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 — 2018

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2018-12-31$129.21$129.21159,100
2018-12-28$127.15$127.15193,000
2018-12-27$125.67$125.67339,400
2018-12-26$126.38$126.38248,000
2018-12-24$119.37$119.3788,400
2018-12-21$121.91$121.91424,000
2018-12-20$125.93$125.93360,000
2018-12-19$130.97$130.97283,600
2018-12-18$130.44$130.44233,400
2018-12-17$129.91$129.91215,500
2018-12-14$133.50$133.50221,200
2018-12-13$136.21$136.21342,900
2018-12-12$138.11$138.11296,500
2018-12-11$138.22$138.22288,300
2018-12-10$139.06$139.06272,100
2018-12-07$139.63$139.63563,600
2018-12-06$141.96$141.96591,200
2018-12-04$143.56$143.56385,000
2018-12-03$147.17$147.17800,300
2018-11-30$144.72$144.72328,900
2018-11-29$141.73$141.73274,800
2018-11-28$141.84$141.84469,600
2018-11-27$135.86$135.86179,100
2018-11-26$135.96$135.96237,600
2018-11-23$133.82$133.82207,300
2018-11-21$129.34$129.34203,200
2018-11-20$128.27$128.27600,500
2018-11-19$127.95$127.95281,200
2018-11-16$132.87$132.87305,800
2018-11-15$135.00$135.00240,200
2018-11-14$135.76$135.76102,600
2018-11-13$137.99$137.99179,200
2018-11-12$138.02$138.02245,100
2018-11-09$138.46$138.46155,400
2018-11-08$139.13$139.13270,700
2018-11-07$143.73$143.73156,400
2018-11-06$139.88$139.88127,800
2018-11-05$138.39$138.39126,600
2018-11-02$137.33$137.33216,700
2018-11-01$139.97$139.97189,200
2018-10-31$138.08$138.08270,200
2018-10-30$132.84$132.84284,300
2018-10-29$134.81$134.81241,300
2018-10-26$138.41$138.41356,300
2018-10-25$135.82$135.82531,900
2018-10-24$131.58$131.58493,700
2018-10-23$141.41$141.41270,500
2018-10-22$143.09$143.09239,200
2018-10-19$142.18$142.18288,800
2018-10-18$146.96$146.96271,600
2018-10-17$147.17$147.17201,800
2018-10-16$149.16$149.16170,200
2018-10-15$144.16$144.16224,800
2018-10-12$144.92$144.92247,300
2018-10-11$140.77$140.77294,400
2018-10-10$140.39$140.39209,500
2018-10-09$146.66$146.66500,100
2018-10-08$147.55$147.55199,800
2018-10-05$149.14$149.14169,500
2018-10-04$149.01$149.01207,900
2018-10-03$153.29$153.29186,100
2018-10-02$151.55$151.55309,200
2018-10-01$152.11$152.11268,200
2018-09-28$153.75$153.75271,700
2018-09-27$150.80$150.80177,200
2018-09-26$149.55$149.55251,800
2018-09-25$149.43$149.43213,300
2018-09-24$149.67$149.6786,000
2018-09-21$150.25$150.25308,900
2018-09-20$149.99$149.99234,300
2018-09-19$146.82$146.82161,000
2018-09-18$146.65$146.65137,200
2018-09-17$145.27$145.27122,800
2018-09-14$147.70$147.70115,000
2018-09-13$145.97$145.97271,200
2018-09-12$148.15$148.15158,300
2018-09-11$147.34$147.34153,200
2018-09-10$145.50$145.50466,300
2018-09-07$143.99$143.99260,400
2018-09-06$146.40$146.40184,700
2018-09-05$146.47$146.47197,400
2018-09-04$150.10$150.10118,500
2018-08-31$149.02$149.02170,900
2018-08-30$147.56$147.56141,800
2018-08-29$146.57$146.57129,900
2018-08-28$145.73$145.73119,600
2018-08-27$145.32$145.32110,700
2018-08-24$144.49$144.49189,900
2018-08-23$144.48$144.48140,600
2018-08-22$144.83$144.8377,300
2018-08-21$143.94$143.94125,200
2018-08-20$141.94$141.94140,200
2018-08-17$143.68$143.68260,900
2018-08-16$143.35$143.35362,800
2018-08-15$145.05$145.05128,800
2018-08-14$145.73$145.73281,800
2018-08-13$146.18$146.18238,200
2018-08-10$147.55$147.55559,200
2018-08-09$143.96$143.96175,600
2018-08-08$144.49$144.49201,500
2018-08-07$145.46$145.46274,100
2018-08-06$143.77$143.77195,900
2018-08-03$143.94$143.94176,800
2018-08-02$143.74$143.74209,100
2018-08-01$139.00$139.00265,200
2018-07-31$139.16$139.16233,400
2018-07-30$137.69$137.69243,300
2018-07-27$141.00$141.00447,200
2018-07-26$144.86$144.86387,800
2018-07-25$139.94$139.94303,900
2018-07-24$139.55$139.55449,600
2018-07-23$140.88$140.88296,600
2018-07-20$140.14$140.14227,600
2018-07-19$138.35$138.35163,600
2018-07-18$136.55$136.55177,500
2018-07-17$137.21$137.21381,900
2018-07-16$136.85$136.85325,300
2018-07-13$138.35$138.35180,200
2018-07-12$139.45$139.45217,500
2018-07-11$136.99$136.99256,400
2018-07-10$137.52$137.52234,700
2018-07-09$135.70$135.70293,000
2018-07-06$132.75$132.75141,900
2018-07-05$132.24$132.24142,100
