SCHEDULE 13D/A 0000902664-24-005842 0002040467 XXXXXXXX LIVE 1 Common Stock, par value $0.01 per share 02/10/2025 false 0000842633 896215209 TRIMAS CORP

38505 WOODWARD AVENUE SUITE 200 BLOOMFIELD HILLS MI 48304

Trend International Holding AG 41 44 268 69 38 Wiesenstrasse 9 Zurich V8 8008 Ele Klein & Sean W. Brownridge 212-756-2000 Schulte Roth & Zabel LLP 919 Third Avenue New York NY 10022 0002040467 N Trend International Holding AG WC N V8 0.00 4170667.00 0.00 4170667.00 4170667.00 N 10.3 CO 0001321614 N Shawn Sedaghat AF N X1 0.00 4170667.00 0.00 4170667.00 4170667.00 N 10.3 IN Common Stock, par value $0.01 per share TRIMAS CORP 38505 WOODWARD AVENUE SUITE 200 BLOOMFIELD HILLS MI 48304 This Amendment No. 1 ("Amendment No. 1") amends the statement on Schedule 13D, filed by the Reporting Persons with the Securities and Exchange Commission on October 15, 2024 (the "Original Schedule 13D," and the Original Schedule 13D as amended, the "Schedule 13D"), with respect to the shares of Common Stock. This Amendment No. 1 amends and supplements the Schedule 13D as specifically set forth herein. Capitalized terms used herein and not otherwise defined in this Amendment No. 1 have the meanings set forth in the Schedule 13D. Item 4 is hereby amended and supplemented as follows: As disclosed in the Current Report on Form 8-K filed by the Issuer with the Securities and Exchange Commission on February 11, 2025, Mr. Sedaghat was appointed as a member of the Board, effective February 10, 2025. Trend International Holding AG /s/ Shawn Sedaghat 02/11/2025 Shawn Sedaghat /s/ Shawn Sedaghat 02/11/2025