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 — 2019

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2019-12-31$172.23$172.23215,500——
2019-12-30$170.60$170.60155,800——
2019-12-27$171.88$171.88128,800——
2019-12-26$171.78$171.78121,000——
2019-12-24$170.56$170.5678,600——
2019-12-23$170.92$170.92360,000——
2019-12-20$171.39$171.39250,700——
2019-12-19$168.67$168.67225,000——
2019-12-18$166.12$166.12400,200——
2019-12-17$165.22$165.22508,400——
2019-12-16$163.24$163.24337,400——
2019-12-13$159.31$159.31289,900——
2019-12-12$161.57$161.57168,100——
2019-12-11$161.73$161.73262,500——
2019-12-10$162.20$162.20208,700——
2019-12-09$161.23$161.23135,200——
2019-12-06$162.90$162.90121,900——
2019-12-05$161.40$161.40218,000——
2019-12-04$162.85$162.85214,700——
2019-12-03$160.29$160.29292,900——
2019-12-02$163.29$163.29934,200——
2019-11-29$163.16$163.16296,800——
2019-11-27$163.55$163.55283,300——
2019-11-26$160.76$160.76201,600——
2019-11-25$159.65$159.65282,300——
2019-11-22$156.20$156.20200,400——
2019-11-21$155.15$155.15306,700——
2019-11-20$156.39$156.39235,800——
2019-11-19$155.43$155.43226,700——
2019-11-18$154.01$154.01284,400——
2019-11-15$154.59$154.59217,400——
2019-11-14$152.42$152.42173,900——
2019-11-13$150.30$150.30253,700——
2019-11-12$147.24$147.24253,900——
2019-11-11$146.18$146.18102,500——
2019-11-08$145.91$145.91183,700——
2019-11-07$145.28$145.28246,000——
2019-11-06$149.75$149.75273,200——
2019-11-05$149.53$149.53329,500——
2019-11-04$151.62$151.62136,300——
2019-11-01$150.31$150.31319,500——
2019-10-31$146.90$146.90182,300——
2019-10-30$150.03$150.03242,200——
2019-10-29$151.25$151.25205,500——
2019-10-28$149.57$149.57263,300——
2019-10-25$148.91$148.91285,700——
2019-10-24$146.23$146.23529,700——
2019-10-23$139.95$139.95291,300——
2019-10-22$139.69$139.69258,200——
2019-10-21$139.48$139.48205,000——
2019-10-18$141.99$141.99226,200——
2019-10-17$142.04$142.04185,200——
2019-10-16$142.14$142.14318,800——
2019-10-15$141.02$141.02296,500——
2019-10-14$140.64$140.64268,600——
2019-10-11$142.18$142.18257,600——
2019-10-10$142.47$142.47558,000——
2019-10-09$146.96$146.96170,800——
2019-10-08$144.75$144.75282,700——
2019-10-07$148.10$148.10170,500——
2019-10-04$147.86$147.86289,200——
2019-10-03$144.66$144.66268,900——
2019-10-02$143.09$143.09259,700——
2019-10-01$143.42$143.42270,500——
2019-09-30$147.34$147.34171,700——
2019-09-27$147.29$147.29252,300——
2019-09-26$148.68$148.68225,700——
2019-09-25$151.89$151.89197,800——
2019-09-24$153.80$153.80200,300——
2019-09-23$155.03$155.03200,700——
2019-09-20$154.72$154.72205,200——
2019-09-19$153.18$153.18177,700——
2019-09-18$151.77$151.77138,500——
2019-09-17$150.66$150.6661,600——
2019-09-16$150.44$150.44193,100——
2019-09-13$149.92$149.92190,400——
2019-09-12$149.54$149.54213,000——
2019-09-11$147.06$147.06330,400——
2019-09-10$146.89$146.89320,600——
2019-09-09$152.12$152.12213,000——
2019-09-06$155.55$155.55149,400——
2019-09-05$155.98$155.98174,400——
