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 OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * HEARTLAND INDUSTRIAL ASSOCIATES LLC   2. Issuer Name and Ticker or Trading Symbol TRIMAS CORP [TRS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) __X__ Other (specify below) See Footnote 1 (Last) (First) (Middle) 177 BROAD STREET, 10TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 11/30/2011 (Street) STAMFORD, CT 06901 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 11/30/2011   S   2,000,000 D $ 19.45 5,404,972 I See Footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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
HEARTLAND INDUSTRIAL ASSOCIATES LLC 177 BROAD STREET 10TH FLOOR STAMFORD, CT 06901		X		See Footnote 1

Signatures

/s/ Daniel P. Tredwell, Managing Member		12/02/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	These securities are owned directly by TriMas Investment Fund I, L.L.C. ("TIF I"). TIF I will sell 2,000,000 shares. Following the sale of these securities, TIF I will own 2,630,536 shares. Heartland Industrial Partners, L.P. ("Heartland Partners"), as the managing member of TIF I, and Heartland Industrial Associates, L.L.C. ("Heartland"), as the General Partner of Heartland Partners, may each be deemed to be an indirect beneficial owner of the securities held by TIF I and each disclaims beneficial ownership (as defined in Rule 16a-1(a)(2)) of these securities except to the extent of its pecuniary interest therein.
(2)	Heartland, Heartland Partners and TIF I may be deemed to be members of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934.
Remarks: Signature by Daniel P. Tredwell, as Managing Member of Heartland, which is General Partner of Heartland Partners, which is managing member of TIF I.

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