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Filing Details

Accession Number:: 0000842633-13-000122
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-05-28 17:19:10
Reporting Period:: 2013-05-23

Filing Date:: 2013-05-28
Accepted Time:: 2013-05-28 17:19:10
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
842633	Trimas Corp	TRS	Metal Forgings & Stampings (3460)	382687639

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1399401	P Daniel Tredwell	177 Broad Street 10Th Floor Stamford CT 06901		Yes	No	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-05-23	31,000	$32.54	2,248,972	No	4	S	Indirect	See Footnote
Common Stock	Disposition	2013-05-24	21,900	$32.57	2,227,072	No	4	S	Indirect	See Footnote
Common Stock	Disposition	2013-05-28	13,902	$32.62	2,213,170	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Footnote
No	4	S	Indirect	See Footnote
No	4	S	Indirect	See Footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	3,448	Direct

Footnotes

Represents the weighted average sale price of $32.54 rounded to the nearest hundredths. The highest price at which the shares were purchased was $32.65 and the lowest price at which the shares were purchased was $32.50, in each case, rounded to the nearest hundredths. The Reporting Person undertakes that he will provide, upon request by the staff of the U.S. Securities and Exchange Commission, full information regarding the number of securities purchased at each separate price.
These securities are owned directly by TriMas Investment Fund I, L.L.C. ("TIF I"). The Reporting Person is the Managing Member of Heartland Industrial Associates, L.L.C. ("Heartland"), the General Partner of Heartland Industrial Partners, L.P., which is TIF I's Managing Member. Prior acquisitions and dispositions by Heartland and its affiliated funds of shares of TriMas Corporation common stock were previously reported by Heartland and its affiliated funds, which are no longer subject to Section 16 reporting obligations. The Reporting Person disclaims beneficial ownership (as defined in Rule 16a-1(a)(2)) of thesesecurities except to the extent of his pecuniary interest therein.
Represents the weighted average sale price of $32.57 rounded to the nearest hundredths. The highest price at which the shares were purchased was $32.86 and the lowest price at which the shares were purchased was $32.50, in each case, rounded to the nearest hundredths. The Reporting Person undertakes that he will provide, upon request by the staff of the U.S. Securities and Exchange Commission, full information regarding the number of securities purchased at each separate price.
Represents the weighted average sale price of $32.62 rounded to the nearest hundredths. The highest price at which the shares were purchased was $32.88 and the lowest price at which the shares were purchased was $32.50, in each case, rounded to the nearest hundredths. The Reporting Person undertakes that he will provide, upon request by the staff of the U.S. Securities and Exchange Commission, full information regarding the number of securities purchased at each separate price.