On August 24, 2022, Jeff Bodner, Chief Accounting Officer of ESS Tech, Inc. (the 'Company') tendered his resignation from the Company, to be effective as of September 12, 2022. The Company is appreciative of the service of Mr. Bodner, and his departure was not the result of any disagreement he had with the Company on any matter relating to the Company's operations, policies and practices, including any matters concerning the Company's controls or any financial or accounting-related matters or disclosures. In connection with Mr. Bodner's resignation, Amir Moftakhar, the Company's Chief Financial Officer, will assume the role and responsibilities of principal accounting officer on an interim basis as of the effective date of Mr. Bodner's resignation.

Mr. Moftakhar's biographical information is set forth in the Company's definite proxy statement filed with the Securities and Exchange Commission on April 22, 2022, and such information is incorporated herein by reference.