| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Suhadolnik Kate Eileen | Interim CFO | C/O ESS TECH, INC., 26440 SW PARKWAY AVE., BLDG. 83, WILSONVILLE | /s/ Bianca Boschmans, by power of attorney | 29 Aug 2025 | 0002083724 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GWH | Common Stock | Tax liability | $1,984 | -1,232 | -4.1% | $1.61 | 28,954 | 20 Aug 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | The reported shares were withheld by the Issuer upon vesting of RSUs to satisfy tax withholding obligations. |
| F2 | A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. |