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 — 2008

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2008-12-31$19.69$19.69362,000
2008-12-30$18.73$18.73591,700
2008-12-29$17.32$17.32266,000
2008-12-26$18.15$18.15150,900
2008-12-24$18.03$18.03147,500
2008-12-23$17.75$17.75211,500
2008-12-22$18.10$18.10295,400
2008-12-19$18.39$18.391,119,600
2008-12-18$20.10$20.101,150,800
2008-12-17$20.50$20.50549,000
2008-12-16$19.45$19.45671,900
2008-12-15$19.21$19.21995,400
2008-12-12$19.96$19.96911,200
2008-12-11$21.78$21.78338,400
2008-12-10$23.50$23.50270,600
2008-12-09$22.91$22.91536,800
2008-12-08$23.51$23.51541,700
2008-12-05$21.42$21.42169,500
2008-12-04$20.59$20.59416,700
2008-12-03$21.20$21.20527,300
2008-12-02$21.02$21.02579,500
2008-12-01$19.83$19.83771,000
2008-11-28$21.19$21.19240,400
2008-11-26$20.31$20.311,103,200
2008-11-25$20.00$20.00662,200
2008-11-24$19.68$19.68801,700
2008-11-21$17.36$17.36499,500
2008-11-20$15.97$15.97766,400
2008-11-19$17.45$17.45394,000
2008-11-18$18.86$18.86459,900
2008-11-17$18.66$18.66677,000
2008-11-14$18.98$18.98957,600
2008-11-13$20.68$20.68672,900
2008-11-12$20.94$20.94448,100
2008-11-11$22.22$22.22696,200
2008-11-10$23.96$23.96614,700
2008-11-07$25.00$25.00400,200
2008-11-06$23.94$23.94900,800
2008-11-05$25.34$25.34725,700
2008-11-04$26.80$26.80749,000
2008-11-03$26.35$26.35430,600
2008-10-31$25.37$25.37782,500
2008-10-30$25.21$25.21716,700
2008-10-29$23.50$23.501,904,800
2008-10-28$21.54$21.544,051,700
2008-10-27$25.42$25.42392,100
2008-10-24$26.27$26.27862,900
2008-10-23$28.06$28.063,176,100
2008-10-22$30.60$30.60856,300
2008-10-21$32.13$32.131,777,100
2008-10-20$32.44$32.44640,700
2008-10-17$29.40$29.40491,300
2008-10-16$28.30$28.30977,900
2008-10-15$29.34$29.34969,400
2008-10-14$32.78$32.78564,400
2008-10-13$35.90$35.901,143,200
2008-10-10$31.01$31.011,089,300
2008-10-09$30.87$30.87421,500
2008-10-08$34.20$34.20927,200
2008-10-07$34.35$34.35591,900
2008-10-06$36.20$36.20552,500
2008-10-03$37.27$37.27195,000
2008-10-02$37.84$37.84340,200
2008-10-01$37.51$37.51442,800
2008-09-30$38.25$38.25469,200
2008-09-29$37.28$37.28463,700
2008-09-26$39.37$39.37187,400
2008-09-25$39.02$39.02255,800
2008-09-24$40.17$40.17236,000
2008-09-23$41.15$41.15146,500
2008-09-22$40.98$40.98192,200
2008-09-19$40.96$40.96390,000
2008-09-18$41.08$41.08450,500
2008-09-17$43.53$43.53530,800
2008-09-16$43.29$43.29356,900
2008-09-15$42.73$42.73229,400
2008-09-12$42.92$42.92393,600
2008-09-11$42.04$42.04282,900
2008-09-10$40.99$40.99367,000
2008-09-09$38.75$38.75198,100
2008-09-08$40.35$40.3598,500
2008-09-05$39.27$39.27291,700
2008-09-04$39.87$39.87296,800
2008-09-03$41.09$41.09180,700
2008-09-02$41.25$41.25131,800
2008-08-29$40.73$40.73141,700
2008-08-28$41.11$41.11181,000
2008-08-27$41.43$41.43123,400
2008-08-26$40.57$40.57159,200
2008-08-25$41.26$41.26111,800
2008-08-22$41.49$41.49127,900
2008-08-21$40.66$40.66113,200
2008-08-20$41.00$41.00125,700
2008-08-19$41.00$41.00503,500
2008-08-18$41.00$41.00129,000
2008-08-15$41.44$41.44174,500
2008-08-14$41.87$41.87219,000
2008-08-13$43.16$43.16289,200
2008-08-12$41.27$41.27295,400
2008-08-11$44.00$44.00318,000
2008-08-08$43.51$43.51227,600
2008-08-07$42.10$42.10244,000
2008-08-06$41.95$41.95253,400
2008-08-05$41.40$41.40335,400
2008-08-04$40.89$40.89182,400
2008-08-01$40.81$40.81193,400
2008-07-31$40.17$40.17277,600
2008-07-30$40.65$40.65287,200
2008-07-29$39.95$39.95153,800
2008-07-28$39.80$39.80182,600
2008-07-25$39.92$39.92143,200
2008-07-24$40.93$40.93422,600
2008-07-23$41.17$41.17521,000
2008-07-22$41.22$41.22898,600
2008-07-21$38.90$38.90208,800
2008-07-18$37.78$37.78529,200
2008-07-17$39.36$39.36344,000
2008-07-16$38.50$38.50299,400
2008-07-15$38.52$38.52194,200
2008-07-14$37.40$37.40132,800
2008-07-11$37.97$37.97130,800
2008-07-10$37.58$37.58116,600
2008-07-09$38.19$38.19148,600
2008-07-08$37.45$37.45104,600
