Amendment to Relationship Agreement

Aebi Schmidt Holding AG entered into Amendment No. 1 to the Relationship Agreement with PCS Holding AG and Peter Spuhler on April 7, 2026. This amendment modifies the original agreement from July 1, 2025, which outlined rights for the PCS Parties concerning their ownership of Aebi Schmidt common stock, including director nominations. The key changes involve the number of directors the PCS Parties can nominate based on their share ownership percentage, specifically when the Board consists of eight members. The amendment also allows the CEO of Aebi Schmidt to concurrently serve as the Chair of the Board. These changes aim to provide more flexibility in the company's governance structure.