GWH

ESS Tech, Inc.$0.83-0.05 (-5.20%)

Prev Close$0.87·MCap$15.0M·P/E—·Vol278.6K·Yield—

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Buys (12M)

$25.7K

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Sells (12M)

$35.8K

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Net Activity

Net Seller

$10.1K

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at ESS Tech, Inc. (GWH) has been mixed between buying and selling, with 1 insider purchase totaling $25.7K and 8 insider sales totaling $35.8K. The most recent insider transaction was by Buckley Drew P (director, officer: CEO), who purchased $25.7K worth of shares on Jun 8, 2026. ESS Tech, Inc. operates in the Industrials sector, within the Electrical Equipment & Parts industry, with a market cap of $15.0M.

GWH Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Jun 8, 2026	Buckley Drew P	director, officer: CEO	Buy	25,000	$1.03	$25.7K	25,000
May 26, 2026	Suhadolnik Kate Eileen	officer: Chief Financial Officer	Sell	3,657	$0.93	$3.4K	162,679
May 26, 2026	Goodman Kelly F.	officer: SEE REMARKS	Sell	5,233	$0.93	$4.8K	213,371
Feb 26, 2026	Goodman Kelly F.	officer: SEE REMARKS	Sell	2,269	$1.54	$3.5K	215,853
Feb 26, 2026	Suhadolnik Kate Eileen	officer: Chief Financial Officer	Sell	741	$1.54	$1.1K	164,414
Nov 20, 2025	Goodman Kelly F.	Interim CEO	Sell	4,513	$2.40	$10.8K	0
Nov 20, 2025	Suhadolnik Kate Eileen	Interim CFO	Sell	1,299	$2.40	$3.1K	0
Aug 20, 2025	Goodman Kelly F.	Interim CEO	Sell	4,326	$1.61	$7.0K	0
Aug 20, 2025	Suhadolnik Kate Eileen	Interim CFO	Sell	1,232	$1.61	$2.0K	0
May 20, 2025	Goodman Kelly F.	Interim CEO	Sell	2,164	$1.96	$4.2K	0
May 20, 2025	Rabb Anthony	Chief Financial Officer	Sell	2,741	$1.96	$5.4K	0
Feb 10, 2025	Goodman Kelly F.	Interim CEO	Sell	1,489	$4.81	$7.2K	0
May 20, 2023	Rabb Anthony	Chief Financial Officer	Sell	13,196	$11.46	$151.2K	0
May 17, 2023	NIGGLI MICHAEL R	Director	Buy	10,000	$0.81	$8.1K	613,821
May 16, 2023	Hossfeld Rich	Director	Buy	10,000	$0.81	$8.1K	10,000
May 16, 2023	Teamey Kyle	Director	Buy	4,000	$0.84	$3.4K	35,986
May 15, 2023	NIGGLI MICHAEL R	Director	Buy	20,000	$1.13	$22.6K	603,821
Mar 7, 2023	NIGGLI MICHAEL R	Director	Buy	5,000	$1.65	$8.3K	583,821
Mar 7, 2023	Teamey Kyle	Director	Buy	2,500	$1.61	$4.0K	31,986
Feb 23, 2023	Dresselhuys Eric P.	Chief Executive Officer	Sell	23,440	$2.04	$47.8K	1,344,080
Feb 23, 2023	Evans Craig E	President	Sell	5,536	$2.04	$11.3K	5,561,524
Dec 16, 2022	NIGGLI MICHAEL R	Director	Buy	19,100	$2.56	$48.9K	578,821
Nov 22, 2022	Dresselhuys Eric P.	Chief Executive Officer	Sell	14,339	$3.82	$54.8K	1,367,520
Nov 22, 2022	Evans Craig E	President	Sell	114,567	$3.74	$428.2K0.9% OS	5,591,617
Oct 20, 2022	Moftakhar Amir	Chief Financial Officer	Sell	4,193	$3.48	$14.6K	563,043
Oct 19, 2022	Dresselhuys Eric P.	Chief Executive Officer	Sell	90,684	$3.72	$337.3K0.7% OS	1,434,914
Oct 19, 2022	Evans Craig E	President	Sell	28,968	$3.72	$107.8K	5,625,277
Oct 19, 2022	Moftakhar Amir	Chief Financial Officer	Sell	16,720	$3.72	$62.2K	567,236
Oct 18, 2022	Moftakhar Amir	Chief Financial Officer	Sell	63,205	$4.03	$254.4K0.5% OS	583,956
Mar 3, 2022	NIGGLI MICHAEL R	Director	Buy	20,000	$5.01	$100.2K	530,235
Jan 25, 2022	Dresselhuys Eric P.	Chief Executive Officer	Sell	59,642	$6.05	$361.0K	869,170
Jan 25, 2022	Evans Craig E	President	Sell	1,342	$6.05	$8.1K	5,373,083

