Cooper-Standard Holdings Inc.

Item 1.01 Entry into a Material Definitive Agreement. On September 12, 2025, Cooper-Standard Holdings Inc. (the “Company”) entered into the First Amendment to the Section 382 Rights Agreement (the “First Amendment”), which amends the Section 382 Rights Agreement, dated as of November 7, 2022, by and between the Company and Broadridge Corporate Issuer Solutions, LLC (as successor-in-interest to Broadridge Corporate Issuer Solutions, Inc.), as Rights Agent (the “Rights Agreement”). Pursuant to the terms of the First Amendment, effective immediately as of September 12, 2025, the Company amended the Rights Agreement to extend the Final Expiration Date (as defined in the Rights Agreement) of the rights issued pursuant to the Rights Agreement from the close of business on November 6, 2025, to the close of business on November 5, 2026. Except for the extension of the Final Expiration Date, the Rights Agreement otherwise remains unmodified. The First Amendment has been adopted because the Company’s board of directors believes that it is in the best interests of the Company and its stockholders to extend the Final Expiration Date as set forth in the First Amendment. The foregoing summary of the First Amendment does not purport to be complete and is qualified in its entirety by reference to the complete text of the First Amendment, a copy of which have been filed as Exhibit 4.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 3.03 Material Modification to Rights of Security Holders. The information set forth in Item 1.01 of this Current Report on Form 8-K is incorporated by reference into this Item 3.03.