ON SEMICONDUCTOR CORP

Ticker: ON CUSIP: 682189105 Class: EQTY

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

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

Q4 2014

Shares 24,430 Value ($000) $247 Avg Close $8.78 Range $6.76 - $10.44

Q3 2014

Shares 25,600 Value ($000) $229 Avg Close $9.24 Range $8.32 - $9.94

Q2 2014

Shares 25,600 Value ($000) $234 Avg Close $9.11 Range $8.22 - $10.07

Q1 2014

Shares 48,990 Value ($000) $461 Avg Close $8.98 Range $7.82 - $9.75

Q4 2013

Shares 50,500 Value ($000) $416 Avg Close $7.29 Range $6.80 - $8.35

Q3 2013

Shares 51,740 Value ($000) $378 Avg Close $7.67 Range $7.16 - $8.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	24,430	$247	$8.78	$6.76 - $10.44
Q3 2014	25,600	$229	$9.24	$8.32 - $9.94
Q2 2014	25,600	$234	$9.11	$8.22 - $10.07
Q1 2014	48,990	$461	$8.98	$7.82 - $9.75
Q4 2013	50,500	$416	$7.29	$6.80 - $8.35
Q3 2013	51,740	$378	$7.67	$7.16 - $8.50