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 — 1998

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1998-12-31$8.38$8.38161,200——
1998-12-30$8.38$8.38520,800——
1998-12-29$8.63$8.6375,200——
1998-12-28$8.81$8.8118,000——
1998-12-24$8.38$8.381,200——
1998-12-23$8.31$8.31218,000——
1998-12-22$8.63$8.6394,800——
1998-12-21$8.00$8.00108,400——
1998-12-18$7.97$7.97165,600——
1998-12-17$7.97$7.974,800——
1998-12-16$7.72$7.72545,600——
1998-12-15$7.38$7.3820,800——
1998-12-14$7.34$7.3442,800——
1998-12-11$7.25$7.25800——
1998-12-10$7.19$7.19206,800——
1998-12-09$7.38$7.3876,000——
1998-12-08$7.22$7.2234,000——
1998-12-07$7.13$7.13800——
1998-12-04$7.25$7.2528,400——
1998-12-03$7.22$7.221,600——
1998-12-02$7.16$7.1648,000——
1998-12-01$7.38$7.3850,400——
1998-11-30$7.09$7.0942,800——
1998-11-27$7.25$7.257,600——
1998-11-25$7.25$7.2510,000——
1998-11-24$7.09$7.093,600——
1998-11-23$7.13$7.1320,400——
1998-11-20$7.06$7.06550,800——
1998-11-19$6.75$6.751,200——
1998-11-18$6.81$6.81128,800——
1998-11-17$6.91$6.91286,000——
1998-11-16$6.88$6.883,600——
1998-11-13$6.94$6.94398,400——
1998-11-12$6.75$6.7532,400——
1998-11-11$7.06$7.06400——
1998-11-10$7.06$7.06226,400——
1998-11-09$7.00$7.00221,200——
1998-11-06$7.16$7.1653,200——
1998-11-05$7.09$7.0936,000——
1998-11-04$7.03$7.03262,000——
1998-11-03$6.91$6.9156,400——
1998-11-02$6.97$6.973,200——
1998-10-30$7.00$7.00457,200——
1998-10-29$6.78$6.78778,800——
1998-10-28$7.31$7.312,800——
1998-10-27$7.69$7.6938,400——
1998-10-26$7.69$7.69182,000——
1998-10-23$7.38$7.3895,600——
1998-10-22$7.41$7.41238,400——
1998-10-21$7.25$7.25102,800——
1998-10-20$7.09$7.09107,200——
1998-10-19$7.19$7.194,000——
1998-10-16$6.97$6.9723,200——
1998-10-15$7.38$7.38380,000——
1998-10-14$7.13$7.1326,000——
1998-10-13$7.25$7.2586,800——
1998-10-12$7.16$7.16187,200——
1998-10-09$6.50$6.5051,600——
1998-10-08$6.34$6.34152,400——
1998-10-07$6.41$6.41222,000——
1998-10-06$6.86$6.8643,200——
1998-10-05$7.03$7.0350,000——
1998-10-02$7.31$7.3126,400——
1998-10-01$6.94$6.94120,000——
1998-09-30$8.16$8.1670,800——
1998-09-29$8.50$8.50186,800——
1998-09-28$8.81$8.81116,000——
1998-09-25$8.44$8.4420,800——
1998-09-24$8.25$8.25180,000——
1998-09-23$8.22$8.2282,400——
1998-09-22$7.98$7.9880,800——
1998-09-21$7.53$7.5325,200——
1998-09-18$7.53$7.53183,600——
1998-09-17$7.19$7.190——
1998-09-16$7.19$7.1971,600——
1998-09-15$6.84$6.8476,400——
1998-09-14$7.08$7.0827,200——
1998-09-11$6.84$6.840——
1998-09-10$6.84$6.846,400——
1998-09-09$6.88$6.8810,400——
1998-09-08$7.11$7.1171,600——
1998-09-04$6.97$6.9711,200——
1998-09-03$7.03$7.0385,600——
1998-09-02$7.25$7.25394,400——
1998-09-01$6.88$6.88152,800——
1998-08-31$6.66$6.66192,800——
1998-08-28$7.58$7.58446,400——
1998-08-27$7.78$7.78376,000——
1998-08-26$7.75$7.75102,400——
1998-08-25$7.84$7.8488,800——
1998-08-24$7.94$7.94413,200——
1998-08-21$7.41$7.41159,600——
1998-08-20$7.59$7.59149,200——
1998-08-19$6.91$6.91185,600——
1998-08-18$6.75$6.7511,600——
1998-08-17$6.91$6.91166,800——
1998-08-14$7.00$7.0069,200——
1998-08-13$6.94$6.9410,400——
1998-08-12$7.25$7.25125,600——
1998-08-11$7.00$7.0069,200——
1998-08-10$7.59$7.5921,600——
1998-08-07$7.59$7.5946,800——
1998-08-06$7.69$7.697,600——
1998-08-05$7.69$7.69267,200——
1998-08-04$7.69$7.69185,600——
1998-08-03$7.81$7.8118,000——
1998-07-31$7.81$7.81368,400——
1998-07-30$7.84$7.848,800——
1998-07-29$7.63$7.6375,200——
1998-07-28$7.56$7.5679,200——
1998-07-27$7.56$7.56108,400——
1998-07-24$7.56$7.5644,000——
1998-07-23$7.56$7.56269,600——
1998-07-22$7.41$7.41709,600——
1998-07-21$7.31$7.31332,000——
1998-07-20$7.13$7.13590,000——
1998-07-17$6.69$6.6965,200——
1998-07-16$6.44$6.44448,000——
1998-07-15$6.69$6.6916,000——
1998-07-14$6.64$6.64118,400——
1998-07-13$6.63$6.6330,800——
1998-07-10$6.75$6.75230,000——
1998-07-09$6.63$6.63258,800——
1998-07-08$6.75$6.7556,400——
1998-07-07$6.59$6.59201,600——
1998-07-06$6.75$6.75328,400——
1998-07-02$6.16$6.16298,800——
1998-07-01$6.22$6.22375,600——
1998-06-30$6.31$6.3138,800——
1998-06-29$6.31$6.31252,800——
1998-06-26$6.47$6.47203,600——
1998-06-25$6.44$6.44470,000——
1998-06-24$6.50$6.50284,400——
1998-06-23$6.22$6.22528,800——
1998-06-22$6.22$6.22374,000——
1998-06-19$6.22$6.22188,400——
1998-06-18$6.50$6.50101,600——
1998-06-17$6.69$6.69260,400——
1998-06-16$6.92$6.92105,200——
1998-06-15$6.89$6.89407,200——
1998-06-12$7.06$7.0647,200——
1998-06-11$7.00$7.00264,000——
1998-06-10$7.08$7.08547,200——
1998-06-09$7.00$7.00199,200——
1998-06-08$6.75$6.75487,200——
1998-06-05$6.31$6.31109,600——
1998-06-04$6.19$6.1976,000——
1998-06-03$6.31$6.31288,800——
1998-06-02$6.31$6.31336,800——
1998-06-01$6.38$6.38494,000——
1998-05-29$6.38$6.38225,600——
1998-05-28$6.03$6.03196,000——
1998-05-27$5.98$5.98864,000——
1998-05-26$6.22$6.22468,000——
1998-05-22$6.19$6.19199,200——
1998-05-21$6.19$6.191,262,400——
1998-05-20$6.19$6.19451,200——
1998-05-19$6.28$6.281,376,400——
1998-05-18$6.13$6.132,134,000——
1998-05-15$6.36$6.3612,074,000——