2019-09-04$155.41$155.41236,100——
2019-09-03$155.50$155.50292,500——
2019-08-30$154.19$154.19292,900——
2019-08-29$154.81$154.81177,600——
2019-08-28$154.20$154.20161,500——
2019-08-27$154.28$154.28126,800——
2019-08-26$154.23$154.23112,400——
2019-08-23$153.41$153.41133,700——
2019-08-22$156.31$156.31126,600——
2019-08-21$155.57$155.57208,000——
2019-08-20$156.72$156.72220,500——
2019-08-19$157.37$157.37118,800——
2019-08-16$157.17$157.17141,800——
2019-08-15$155.13$155.13173,300——
2019-08-14$153.35$153.35235,900——
2019-08-13$156.03$156.03279,200——
2019-08-12$155.50$155.50258,700——
2019-08-09$156.21$156.21126,900——
2019-08-08$157.04$157.04267,500——
2019-08-07$153.69$153.69205,100——
2019-08-06$153.54$153.54281,100——
2019-08-05$150.29$150.29320,200——
2019-08-02$154.41$154.41192,600——
2019-08-01$154.81$154.81322,800——
2019-07-31$156.17$156.17193,400——
2019-07-30$158.03$158.03165,000——
2019-07-29$158.12$158.12239,500——
2019-07-26$161.10$161.10494,000——
2019-07-25$161.41$161.41414,000——
2019-07-24$156.42$156.42255,200——
2019-07-23$154.44$154.44264,400——
2019-07-22$153.67$153.67251,200——
2019-07-19$152.63$152.63321,400——
2019-07-18$152.64$152.64223,200——
2019-07-17$150.69$150.69104,100——
2019-07-16$150.12$150.12147,200——
2019-07-15$150.79$150.79132,500——
2019-07-12$149.04$149.04111,800——
2019-07-11$149.69$149.69168,800——
2019-07-10$149.93$149.93301,000——
2019-07-09$152.10$152.10132,200——
2019-07-08$152.40$152.40141,400——
2019-07-05$154.31$154.31105,600——
2019-07-03$155.35$155.35112,800——
2019-07-02$154.41$154.41220,900——
2019-07-01$153.93$153.93449,600——
2019-06-28$153.97$153.97350,800——
2019-06-27$151.69$151.69351,200——
2019-06-26$150.00$150.00400,000——
2019-06-25$147.96$147.96315,300——
2019-06-24$148.37$148.37158,700——
2019-06-21$147.64$147.64492,400——
2019-06-20$146.72$146.72361,800——
2019-06-19$147.55$147.55138,700——
2019-06-18$145.09$145.09103,300——
2019-06-17$144.76$144.76226,500——
2019-06-14$142.91$142.91349,200——
2019-06-13$145.04$145.04248,300——
2019-06-12$142.77$142.77212,800——
2019-06-11$142.49$142.49300,500——
2019-06-10$145.11$145.11149,300——
2019-06-07$144.87$144.87281,200——
2019-06-06$142.10$142.10188,500——
2019-06-05$142.28$142.28202,800——
2019-06-04$141.97$141.97238,800——
2019-06-03$140.39$140.39254,700——
2019-05-31$141.56$141.56199,600——
2019-05-30$141.24$141.24238,500——
2019-05-29$140.09$140.09305,900——
2019-05-28$139.03$139.03356,900——
2019-05-24$140.90$140.90192,400——
2019-05-23$138.52$138.52148,300——
2019-05-22$139.35$139.35346,900——
2019-05-21$138.02$138.02251,800——
2019-05-20$137.28$137.28215,500——
2019-05-17$137.47$137.47168,500——
2019-05-16$141.02$141.02191,100——
2019-05-15$138.56$138.56192,600——
2019-05-14$136.08$136.08240,700——
2019-05-13$135.64$135.64503,000——
2019-05-10$139.73$139.73420,400——
2019-05-09$138.00$138.00445,100——
2019-05-08$137.90$137.90363,500——
2019-05-07$137.37$137.37361,000——
2019-05-06$141.27$141.27197,200——
