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 — 2026

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$161.0751,800
2026-09-03$159.7640,579
2026-09-02$161.5493,626
2026-09-01$163.6334,910
2026-08-31$170.2544,739
2026-08-28$169.4123,259
2026-08-27$169.72$169.72376,400$169.3225,793
2026-08-26$168.93$168.93414,100$165.4545,565
2026-08-25$168.91$168.91444,900$172.6527,284
2026-08-24$173.48$173.48420,700$171.7135,271
2026-08-21$172.23$172.23391,200$174.6723,936
2026-08-20$174.27$174.27516,300$171.6635,144
2026-08-19$172.49$172.49687,900$169.5381,575
2026-08-18$167.05$167.05556,600$168.5161,665
2026-08-17$169.45$169.45490,000$162.0038,962
2026-08-14$163.15$163.15323,800$166.4024,675
2026-08-13$167.48$167.48442,100$167.9334,573
2026-08-12$167.17$167.17822,300$165.2748,317
2026-08-11$165.58$165.58662,300$164.0254,731
2026-08-10$166.05$166.05516,600$166.0739,710
2026-08-07$164.51$164.51388,400$162.2040,109
2026-08-06$161.17$161.17469,300$161.0049,270
2026-08-05$163.51$163.51617,800$157.9962,618
2026-08-04$156.85$156.851,045,200$156.56127,508
2026-08-03$158.41$158.411,212,100$167.78124,450
2026-07-31$163.57$163.57871,900$168.31123,610
2026-07-30$165.53$165.531,774,100$166.68191,842
2026-07-29$178.18$178.181,572,000$180.25129,679
2026-07-28$180.24$180.241,790,400$177.57125,650
2026-07-27$168.78$168.78778,200$165.0557,313
2026-07-24$165.76$165.76757,700$172.1053,269
2026-07-23$170.32$170.321,282,000$176.97128,482
2026-07-22$167.28$167.28568,100$166.3041,051
2026-07-21$166.62$166.62576,100$163.7359,645
2026-07-20$166.18$166.18703,100$170.7279,261
2026-07-17$170.00$170.00579,600
2026-07-16$170.00$170.00501,800
2026-07-15$172.08$172.08460,300
2026-07-14$167.97$167.97661,100
2026-07-13$166.10$166.10401,600
2026-07-10$167.72$167.72308,500
2026-07-09$168.77$168.77525,300
2026-07-08$165.47$165.47653,800
2026-07-07$168.72$168.72665,500
2026-07-06$170.94$170.94777,200
2026-07-02$173.06$173.06938,200
2026-07-01$175.05$175.05809,200
2026-06-30$173.71$173.711,067,800
2026-06-29$172.99$172.991,359,700
2026-06-26$169.86$169.861,443,200
2026-06-25$160.96$160.962,251,000
2026-06-24$158.17$158.172,406,500
2026-06-23$142.67$142.67696,200
2026-06-22$140.73$140.73918,700
2026-06-18$146.00$146.00870,100
2026-06-17$143.27$143.27989,800
2026-06-16$143.54$143.54568,500
2026-06-15$147.72$147.72598,000
2026-06-12$146.18$146.18703,900
2026-06-11$149.92$149.92790,300
2026-06-10$144.59$144.591,014,500
2026-06-09$151.82$151.821,220,500
2026-06-08$152.24$152.241,129,000
2026-06-05$149.45$149.451,348,900
2026-06-04$152.80$152.801,689,900
2026-06-03$143.90$143.901,380,500
2026-06-02$137.54$137.541,244,100
2026-06-01$138.03$138.031,308,100
2026-05-29$136.07$136.071,581,300
2026-05-28$136.80$136.803,417,900
2026-05-27$118.45$118.451,760,000
2026-05-26$113.85$113.85996,400
2026-05-22$116.78$116.78383,700
2026-05-21$116.57$116.57371,700
2026-05-20$115.09$115.09859,100
2026-05-19$113.55$113.55967,100
2026-05-18$113.78$113.78567,500
2026-05-15$116.38$116.38643,400
2026-05-14$117.09$117.091,184,800
