ESS Tech, Inc. GWH NYSE

NYSE • Industrials • Electrical Equipment & Parts • US • USD

SharesGrow Score

42/100

2/7 Pass

SharesGrow Intrinsic Value

ESS Tech, Inc. (GWH) has 20 known insider and institutional holders on record. The largest holder is SOFTBANK GROUP CORP with 35,919,908 shares. Other notable holders include Breakthrough Energy Ventures, LLC and ACON S2 Management, LLC.

Over the last 12 months, insiders have made 32 transactions in GWH stock — 13 buys (valued at $1.32M) and 2 sells (valued at $4.64K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

GWH Insider Ownership

Top Holder

SOFTBANK GROUP CORP

35,919,908 shares

Buys (12 mo)

$1.32M value

Sells (12 mo)

$4.64K value

12-Month Transaction Activity

Buy 41%

Sell 6%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Softbank Group Corp	10 Percent Owner	35,919,908	2021-11-12	100%
2	Breakthrough Energy Ventures, Llc	10 Percent Owner	18,558,721	2021-11-12	52%
3	Acon S2 Management, Llc	10 Percent Owner	6,100,000	2020-11-17	17%
4	Evans Craig E	President	2,859,868	2023-03-14	8%
5	Moftakhar Amir	Chief Financial Officer	558,850	2022-10-20	2%
6	Buckley Drew P	CEO	550,000	2026-01-29	2%
7	Trivedi Jigish Dhirajlal	COO	275,000	2025-09-05	1%
8	Dresselhuys Eric P.	Chief Executive Officer	180,580	2024-11-18	1%
9	Goodman Kelly F.	See Remarks	137,500	2026-02-26	0%
10	Suhadolnik Kate Eileen	Chief Financial Officer	137,500	2026-02-26	0%
11	Rabb Anthony	Chief Financial Officer	109,392	2025-05-22	0%
12	Niggli Michael R	Director	90,825	2025-10-15	0%
13	Wilson Daryl C	Director	75,850	2022-06-03	0%
14	Gast Claudia	Director	59,694	2022-06-03	0%
15	Bodner Jeff	Chief Accounting Officer	54,900	2022-02-09	0%
16	Garabedian Raffi	Director	39,672	2025-10-15	0%
17	Wellman Alexi	Director	38,886	2025-10-15	0%
18	Teamey Kyle	Director	38,740	2025-10-15	0%
19	Nijhawan Sandeep	Director	29,050	2025-10-15	0%
20	Hossfeld Rich	Director	27,859	2025-10-15	0%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-02-20	Suhadolnik Kate Eileen	Chief Financial Officer	Informative Sell	741	$1.54	$1.14K
2026-02-13	Suhadolnik Kate Eileen	Chief Financial Officer	RSU Award	137,500	$1.44	$198K
2026-02-20	Goodman Kelly F.	See Remarks	Informative Sell	2,269	$1.54	$3.49K
2026-02-13	Goodman Kelly F.	See Remarks	RSU Award	137,500	$1.44	$198K
2026-01-28	Buckley Drew P	CEO	RSU Award	550,000	$1.68	$924K
2026-01-01	Buckley Drew P	CEO	Unknown	50,000	$2.00	$100K
2025-11-20	Suhadolnik Kate Eileen	Interim CFO	Tax Withholding of RSU	1,299	$2.40	$3.12K
2025-11-20	Goodman Kelly F.	Interim CEO	Tax Withholding of RSU	4,513	$2.40	$10.83K
2025-10-13	Hossfeld Rich	Director	RSU Award	13,513	-	-
2025-10-13	Teamey Kyle	Director	RSU Award	13,513	-	-
2025-10-13	Wellman Alexi	Director	RSU Award	13,513	-	-
2025-10-13	Quarls Harry	Director	RSU Award	13,513	-	-
2025-10-13	Garabedian Raffi	Director	RSU Award	13,513	-	-
2025-10-13	Nijhawan Sandeep	Director	RSU Award	13,513	-	-
2025-10-13	Niggli Michael R	Director	RSU Award	13,513	-	-
2025-08-18	Trivedi Jigish Dhirajlal	COO	RSU Award	275,000	-	-
2025-08-20	Suhadolnik Kate Eileen	Interim CFO	Tax Withholding of RSU	1,232	$1.61	$1.98K
2025-08-01	Suhadolnik Kate Eileen	Interim CFO	Unknown	-	-	-
2025-08-18	Trivedi Jigish Dhirajlal	Officer	Unknown	-	-	-
2025-08-20	Goodman Kelly F.	Interim CEO	Tax Withholding of RSU	4,326	$1.61	$6.96K
2025-05-20	Goodman Kelly F.	Interim CEO	Tax Withholding of RSU	2,164	$1.96	$4.24K
2025-05-20	Rabb Anthony	Chief Financial Officer	Tax Withholding of RSU	2,741	$1.96	$5.37K
2025-04-13	Goodman Kelly F.	Interim CEO	RSU Award	36,930	-	-
2025-04-13	Rabb Anthony	Chief Financial Officer	RSU Award	42,500	-	-
2025-02-20	Rabb Anthony	Chief Financial Officer	Tax Withholding of RSU	1,987	$4.81	$9.56K