ICON PLC

Ticker: ICLR CUSIP: G4705A100 Class: SHS

Nikko Asset Management Americas, Inc.'s Holding History (CIK: 0001480751)

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

Q4 2017

Shares 4,300 Value ($000) $490 Avg Close $115.23 Range $110.54 - $124.48

Q3 2017

Shares 4,300 Value ($000) $490 Avg Close $106.27 Range $96.03 - $117.53

Q4 2016

Shares 16,800 Value ($000) $1,263 Avg Close $77.66 Range $73.76 - $85.74

Q3 2016

Shares 14,500 Value ($000) $1,121 Avg Close $75.14 Range $69.05 - $79.61

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	4,300	$490	$115.23	$110.54 - $124.48
Q3 2017	4,300	$490	$106.27	$96.03 - $117.53
Q4 2016	16,800	$1,263	$77.66	$73.76 - $85.74
Q3 2016	14,500	$1,121	$75.14	$69.05 - $79.61