Peter Tassiopoulos

“Mr. Tassiopoulos has also tendered his resignation from the board of directors effective on December 15, 2025.”

“On December 12, 2025 (the “Effective Date”), ALT5 Sigma Corporation (the “Company”) and Peter Tassiopoulos, the former Chief Executive Officer of the Company, mutually agreed to enter into a Separation Agreement and Mutual Release of Claims (the “Separation Agreement”) pursuant to which Mr. Tassiopoulos’ employment with the Company and its affiliates, and his Employment Agreement dated August 26, 2024, will conclude on December 15, 2025 (the “Separation Date”), the Company will pay Mr. Tassiopoulos all salary and wages due and owing through the Separation Date (“Past Due Compensation”), and Mr. Tassiopoulos and the Company mutually release claims as well as other terms.”