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 — 2006

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2006-12-29$18.85$18.85102,600
2006-12-28$18.75$18.7577,400
2006-12-27$18.79$18.79131,000
2006-12-26$18.81$18.8182,600
2006-12-22$18.89$18.8949,800
2006-12-21$18.99$18.99137,400
2006-12-20$18.85$18.85284,000
2006-12-19$18.75$18.75239,400
2006-12-18$18.76$18.76272,400
2006-12-15$18.48$18.48317,400
2006-12-14$18.20$18.20129,400
2006-12-13$18.25$18.25263,800
2006-12-12$18.34$18.34206,800
2006-12-11$18.06$18.06283,400
2006-12-08$17.56$17.56332,000
2006-12-07$17.73$17.73275,000
2006-12-06$17.61$17.61289,600
2006-12-05$17.64$17.64518,400
2006-12-04$18.21$18.21370,000
2006-12-01$18.32$18.32185,000
2006-11-30$18.59$18.59219,800
2006-11-29$17.87$17.87254,400
2006-11-28$17.97$17.97284,400
2006-11-27$17.31$17.31734,200
2006-11-24$18.34$18.3483,200
2006-11-22$18.70$18.70151,000
2006-11-21$18.50$18.50214,200
2006-11-20$18.30$18.30196,600
2006-11-17$18.65$18.65202,400
2006-11-16$19.03$19.03152,400
2006-11-15$19.27$19.27135,400
2006-11-14$19.52$19.52227,800
2006-11-13$19.42$19.42179,600
2006-11-10$19.23$19.2366,800
2006-11-09$18.98$18.98460,800
2006-11-08$19.07$19.07185,600
2006-11-07$19.09$19.09138,000
2006-11-06$18.89$18.89507,200
2006-11-03$18.38$18.38143,600
2006-11-02$18.30$18.30590,200
2006-11-01$18.00$18.00473,000
2006-10-31$17.94$17.94178,600
2006-10-30$18.00$18.00452,400
2006-10-27$17.98$17.981,253,000
2006-10-26$18.42$18.42803,200
2006-10-25$19.06$19.06317,800
2006-10-24$19.06$19.06428,800
2006-10-23$18.71$18.71199,200
2006-10-20$18.39$18.39200,400
2006-10-19$18.50$18.50104,800
2006-10-18$18.45$18.45145,600
2006-10-17$18.45$18.45726,400
2006-10-16$18.59$18.59291,200
2006-10-13$18.38$18.38174,400
2006-10-12$18.50$18.50122,400
2006-10-11$18.22$18.22374,800
2006-10-10$18.19$18.19309,600
2006-10-09$18.17$18.17472,800
2006-10-06$17.92$17.92224,000
2006-10-05$17.99$17.99129,200
2006-10-04$17.92$17.92488,400
2006-10-03$17.47$17.47193,200
2006-10-02$17.55$17.55259,600
2006-09-29$17.65$17.65269,600
2006-09-28$17.73$17.73214,000
2006-09-27$17.53$17.53350,800
2006-09-26$17.31$17.31282,000
2006-09-25$17.02$17.02266,000
2006-09-22$16.94$16.94309,200
2006-09-21$16.85$16.8586,000
2006-09-20$16.95$16.95170,000
2006-09-19$16.74$16.74280,400
2006-09-18$16.95$16.95112,000
2006-09-15$16.93$16.93379,600
2006-09-14$17.05$17.05424,800
2006-09-13$16.86$16.86145,200
2006-09-12$16.95$16.95376,400
2006-09-11$16.80$16.8094,800
2006-09-08$16.74$16.74131,600
2006-09-07$17.14$17.1491,200
2006-09-06$17.49$17.49358,000
2006-09-05$17.44$17.44328,000
2006-09-01$17.05$17.05245,600
2006-08-31$17.21$17.2175,200
2006-08-30$17.13$17.13100,800
2006-08-29$17.15$17.15214,800
2006-08-28$16.96$16.96268,000
2006-08-25$17.43$17.43658,000
2006-08-24$17.46$17.46179,200
2006-08-23$17.31$17.31276,400
2006-08-22$17.30$17.30291,200
2006-08-21$17.28$17.28138,800
2006-08-18$17.30$17.30297,600
2006-08-17$17.18$17.18568,000
2006-08-16$17.35$17.35198,800
2006-08-15$17.56$17.56650,400
2006-08-14$17.23$17.23392,400
2006-08-11$16.56$16.56295,600
2006-08-10$16.49$16.49160,400
2006-08-09$16.39$16.39425,200
2006-08-08$16.85$16.85474,000
2006-08-07$16.86$16.86652,400
2006-08-04$16.33$16.33168,400
2006-08-03$16.36$16.36355,200
2006-08-02$16.51$16.51294,800
2006-08-01$16.21$16.211,154,400
2006-07-31$16.46$16.46561,200
2006-07-28$16.62$16.62698,800
2006-07-27$16.24$16.241,365,600
2006-07-26$15.59$15.593,969,600
2006-07-25$14.19$14.19341,200
2006-07-24$14.38$14.38294,000
2006-07-21$14.27$14.27422,000
2006-07-20$14.30$14.29455,600
2006-07-19$14.51$14.51295,200
2006-07-18$14.27$14.27342,800
2006-07-17$14.25$14.25330,400
2006-07-14$14.18$14.18293,600
2006-07-13$14.35$14.35892,000
2006-07-12$14.22$14.22245,200
2006-07-11$14.25$14.2476,400
2006-07-10$14.17$14.17182,800
2006-07-07$14.23$14.23186,000
2006-07-06$14.00$14.00186,000
2006-07-05$13.90$13.90631,200
2006-07-03$14.00$14.0099,600
2006-06-30$13.83$13.83259,600
2006-06-29$13.80$13.79149,600
2006-06-28$13.67$13.67193,600
2006-06-27$13.63$13.63101,200
2006-06-26$13.68$13.68270,800
2006-06-23$13.46$13.4690,400
2006-06-22$13.69$13.69504,800
2006-06-21$13.69$13.69164,400
2006-06-20$13.32$13.32110,400
2006-06-19$13.01$13.0130,000
2006-06-16$13.23$13.23113,200
2006-06-15$12.50$12.50228,800
2006-06-14$12.30$12.3079,200
2006-06-13$12.61$12.61216,800
2006-06-12$12.75$12.75180,400
2006-06-09$12.90$12.9033,200
2006-06-08$12.98$12.9856,800
2006-06-07$13.25$13.2578,800
2006-06-06$13.40$13.4083,200
2006-06-05$13.25$13.25133,200
2006-06-02$13.64$13.64359,600
2006-06-01$13.26$13.26178,400
2006-05-31$13.29$13.29105,600
2006-05-30$13.27$13.27122,800
2006-05-26$13.45$13.45332,400
2006-05-25$13.25$13.25652,400
2006-05-24$13.29$13.29234,400
2006-05-23$13.47$13.47106,000
2006-05-22$13.51$13.51159,200
2006-05-19$13.75$13.7486,800
2006-05-18$13.77$13.7794,800
2006-05-17$13.96$13.9696,800
2006-05-16$13.96$13.96326,400
2006-05-15$13.88$13.88100,800
2006-05-12$13.88$13.88449,200
2006-05-11$13.75$13.75155,200
2006-05-10$13.84$13.84836,800
2006-05-09$13.87$13.8761,600
2006-05-08$13.87$13.87201,200
2006-05-05$13.91$13.91425,600
2006-05-04$14.21$14.21220,400
2006-05-03$13.76$13.76261,200
2006-05-02$13.50$13.50478,800
2006-05-01$13.91$13.91263,600
2006-04-28$13.63$13.631,722,800
2006-04-27$13.00$13.00372,400
2006-04-26$13.11$13.1180,000
2006-04-25$13.25$13.2485,200
2006-04-24$12.98$12.9863,600
2006-04-21$12.86$12.86139,600
2006-04-20$12.81$12.81238,400
2006-04-19$12.38$12.38404,000
2006-04-18$12.10$12.10208,400
2006-04-17$11.97$11.9782,000
2006-04-13$12.00$12.0060,400
2006-04-12$11.85$11.858,000
2006-04-11$11.78$11.7864,000
2006-04-10$12.09$12.0950,000
2006-04-07$12.00$12.00110,800
2006-04-06$11.80$11.8032,800
2006-04-05$11.92$11.9234,000
2006-04-04$11.99$11.9916,400
2006-04-03$12.00$12.0056,400
2006-03-31$12.22$12.22130,000
2006-03-30$11.74$11.7472,400
2006-03-29$11.77$11.777,600
2006-03-28$11.83$11.839,200
2006-03-27$11.61$11.6128,800
2006-03-24$11.50$11.5038,400
2006-03-23$11.68$11.6849,600
2006-03-22$11.76$11.7669,200
2006-03-21$11.69$11.69157,200
2006-03-20$11.64$11.6427,600
2006-03-17$11.70$11.7059,200
2006-03-16$11.65$11.6524,400
2006-03-15$11.75$11.74116,800
2006-03-14$11.78$11.7872,000
2006-03-13$11.65$11.65122,000
2006-03-10$11.51$11.5162,000
2006-03-09$11.45$11.45156,400
2006-03-08$11.44$11.44112,000
2006-03-07$11.53$11.5352,000
2006-03-06$11.67$11.6786,800
2006-03-03$11.81$11.81131,600
2006-03-02$11.93$11.93226,800
2006-03-01$12.04$12.04125,600
2006-02-28$12.00$12.0091,200
2006-02-27$11.96$11.96183,600
2006-02-24$12.00$12.0062,800
2006-02-23$11.85$11.85219,200
2006-02-22$12.00$12.00226,800
2006-02-21$11.81$11.8184,800
2006-02-17$11.73$11.7322,800
2006-02-16$11.69$11.69100,000
2006-02-15$11.75$11.7587,200
2006-02-14$11.53$11.53105,200
2006-02-13$11.31$11.31420,800
2006-02-10$11.30$11.2930,000
2006-02-09$11.25$11.2563,600
2006-02-08$11.23$11.2328,000
2006-02-07$10.97$10.9766,400
2006-02-06$11.03$11.0399,200
2006-02-03$11.02$11.02169,200
2006-02-02$10.98$10.98231,600
2006-02-01$10.90$10.9054,400
2006-01-31$10.99$10.9915,200
2006-01-30$10.94$10.9444,000
2006-01-27$11.01$11.01395,600
2006-01-26$10.98$10.98703,200
2006-01-25$10.83$10.8339,200
2006-01-24$10.82$10.8296,000
2006-01-23$10.83$10.8336,400
2006-01-20$11.02$11.0240,000
2006-01-19$10.97$10.9741,200
2006-01-18$10.63$10.6326,000
2006-01-17$10.56$10.56104,800
2006-01-13$10.42$10.4217,600
2006-01-12$10.53$10.5347,600
2006-01-11$10.81$10.8151,600
2006-01-10$10.88$10.88151,600
2006-01-09$10.93$10.9353,600
2006-01-06$10.82$10.8235,600
2006-01-05$10.84$10.84140,800
2006-01-04$10.43$10.4382,000
2006-01-03$10.26$10.26126,800