ESS Tech, Inc. (GWH) — Institutional Holders, Q2 2026
57 institutional investment managers reported a GWH position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $6.9M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
GWH in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- UBS Group AGAdded · +453,328 sh+$430.7K
- BlackRockAdded · +83,497 sh+$79.3K
- VANGUARD FIDUCIARYAdded · +60,475 sh+$57.5K
- Shay CapitalAdded · +30,146 sh+$28.6K
- PKS Advisory ServicesNew · +24,000 sh+$22.8K
Biggest sellers
- HEIGHTS CAPITAL MANAGEMENTTrimmed · -490,371 sh-$465.9K
- Arosa Capital ManagementTrimmed · -360,000 sh-$342.0K
- GSA CAPITAL PARTNERS LLPTrimmed · -134,533 sh-$127.8K
- Virtu FinancialSold out · -32,570 sh-$30.9K
- TWO SIGMA SECURITIESSold out · -16,592 sh-$15.8K
GWH 13F holders ranked 1–57 of 57
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | SOFTBANK GROUP#1 · 2,396,980 sh | 2,396,980 | $2.3M | 0.01% | 0.0% |
| 2 | Alyeska Investment Group, L.P.#2 · 1,400,000 sh | 1,400,000 | $1.3M | <0.01% | 0.0% |
| 3 | VANGUARD CAPITAL MANAGEMENT#3 · 638,920 sh | 638,920 | $607.0K | 0.00% | +0.7% |
| 4 | UBS Group AG#4 · 602,607 sh | 602,607 | $572.5K | <0.01% | +303.7% |
| 5 | HEIGHTS CAPITAL MANAGEMENT#5 · 1,059,342 sh | 1,059,342 | $524.0K | 0.12% | -31.6% |
| 6 | Arosa Capital Management#6 · 550,000 sh | 550,000 | $522.5K | 0.09% | -39.6% |
| 7 | Shay Capital#7 · 210,146 sh | 210,146 | $199.6K | 0.01% | +16.7% |
| 8 | GEODE CAPITAL MANAGEMENT#8 · 210,037 sh | 210,037 | $199.5K | 0.00% | -6.0% |
| 9 | BlackRock#9 · 133,867 sh | 133,867 | $127.2K | 0.00% | +165.8% |
| 10 | VANGUARD FIDUCIARY#10 · 129,877 sh | 129,877 | $123.4K | 0.00% | +87.1% |
| 11 | Green Alpha Advisors#11 · 115,775 sh | 115,775 | $110.0K | — | +1.0% |
| 12 | Pathstone#12 · 88,982 sh | 88,982 | $85.1K | <0.01% | +1.8% |
| 13 | FMR#13 · 52,485 sh | 52,485 | $49.9K | 0.00% | 0.0% |
| 14 | NORTHERN#14 · 47,532 sh | 47,532 | $45.2K | 0.00% | +51.7% |
| 15 | STATE STREET#15 · 46,975 sh | 46,975 | $44.6K | 0.00% | 0.0% |
| 16 | PKS Advisory Services#16 · 24,000 sh | 24,000 | $22.8K | — | New |
| 17 | JPMORGAN CHASE#17 · 19,896 sh | 19,896 | $19.6K | 0.00% | -36.9% |
| 18 | BRIDGEWAY CAPITAL MANAGEMENT#18 · 20,000 sh | 20,000 | $19.0K | <0.01% | 0.0% |
| 19 | PRIMORIS WEALTH ADVISORS#19 · 16,500 sh | 16,500 | $15.7K | <0.01% | 0.0% |
| 20 | RENAISSANCE TECHNOLOGIES#20 · 12,700 sh | 12,700 | $12.1K | 0.00% | New |
| 21 | GSA CAPITAL PARTNERS LLP#21 · 11,045 sh | 11,045 | $10.0K | <0.01% | -92.4% |
| 22 | OSAIC#22 · 8,359 sh | 8,359 | $7.9K | 0.00% | +34.0% |
| 23 | MORGAN STANLEY#23 · 4,561 sh | 4,561 | $4.3K | 0.00% | -0.6% |
| 24 | Golden State Wealth Management#24 · 2,707 sh | 2,707 | $2.6K | <0.01% | 0.0% |
| 25 | LMR Partners LLP#25 · 391,284 sh | 391,284 | $2.2K | 0.00% | 0.0% |
| 26 | Rockefeller Capital Management L.P.#26 · 2,024 sh | 2,024 | $1.9K | 0.00% | 0.0% |
| 27 | Parkside Financial Bank#27 · 2,000 sh | 2,000 | $1.9K | <0.01% | +758.4% |