GWH Insider Buying Activity

The following table shows recent insider purchases of ESS Tech, Inc. (GWH) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Jun 8, 2026	Buckley Drew P	director, officer: CEO	Buy	25,000	$1.03	$25.7K	25,000
May 17, 2023	NIGGLI MICHAEL R	Director	Buy	10,000	$0.81	$8.1K	613,821
May 16, 2023	Hossfeld Rich	Director	Buy	10,000	$0.81	$8.1K	10,000
May 16, 2023	Teamey Kyle	Director	Buy	4,000	$0.84	$3.4K	35,986
May 15, 2023	NIGGLI MICHAEL R	Director	Buy	20,000	$1.13	$22.6K	603,821
Mar 7, 2023	NIGGLI MICHAEL R	Director	Buy	5,000	$1.65	$8.3K	583,821
Mar 7, 2023	Teamey Kyle	Director	Buy	2,500	$1.61	$4.0K	31,986
Dec 16, 2022	NIGGLI MICHAEL R	Director	Buy	19,100	$2.56	$48.9K	578,821
Mar 3, 2022	NIGGLI MICHAEL R	Director	Buy	20,000	$5.01	$100.2K	530,235

GWH Insider Selling Activity

The following table shows recent insider sales of ESS Tech, Inc. (GWH) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
May 26, 2026	Suhadolnik Kate Eileen	officer: Chief Financial Officer	Sell	3,657	$0.93	$3.4K	162,679
May 26, 2026	Goodman Kelly F.	officer: SEE REMARKS	Sell	5,233	$0.93	$4.8K	213,371
Feb 26, 2026	Goodman Kelly F.	officer: SEE REMARKS	Sell	2,269	$1.54	$3.5K	215,853
Feb 26, 2026	Suhadolnik Kate Eileen	officer: Chief Financial Officer	Sell	741	$1.54	$1.1K	164,414
Nov 20, 2025	Goodman Kelly F.	Interim CEO	Sell	4,513	$2.40	$10.8K	0
Nov 20, 2025	Suhadolnik Kate Eileen	Interim CFO	Sell	1,299	$2.40	$3.1K	0
Aug 20, 2025	Goodman Kelly F.	Interim CEO	Sell	4,326	$1.61	$7.0K	0
Aug 20, 2025	Suhadolnik Kate Eileen	Interim CFO	Sell	1,232	$1.61	$2.0K	0
May 20, 2025	Goodman Kelly F.	Interim CEO	Sell	2,164	$1.96	$4.2K	0
May 20, 2025	Rabb Anthony	Chief Financial Officer	Sell	2,741	$1.96	$5.4K	0
Feb 10, 2025	Goodman Kelly F.	Interim CEO	Sell	1,489	$4.81	$7.2K	0
May 20, 2023	Rabb Anthony	Chief Financial Officer	Sell	13,196	$11.46	$151.2K	0
Feb 23, 2023	Dresselhuys Eric P.	Chief Executive Officer	Sell	23,440	$2.04	$47.8K	1,344,080
Feb 23, 2023	Evans Craig E	President	Sell	5,536	$2.04	$11.3K	5,561,524
Nov 22, 2022	Dresselhuys Eric P.	Chief Executive Officer	Sell	14,339	$3.82	$54.8K	1,367,520
Nov 22, 2022	Evans Craig E	President	Sell	114,567	$3.74	$428.2K0.9% OS	5,591,617
Oct 20, 2022	Moftakhar Amir	Chief Financial Officer	Sell	4,193	$3.48	$14.6K	563,043
Oct 19, 2022	Dresselhuys Eric P.	Chief Executive Officer	Sell	90,684	$3.72	$337.3K0.7% OS	1,434,914
Oct 19, 2022	Evans Craig E	President	Sell	28,968	$3.72	$107.8K	5,625,277
Oct 19, 2022	Moftakhar Amir	Chief Financial Officer	Sell	16,720	$3.72	$62.2K	567,236
Oct 18, 2022	Moftakhar Amir	Chief Financial Officer	Sell	63,205	$4.03	$254.4K0.5% OS	583,956
Jan 25, 2022	Dresselhuys Eric P.	Chief Executive Officer	Sell	59,642	$6.05	$361.0K	869,170
Jan 25, 2022	Evans Craig E	President	Sell	1,342	$6.05	$8.1K	5,373,083