144/A 0001959173-25-004820 0001269873 XXXXXXXX LIVE 0000842633 TRIMAS CORP 001-10716 38505 WOODWARD AVENUE SUITE 200 BLOOMFIELD HILLS MI 48304 2486315400 AMATO THOMAS A Former Officer & Director Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

65982 2332930.37 40641562 07/30/2025 NASDAQ Common 05/01/2021 Restricted Stock Vesting Issuer N 7295 05/01/2021 Compensation Common 03/11/2022 Restricted Stock Vesting Issuer N 16947 03/11/2022 Compensation Common 05/01/2022 Restricted Stock Vesting Issuer N 27247 05/01/2022 Compensation Common 03/11/2023 Restricted Stock Vesting Issuer N 14493 03/11/2023 Compensation N Thomas A. Amato

38505 Woodward Avenue Suite 200 Bloomfield Hills MI 48304

Common 07/29/2025 63965 2241703.40 This Form 144 amends and supersedes the Form 144 filed on July 30, 2025. The Number of Shares or Other Units Outstanding is corrected. 07/30/2025 /s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Thomas A. Amato