Who owns ESS Tech, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of GWH from SEC Form 13F filings across 47 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 47 institutions disclosed 7.3M shares of ESS Tech, Inc. worth $6.9M — about 21.6% of shares outstanding; the largest disclosed holder is SOFTBANK GROUP CORP.. Source: SEC Form 13F filings, parsed by EvidInvest.
47
13F holders
$6.9M
value, 2026 filers
21.6%
of shares outstanding (7.3M sh)
6
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of GWH's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | SOFTBANK GROUP CORP. | 2.4M | $2.3M | 0.0% | 7.1% | 0.0% |
| 2 | Alyeska Investment Group, L.P. | 1.4M | $1.3M | 0.0% | 4.1% | 0.0% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 638,920 | $606,974 | 0.0% | 1.9% | +0.7% |
| 4 | UBS Group AG | 602,607 | $572,477 | 0.0% | 1.8% | +303.7% |
| 5 | Arosa Capital Management LP | 550,000 | $522,500 | 0.1% | 1.6% | -39.6% |
| 6 | HEIGHTS CAPITAL MANAGEMENT, INC | 548,621 | $521,190 | 0.1% | 1.6% | -43.1% |
| 7 | Shay Capital LLC | 210,146 | $199,639 | 0.0% | 0.6% | +16.7% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 210,037 | $199,547 | 0.0% | 0.6% | -6.0% |
| 9 | BlackRock, Inc. | 133,867 | $127,174 | 0.0% | 0.4% | +165.8% |
| 10 | VANGUARD FIDUCIARY TRUST CO | 129,877 | $123,383 | 0.0% | 0.4% | +87.1% |
| 11 | Green Alpha Advisors, LLC | 115,775 | $109,986 | 0.1% | 0.3% | +1.0% |
| 12 | Pathstone Holdings, LLC | 88,982 | $85,070 | 0.0% | 0.3% | +1.8% |
| 13 | FMR LLC | 52,485 | $49,861 | 0.0% | 0.2% | 0.0% |
| 14 | NORTHERN TRUST CORP | 47,532 | $45,155 | 0.0% | 0.1% | +51.7% |
| 15 | STATE STREET CORP | 46,975 | $44,626 | 0.0% | 0.1% | 0.0% |
| 16 | PKS Advisory Services, LLCNEW | 24,000 | $22,800 | 0.0% | 0.1% | new |
| 17 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 20,000 | $19,000 | 0.0% | 0.1% | 0.0% |
| 18 | JPMORGAN CHASE & CO | 19,896 | $19,616 | 0.0% | 0.1% | -36.9% |
| 19 | PRIMORIS WEALTH ADVISORS, LLC | 16,500 | $15,675 | 0.0% | 0% | 0.0% |
| 20 | RENAISSANCE TECHNOLOGIES LLCNEW | 12,700 | $12,065 | 0.0% | 0% | new |
| 21 | GSA CAPITAL PARTNERS LLP | 11,045 | $10,000 | 0.0% | 0% | -92.4% |
| 22 | OSAIC HOLDINGS, INC. | 8,359 | $7,938 | 0.0% | 0% | +34.0% |
| 23 | MORGAN STANLEY | 4,561 | $4,333 | 0.0% | 0% | -0.6% |
| 24 | Golden State Wealth Management, LLC | 2,707 | $2,572 | 0.0% | 0% | 0.0% |
| 25 | Rockefeller Capital Management L.P. | 2,024 | $1,923 | 0.0% | 0% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.