🕵️ ESS Tech, Inc. ($GWH)
SEC insider & ownership activity, last 12 months · CIK 1819438 · every row links its SEC filing
Over the last 12 months insiders sold $13K against $26K of open-market buying. Drew P. Buckley bought $26K in discretionary trades (Jun). 2 red-flag 8-Ks in the window, most recently Delisting notice (3.01), Jun 30, 2026.
🚨 5 signals active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
API and the
alerts bot.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $26K (1 lots) · 2 sellers, $13K (6 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Drew P. Buckley | 1 | $26K | 0 | – | Jun 4, 2026 |
| Kelly F. Goodman | 0 | – | 3 | $8K | May 22, 2026 |
| Suhadolnik Kate Eileen | 0 | – | 3 | $5K | May 22, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Softbank Group Corp. | 20.2% | 13D | Aug 23, 2024 | filing ↗ | |
| Softbank Group Capital Ltd | 20.2% | 13D | Aug 23, 2024 | filing ↗ | |
| SB Energy Global Holdings One Ltd. | 20.2% | 13D | Aug 23, 2024 | filing ↗ | |
| SB Energy Global Holdings Limited | 20.2% | 13D | Aug 23, 2024 | filing ↗ | |
| Ayrton Capital LLC | 10.0% | 13G | May 11, 2026 | filing ↗ | |
| ALTO Opportunity Master Fund, SPC - Segregated Master Portfolio B | 10.0% | 13G | May 11, 2026 | filing ↗ | |
| Waqas Khatri | 10.0% | 13G | May 11, 2026 | filing ↗ | |
| Alyeska Investment Group, L.P. | 5.2% | 13G | May 15, 2026 | filing ↗ | |
| Alyeska Fund GP, LLC | 5.2% | 13G | May 15, 2026 | filing ↗ | |
| Anand Parekh | 5.2% | 13G | May 15, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Anthony A Rabb | $7K | Sep 25, 2025 | filing ↗ |
| Anthony A Rabb | $5K | Sep 17, 2025 | filing ↗ |
| Anthony A Rabb | $7K | Sep 10, 2025 | filing ↗ |
| Anthony A Rabb | $6K | Sep 4, 2025 | filing ↗ |
| Anthony A Rabb | $8K | Aug 29, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Jul 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 16, 2026 | filing ↗ |
| Delisting notice (3.01) | Jun 30, 2026 | filing ↗ |
| Earnings (2.02) | Jun 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 23, 2026 | filing ↗ |
| Other events (8.01) | Jun 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 23, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 12, 2026 | filing ↗ |
| Delisting notice (3.01) | Jun 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 9, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 29, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 10, 2026 | filing ↗ |
| Earnings (2.02) | Mar 5, 2026 | filing ↗ |
| Other events (8.01) | Mar 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 5, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 29, 2026 | filing ↗ |
| Earnings (2.02) | Jan 23, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 23, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 1, 2026 | filing ↗ |
| Material agreement (1.01) | Dec 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 4, 2025 | filing ↗ |
| Earnings (2.02) | Nov 13, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 13, 2025 | filing ↗ |
| Material agreement (1.01) | Nov 13, 2025 | filing ↗ |