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ESS Tech, Inc. Director's Dealing 2024

May 17, 2024

34863_dirs_2024-05-17_7879d162-fed5-4eb3-8846-02c598a9f66e.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ESS Tech, Inc. (GWH)
CIK: 0001819438
Period of Report: 2024-05-17

Reporting Person: NIGGLI MICHAEL R (Director)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2024-05-17 Common Stock A 202702 Acquired 951896 Direct

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock 85228 Indirect
Common Stock 85228 Indirect
Common Stock 85228 Indirect
Common Stock 568312 Indirect
Common Stock 227407 Indirect
Common Stock 85228 Indirect

Footnotes

F1: The reported shares are represented by restricted stock units ("RSUs") which vest on the earlier of (i) May 17, 2025 or (ii) the day prior to the next annual meeting of stockholders. The Reporting Person has elected to defer the settlement of these RSUs to a date within 30 days of the earlier of (i) his separation of service from the Issuer within the meaning of Section 409A of the Internal Revenue Code (Section 409A) or (ii) the date on which a change of control (as defined in the Issuer's plan) occurs, provided that such transaction qualifies as a change of control within the meaning of Section 409A.

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

F3: The shares are held of record by the Chloe D. Niggli Gift Trust for which the reporting person serves as trustee.

F4: The shares are held of record by the Michael R. Niggli Jr. 2021 Gift Trust for which the reporting person serves as trustee.

F5: The shares are held of record by the Lorelei A. Niggli 2021 Gift Trust for which the reporting person serves as trustee.

F6: The shares are held of record by the Linda Naviaux Niggli Trust for which the reporting person's spouse serves as trustee.

F7: The shares are held of record by the Michael R. Niggli Family Trust for which the reporting person serves as trustee.

F8: The shares are held of record by the Ian M. Niggli 2021 Gift Trust for which the reporting person serves as trustee.