ESS TECH INC (GWH) Institutional Shareholders
ESS TECH INC (GWH) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $6.95M in GWH holdings during the latest filing period.
Softbank Group Corp. is currently the largest disclosed institutional shareholder of GWH tracked by InsiderSet, reporting ownership valued at approximately $2.28M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $864,590.686, representing an estimated loss of -62.03% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 93% of the total disclosed GWH value among the investors covered in this analysis. Major shareholders include Softbank Group Corp., Alyeska Investment Group, L.P., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ESS TECH INC (GWH).
This page ranks the largest institutional GWH shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
45
Total Reported Value
$6.95M
Largest Holder
Softbank Group Corp.
Largest Position
$2.28M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
69
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Softbank Group Corp. | 0.01% | 2,396,980 | $2,277,131 | $864,591 | -$1,412,540 | -62.03% | |
| Alyeska Investment Group, L.P. | 0.00% | 1,400,000 | $1,330,000 | $504,980 | -$825,020 | -62.03% | |
| Vanguard Capital Management Llc | 0.00% | 638,920 | $606,974 | $230,458 | -$376,516 | -62.03% | |
| Ubs Group Ag | 0.00% | 602,607 | $572,477 | $217,360 | -$355,117 | -62.03% | |
| Arosa Capital Management Lp | 0.46% | 550,000 | $522,500 | $198,385 | -$324,115 | -62.03% | |
| Heights Capital Management, Inc | 0.12% | 548,621 | $521,190 | $197,888 | -$323,302 | -62.03% | |
| Shay Capital Llc | 0.02% | 210,146 | $199,639 | $75,800 | -$123,839 | -62.03% | |
| Geode Capital Management, Llc | 0.00% | 210,037 | $199,547 | $75,760 | -$123,787 | -62.03% | |
| Blackrock, Inc. | 0.00% | 133,867 | $127,174 | $48,286 | -$78,888 | -62.03% | |
| Vanguard Fiduciary Trust Co | 0.00% | 129,877 | $123,383 | $46,847 | -$76,536 | -62.03% | |
| Green Alpha Advisors, Llc | 0.07% | 115,775 | $109,986 | $41,760 | -$68,226 | -62.03% | |
| Pathstone Holdings, Llc | 0.00% | 87,448 | $102,314 | $31,542 | -$70,772 | -69.17% | |
| Fmr Llc | 0.00% | 52,485 | $49,861 | $18,931 | -$30,930 | -62.03% | |
| Northern Trust Corp | 0.00% | 47,532 | $45,155 | $17,145 | -$28,010 | -62.03% | |
| State Street Corp | 0.00% | 46,975 | $44,626 | $16,944 | -$27,682 | -62.03% | |
| Pks Advisory Services, Llc | 0.00% | 24,000 | $22,800 | $8,657 | -$14,143 | -62.03% | |
| Jpmorgan Chase & Co | 0.00% | 19,896 | $19,616 | $7,176 | -$12,440 | -63.42% | |
| Bridgeway Capital Management, Llc | 0.00% | 20,000 | $19,000 | $7,214 | -$11,786 | -62.03% | |
| Primoris Wealth Advisors, Llc | 0.01% | 16,500 | $15,675 | $5,952 | -$9,723 | -62.03% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 12,700 | $12,065 | $4,581 | -$7,484 | -62.03% |
| Gsa Capital Partners Llp | 0.00% | 11,045 | $10,000 | $3,984 | -$6,016 | -60.16% | |
| Osaic Holdings, Inc. | 0.00% | 8,359 | $7,938 | $3,015 | -$4,923 | -62.02% | |
| Morgan Stanley | 0.00% | 4,561 | $4,333 | $1,645 | -$2,688 | -62.03% | |
| Golden State Wealth Management, Llc | 0.00% | 2,707 | $2,572 | $976 | -$1,596 | -62.04% | |
| Rockefeller Capital Management L.P. | 0.00% | 2,024 | $1,923 | $730 | -$1,193 | -62.04% | |
| Vanguard Global Advisers, Llc | 0.00% | 1,314 | $1,248 | $474 | -$774 | -62.02% | |
| Parkside Financial Bank & Trust | 0.00% | 1,000 | $950 | $361 | -$589 | -62.03% | |
| Sbi Securities Co., Ltd. | 0.00% | 981 | $932 | $354 | -$578 | -62.03% | |
| National Bank Of Canada | 0.00% | 832 | $798 | $300 | -$498 | -62.39% | |
| Barclays Plc | 0.00% | 639 | $607 | $230 | -$377 | -62.03% | |
| Group One Trading Llc | 0.00% | 409 | $389 | $148 | -$241 | -62.08% | |
| Harbour Investments, Inc. | 0.00% | 243 | $231 | $88 | -$143 | -62.06% | |
| Smartleaf Asset Management Llc | 0.00% | 200 | $197 | $72 | -$125 | -63.38% | |
| Bnp Paribas Financial Markets | 0.00% | 157 | $149 | $57 | -$92 | -61.99% | |
| Jones Financial Companies Lllp | 0.00% | 166 | $141 | $60 | -$81 | -57.53% | |
| Newedge Advisors, Llc | 0.00% | 72 | $68 | $26 | -$42 | -61.81% | |
| Archer Investment Corp | 0.00% | 68 | $65 | $25 | -$40 | -62.27% | |
| Wolff Wiese Magana Llc | 0.00% | 66 | $63 | $24 | -$39 | -62.21% | |
| Mtm Investment Management, Llc | 0.00% | 40 | $38 | $14 | -$24 | -62.03% | |
| Wells Fargo & Company/Mn | 0.00% | 36 | $34 | $13 | -$21 | -61.81% | |
| Harbor Investment Advisory, Llc | 0.00% | 33 | $31 | $12 | -$19 | -61.60% | |
| Larson Financial Group Llc | 0.00% | 20 | $19 | $7 | -$12 | -62.03% | |
| Mather Group, Llc. | 0.00% | 20 | $19 | $7 | -$12 | -62.03% | |
| Cwm, Llc | 0.00% | 6 | $7 | $2 | -$5 | -69.08% | |
| Pinnacle Wealth Planning Services, Inc. | 0.00% | 6 | $6 | $2 | -$4 | -63.93% |
Frequently asked questions about GWH
Who owns the most GWH stock?
The largest holders of GWH are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ESS TECH INC (GWH).
Is GWH widely held by superinvestors?
Many widely followed stocks like GWH appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly GWH is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.