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 — 2003

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2003-12-31$10.90$10.90107,200
2003-12-30$10.58$10.58162,000
2003-12-29$10.65$10.6556,800
2003-12-26$10.71$10.7115,600
2003-12-24$10.87$10.878,400
2003-12-23$10.92$10.92251,200
2003-12-22$11.00$11.0098,000
2003-12-19$10.89$10.8967,200
2003-12-18$11.05$11.05154,400
2003-12-17$10.72$10.72151,600
2003-12-16$10.81$10.81252,800
2003-12-15$11.03$11.03234,400
2003-12-12$10.86$10.8672,000
2003-12-11$10.73$10.7388,400
2003-12-10$10.70$10.7084,000
2003-12-09$10.77$10.7788,400
2003-12-08$10.94$10.9448,000
2003-12-05$11.01$11.01102,800
2003-12-04$10.86$10.8697,200
2003-12-03$10.97$10.97150,400
2003-12-02$10.77$10.7782,400
2003-12-01$10.84$10.84201,200
2003-11-28$10.48$10.4817,200
2003-11-26$10.50$10.50124,400
2003-11-25$10.37$10.3788,000
2003-11-24$10.10$10.10144,800
2003-11-21$9.58$9.58307,200
2003-11-20$10.20$10.20346,800
2003-11-19$10.39$10.39114,800
2003-11-18$10.39$10.39394,000
2003-11-17$10.48$10.48326,800
2003-11-14$10.38$10.38227,600
2003-11-13$10.46$10.4645,200
2003-11-12$10.50$10.50175,600
2003-11-11$10.40$10.40352,400
2003-11-10$10.55$10.55352,400
2003-11-07$10.91$10.91255,200
2003-11-06$10.63$10.6389,200
2003-11-05$10.80$10.8070,400
2003-11-04$10.69$10.69107,600
2003-11-03$10.73$10.73292,000
2003-10-31$10.68$10.68207,600
2003-10-30$10.54$10.54609,600
2003-10-29$10.36$10.36253,600
2003-10-28$9.83$9.8352,000
2003-10-27$9.55$9.55104,000
2003-10-24$9.38$9.38177,600
2003-10-23$9.59$9.59122,400
2003-10-22$9.67$9.67173,200
2003-10-21$9.82$9.82154,400
2003-10-20$10.00$10.00115,600
2003-10-17$9.79$9.79225,200
2003-10-16$9.88$9.88212,800
2003-10-15$9.90$9.90112,400
2003-10-14$9.94$9.9496,800
2003-10-13$10.00$10.00313,200
2003-10-10$9.95$9.95126,800
2003-10-09$9.88$9.88150,400
2003-10-08$9.93$9.93467,600
2003-10-07$9.99$9.99279,600
2003-10-06$10.08$10.08421,600
2003-10-03$10.00$10.00461,600
2003-10-02$9.88$9.88189,200
2003-10-01$9.79$9.79552,400
2003-09-30$9.42$9.42876,400
2003-09-29$8.66$8.66163,200
2003-09-26$8.30$8.30519,600
2003-09-25$8.32$8.32358,400
2003-09-24$8.86$8.86395,600
2003-09-23$8.81$8.81187,200
2003-09-22$8.88$8.8849,600
2003-09-19$8.97$8.9775,600
2003-09-18$8.95$8.9599,600
2003-09-17$8.90$8.9052,000
2003-09-16$8.95$8.9548,400
2003-09-15$8.94$8.94100,800
2003-09-12$8.96$8.96148,400
2003-09-11$8.88$8.88234,000
2003-09-10$8.89$8.89245,600
2003-09-09$9.00$9.00348,800
2003-09-08$9.16$9.1659,600
2003-09-05$9.15$9.15116,000
2003-09-04$9.09$9.09168,000
2003-09-03$9.25$9.25228,800
2003-09-02$9.25$9.25426,800
2003-08-29$9.19$9.19329,200
2003-08-28$9.10$9.1050,400
2003-08-27$9.00$9.0028,800
2003-08-26$9.00$9.00106,000
2003-08-25$9.00$9.00244,800
2003-08-22$8.80$8.80132,800
2003-08-21$8.87$8.87646,000
2003-08-20$8.69$8.69386,400
2003-08-19$8.52$8.52268,400
2003-08-18$8.36$8.36116,000
2003-08-15$8.28$8.2860,800
2003-08-14$8.21$8.21386,800
2003-08-13$8.16$8.16328,000
2003-08-12$8.22$8.22478,800
2003-08-11$8.38$8.38447,600
2003-08-08$8.23$8.23503,600
2003-08-07$8.10$8.104,717,600
2003-08-06$8.41$8.41538,800
2003-08-05$8.09$8.091,288,800
2003-08-04$8.25$8.25255,200
2003-08-01$8.49$8.49120,000
2003-07-31$8.71$8.71120,400
2003-07-30$8.74$8.74161,200
2003-07-29$8.58$8.58289,200
2003-07-28$8.38$8.38540,800
2003-07-25$8.06$8.06316,000
2003-07-24$8.19$8.19828,000
2003-07-23$9.13$9.13516,800
2003-07-22$8.55$8.55462,400
2003-07-21$8.23$8.23226,000
2003-07-18$7.79$7.79249,600
2003-07-17$7.54$7.54559,200
2003-07-16$8.31$8.31316,800
2003-07-15$8.25$8.25578,000
2003-07-14$8.21$8.21761,600
2003-07-11$7.61$7.6128,000
2003-07-10$7.59$7.59102,000
