ESS Tech Ownership | Who Owns ESS Tech?

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ESS Tech Ownership Summary

ESS Tech is owned by 8.95% institutional investors, 19.99% insiders, and 71.06% retail investors. Softbank group is the largest institutional shareholder, holding 19.53% of GWH shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 1.19% of its assets in ESS Tech shares.

GWH Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	ESS Tech	8.95%	19.99%	71.06%
Sector	Industrials Stocks	47.66%	12.52%	39.82%
Industry	Electrical Equipment Stocks	30.79%	16.75%	52.46%
Idea	Energy Storage Stocks List	25.85%	17.15%	57.00%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Softbank group	2.40M	19.53%	$3.64M
Arosa capital management lp	675.42K	5.50%	$1.03M
Vanguard group	485.92K	3.43%	$913.53K
Millennium management	1.78M	1.02%	$1.45M
Geode capital management	136.47K	0.96%	$256.58K
Green alpha advisors	118.68K	0.84%	$223.12K
Jane street group	109.01K	0.77%	$204.94K
Pathstone	88.98K	0.63%	$167.29K
Gsa capital partners llp	74.72K	0.53%	$140.00K
Jpmorgan chase	74.26K	0.52%	$139.61K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Arosa capital management lp	675.42K	0.23%	$1.03M
Green alpha advisors	118.68K	0.20%	$223.12K
Softbank group	2.40M	0.01%	$3.64M
Gsa capital partners llp	74.72K	0.01%	$140.00K
Primoris wealth advisors	10.00K	0.01%	$18.80K
Xtx topco	20.86K	0.00%	$31.71K
Millennium management	1.78M	0.00%	$1.45M
Pathstone	88.98K	0.00%	$167.29K
Golden state wealth management	2.72K	0.00%	$4.13K
Missouri trust & investment	633.00	0.00%	$962.00

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	1.78M	0.00%	1.67M
Arosa capital management lp	675.42K	0.23%	675.42K
Goldman sachs group	636.48K	0.00%	475.90K
Vanguard group	485.92K	-	221.59K
Green alpha advisors	118.68K	0.20%	108.06K

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
Arosa capital management lp	675.42K	0.23%	675.42K	$1.03M
Aqr capital management	102.26K	0.00%	102.26K	$83.64K
Pathstone	88.98K	0.00%	88.98K	$167.29K
Russell investments group	22.87K	-	22.87K	$18.70K
Lpl financial	14.24K	-	14.24K	$26.77K

Sold Out

Holder	Change
Newsquare capital	-5.00
Groupe la francaise	-6.00
Corecap advisors	-6.00
Financial gravity asset management	-12.00
Albion financial group /ut	-13.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	54	14.89%	3,477,106	6.37%	29	3.84%	23	187.50%	10	-74.36%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	363.18K	1.19%	50.30K
Vanguard Institutional Extnd Mkt Idx Tr	98.17K	0.32%	3.10K
Fidelity Extended Market Index	72.97K	0.24%	24.11K
Fidelity Select Technology	52.48K	0.17%	-
NT R2000 Value Index Fund - NL	279.54K	0.16%	5.86K
NT R2000 Index Fund - NL	224.52K	0.13%	-9.51K
Northern Trust Russell 2000 Value Index	184.53K	0.10%	4.69K
NT R2000 Value Index Fund - L	184.53K	0.10%	4.69K
BlackRock Extended Equity Market K	11.89K	0.10%	-5.00
NT R2000 Index Fund - DC - NL - 2	177.66K	0.10%	-8.19K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 20, 2026	Suhadolnik Kate Eileen	Chief Financial Officer	Sell	$1.14K
Feb 20, 2026	Goodman Kelly F.	SEE REMARKS	Sell	$3.49K
Nov 18, 2024	Dresselhuys Eric P.	Chief Executive Officer	Buy	$5.23K
Sep 11, 2024	Nijhawan Sandeep	-	Sell	$40.04K
Aug 30, 2024	Teamey Kyle	-	Buy	$955.66

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 8.95%, followed by 19.99% insiders and 71.06% retail investors. The average institutional ownership in ESS Tech's industry, Electrical Equipment Stocks, is 30.79%, which ESS Tech falls below.

Who owns the most shares of ESS Tech?

ESS Tech’s largest shareholders are Softbank group (2.4M shares, 19.53%), Arosa capital management lp (675.42K shares, 5.50%), and Vanguard group (485.92K shares, 3.43%). Together, they hold 28.47% 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?

Arosa capital management lp is ESS Tech’s biggest shareholder by percentage of total assets invested, with 0.23% of its assets in 675.42K ESS Tech shares, valued at 1.03M$.

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 1.19% of its total shares outstanding invested in 363.18K ESS Tech shares.

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