AGIOS PHARMACEUTICALS INC

Ticker: AGIO CUSIP: 00847X104 Class: Common Stock

Atika Capital Management LLC's Holding History (CIK: 0001599731)

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

Q2 2015

Shares 5,950 Value ($000) $662 Avg Close $107.71 Range $90.58 - $126.35

Q1 2015

Shares 5,000 Value ($000) $471 Avg Close $112.06 Range $88.03 - $138.85

Q4 2014

Shares 27,000 Value ($000) $3,025 Avg Close $89.28 Range $58.55 - $124.39

Q3 2014

Shares 54,000 Value ($000) $3,313 Avg Close $43.10 Range $33.01 - $69.50

Q2 2014

Shares 12,000 Value ($000) $550 Avg Close $40.76 Range $31.42 - $50.37

Q1 2014

Shares 26,250 Value ($000) $1,028 Avg Close $33.46 Range $21.70 - $49.79

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	5,950	$662	$107.71	$90.58 - $126.35
Q1 2015	5,000	$471	$112.06	$88.03 - $138.85
Q4 2014	27,000	$3,025	$89.28	$58.55 - $124.39
Q3 2014	54,000	$3,313	$43.10	$33.01 - $69.50
Q2 2014	12,000	$550	$40.76	$31.42 - $50.37
Q1 2014	26,250	$1,028	$33.46	$21.70 - $49.79