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 — 2011

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2011-12-30$17.11$17.1179,100
2011-12-29$16.96$16.96119,000
2011-12-28$16.69$16.69132,300
2011-12-27$16.75$16.75187,600
2011-12-23$16.86$16.86119,900
2011-12-22$17.25$17.25179,000
2011-12-21$16.68$16.68195,500
2011-12-20$16.82$16.82175,700
2011-12-19$16.42$16.42294,400
2011-12-16$15.99$15.99329,600
2011-12-15$16.09$16.09190,900
2011-12-14$16.04$16.04360,400
2011-12-13$16.07$16.07438,800
2011-12-12$16.14$16.14203,700
2011-12-09$16.10$16.10297,300
2011-12-08$16.10$16.10252,400
2011-12-07$16.24$16.24453,700
2011-12-06$16.63$16.63145,400
2011-12-05$16.67$16.67344,800
2011-12-02$16.60$16.60375,500
2011-12-01$16.69$16.69221,000
2011-11-30$17.01$17.01134,000
2011-11-29$16.53$16.53210,200
2011-11-28$16.88$16.88107,000
2011-11-25$17.00$17.0083,400
2011-11-23$16.79$16.79398,500
2011-11-22$16.51$16.5181,000
2011-11-21$16.41$16.41275,900
2011-11-18$16.60$16.60278,800
2011-11-17$16.63$16.63168,800
2011-11-16$16.86$16.86137,500
2011-11-15$17.03$17.0385,500
2011-11-14$16.92$16.92123,800
2011-11-11$17.19$17.1996,900
2011-11-10$16.96$16.96234,800
2011-11-09$17.09$17.09157,700
2011-11-08$17.47$17.47205,800
2011-11-07$17.17$17.17139,700
2011-11-04$16.97$16.97170,900
2011-11-03$17.48$17.48244,600
2011-11-02$17.32$17.32424,400
2011-11-01$16.81$16.81379,300
2011-10-31$16.80$16.80194,500
2011-10-28$17.20$17.20571,600
2011-10-27$17.65$17.65838,300
2011-10-26$15.78$15.78408,800
2011-10-25$15.68$15.68282,700
2011-10-24$15.83$15.83336,000
2011-10-21$15.73$15.73142,400
2011-10-20$15.53$15.53314,100
2011-10-19$15.50$15.50424,900
2011-10-18$15.64$15.64434,700
2011-10-17$15.76$15.76325,800
2011-10-14$16.44$16.44341,300
2011-10-13$16.04$16.04627,500
2011-10-12$15.50$15.50679,800
2011-10-11$15.12$15.12389,700
2011-10-10$15.40$15.40692,200
2011-10-07$15.42$15.42770,800
2011-10-06$15.80$15.80614,100
2011-10-05$15.88$15.88419,500
2011-10-04$16.28$16.28424,400
2011-10-03$16.01$16.01352,800
2011-09-30$16.08$16.08349,700
2011-09-29$16.50$16.50395,800
2011-09-28$16.88$16.88306,100
2011-09-27$17.36$17.36273,300
2011-09-26$17.87$17.87381,200
2011-09-23$17.40$17.40249,000
2011-09-22$17.14$17.14561,000
2011-09-21$17.16$17.16264,700
2011-09-20$17.51$17.51142,700
2011-09-19$17.77$17.77240,900
2011-09-16$17.94$17.94581,700
2011-09-15$18.38$18.38363,300
2011-09-14$18.53$18.53421,000
2011-09-13$18.74$18.74113,500
2011-09-12$18.74$18.74384,000
2011-09-09$18.50$18.50317,700
2011-09-08$19.14$19.14679,000
2011-09-07$19.85$19.85475,400
2011-09-06$20.42$20.42406,500
2011-09-02$20.32$20.32317,700
2011-09-01$21.17$21.17259,300
2011-08-31$21.31$21.31437,700
2011-08-30$21.38$21.38499,100
2011-08-29$20.14$20.14154,900
2011-08-26$19.00$19.00174,700
2011-08-25$19.05$19.05208,600
2011-08-24$19.24$19.24276,800
2011-08-23$19.22$19.22168,800
2011-08-22$19.18$19.18141,800
2011-08-19$19.10$19.10149,900
2011-08-18$19.02$19.02182,400
2011-08-17$19.72$19.72107,500
2011-08-16$19.92$19.92662,200
2011-08-15$19.45$19.45344,200
2011-08-12$19.19$19.19212,900
2011-08-11$19.32$19.32224,300
2011-08-10$18.99$18.99172,700
2011-08-09$19.75$19.75459,400
2011-08-08$19.01$19.01488,000
2011-08-05$20.20$20.20467,500
2011-08-04$19.64$19.64598,100
2011-08-03$20.25$20.25534,200
2011-08-02$21.07$21.07416,100
2011-08-01$21.38$21.38606,800
2011-07-29$22.33$22.33152,200
2011-07-28$22.34$22.34238,400
2011-07-27$22.38$22.38471,600
2011-07-26$22.30$22.30258,400
2011-07-25$22.93$22.93264,500
2011-07-22$23.00$23.00348,400
2011-07-21$23.05$23.05897,800
2011-07-20$22.73$22.731,467,100
2011-07-19$23.63$23.63576,200
2011-07-18$24.32$24.32297,500
2011-07-15$24.60$24.60159,800
2011-07-14$24.79$24.79233,300
2011-07-13$25.09$25.09118,600
2011-07-12$24.94$24.94100,000
2011-07-11$24.90$24.90313,200
2011-07-08$25.21$25.21187,200
2011-07-07$24.91$24.91176,000
