ESS Tech, Inc. — Director's Dealing 2025

Sep 5, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ESS Tech, Inc. (GWH)
CIK: 0001819438
Period of Report: 2025-08-18

Reporting Person: Trivedi Jigish Dhirajlal (COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-18	Common Stock	A	275000	—	Acquired	275000	Direct

Footnotes

F1: The reported shares are represented by restricted stock units ("RSUs"), which vest as to 1/4th of the RSUs on August 20, 2026 and 1/16th of the RSUs shall vest quarterly thereafter, subject to the Reporting Person remains as Service Provider to the issuer through each such vest date.

F2: A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock.