NASDAQ:ICLR | Historical Stock Price | ICON PLC

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1998-05-15 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$3.03$7.85$20.34$52.72$136.64$354.141998-05-152026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2005

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2005-12-30$10.29$10.2942,400
2005-12-29$10.14$10.1418,000
2005-12-28$10.34$10.3412,800
2005-12-27$10.25$10.256,000
2005-12-23$10.22$10.2249,200
2005-12-22$10.13$10.1322,800
2005-12-21$10.04$10.0451,600
2005-12-20$10.26$10.26194,400
2005-12-19$10.23$10.2330,000
2005-12-16$10.64$10.6497,200
2005-12-15$10.69$10.69103,200
2005-12-14$10.86$10.8634,000
2005-12-13$10.47$10.4754,800
2005-12-12$10.23$10.2347,600
2005-12-09$10.37$10.3719,600
2005-12-08$10.50$10.5089,600
2005-12-07$10.46$10.4672,400
2005-12-06$10.48$10.4850,400
2005-12-05$10.46$10.4666,000
2005-12-02$10.69$10.6929,200
2005-12-01$10.68$10.6835,600
2005-11-30$10.36$10.3672,800
2005-11-29$10.10$10.1080,000
2005-11-28$9.81$9.8120,800
2005-11-25$9.69$9.69800
2005-11-23$9.66$9.6613,200
2005-11-22$9.53$9.5316,000
2005-11-21$9.52$9.5261,200
2005-11-18$9.25$9.25156,400
2005-11-17$9.70$9.7062,800
2005-11-16$10.00$10.007,200
2005-11-15$10.05$10.052,400
2005-11-14$10.14$10.1478,000
2005-11-11$10.11$10.1111,600
2005-11-10$9.88$9.8878,400
2005-11-09$10.05$10.0529,200
2005-11-08$10.20$10.2048,000
2005-11-07$10.22$10.2278,400
2005-11-04$10.20$10.2041,200
2005-11-03$10.12$10.12117,200
2005-11-02$10.09$10.0962,800
2005-11-01$10.07$10.07189,600
2005-10-31$10.10$10.10196,800
2005-10-28$10.10$10.1022,400
2005-10-27$10.21$10.2142,000
2005-10-26$10.42$10.4240,400
2005-10-25$10.54$10.5424,000
2005-10-24$10.57$10.5734,400
2005-10-21$10.28$10.2869,200
2005-10-20$10.55$10.5551,600
2005-10-19$10.61$10.6133,600
2005-10-18$10.63$10.6384,800
2005-10-17$10.52$10.5244,000
2005-10-14$10.26$10.26149,200
2005-10-13$10.30$10.2962,400
2005-10-12$10.25$10.25198,800
2005-10-11$10.29$10.29244,000
2005-10-10$10.44$10.44449,200
2005-10-07$10.81$10.8140,400
2005-10-06$10.89$10.89103,600
2005-10-05$11.29$11.29119,600
2005-10-04$11.58$11.58208,400
2005-10-03$11.88$11.88234,000
2005-09-30$12.50$12.50804,400
2005-09-29$11.25$11.2548,400
2005-09-28$11.50$11.50104,800
2005-09-27$11.24$11.24390,400
2005-09-26$10.58$10.5834,800
2005-09-23$10.59$10.5954,800
2005-09-22$10.71$10.71144,400
2005-09-21$10.63$10.63104,800
2005-09-20$10.66$10.6683,200
2005-09-19$10.62$10.6226,400
2005-09-16$10.74$10.74112,000
2005-09-15$10.54$10.54120,400
2005-09-14$10.55$10.5570,000
2005-09-13$10.55$10.5569,200
2005-09-12$10.45$10.4560,800
2005-09-09$10.50$10.5040,400
2005-09-08$10.42$10.4235,200
2005-09-07$10.47$10.4734,800
2005-09-06$10.41$10.4192,800
2005-09-02$10.17$10.174,000
2005-09-01$10.25$10.25252,800
2005-08-31$10.14$10.14244,400
2005-08-30$10.00$10.0039,200
2005-08-29$10.02$10.0213,600
2005-08-26$9.91$9.91130,400
2005-08-25$9.99$9.9927,600
2005-08-24$9.89$9.8934,400
2005-08-23$9.89$9.8965,200
2005-08-22$9.89$9.899,600
2005-08-19$9.94$9.94231,200
2005-08-18$10.00$10.0094,800
2005-08-17$10.00$10.0088,000
2005-08-16$9.86$9.8660,000
2005-08-15$9.87$9.8722,400
2005-08-12$9.75$9.7587,600
2005-08-11$9.75$9.756,000
2005-08-10$9.78$9.7838,400
2005-08-09$9.76$9.76104,000
2005-08-08$9.83$9.8321,600
2005-08-05$9.87$9.87238,800
2005-08-04$10.19$10.19164,000
2005-08-03$10.17$10.17255,600
2005-08-02$10.18$10.18374,400
2005-08-01$9.56$9.5653,600
2005-07-29$9.79$9.79110,400
2005-07-28$9.75$9.7518,800
2005-07-27$9.58$9.5813,600
2005-07-26$9.69$9.6937,600
2005-07-25$9.56$9.562,000
2005-07-22$9.58$9.5843,600
2005-07-21$9.65$9.6541,600
2005-07-20$9.90$9.90506,400
2005-07-19$9.84$9.8440,800
2005-07-18$9.56$9.5653,600
2005-07-15$9.58$9.58112,400
