AGIOS PHARMACEUTICALS INC

Ticker: AGIO CUSIP: 00847X104 Class: Common Stock

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

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

Q4 2014

Shares 27,997 Value ($000) $3,137 Avg Close $89.28 Range $58.55 - $124.39

Q3 2014

Shares 53,710 Value ($000) $3,295 Avg Close $43.10 Range $33.01 - $69.50

Q2 2014

Shares 53,710 Value ($000) $2,461 Avg Close $40.76 Range $31.42 - $50.37

Q1 2014

Shares 53,710 Value ($000) $2,103 Avg Close $33.46 Range $21.70 - $49.79

Q4 2013

Shares 65,090 Value ($000) $1,559 Avg Close $22.79 Range $15.77 - $33.59

Q3 2013

Shares 53,020 Value ($000) $1,482 Avg Close $27.61 Range $22.34 - $33.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	27,997	$3,137	$89.28	$58.55 - $124.39
Q3 2014	53,710	$3,295	$43.10	$33.01 - $69.50
Q2 2014	53,710	$2,461	$40.76	$31.42 - $50.37
Q1 2014	53,710	$2,103	$33.46	$21.70 - $49.79
Q4 2013	65,090	$1,559	$22.79	$15.77 - $33.59
Q3 2013	53,020	$1,482	$27.61	$22.34 - $33.45