ACADIA PHARMACEUTICALS INC

Ticker: ACAD CUSIP: 004225108 Class: Common Stock

VIKING GLOBAL INVESTORS LP's Holding History (CIK: 0001103804)

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

Q4 2014

Shares 2,956,266 Value ($000) $93,861 Avg Close $28.36 Range $22.04 - $33.49

Q3 2014

Shares 4,324,890 Value ($000) $107,084 Avg Close $23.39 Range $19.21 - $29.31

Q2 2014

Shares 4,757,878 Value ($000) $107,480 Avg Close $20.88 Range $15.64 - $25.50

Q1 2014

Shares 3,598,407 Value ($000) $87,549 Avg Close $25.30 Range $21.20 - $32.00

Q4 2013

Shares 2,630,645 Value ($000) $65,739 Avg Close $23.59 Range $19.65 - $29.73

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	2,956,266	$93,861	$28.36	$22.04 - $33.49
Q3 2014	4,324,890	$107,084	$23.39	$19.21 - $29.31
Q2 2014	4,757,878	$107,480	$20.88	$15.64 - $25.50
Q1 2014	3,598,407	$87,549	$25.30	$21.20 - $32.00
Q4 2013	2,630,645	$65,739	$23.59	$19.65 - $29.73