GWH ESS Tech, Inc.
ESS Tech, Inc. (GWH) Institutional Ownership
What the institutions did with GWH last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| SOFTBANK GROUP CORP. | 2.4M | 26.5% |
| Alyeska Investment Group, L.P. | 1.4M | 15.5% |
| HEIGHTS CAPITAL MANAGEMENT, INC | 1.1M | 11.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 638.9K | 7.1% |
| UBS Group AG | 602.6K | 6.7% |
| Arosa Capital Management LP | 550.0K | 6.1% |
| LMR Partners LLP | 391.3K | 4.3% |
| Saba Capital Management, L.P. | 303.6K | 3.4% |
| OpenArc Corporate Advisory, LLC | 253.6K | 2.8% |
| Shay Capital LLC | 210.1K | 2.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 210.0K | 2.3% |
| BlackRock, Inc. | 133.9K | 1.5% |
| VANGUARD FIDUCIARY TRUST CO | 129.9K | 1.4% |
| Green Alpha Advisors, LLC | 115.8K | 1.3% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 107.5K | 1.2% |
| Vestcor Inc | 105.2K | 1.2% |
| Pathstone Holdings, LLC | 89.0K | 1.0% |
| JANE STREET GROUP, LLC | 58.4K | 0.6% |
| FMR LLC | 52.5K | 0.6% |
| NORTHERN TRUST CORP | 47.5K | 0.5% |
| STATE STREET CORP | 47.0K | 0.5% |
| PKS Advisory Services, LLC | 24.0K | 0.3% |
| Marathon Trading Investment Management LLC | 20.1K | 0.2% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 20.0K | 0.2% |
| JPMORGAN CHASE & CO | 19.9K | 0.2% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| UBS Group AG | Increased | 149.3K | 602.6K | +453.3K |
| LMR Partners LLP | New | 0 | 391.3K | +391.3K |
| Arosa Capital Management LP | Reduced | 910.0K | 550.0K | -360.0K |
| Saba Capital Management, L.P. | New | 0 | 303.6K | +303.6K |
| OpenArc Corporate Advisory, LLC | New | 0 | 253.6K | +253.6K |
| GSA CAPITAL PARTNERS LLP | Reduced | 145.6K | 11.0K | -134.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | 0 | 107.5K | +107.5K |
| Vestcor Inc | New | 0 | 105.2K | +105.2K |
| HEIGHTS CAPITAL MANAGEMENT, INC | Increased | 963.5K | 1.1M | +95.8K |
| BlackRock, Inc. | Increased | 50.4K | 133.9K | +83.5K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 69.4K | 129.9K | +60.5K |
| JANE STREET GROUP, LLC | New | 0 | 58.4K | +58.4K |
| Shay Capital LLC | Increased | 180.0K | 210.1K | +30.1K |
| PKS Advisory Services, LLC | New | 0 | 24.0K | +24.0K |
| Marathon Trading Investment Management LLC | New | 0 | 20.1K | +20.1K |
| Virtu Financial LLC | Sold Out | 18.7K | 0 | -18.7K |
| TWO SIGMA SECURITIES, LLC | Sold Out | 16.6K | 0 | -16.6K |
| NORTHERN TRUST CORP | Increased | 31.3K | 47.5K | +16.2K |
| Resurgent Financial Advisors LLC | Sold Out | 15.6K | 0 | -15.6K |
| LPL Financial LLC | Sold Out | 14.4K | 0 | -14.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 223.6K | 210.0K | -13.5K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 12.7K | +12.7K |
| JPMORGAN CHASE & CO | Reduced | 31.5K | 19.9K | -11.6K |
| WOLVERINE ASSET MANAGEMENT LLC | New | 0 | 4.8K | +4.8K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 634.7K | 638.9K | +4.2K |
| OSAIC HOLDINGS, INC. | Increased | 6.2K | 8.4K | +2.1K |
| Pathstone Holdings, LLC | Increased | 87.4K | 89.0K | +1.5K |
| Green Alpha Advisors, LLC | Increased | 114.6K | 115.8K | +1.2K |
| Parkside Financial Bank & Trust | Increased | 233 | 1.0K | +767 |
| BARCLAYS PLC | New | 0 | 639 | +639 |
| Missouri Trust & Investment Co | Sold Out | 633 | 0 | -633 |
| SBI Securities Co., Ltd. | Increased | 380 | 981 | +601 |
| Clear Street Group Inc. | New | 0 | 600 | +600 |
| TORONTO DOMINION BANK | New | 0 | 100 | +100 |
| HARBOUR INVESTMENTS, INC. | Increased | 149 | 243 | +94 |
| Archer Investment Corp | Increased | 68 | 136 | +68 |
| MORGAN STANLEY | Reduced | 4.6K | 4.6K | -27 |
| Larson Financial Group LLC | New | 0 | 20 | +20 |
| ROYAL BANK OF CANADA | Increased | 112 | 124 | +12 |
| Signature Equity Partners, LLC | Sold Out | 10 | 0 | -10 |
| Hilton Head Capital Partners, LLC | Sold Out | 8 | 0 | -8 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 163 | 157 | -6 |
| FMR LLC | Reduced | 52.5K | 52.5K | -4 |
| CITIGROUP INC | Sold Out | 1 | 0 | -1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.