ESS Tech, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Suhadolnik Kate Eileen | Interim CFO | Tax Withholding | 1,299 | $2.40 | $3,118 | 27,655 | Nov 20, 2025 |
| Goodman Kelly F. | Interim CEO | Tax Withholding | 4,513 | $2.40 | $10,831 | 80,622 | Nov 20, 2025 |
| NIGGLI MICHAEL R | — | Award / Grant | 13,513 | — | — | 90,825 | Oct 13, 2025 |
| WELLMAN ALEXI | — | Award / Grant | 13,513 | — | — | 38,886 | Oct 13, 2025 |
| Quarls Harry | — | Award / Grant | 13,513 | — | — | 13,513 | Oct 13, 2025 |
| Nijhawan Sandeep | — | Award / Grant | 13,513 | — | — | 29,050 | Oct 13, 2025 |
| Garabedian Raffi | — | Award / Grant | 13,513 | — | — | 39,672 | Oct 13, 2025 |
| Hossfeld Rich | — | Award / Grant | 13,513 | — | — | 27,859 | Oct 13, 2025 |
| Teamey Kyle | — | Award / Grant | 13,513 | — | — | 38,740 | Oct 13, 2025 |
| Suhadolnik Kate Eileen | Interim CFO | Tax Withholding | 1,232 | $1.61 | $1,984 | 28,954 | Aug 20, 2025 |
| Goodman Kelly F. | Interim CEO | Tax Withholding | 4,326 | $1.61 | $6,965 | 85,135 | Aug 20, 2025 |
| Trivedi Jigish Dhirajlal | COO | Award / Grant | 275,000 | — | — | 275,000 | Aug 18, 2025 |
| Goodman Kelly F. | Interim CEO | Tax Withholding | 2,164 | $1.96 | $4,241 | 89,461 | May 20, 2025 |
| Rabb Anthony | Chief Financial Officer | Tax Withholding | 2,741 | $1.96 | $5,372 | 109,392 | May 20, 2025 |
| Goodman Kelly F. | Interim CEO | Award / Grant | 36,930 | — | — | 91,625 | Apr 13, 2025 |
| Goodman Kelly F. | Interim CEO | Award / Grant | 10,000 | — | — | 56,184 | Feb 20, 2025 |
| Dresselhuys Eric P. | Chief Executive Officer | Purchase | 1,000 | $5.23 | $5,230 | 180,580 | Nov 18, 2024 |
| Nijhawan Sandeep | — | Sale | 7,000 | $5.72 | $40,040 | 15,537 | Sep 11, 2024 |
| Teamey Kyle | — | Purchase | 142 | $6.73 | $956 | 25,227 | Aug 30, 2024 |
| NIGGLI MICHAEL R | — | Option Exercise | 11,852 | $6.88 | $81,542 | 77,312 | Aug 29, 2024 |
| Garabedian Raffi | — | Award / Grant | 202,702 | — | — | 392,429 | May 17, 2024 |
| NIGGLI MICHAEL R | — | Award / Grant | 202,702 | — | — | 951,896 | May 17, 2024 |
| Nijhawan Sandeep | — | Award / Grant | 202,702 | — | — | 338,075 | May 17, 2024 |
| Quarls Harry | — | Award / Grant | 202,702 | — | — | 626,158 | May 17, 2024 |
| Teamey Kyle | — | Award / Grant | 202,702 | — | — | 376,311 | May 17, 2024 |
| WELLMAN ALEXI | — | Award / Grant | 202,702 | — | — | 380,633 | May 17, 2024 |
| Hossfeld Rich | — | Award / Grant | 202,702 | — | — | 215,202 | May 15, 2024 |
| Teamey Kyle | — | Purchase | 1,250 | $0.79 | $988 | 173,609 | May 14, 2024 |
| Quarls Harry | — | Purchase | 57,310 | $0.79 | $45,275 | 423,456 | May 10, 2024 |
| Quarls Harry | — | Purchase | 42,690 | $0.84 | $35,860 | 366,146 | May 9, 2024 |
| Hossfeld Rich | — | Purchase | 2,300 | $0.73 | $1,679 | 147,873 | Mar 15, 2024 |
| Dresselhuys Eric P. | Chief Executive Officer | Award / Grant | 622,771 | — | — | 2,718,239 | Mar 7, 2024 |
| Rabb Anthony | Chief Financial Officer | Award / Grant | 550,000 | — | — | 1,242,468 | Feb 15, 2024 |
| Quarls Harry | — | Purchase | 5,489 | $1.25 | $6,861 | 323,456 | Nov 16, 2023 |
| Quarls Harry | — | Purchase | 67,118 | $1.35 | $90,609 | 317,967 | Nov 15, 2023 |
| Quarls Harry | — | Purchase | 80,579 | $1.27 | $102,335 | 250,849 | Nov 14, 2023 |
| Teamey Kyle | — | Purchase | 1,000 | $1.11 | $1,110 | 172,359 | Nov 13, 2023 |
| Quarls Harry | — | Purchase | 46,814 | $1.10 | $51,495 | 170,270 | Nov 13, 2023 |
| Dresselhuys Eric P. | Chief Executive Officer | Award / Grant | 128,617 | — | — | 2,095,468 | Sep 5, 2023 |
| Quarls Harry | — | Award / Grant | 123,456 | — | — | 123,456 | Aug 28, 2023 |
| Rabb Anthony | Chief Financial Officer | Tax Withholding | 1,044 | $13.67 | $14,271 | 77,281 | Aug 20, 2023 |
| Nijhawan Sandeep | — | Award / Grant | 135,373 | — | — | 135,373 | May 19, 2023 |
| Garabedian Raffi | — | Award / Grant | 135,373 | — | — | 189,727 | May 19, 2023 |
| NIGGLI MICHAEL R | — | Award / Grant | 135,373 | — | — | 749,194 | May 19, 2023 |
| Teamey Kyle | — | Award / Grant | 135,373 | — | — | 171,359 | May 19, 2023 |
| WELLMAN ALEXI | — | Award / Grant | 135,373 | — | — | 177,931 | May 19, 2023 |
| Hossfeld Rich | — | Award / Grant | 135,373 | — | — | 145,373 | May 19, 2023 |
| NIGGLI MICHAEL R | — | Purchase | 10,000 | $0.81 | $8,100 | 613,821 | May 16, 2023 |
| Hossfeld Rich | — | Purchase | 10,000 | $0.81 | $8,100 | 10,000 | May 16, 2023 |
| Teamey Kyle | — | Purchase | 100 | $0.84 | $84 | 35,986 | May 15, 2023 |