Sec Form 4 Filing - Zeffiro A Mark @ TRIMAS CORP - 2013-10-29

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 Zeffiro A Mark 2. Issuer Name and Ticker or Trading Symbol TRIMAS CORP [ TRS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive Vice President & CFO (Last) (First) (Middle) 39400 WOODWARD AVENUE, SUITE 130 3. Date of Earliest Transaction (MM/DD/YY) 10/29/2013 (Street) BLOOMFIELD HILLS, MI48304 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 10/29/2013 M 5,250 A $ 0 ( 1 ) 82,438 I ( 2 ) See Footnote ( 2 ) Common Stock 10/29/2013 F 2,426 D $ 38.46 80,012 I ( 2 ) See Footnote ( 2 ) Common Stock 10/29/2013 S 14,500 D $ 40.53 65,512 I ( 2 ) See Footnote ( 2 ) Common Stock 10/29/2013 S 3,100 D $ 39.03 62,412 I ( 2 ) See Footnote ( 2 )

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 Restricted Stock Units $ 0 ( 1 ) 10/29/2013 M 5,250 ( 3 ) 09/30/2013( 4 ) Common Stock 5,250 $ 0 10,500 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Zeffiro A Mark 39400 WOODWARD AVENUE SUITE 130 BLOOMFIELD HILLS, MI48304 Executive Vice President & CFO Signatures /s/ Paula Reno attorney-in-fact 10/31/2013 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each restricted stock unit represents a contingent right to receive the Fair Market Value of one share of common stock, payable only in shares of common stock. ( 2 )Through the Aldo Mark Zeffiro Trust under agreement dated October 8, 2010, as Trustee. ( 3 )The first of three installments for restricted stock units granted pursuant to the Restricted Stock Unit Agreement dated February 24, 2011 ("Agreement") and the 2006 Long Term Equity Incentive Plan, vested on October 29, 2013 in satisfaction of the trading threshold as outlined in Section II.A.1(a) of the Agreement. ( 4 )Subject to graduated vesting as described in footnote (3) above and Section II.A.1 of the Agreement

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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