12 insiders reported 40 Form 4 transactions for ESS Tech, Inc. (GWH) over the past 18 months (most recent 2026-06-08). Recent activity: Buckley Drew P (CEO) Buy 25,000 shares, Nijhawan Sandeep (Director) Buy 13,513 shares, Garabedian Raffi (Director) Buy 13,513 shares, Quarls Harry (Director) Buy 13,513 shares, WELLMAN ALEXI (Director) Buy 13,513 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-08 | Buckley Drew P | CEO | Buy | 25,000 | $25,660 |
| 2026-06-02 | Nijhawan Sandeep | Director | Buy | 13,513 | $0 |
| 2026-06-02 | Garabedian Raffi | Director | Buy | 13,513 | $0 |
| 2026-06-02 | Quarls Harry | Director | Buy | 13,513 | $0 |
| 2026-06-02 | WELLMAN ALEXI | Director | Buy | 13,513 | $0 |
| 2026-06-02 | Hossfeld Rich | Director | Buy | 13,513 | $0 |
| 2026-05-26 | Suhadolnik Kate Eileen | Chief Financial Officer | Sell | 1,735 | $1,593 |
| 2026-05-26 | Goodman Kelly F. | SEE REMARKS | Sell | 2,482 | $2,279 |
| 2026-05-26 | Goodman Kelly F. | SEE REMARKS | Sell | 2,751 | $2,571 |
| 2026-05-26 | Suhadolnik Kate Eileen | Chief Financial Officer | Sell | 1,922 | $1,796 |
| 2026-02-26 | Suhadolnik Kate Eileen | Chief Financial Officer | Sell | 741 | $1,141 |
| 2026-02-26 | Goodman Kelly F. | SEE REMARKS | Sell | 2,269 | $3,494 |
| 2026-02-26 | Goodman Kelly F. | SEE REMARKS | Buy | 137,500 | $0 |
| 2026-02-26 | Suhadolnik Kate Eileen | Chief Financial Officer | Buy | 137,500 | $0 |
| 2025-11-21 | Suhadolnik Kate Eileen | Interim CFO | Sell | 1,299 | $3,118 |
| 2025-11-21 | Goodman Kelly F. | Interim CEO | Sell | 4,513 | $10,831 |
| 2025-10-15 | WELLMAN ALEXI | Director | Buy | 13,513 | $0 |
| 2025-10-15 | Garabedian Raffi | Director | Buy | 13,513 | $0 |
| 2025-10-15 | Quarls Harry | Director | Buy | 13,513 | $0 |
| 2025-10-15 | Hossfeld Rich | Director | Buy | 13,513 | $0 |
| 2025-10-15 | NIGGLI MICHAEL R | Director | Buy | 13,513 | $0 |
| 2025-10-15 | Nijhawan Sandeep | Director | Buy | 13,513 | $0 |
| 2025-10-15 | Teamey Kyle | Director | Buy | 13,513 | $0 |
| 2025-09-05 | Trivedi Jigish Dhirajlal | COO | Buy | 275,000 | $0 |
| 2025-08-29 | Suhadolnik Kate Eileen | Interim CFO | Sell | 1,232 | $1,984 |
Source: SEC Form 4 filings · as of 2026-06-08