| 28 | Saba Capital Management, L.P.#28 · 303,596 sh | 303,596 | $1.7K | 0.00% | 0.0% |
| 29 | OpenArc Corporate Advisory#29 · 253,555 sh | 253,555 | $1.4K | — | 0.0% |
| 30 | Vanguard Global Advisers#30 · 1,314 sh | 1,314 | $1.2K | 0.00% | 0.0% |
| 31 | Vestcor#31 · 105,182 sh | 105,182 | $1.0K | 0.00% | 0.0% |
| 32 | SBI Securities , Ltd.#32 · 981 sh | 981 | $932.00 | — | +158.2% |
| 33 | NATIONAL BANK OF CANADA#33 · 832 sh | 832 | $798.00 | 0.00% | 0.0% |
| 34 | BARCLAYS PLC#34 · 639 sh | 639 | $607.00 | 0.00% | New |
| 35 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#35 · 107,548 sh | 107,548 | $592.00 | 0.00% | -30.3% |
| 36 | GROUP ONE TRADING, L.P.#36 · 409 sh | 409 | $389.00 | 0.00% | 0.0% |
| 37 | Global Retirement Partners#37 · 366 sh | 366 | $348.00 | 0.00% | — |
| 38 | JANE STREET GROUP#38 · 58,356 sh | 58,356 | $321.00 | 0.00% | 0.0% |
| 39 | HARBOUR INVESTMENTS#39 · 243 sh | 243 | $231.00 | 0.00% | +63.1% |
| 40 | Smartleaf Asset Management#40 · 200 sh | 200 | $197.00 | 0.00% | 0.0% |
| 41 | BNP PARIBAS FINANCIAL MARKETS#41 · 157 sh | 157 | $149.00 | 0.00% | -3.7% |
| 42 | JONES FINANCIAL COMPANIES LLLP#42 · 166 sh | 166 | $141.00 | 0.00% | 0.0% |
| 43 | Marathon Trading Investment Management#43 · 20,130 sh | 20,130 | $111.00 | 0.00% | 0.0% |
| 44 | NewEdge Advisors#44 · 72 sh | 72 | $68.00 | 0.00% | New |
| 45 | Archer Investment#45 · 68 sh | 68 | $65.00 | 0.00% | 0.0% |
| 46 | WOLFF WIESE MAGANA#46 · 66 sh | 66 | $63.00 | — | 0.0% |
| 47 | MTM Investment Management#47 · 40 sh | 40 | $38.00 | 0.00% | 0.0% |
| 48 | WELLS FARGO & COMPANY#48 · 36 sh | 36 | $34.00 | 0.00% | 0.0% |
| 49 | HARBOR INVESTMENT ADVISORY#49 · 33 sh | 33 | $31.00 | — | 0.0% |
| 50 | WOLVERINE ASSET MANAGEMENT#50 · 4,834 sh | 4,834 | $27.00 | 0.00% | +33.0% |
| 51 | MATHER GROUP#51 · 20 sh | 20 | $19.00 | — | 0.0% |
| 52 | Larson Financial Group#52 · 20 sh | 20 | $19.00 | 0.00% | New |
| 53 | Pinnacle Wealth Planning Services#53 · 6 sh | 6 | $6.00 | 0.00% | 0.0% |
| 54 | Clear Street Group#54 · 600 sh | 600 | $3.00 | 0.00% | +200.0% |
| 55 | ROYAL BANK OF CANADA#55 · 124 sh | 124 | $0.00 | 0.00% | +10.7% |
| 56 | Coston, McIsaac & Partners#56 · 3 sh | 3 | $0.00 | 0.00% | 0.0% |
| 57 | TORONTO DOMINION BANK#57 · 100 sh | 100 | $0.00 | 0.00% | New |
Funds that sold out of GWH in Q2 2026 (10)
Held GWH at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Virtu Financial32,570 sh | 32,570 | $22.0K |
| TWO SIGMA SECURITIES16,592 sh | 16,592 | $19.4K |
| Resurgent Financial Advisors15,606 sh | 15,606 | $18.3K |
| LPL Financial14,429 sh | 14,429 | $16.9K |
| Greenhouse Wealth Management50,000 sh | 50,000 | $1.1K |
| Western Wealth Management666 sh | 666 | $779.00 |
| Missouri & Investment633 sh | 633 | $741.00 |
| Signature Equity Partners10 sh | 10 | $12.00 |
| Hilton Head Capital Partners8 sh | 8 | $9.00 |
| CITIGROUP1 sh | 1 | $1.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.