2019-05-03$142.66$142.66250,500——
2019-05-02$141.64$141.64389,600——
2019-05-01$134.47$134.47323,500——
2019-04-30$136.58$136.58300,400——
2019-04-29$137.07$137.07315,700——
2019-04-26$137.39$137.39240,700——
2019-04-25$136.92$136.92216,900——
2019-04-24$134.67$134.67260,800——
2019-04-23$135.05$135.05304,200——
2019-04-22$129.99$129.99780,700——
2019-04-18$130.97$130.97214,600——
2019-04-17$130.88$130.88280,400——
2019-04-16$133.19$133.19204,500——
2019-04-15$136.97$136.97150,100——
2019-04-12$137.09$137.09161,300——
2019-04-11$137.26$137.26190,400——
2019-04-10$138.49$138.49177,200——
2019-04-09$138.05$138.05191,500——
2019-04-08$139.43$139.43142,800——
2019-04-05$139.26$139.26128,800——
2019-04-04$139.38$139.38323,900——
2019-04-03$138.19$138.19214,200——
2019-04-02$138.60$138.60270,900——
2019-04-01$138.29$138.29206,800——
2019-03-29$136.58$136.58212,400——
2019-03-28$134.28$134.28119,500——
2019-03-27$132.72$132.72112,100——
2019-03-26$135.16$135.16196,900——
2019-03-25$133.62$133.62185,000——
2019-03-22$132.88$132.88194,700——
2019-03-21$136.75$136.75258,700——
2019-03-20$136.67$136.67336,100——
2019-03-19$134.97$134.97331,700——
2019-03-18$133.88$133.88528,900——
2019-03-15$134.64$134.641,322,400——
2019-03-14$132.23$132.23576,100——
2019-03-13$132.44$132.44495,600——
2019-03-12$131.73$131.73497,300——
2019-03-11$131.95$131.95540,300——
2019-03-08$128.28$128.28535,700——
2019-03-07$130.07$130.07528,800——
2019-03-06$133.64$133.64212,200——
2019-03-05$137.57$137.57479,900——
2019-03-04$138.49$138.49200,600——
2019-03-01$140.38$140.38411,500——
2019-02-28$139.98$139.98426,900——
2019-02-27$144.86$144.86362,600——
2019-02-26$142.68$142.68351,400——
2019-02-25$146.95$146.95255,300——
2019-02-22$145.19$145.19217,600——
2019-02-21$142.15$142.15374,600——
2019-02-20$145.92$145.92241,600——
2019-02-19$145.28$145.28193,700——
2019-02-15$145.05$145.05230,500——
2019-02-14$144.08$144.08242,900——
2019-02-13$143.20$143.20136,900——
2019-02-12$140.91$140.91226,000——
2019-02-11$138.76$138.76284,100——
2019-02-08$139.37$139.37202,200——
2019-02-07$139.85$139.85225,800——
2019-02-06$141.70$141.70105,600——
2019-02-05$141.42$141.42430,800——
2019-02-04$141.96$141.96187,100——
2019-02-01$141.47$141.47347,100——
2019-01-31$139.88$139.88178,700——
2019-01-30$138.79$138.79219,400——
2019-01-29$136.10$136.10212,400——
2019-01-28$134.91$134.91178,000——
2019-01-25$135.60$135.60281,000——
2019-01-24$131.94$131.94335,700——
2019-01-23$132.62$132.62188,200——
2019-01-22$132.28$132.28292,000——
2019-01-18$133.18$133.18310,700——
2019-01-17$133.42$133.42367,300——
2019-01-16$133.80$133.80308,700——
2019-01-15$136.32$136.32221,400——
2019-01-14$134.13$134.13129,000——
2019-01-11$135.25$135.25164,200——
2019-01-10$135.21$135.21205,300——
2019-01-09$132.51$132.51184,400——
2019-01-08$131.70$131.70466,900——
2019-01-07$124.22$124.22472,300——
2019-01-04$123.64$123.64508,000——
2019-01-03$121.30$121.30543,000——
2019-01-02$127.74$127.74384,800——