ENTEGRIS INC

Ticker: ENTG CUSIP: 29362U104 Class: EQTY

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

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

Q4 2014

Shares 170,800 Value ($000) $2,256 Avg Close $12.28 Range $10.22 - $13.37

Q3 2014

Shares 214,000 Value ($000) $2,461 Avg Close $11.78 Range $10.94 - $13.45

Q2 2014

Shares 214,000 Value ($000) $2,891 Avg Close $11.36 Range $10.24 - $13.27

Q1 2014

Shares 214,000 Value ($000) $2,592 Avg Close $11.16 Range $9.77 - $11.97

Q4 2013

Shares 210,000 Value ($000) $2,436 Avg Close $10.11 Range $9.45 - $11.15

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	170,800	$2,256	$12.28	$10.22 - $13.37
Q3 2014	214,000	$2,461	$11.78	$10.94 - $13.45
Q2 2014	214,000	$2,891	$11.36	$10.24 - $13.27
Q1 2014	214,000	$2,592	$11.16	$9.77 - $11.97
Q4 2013	210,000	$2,436	$10.11	$9.45 - $11.15