2011-07-06$24.22$24.22124,200
2011-07-05$23.99$23.99103,000
2011-07-01$24.04$24.04221,100
2011-06-30$23.56$23.56301,500
2011-06-29$23.13$23.13234,300
2011-06-28$23.18$23.18179,900
2011-06-27$23.19$23.19271,100
2011-06-24$23.18$23.18327,500
2011-06-23$23.80$23.80206,000
2011-06-22$24.12$24.12172,800
2011-06-21$24.65$24.65150,600
2011-06-20$23.97$23.97176,300
2011-06-17$24.20$24.20210,000
2011-06-16$24.28$24.28217,700
2011-06-15$23.78$23.78159,800
2011-06-14$24.15$24.15204,300
2011-06-13$24.62$24.62113,200
2011-06-10$24.41$24.41350,900
2011-06-09$24.38$24.38282,900
2011-06-08$24.33$24.33190,800
2011-06-07$24.60$24.60145,200
2011-06-06$24.75$24.7577,100
2011-06-03$25.32$25.32294,000
2011-06-02$25.92$25.92436,900
2011-06-01$25.42$25.42244,000
2011-05-31$25.59$25.59237,900
2011-05-27$25.89$25.89572,600
2011-05-26$25.81$25.81795,400
2011-05-25$24.22$24.22129,100
2011-05-24$24.01$24.01181,200
2011-05-23$24.79$24.79138,700
2011-05-20$24.80$24.80130,700
2011-05-19$24.56$24.56203,500
2011-05-18$24.87$24.87118,200
2011-05-17$24.93$24.93153,000
2011-05-16$24.33$24.3352,600
2011-05-13$24.59$24.59231,000
2011-05-12$24.29$24.29138,200
2011-05-11$24.50$24.50167,600
2011-05-10$24.77$24.77147,800
2011-05-09$24.63$24.6379,000
2011-05-06$24.20$24.20128,000
2011-05-05$24.02$24.02130,200
2011-05-04$24.13$24.13120,800
2011-05-03$24.16$24.16167,000
2011-05-02$24.37$24.37243,000
2011-04-29$24.56$24.56103,000
2011-04-28$24.45$24.45185,000
2011-04-27$24.51$24.51149,000
2011-04-26$24.56$24.56319,900
2011-04-25$24.05$24.05225,800
2011-04-21$24.39$24.39398,400
2011-04-20$22.85$22.85187,800
2011-04-19$22.74$22.74244,800
2011-04-18$22.92$22.92117,800
2011-04-15$23.42$23.42176,500
2011-04-14$23.15$23.15126,000
2011-04-13$23.02$23.02156,200
2011-04-12$23.00$23.00158,400
2011-04-11$22.77$22.77253,200
2011-04-08$22.96$22.96457,900
2011-04-07$22.90$22.90517,900
2011-04-06$21.49$21.49171,000
2011-04-05$21.49$21.49142,700
2011-04-04$21.48$21.4860,700
2011-04-01$21.18$21.18318,200
2011-03-31$21.59$21.59784,600
2011-03-30$22.05$22.05308,600
2011-03-29$21.85$21.85137,500
2011-03-28$21.69$21.69170,400
2011-03-25$21.46$21.46362,500
2011-03-24$21.09$21.09114,400
2011-03-23$21.05$21.05165,500
2011-03-22$21.07$21.07154,300
2011-03-21$21.00$21.00150,700
2011-03-18$20.43$20.43340,200
2011-03-17$20.90$20.90222,400
2011-03-16$20.48$20.48298,600
2011-03-15$20.94$20.94373,200
2011-03-14$21.07$21.07335,000
2011-03-11$21.06$21.06180,900
2011-03-10$20.94$20.94370,400
2011-03-09$20.76$20.7693,100
2011-03-08$20.86$20.86270,200
2011-03-07$20.16$20.16169,100
2011-03-04$20.15$20.15128,800
2011-03-03$20.28$20.28371,500
2011-03-02$19.81$19.811,093,100
2011-03-01$19.93$19.93958,000
2011-02-28$19.89$19.89993,100
2011-02-25$19.79$19.791,346,900
2011-02-24$19.95$19.952,861,700
2011-02-23$21.96$21.96270,300
2011-02-22$21.99$21.99262,200
2011-02-18$22.15$22.15217,200
2011-02-17$21.88$21.88198,400
2011-02-16$21.99$21.99187,300
2011-02-15$22.15$22.15149,300
2011-02-14$22.16$22.16266,400
2011-02-11$22.06$22.06167,800
2011-02-10$22.11$22.11212,100
2011-02-09$22.10$22.10384,500
2011-02-08$21.86$21.86538,900
2011-02-07$21.86$21.86319,000
2011-02-04$21.81$21.81695,400
2011-02-03$21.90$21.90327,200
2011-02-02$21.90$21.90262,300
2011-02-01$22.60$22.60696,800
2011-01-31$22.27$22.27217,500
2011-01-28$22.59$22.59235,200
2011-01-27$22.91$22.91589,100
2011-01-26$22.78$22.78336,600
2011-01-25$22.83$22.83235,200
2011-01-24$22.95$22.95228,500
2011-01-21$23.00$23.00327,300
2011-01-20$23.51$23.51206,600
2011-01-19$23.24$23.24598,700
2011-01-18$23.41$23.41189,200
2011-01-14$22.95$22.95357,000
2011-01-13$23.47$23.47331,400
2011-01-12$23.34$23.34399,200
2011-01-11$22.63$22.63352,800
2011-01-10$21.93$21.93249,800
2011-01-07$21.76$21.76463,400
2011-01-06$21.96$21.9683,100
2011-01-05$21.86$21.86183,900
2011-01-04$21.85$21.85836,700
2011-01-03$21.87$21.8767,800