ICON PLC

Ticker: ICLR CUSIP: G4705A100 Class: SHS

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q1 2016

Shares 287,571 Value ($000) $21,597 Avg Close $70.08 Range $64.08 - $77.79

Q4 2015

Shares 275,315 Value ($000) $21,392 Avg Close $71.41 Range $63.20 - $78.88

Q3 2015

Shares 390,602 Value ($000) $27,721 Avg Close $75.27 Range $64.27 - $84.14

Q2 2015

Shares 424,700 Value ($000) $28,582 Avg Close $67.47 Range $62.36 - $71.80

Q1 2015

Shares 398,400 Value ($000) $28,099 Avg Close $61.98 Range $50.91 - $72.40

Q4 2014

Shares 395,600 Value ($000) $20,172 Avg Close $53.92 Range $49.75 - $59.81

Q3 2014

Shares 481,100 Value ($000) $27,533 Avg Close $51.48 Range $45.50 - $57.98

Q1 2014

Shares 406,300 Value ($000) $19,320 Avg Close $44.59 Range $38.91 - $50.00

Q4 2013

Shares 122,200 Value ($000) $4,939 Avg Close $39.76 Range $36.42 - $44.23

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2016	287,571	$21,597	$70.08	$64.08 - $77.79
Q4 2015	275,315	$21,392	$71.41	$63.20 - $78.88
Q3 2015	390,602	$27,721	$75.27	$64.27 - $84.14
Q2 2015	424,700	$28,582	$67.47	$62.36 - $71.80
Q1 2015	398,400	$28,099	$61.98	$50.91 - $72.40
Q4 2014	395,600	$20,172	$53.92	$49.75 - $59.81
Q3 2014	481,100	$27,533	$51.48	$45.50 - $57.98
Q1 2014	406,300	$19,320	$44.59	$38.91 - $50.00
Q4 2013	122,200	$4,939	$39.76	$36.42 - $44.23