2005-07-14$9.50$9.50103,200
2005-07-13$9.49$9.4982,000
2005-07-12$9.42$9.4237,600
2005-07-11$9.40$9.4024,000
2005-07-08$9.50$9.5040,000
2005-07-07$9.38$9.3898,400
2005-07-06$9.25$9.25142,800
2005-07-05$8.75$8.7516,400
2005-07-01$8.66$8.6646,400
2005-06-30$8.66$8.6669,600
2005-06-29$8.74$8.7448,400
2005-06-28$8.75$8.75186,000
2005-06-27$8.72$8.7261,600
2005-06-24$8.66$8.6688,800
2005-06-23$8.57$8.57112,800
2005-06-22$8.59$8.59195,200
2005-06-21$7.99$7.9971,600
2005-06-20$8.00$8.00116,400
2005-06-17$8.03$8.0368,000
2005-06-16$7.92$7.9266,000
2005-06-15$7.93$7.93113,600
2005-06-14$7.92$7.92211,600
2005-06-13$7.91$7.91190,400
2005-06-10$7.93$7.93128,000
2005-06-09$7.90$7.9069,200
2005-06-08$7.94$7.94120,400
2005-06-07$7.95$7.95133,600
2005-06-06$7.96$7.96109,200
2005-06-03$7.96$7.96309,200
2005-06-02$7.88$7.88286,000
2005-06-01$7.58$7.58180,800
2005-05-31$7.57$7.57549,600
2005-05-27$7.64$7.63212,400
2005-05-26$7.74$7.74620,400
2005-05-25$7.73$7.73130,800
2005-05-24$7.76$7.76413,600
2005-05-23$7.77$7.77481,600
2005-05-20$7.79$7.79225,600
2005-05-19$7.87$7.87162,800
2005-05-18$7.85$7.85349,200
2005-05-17$7.80$7.8019,600
2005-05-16$7.95$7.9545,200
2005-05-13$8.00$8.00164,000
2005-05-12$8.12$8.12122,800
2005-05-11$8.17$8.1791,200
2005-05-10$8.34$8.3453,200
2005-05-09$8.39$8.39129,200
2005-05-06$8.33$8.3311,600
2005-05-05$8.19$8.19146,800
2005-05-04$8.14$8.14408,000
2005-05-03$8.50$8.5058,000
2005-05-02$8.51$8.51157,600
2005-04-29$8.31$8.31151,600
2005-04-28$8.44$8.4475,600
2005-04-27$8.30$8.30118,000
2005-04-26$8.19$8.19922,400
2005-04-25$8.80$8.80291,600
2005-04-22$8.80$8.8066,000
2005-04-21$8.78$8.78312,800
2005-04-20$8.70$8.70162,000
2005-04-19$8.94$8.94235,600
2005-04-18$8.90$8.90100,800
2005-04-15$8.83$8.83116,400
2005-04-14$8.90$8.9073,200
2005-04-13$9.06$9.06169,200
2005-04-12$9.31$9.3138,000
2005-04-11$9.27$9.2736,800
2005-04-08$9.31$9.31127,200
2005-04-07$9.54$9.5486,800
2005-04-06$9.61$9.61123,200
2005-04-05$9.33$9.33244,800
2005-04-04$9.34$9.34136,400
2005-04-01$9.44$9.44263,600
2005-03-31$9.38$9.38289,600
2005-03-30$9.38$9.38334,000
2005-03-29$9.35$9.35132,400
2005-03-28$9.74$9.74146,800
2005-03-24$9.54$9.5475,200
2005-03-23$9.57$9.5786,400
2005-03-22$9.53$9.5371,200
2005-03-21$9.46$9.4652,800
2005-03-18$9.40$9.4086,400
2005-03-17$9.38$9.38206,400
2005-03-16$9.13$9.1396,400
2005-03-15$9.13$9.13215,200
2005-03-14$9.10$9.1073,200
2005-03-11$9.13$9.13159,200
2005-03-10$9.09$9.0962,800
2005-03-09$8.89$8.89107,600
2005-03-08$8.61$8.61702,800
2005-03-07$9.00$9.0076,400
2005-03-04$8.78$8.78100,400
2005-03-03$8.76$8.76102,800
2005-03-02$8.75$8.75235,200
2005-03-01$8.72$8.72122,000
2005-02-28$8.95$8.9559,600
2005-02-25$8.95$8.9555,200
2005-02-24$8.84$8.84104,400
2005-02-23$8.85$8.85117,200
2005-02-22$8.87$8.87174,800
2005-02-18$8.96$8.96245,600
2005-02-17$9.01$9.01250,000
2005-02-16$9.02$9.02416,800
2005-02-15$9.06$9.06244,000
2005-02-14$8.81$8.81172,000
2005-02-11$8.81$8.81239,600
2005-02-10$8.75$8.75120,400
2005-02-09$8.71$8.71268,800
2005-02-08$8.86$8.86225,600
2005-02-07$8.68$8.68254,000
2005-02-04$8.60$8.60212,800
2005-02-03$8.50$8.501,490,800
2005-02-02$8.45$8.45217,600
2005-02-01$8.50$8.50260,000
2005-01-31$8.78$8.78744,000
2005-01-28$8.71$8.7138,000
2005-01-27$8.75$8.75207,200
2005-01-26$8.84$8.84123,600
2005-01-25$8.80$8.80126,400
2005-01-24$8.76$8.7646,400
2005-01-21$9.05$9.05129,200
2005-01-20$9.16$9.16385,200
2005-01-19$8.83$8.83100,800
2005-01-18$8.70$8.70141,200
2005-01-14$8.73$8.73196,000
2005-01-13$8.89$8.89126,000
2005-01-12$8.89$8.8992,000
2005-01-11$8.85$8.85403,200
2005-01-10$8.91$8.91629,600
2005-01-07$8.92$8.92232,400
2005-01-06$8.75$8.751,914,800
2005-01-05$9.06$9.06856,400
2005-01-04$9.51$9.51260,400
2005-01-03$9.50$9.50209,200