2008-07-07$36.75$36.75197,200
2008-07-03$36.45$36.45148,000
2008-07-02$36.76$36.76271,600
2008-07-01$37.50$37.50277,600
2008-06-30$37.76$37.76283,200
2008-06-27$38.63$38.63424,200
2008-06-26$38.08$38.08519,200
2008-06-25$38.25$38.25271,600
2008-06-24$37.12$37.12151,000
2008-06-23$37.40$37.40172,600
2008-06-20$36.85$36.8573,600
2008-06-19$36.73$36.73134,400
2008-06-18$35.62$35.6286,600
2008-06-17$35.93$35.93154,600
2008-06-16$36.69$36.69141,200
2008-06-13$36.53$36.53120,000
2008-06-12$36.13$36.13178,400
2008-06-11$36.10$36.10366,800
2008-06-10$35.74$35.74507,400
2008-06-09$34.15$34.15409,400
2008-06-06$35.65$35.65117,600
2008-06-05$35.68$35.68122,600
2008-06-04$35.61$35.61146,800
2008-06-03$35.56$35.56287,000
2008-06-02$35.33$35.33121,000
2008-05-30$35.25$35.25304,200
2008-05-29$36.31$36.31196,600
2008-05-28$35.13$35.13316,000
2008-05-27$36.49$36.4992,800
2008-05-23$36.04$36.04178,200
2008-05-22$36.67$36.67307,200
2008-05-21$37.23$37.23367,000
2008-05-20$37.00$37.00120,200
2008-05-19$36.99$36.99182,600
2008-05-16$36.84$36.84287,400
2008-05-15$36.46$36.46249,800
2008-05-14$36.70$36.70157,200
2008-05-13$36.28$36.28132,400
2008-05-12$36.48$36.48177,800
2008-05-09$36.51$36.51133,400
2008-05-08$36.05$36.05142,400
2008-05-07$36.67$36.67245,400
2008-05-06$36.58$36.58412,000
2008-05-05$37.08$37.08324,000
2008-05-02$36.20$36.20592,800
2008-05-01$35.99$35.99610,000
2008-04-30$36.00$36.00694,200
2008-04-29$35.40$35.401,957,400
2008-04-28$32.79$32.79454,400
2008-04-25$33.15$33.15406,600
2008-04-24$32.92$32.92250,400
2008-04-23$32.58$32.58288,200
2008-04-22$31.62$31.61270,000
2008-04-21$31.05$31.05498,600
2008-04-18$30.37$30.36527,400
2008-04-17$30.34$30.34625,600
2008-04-16$31.30$31.30432,200
2008-04-15$31.58$31.58527,400
2008-04-14$31.75$31.75131,000
2008-04-11$31.39$31.39251,600
2008-04-10$32.00$32.00197,000
2008-04-09$32.15$32.15433,200
2008-04-08$32.25$32.25199,800
2008-04-07$31.67$31.67303,400
2008-04-04$31.71$31.71153,200
2008-04-03$30.67$30.67351,600
2008-04-02$31.04$31.04314,800
2008-04-01$31.55$31.55554,000
2008-03-31$32.45$32.45186,200
2008-03-28$31.89$31.89126,600
2008-03-27$32.61$32.61304,600
2008-03-26$32.74$32.74440,600
2008-03-25$30.63$30.63315,200
2008-03-24$29.81$29.81301,000
2008-03-20$29.75$29.75404,400
2008-03-19$31.17$31.17171,600
2008-03-18$31.81$31.81165,400
2008-03-17$31.50$31.50278,000
2008-03-14$31.91$31.91181,200
2008-03-13$32.79$32.79156,000
2008-03-12$32.38$32.38347,800
2008-03-11$32.22$32.22336,600
2008-03-10$32.99$32.99431,800
2008-03-07$32.80$32.80376,800
2008-03-06$33.58$33.58149,800
2008-03-05$33.71$33.71172,000
2008-03-04$34.06$34.06267,200
2008-03-03$34.22$34.22606,600
2008-02-29$33.05$33.05285,800
2008-02-28$34.17$34.17156,200
2008-02-27$34.43$34.43457,000
2008-02-26$34.88$34.88524,600
2008-02-25$35.33$35.33260,400
2008-02-22$35.00$35.00485,800
2008-02-21$34.82$34.821,730,800
2008-02-20$31.31$31.31176,000
2008-02-19$31.58$31.58239,400
2008-02-15$31.45$31.45135,400
2008-02-14$31.99$31.99369,800
2008-02-13$32.29$32.29332,400
2008-02-12$32.33$32.33400,600
2008-02-11$30.25$30.25212,400
2008-02-08$30.30$30.30189,600
2008-02-07$29.25$29.25352,200
2008-02-06$30.20$30.20264,000
2008-02-05$30.00$30.00223,800
2008-02-04$30.67$30.67194,600
2008-02-01$31.51$31.51198,200
2008-01-31$31.34$31.34169,400
2008-01-30$31.70$31.70154,400
2008-01-29$32.74$32.74269,400
2008-01-28$32.15$32.15131,600
2008-01-25$31.34$31.34184,200
2008-01-24$30.85$30.85114,600
2008-01-23$31.06$31.06535,600
2008-01-22$31.84$31.84564,800
2008-01-18$32.36$32.36425,800
2008-01-17$33.58$33.58624,000
2008-01-16$33.23$33.23183,000
2008-01-15$32.47$32.47313,400
2008-01-14$33.35$33.35138,600
2008-01-11$32.94$32.94400,200
2008-01-10$33.45$33.45373,200
2008-01-09$32.33$32.33283,600
2008-01-08$31.33$31.33154,000
2008-01-07$31.96$31.96242,600
2008-01-04$31.74$31.74230,400
2008-01-03$31.70$31.70204,600
2008-01-02$30.96$30.96213,400