2018-07-03$132.27$132.27136,900
2018-07-02$131.30$131.30201,300
2018-06-29$132.53$132.53242,800
2018-06-28$131.80$131.80154,900
2018-06-27$130.88$130.88100,200
2018-06-26$133.23$133.23198,600
2018-06-25$133.68$133.68285,400
2018-06-22$137.03$137.03193,400
2018-06-21$136.33$136.33345,200
2018-06-20$136.54$136.54146,200
2018-06-19$135.81$135.81200,300
2018-06-18$134.77$134.77185,400
2018-06-15$135.46$135.46209,900
2018-06-14$136.00$136.00176,900
2018-06-13$135.16$135.16174,100
2018-06-12$133.18$133.18243,500
2018-06-11$133.97$133.97206,500
2018-06-08$133.79$133.79141,100
2018-06-07$133.06$133.06206,600
2018-06-06$133.39$133.39134,500
2018-06-05$131.12$131.12201,400
2018-06-04$129.79$129.79131,800
2018-06-01$131.03$131.03232,800
2018-05-31$128.98$128.98291,500
2018-05-30$125.90$125.90261,500
2018-05-29$123.46$123.46132,400
2018-05-25$124.23$124.23112,700
2018-05-24$124.31$124.31304,300
2018-05-23$124.20$124.20237,700
2018-05-22$126.80$126.8094,300
2018-05-21$126.05$126.0590,800
2018-05-18$125.74$125.74139,000
2018-05-17$123.26$123.26247,000
2018-05-16$122.19$122.19242,800
2018-05-15$122.98$122.98122,200
2018-05-14$125.70$125.70226,200
2018-05-11$126.17$126.17189,100
2018-05-10$123.82$123.82200,700
2018-05-09$123.16$123.16119,500
2018-05-08$121.82$121.82227,700
2018-05-07$121.22$121.22212,700
2018-05-04$121.93$121.93218,100
2018-05-03$118.11$118.11446,400
2018-05-02$117.26$117.26358,100
2018-05-01$118.73$118.73134,800
2018-04-30$117.63$117.63149,100
2018-04-27$118.50$118.50132,300
2018-04-26$117.58$117.58194,600
2018-04-25$117.57$117.57157,700
2018-04-24$117.34$117.34274,000
2018-04-23$118.50$118.50191,300
2018-04-20$117.64$117.64285,200
2018-04-19$119.08$119.08214,400
2018-04-18$121.22$121.22195,000
2018-04-17$120.84$120.84325,200
2018-04-16$119.29$119.29198,400
2018-04-13$119.80$119.80246,700
2018-04-12$119.20$119.20326,100
2018-04-11$116.49$116.49175,600
2018-04-10$116.09$116.09344,800
2018-04-09$113.36$113.36314,500
2018-04-06$111.38$111.38318,900
2018-04-05$112.15$112.15261,400
2018-04-04$112.58$112.58479,700
2018-04-03$113.01$113.01496,600
2018-04-02$114.30$114.30350,000
2018-03-29$118.14$118.14222,800
2018-03-28$118.36$118.36411,800
2018-03-27$120.58$120.58302,200
2018-03-26$121.37$121.37253,800
2018-03-23$117.52$117.52398,900
2018-03-22$117.82$117.82175,700
2018-03-21$119.69$119.69186,700
2018-03-20$119.66$119.66254,500
2018-03-19$122.12$122.12254,900
2018-03-16$122.21$122.21214,000
2018-03-15$121.49$121.49155,100
2018-03-14$121.72$121.72308,000
2018-03-13$121.41$121.41561,900
2018-03-12$123.90$123.90382,100
2018-03-09$122.19$122.19309,500
2018-03-08$118.64$118.64202,000
2018-03-07$117.00$117.00153,700
2018-03-06$116.92$116.92202,700
2018-03-05$115.09$115.09310,100
2018-03-02$115.11$115.11402,800
2018-03-01$113.17$113.17275,600
2018-02-28$113.31$113.31316,900
2018-02-27$113.51$113.51373,800
2018-02-26$113.63$113.63231,800
2018-02-23$114.89$114.89250,800
2018-02-22$111.28$111.28244,600
2018-02-21$111.88$111.88374,800
2018-02-20$115.06$115.06363,300
2018-02-16$115.01$115.01207,300
2018-02-15$113.86$113.86478,800
2018-02-14$110.19$110.19431,400
2018-02-13$109.36$109.36249,000
2018-02-12$109.55$109.55508,900
2018-02-09$107.02$107.02433,000
2018-02-08$105.67$105.67527,000
2018-02-07$107.01$107.01498,900
2018-02-06$106.03$106.03452,500
2018-02-05$103.82$103.82482,100
2018-02-02$106.93$106.93462,700
2018-02-01$111.74$111.74287,600
2018-01-31$109.52$109.52274,600
2018-01-30$110.31$110.31379,900
2018-01-29$114.46$114.46253,400
2018-01-26$115.57$115.57266,300
2018-01-25$111.33$111.33311,400
2018-01-24$111.65$111.65612,400
2018-01-23$114.10$114.10248,700
2018-01-22$112.68$112.68280,800
2018-01-19$113.97$113.97489,000
2018-01-18$111.95$111.95265,400
2018-01-17$112.88$112.88319,600
2018-01-16$112.29$112.29252,600
2018-01-12$113.27$113.27236,000
2018-01-11$114.71$114.71247,100
2018-01-10$117.81$117.81298,500
2018-01-09$118.72$118.72230,800
2018-01-08$117.37$117.37277,000
2018-01-05$117.62$117.62299,000
2018-01-04$113.91$113.91422,700
2018-01-03$114.02$114.02379,800
2018-01-02$114.48$114.48187,400