2026-05-13$117.38$117.38641,100
2026-05-12$121.94$121.94803,700
2026-05-11$118.96$118.96824,500
2026-05-08$124.49$124.49681,200
2026-05-07$125.00$125.001,121,600
2026-05-06$124.13$124.131,230,800
2026-05-05$121.32$121.321,594,500
2026-05-04$111.97$111.97781,100
2026-05-01$112.85$112.851,000,900
2026-04-30$118.33$118.331,561,200
2026-04-29$116.17$116.174,097,200
2026-04-28$102.49$102.491,580,300
2026-04-27$103.21$103.213,350,300
2026-04-24$102.17$102.171,802,000
2026-04-23$106.34$106.342,320,400
2026-04-22$115.43$115.431,164,500
2026-04-21$115.18$115.181,023,900
2026-04-20$117.12$117.12995,000
2026-04-17$119.68$119.681,175,700
2026-04-16$115.58$115.581,139,200
2026-04-15$116.50$116.501,356,600
2026-04-14$113.06$113.06899,400
2026-04-13$110.37$110.37951,000
2026-04-10$106.81$106.81669,600
2026-04-09$106.70$106.70693,000
2026-04-08$106.54$106.54784,700
2026-04-07$107.16$107.16536,600
2026-04-06$109.62$109.62633,400
2026-04-02$114.19$114.19661,200
2026-04-01$111.42$111.42798,200
2026-03-31$110.66$110.661,189,800
2026-03-30$105.10$105.101,089,600
2026-03-27$102.08$102.081,045,800
2026-03-26$103.08$103.08846,800
2026-03-25$99.99$99.99557,700
2026-03-24$101.28$101.28778,700
2026-03-23$100.35$100.35802,800
2026-03-20$99.70$99.701,375,300
2026-03-19$98.05$98.05689,000
2026-03-18$97.14$97.141,164,300
2026-03-17$100.49$100.49874,100
2026-03-16$97.61$97.611,059,400
2026-03-13$98.33$98.33970,100
2026-03-12$97.45$97.451,146,400
2026-03-11$105.38$105.38791,300
2026-03-10$106.62$106.621,353,400
2026-03-09$110.03$110.031,051,800
2026-03-06$107.20$107.201,393,400
2026-03-05$110.60$110.601,330,100
2026-03-04$110.20$110.201,027,000
2026-03-03$108.70$108.701,225,600
2026-03-02$108.27$108.271,772,000
2026-02-27$108.14$108.141,383,300
2026-02-26$106.13$106.131,396,500
2026-02-25$101.00$101.001,138,400
2026-02-24$104.09$104.091,287,100
2026-02-23$104.66$104.662,454,600
2026-02-20$99.70$99.701,642,900
2026-02-19$98.41$98.412,217,600
2026-02-18$96.50$96.503,163,300
2026-02-17$88.62$88.625,243,400
2026-02-13$93.00$93.0014,188,100
2026-02-12$80.08$80.0823,558,100
2026-02-11$133.14$133.143,494,900
2026-02-10$144.55$144.551,515,300
2026-02-09$154.57$154.571,316,700
2026-02-06$150.59$150.591,775,700
2026-02-05$145.39$145.391,363,300
2026-02-04$163.11$163.111,858,500
2026-02-03$167.91$167.91927,300
2026-02-02$178.59$178.591,107,700
2026-01-30$180.25$180.25961,800
2026-01-29$185.89$185.89555,400
2026-01-28$186.32$186.32408,200
2026-01-27$187.97$187.97591,600
2026-01-26$187.42$187.42502,300
2026-01-23$186.70$186.70515,800
2026-01-22$186.74$186.74542,500
2026-01-21$184.87$184.871,186,100
2026-01-20$176.57$176.57750,300
2026-01-16$182.61$182.611,397,300
2026-01-15$182.56$182.56692,600
2026-01-14$184.77$184.77785,100
2026-01-13$183.29$183.29868,200
2026-01-12$180.15$180.15887,000
2026-01-09$181.38$181.381,433,900
2026-01-08$188.22$188.223,340,800
2026-01-07$202.92$202.92706,300
2026-01-06$201.48$201.481,132,200
2026-01-05$197.58$197.581,138,600
2026-01-02$188.67$188.67677,600