Director Michael Niggli resigns from ESS Tech board, effective May 29, 2026

ESS Tech, Inc.

Michael Niggli notified resignation from Board, Audit Committee, and Nominating and Corporate Governance Committee.
Resignation effective as of the date of the 2026 annual meeting of stockholders on May 29, 2026.
Resignation not due to any disagreement with the Company regarding operations, policies, or practices.
Niggli served as Founding Chairman of the Company.

item 5.02

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Departed

Michael Niggli

Director

ESS Tech, Inc.

Effective: 2026-05-29
Filed: Apr 15, 2026 23:59 UTC

On April 10, 2026, Michael Niggli notified ESS Tech, Inc. (the “Company”) that he is resigning from the Company’s Board of Directors (the “Board”), Audit Committee and Nominating and Corporate Governance Committee, effective as of the date of the Company’s 2026 annual meeting of stockholders to be held on May 29, 2026.

Source: SEC EDGAR

accession 0001819438-26-000022

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