🕵️ 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 $17K 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.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $26K (1 lots) · 2 sellers, $17K (8 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Drew P. Buckley | 1 | $26K | 0 | – | Jun 4, 2026 |
| Kelly F. Goodman | 0 | – | 4 | $11K | Aug 21, 2026 |
| Suhadolnik Kate Eileen | 0 | – | 4 | $6K | Aug 21, 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 | 8.1% | 13G | Aug 13, 2026 | filing ↗ | |
| ALTO Opportunity Master Fund, SPC - Segregated Master Portfolio B | 8.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Waqas Khatri | 8.1% | 13G | Aug 13, 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 ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Aug 28, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 20, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Aug 20, 2026 | filing ↗ |
| Other events (8.01) | Aug 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 20, 2026 | filing ↗ |
| Earnings (2.02) | Aug 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 11, 2026 | filing ↗ |
| Earnings (2.02) | Aug 6, 2026 | filing ↗ |
| Other events (8.01) | Aug 6, 2026 | filing ↗ |
| 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 ↗ |