Sec Form 4 Filing - SEDAGHAT SHAWN @ TRIMAS CORP - 2025-03-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person SEDAGHAT SHAWN 2. Issuer Name and Ticker or Trading Symbol TRIMAS CORP [ TRS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) WIESENSTRASSE 9 3. Date of Earliest Transaction (MM/DD/YY) 03/14/2025 (Street) ZURICH, V88008 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/14/2025 A 4,140 A $ 0 4,174,807 D ( 1 ) ( 2 ) Common Stock 900,974 I See footnote ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SEDAGHAT SHAWN WIESENSTRASSE 9 ZURICH, V88008 X X Trend International Holding AG WIESENSTRASSE 9 ZURICH, V88008 X Signatures /s/ Jodi F. Robin, as attorney-in-fact 03/18/2025 Signature of Reporting Person Date /s/ Jodi F. Robin, as attorney-in-fact 03/18/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The 4,140 securities subject to the transaction reported herein (the "Director Shares") are directly held by Shawn Sedaghat ("Mr. Sedaghat"). Trend International Holding AG ("Trend") does not have beneficial ownership of the Director Shares, and specifically disclaims beneficial ownership of the Director Shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"). This report shall not be deemed to be an admission that Trend is the beneficial owner of the Director Shares for purposes of Section 16, or for any other purpose. ( 2 )4,170,667 of the securities reported in Table One, Column Five are held directly by Trend. Mr. Sedaghat (and together with Trend, the "Reporting Persons") may be deemed to beneficially own such reported securities by virtue of the fact that Mr. Sedaghat is the Chairman of the Board of, and controls, Trend. Each of Trend and Mr. Sedaghat disclaims beneficial ownership of such reported securities for purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Reporting Person is the beneficial owner of such reported securities for purposes of Section 16, or for any other purpose. ( 3 )The securities reported herein are directly held by Swan Family Office, LLC ("Swan Family Office"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact that Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of such securities for purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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