2003-07-09$7.81$7.81136,800
2003-07-08$7.76$7.76104,000
2003-07-07$7.78$7.78234,800
2003-07-03$7.47$7.47134,800
2003-07-02$7.60$7.6036,000
2003-07-01$7.90$7.90223,600
2003-06-30$7.96$7.96144,400
2003-06-27$7.69$7.68212,000
2003-06-26$7.66$7.66226,400
2003-06-25$7.68$7.68267,600
2003-06-24$7.38$7.3896,400
2003-06-23$7.27$7.27115,600
2003-06-20$7.00$7.0079,600
2003-06-19$7.21$7.2158,800
2003-06-18$6.92$6.92267,600
2003-06-17$6.88$6.8852,400
2003-06-16$6.80$6.8081,200
2003-06-13$6.65$6.6555,600
2003-06-12$6.79$6.7990,400
2003-06-11$6.75$6.75386,400
2003-06-10$6.71$6.7165,200
2003-06-09$6.66$6.6639,200
2003-06-06$6.93$6.93189,200
2003-06-05$6.94$6.94148,800
2003-06-04$6.69$6.69144,000
2003-06-03$6.50$6.5032,400
2003-06-02$6.76$6.7639,600
2003-05-30$6.85$6.8521,200
2003-05-29$6.84$6.8459,600
2003-05-28$7.00$7.00212,000
2003-05-27$7.07$7.0771,600
2003-05-23$7.05$7.05146,800
2003-05-22$6.97$6.9770,000
2003-05-21$7.17$7.17846,400
2003-05-20$6.84$6.84126,000
2003-05-19$6.62$6.62108,800
2003-05-16$6.63$6.63141,600
2003-05-15$6.62$6.62209,200
2003-05-14$6.25$6.25124,800
2003-05-13$6.35$6.35195,600
2003-05-12$6.16$6.16266,400
2003-05-09$6.29$6.2986,400
2003-05-08$6.38$6.38107,200
2003-05-07$6.57$6.5725,600
2003-05-06$6.52$6.5238,400
2003-05-05$6.66$6.6656,800
2003-05-02$6.64$6.6480,800
2003-05-01$6.43$6.4321,200
2003-04-30$6.48$6.4839,600
2003-04-29$6.16$6.16147,600
2003-04-28$6.13$6.13129,600
2003-04-25$6.13$6.13161,600
2003-04-24$6.16$6.1653,200
2003-04-23$6.36$6.36418,000
2003-04-22$6.25$6.2556,800
2003-04-21$6.29$6.2973,600
2003-04-17$6.29$6.29252,400
2003-04-16$6.36$6.36115,200
2003-04-15$6.30$6.30123,200
2003-04-14$6.13$6.13411,200
2003-04-11$6.08$6.0874,400
2003-04-10$6.05$6.05301,200
2003-04-09$5.71$5.71179,600
2003-04-08$5.75$5.75150,000
2003-04-07$5.63$5.6370,400
2003-04-04$5.63$5.63341,200
2003-04-03$5.66$5.66269,200
2003-04-02$5.62$5.621,101,200
2003-04-01$5.34$5.34270,800
2003-03-31$5.95$5.95518,400
2003-03-28$6.53$6.53121,600
2003-03-27$6.37$6.3754,800
2003-03-26$6.40$6.4061,200
2003-03-25$6.44$6.4447,600
2003-03-24$6.26$6.26135,200
2003-03-21$6.25$6.25351,600
2003-03-20$6.21$6.21198,400
2003-03-19$6.13$6.13136,800
2003-03-18$6.41$6.4199,600
2003-03-17$6.32$6.32288,400
2003-03-14$6.39$6.39161,200
2003-03-13$6.38$6.38162,400
2003-03-12$6.37$6.3729,200
2003-03-11$6.35$6.35126,800
2003-03-10$6.44$6.44221,200
2003-03-07$6.43$6.43170,000
2003-03-06$6.46$6.4619,200
2003-03-05$6.44$6.44108,000
2003-03-04$6.38$6.3816,800
2003-03-03$6.50$6.5061,600
2003-02-28$6.50$6.5065,200
2003-02-27$6.50$6.50130,000
2003-02-26$6.51$6.51200,800
2003-02-25$6.31$6.3177,600
2003-02-24$6.32$6.3227,600
2003-02-21$6.36$6.36893,600
2003-02-20$6.13$6.1312,800
2003-02-19$6.12$6.12102,000
2003-02-18$6.06$6.06435,600
2003-02-14$6.01$6.0186,000
2003-02-13$6.00$6.00114,400
2003-02-12$6.09$6.0943,200
2003-02-11$6.23$6.23199,200
2003-02-10$6.25$6.25121,600
2003-02-07$6.20$6.2075,200
2003-02-06$6.04$6.04136,400
2003-02-05$6.20$6.20374,800
2003-02-04$6.31$6.31207,600
2003-02-03$6.51$6.51818,800
2003-01-31$7.00$7.00162,000
2003-01-30$7.19$7.1948,800
2003-01-29$7.23$7.23108,800
2003-01-28$7.21$7.2172,000
2003-01-27$7.07$7.0757,600
2003-01-24$6.98$6.9821,200
2003-01-23$7.12$7.12490,400
2003-01-22$7.13$7.13152,000
2003-01-21$7.00$7.00132,800
2003-01-17$7.39$7.38118,400
2003-01-16$7.44$7.44127,200
2003-01-15$7.36$7.36114,400
2003-01-14$7.50$7.50276,000
2003-01-13$7.66$7.66202,400
2003-01-10$7.80$7.80214,400
2003-01-09$7.85$7.85752,000
2003-01-08$8.20$8.20627,200
2003-01-07$7.49$7.49416,400
2003-01-06$6.88$6.8866,000
2003-01-03$6.82$6.82183,200
2003-01-02$7.01$7.01248,000