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Filing Details

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
1179822	Heartland Industrial Associates Llc	177 Broad Street 10Th Floor Stamford CT 06901		No	No	Yes	No
1481249	Hip Investment Holdings I, Llc	177 Broad Street 10Th Floor Stamford CT 06901		No	No	No	Yes

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2010-05-26	26,000	$10.00	2,009,076	No	4	S	Indirect	See Footnotes
Common Stock	Disposition	2010-05-27	124,400	$10.01	1,884,676	No	4	S	Indirect	See Footnotes
Common Stock	Disposition	2010-05-28	17,700	$10.00	1,866,976	No	4	S	Indirect	See Footnotes

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

Footnotes

These securities are owned directly by HIP Investment Holdings I, LLC ("Holdings"). Heartland Industrial Partners, L.P. ("Heartland Partners"), as the sole member of Holdings, 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 Holdings 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.
Heartland, Heartland Partners and Holdings may be deemed to be members of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934.