 Oct 2025	3/4/5
Kyle Teamey	3/4/5	Director	0.2%	38,740	$49,587	—	13 Oct 2025	3/4/5
Sandeep Nijhawan	3/4/5	Director	0.15%	29,050	$37,184	—	13 Oct 2025	3/4/5
Rich Hossfeld	3/4/5	Director	0.14%	27,859	$35,659	—	13 Oct 2025	3/4/5
Engineers Gate Manager LP	13F	Company	0.08%	16,498	$31,016	—	31 Dec 2025	13F
LPL Financial LLC	13F	Company	0.07%	14,237	$26,766	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.05%	10,588	$19,905	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.05%	10,111	$19,009	—	31 Dec 2025	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.05%	10,000	$18,800	—	31 Dec 2025	13F
PRIMORIS WEALTH ADVISORS, LLC	13F	Company	0.05%	10,000	$18,800	—	31 Dec 2025	13F
Harry Quarls	3/4/5	Director	0.07%	13,513	$17,296	—	13 Oct 2025	3/4/5
OSAIC HOLDINGS, INC.	13F	Company	0.03%	6,106	$11,478	—	31 Dec 2025	13F
Golden State Wealth Management, LLC	13F	Company	0.01%	2,707	$5,090	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.01%	2,703	$5,082	—	31 Dec 2025	13F
CWM, LLC	13F	Company	0.01%	2,672	$5,000	—	31 Dec 2025	13F
Tower Research Capital LLC (TRC)	13F	Company	0.01%	2,494	$4,689	—	31 Dec 2025	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.01%	2,443	$4,593	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for ESS Tech, Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Kate Eileen Suhadolnik	GWH	Common Stock	Sale	-0.45%	$1,141	$1.54	-741	164,414	20 Feb 2026	Direct
Kelly F. Goodman	GWH	Common Stock	Sale	-1.04%	$3,494	$1.54	-2,269	215,853	20 Feb 2026	Direct
Kate Eileen Suhadolnik	GWH	Common Stock	Award	497.2%			137,500	165,155	13 Feb 2026	Direct
Kate Eileen Suhadolnik	GWH	Stock Option (right to buy)	Award				137,500	137,500	13 Feb 2026	Direct
Kelly F. Goodman	GWH	Common Stock	Award	170.6%			137,500	218,122	13 Feb 2026	Direct
Kelly F. Goodman	GWH	Stock Option (right to buy)	Award				137,500	137,500	13 Feb 2026	Direct
Drew P. Buckley	GWH	Stock Option (right to buy)	Award				550,000	550,000	28 Jan 2026	Direct
Kate Eileen Suhadolnik	GWH	Common Stock	Tax liability	-4.49%			-1,299	27,655	20 Nov 2025	Direct
Kelly F. Goodman	GWH	Common Stock	Tax liability	-5.3%			-4,513	80,622	20 Nov 2025	Direct
Michael R. Niggli	GWH	Common Stock	Award	17.5%			13,513	90,825	13 Oct 2025	Direct
Alexi Wellman	GWH	Common Stock	Award	53.3%			13,513	38,886	13 Oct 2025	Direct
Harry Quarls	GWH	Common Stock	Award				13,513	13,513	13 Oct 2025	Direct
Sandeep Nijhawan	GWH	Common Stock	Award	87%			13,513	29,050	13 Oct 2025	Direct
Raffi Garabedian	GWH	Common Stock	Award	51.7%			13,513	39,672	13 Oct 2025	Direct
Rich Hossfeld	GWH	Common Stock	Award	94.2%			13,513	27,859	13 Oct 2025	Direct
Kyle Teamey	GWH	Common Stock	Award	53.6%			13,513	38,740	13 Oct 2025	Direct
Kate Eileen Suhadolnik	GWH	Common Stock	Tax liability	-4.08%			-1,232	28,954	20 Aug 2025	Direct
Kelly F. Goodman	GWH	Common Stock	Tax liability	-4.84%			-4,326	85,135	20 Aug 2025	Direct
Jigish Dhirajlal Trivedi	GWH	Common Stock	Award				275,000	275,000	18 Aug 2025	Direct
Kelly F. Goodman	GWH	Common Stock	Tax liability	-2.36%			-2,164	89,461	20 May 2025	Direct
Anthony Rabb	GWH	Common Stock	Tax liability	-2.44%			-2,741	109,392	20 May 2025	Direct
Anthony Rabb	GWH	Common Stock	Award	61%			42,500	112,133	13 Apr 2025	Direct
Kelly F. Goodman	GWH	Common Stock	Award	67.5%			36,930	91,625	13 Apr 2025	Direct

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