ESS Tech Ownership | Who Owns ESS Tech?

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ESS Tech Ownership Summary

ESS Tech is owned by 8.47% institutional investors, 11.39% insiders, and 80.15% retail investors. Softbank group is the largest institutional shareholder, holding 16.42% of GWH shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 1.30% of its assets in ESS Tech shares.

GWH Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	ESS Tech	8.47%	11.39%	80.15%
Sector	Industrials Stocks	48.69%	15.99%	35.32%
Industry	Electrical Equipment Stocks	34.19%	16.22%	49.59%
Idea	Energy Storage Stocks List	30.09%	17.59%	52.32%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Softbank group	2.40M	16.42%	$2.80M
Alyeska investment group	1.40M	9.59%	$1.64M
Heights capital management	963.50K	6.60%	$1.13M
Arosa capital management lp	910.00K	6.23%	$1.06M
Vanguard group	485.92K	3.43%	$913.53K
Geode capital management	223.56K	1.53%	$261.58K
Shay capital	180.00K	1.23%	$210.60K
Ubs group	149.28K	1.02%	$174.66K
Gsa capital partners llp	145.58K	1.00%	$170.00K
Green alpha advisors	114.58K	0.78%	$134.06K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Heights capital management	963.50K	0.31%	$1.13M
Arosa capital management lp	910.00K	0.16%	$1.06M
Green alpha advisors	114.58K	0.13%	$134.06K
Softbank group	2.40M	0.02%	$2.80M
Shay capital	180.00K	0.02%	$210.60K
Primoris wealth advisors	16.50K	0.01%	$19.30K
Gsa capital partners llp	145.58K	0.01%	$170.00K
Resurgent financial advisors	15.61K	0.01%	$18.26K
Alyeska investment group	1.40M	0.00%	$1.64M
Two sigma securities	16.59K	0.00%	$19.41K

Top Buyers

Holder	Shares	% Assets	Change
Heights capital management	963.50K	0.31%	963.50K
Goldman sachs group	636.48K	0.00%	475.90K
Vanguard group	485.92K	-	221.59K
Ubs group	149.28K	-	104.56K
Aqr capital management	102.26K	0.00%	102.26K

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	835.49K	-	-4.80M
Baird financial group	-	-	-367.52K
Nuveen asset management	-	-	-276.60K
Bank of new york mellon	-	-	-259.81K
Y-intercept (hong kong)	-	-	-208.46K

New Positions

Holder	Shares	% Assets	Change	Value
Heights capital management	963.50K	0.31%	963.50K	$1.13M
Aqr capital management	102.26K	0.00%	102.26K	$83.64K
Vanguard fiduciary trust	69.40K	-	69.40K	$81.20K
Russell investments group	22.87K	-	22.87K	$18.70K
Virtu financial	18.68K	0.00%	18.68K	$22.00K

Sold Out

Holder	Change
Newsquare capital	-5.00
Corecap advisors	-6.00
Groupe la francaise	-6.00
Financial gravity asset management	-12.00
Navalign	-13.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	20	-62.26%	1,236,615	-80.54%	8	0.42%	8	-75.76%	4	-20.00%
Dec 31, 2025	34	-22.73%	1,266,912	-66.17%	8	0.96%	21	-	4	33.33%
Sep 30, 2025	41	-8.89%	3,696,844	22.61%	30	4.80%	20	33.33%	3	-62.50%
Jun 30, 2025	46	4.55%	3,022,717	-10.23%	25	3.21%	16	220.00%	8	-38.46%
Mar 31, 2025	44	-20.00%	3,381,421	-2.76%	28	3.24%	7	-70.83%	12	20.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	363.18K	1.30%	-
Vanguard Institutional Extnd Mkt Idx Tr	271.54K	0.97%	-
Fidelity Extended Market Index	129.52K	0.46%	57.07K
Abante Quant Value FI	78.82K	0.28%	-
Fidelity Select Technology	52.48K	0.19%	-
NT R2000 Value Index Fund - NL	279.54K	0.16%	5.86K
NT R2000 Index Fund - NL	224.52K	0.13%	-9.51K
Fidelity Series Total Market Index	30.10K	0.11%	6.73K
Spartan Extended Market Index Pool F	29.15K	0.10%	23.12K
Northern Trust Russell 2000 Value Index	184.53K	0.10%	4.69K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 04, 2026	Buckley Drew P	CEO	Buy	$25.66K
May 21, 2026	Suhadolnik Kate Eileen	Chief Financial Officer	Sell	$1.59K
May 22, 2026	Suhadolnik Kate Eileen	Chief Financial Officer	Sell	$1.80K
May 21, 2026	Goodman Kelly F.	SEE REMARKS	Sell	$2.28K
May 22, 2026	Goodman Kelly F.	SEE REMARKS	Sell	$2.57K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	-
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	-	-
2025 Q1	-	-

GWH Ownership FAQ

Who Owns ESS Tech?

ESS Tech shareholders are primarily institutional investors at 8.47%, followed by 11.39% insiders and 80.14% retail investors. The average institutional ownership in ESS Tech's industry, Electrical Equipment Stocks, is 34.19%, which ESS Tech falls below.

Who owns the most shares of ESS Tech?

ESS Tech’s largest shareholders are Softbank group (2.4M shares, 16.42%), Alyeska investment group (1.4M shares, 9.59%), and Heights capital management (963.5K shares, 6.60%). Together, they hold 32.60% of ESS Tech’s total shares outstanding.

Does Blackrock own ESS Tech?

BlackRock is not among the top 10 institutional shareholders of ESS Tech.

Who is ESS Tech’s biggest shareholder by percentage of total assets invested?

Heights capital management is ESS Tech’s biggest shareholder by percentage of total assets invested, with 0.31% of its assets in 963.5K ESS Tech shares, valued at 1.13M$.

Who is the top mutual fund holder of ESS Tech shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of ESS Tech shares, with 1.30% of its total shares outstanding invested in 363.18K ESS Tech shares.

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