ESS Tech, Inc. Form 8-K Filing Summary

On June 12, 2026, Rich Hossfeld resigned from the board of directors and the Audit Committee of ESS Tech, Inc. The resignation was not due to any disagreements regarding the Company's operations, policies, or practices. Raffi Garabedian was appointed to replace Mr. Hossfeld on the Audit Committee, effective the same day. The Company expressed gratitude for Mr. Hossfeld's service and contributions. The filing is a Current Report (Form 8-K) detailing these changes in corporate governance.