ICON PLC

Ticker: ICLR CUSIP: G4705A100 Class: SHS

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

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

Q3 2015

Shares 22,500 Value ($000) $1,597 Avg Close $75.27 Range $64.27 - $84.14

Q2 2015

Shares 30,450 Value ($000) $2,049 Avg Close $67.47 Range $62.36 - $71.80

Q1 2015

Shares 50,500 Value ($000) $3,561 Avg Close $61.98 Range $50.91 - $72.40

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	22,500	$1,597	$75.27	$64.27 - $84.14
Q2 2015	30,450	$2,049	$67.47	$62.36 - $71.80
Q1 2015	50,500	$3,561	$61.98	$50.91 - $72.40