TRIMAS CORP

Ticker: TRS CUSIP: 896215209 Class: Common Stock

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

Note: Option positions (PUT/CALL) are excluded.

Q1 2014

Shares 59,730 Value ($000) $1,983 Avg Close $28.23 Range $24.49 - $31.81

Q4 2013

Shares 59,730 Value ($000) $2,383 Avg Close $30.41 Range $28.07 - $33.54

Q3 2013

Shares 62,130 Value ($000) $2,317 Avg Close $29.78 Range $27.64 - $32.50

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	59,730	$1,983	$28.23	$24.49 - $31.81
Q4 2013	59,730	$2,383	$30.41	$28.07 - $33.54
Q3 2013	62,130	$2,317	$29.78	$27.64 - $32.50