GWHT: ESS Tech, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | Fell below 5% | Alyeska Investment Group, L.P. | 4.76% | SEC | |
| 2026-08-13 | 13G amendment | Ayrton Capital LLC | 8.14% | SEC |
Institutional ownership (Q2 2026)
47 institutions reported holding $6.93M of ESS Tech, Inc. on Form 13F (51 the quarter before). 4 opened a new position and 8 sold out. Shares held by institutions: -4%.
| Largest holders | Shares | Value |
|---|---|---|
| SOFTBANK GROUP CORP. | 2,396,980 | $2.28M |
| Alyeska Investment Group, L.P. | 1,400,000 | $1.33M |
| VANGUARD CAPITAL MANAGEMENT LLC | 638,920 | $607K |
| UBS Group AG | 602,607 | $572K |
| Arosa Capital Management LP | 550,000 | $522K |
| HEIGHTS CAPITAL MANAGEMENT, INC | 548,621 | $521K |
| Shay Capital LLC | 210,146 | $200K |
| GEODE CAPITAL MANAGEMENT, LLC | 210,037 | $200K |
| BlackRock, Inc. | 133,867 | $127K |
| VANGUARD FIDUCIARY TRUST CO | 129,877 | $123K |
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