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 — 2017

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2017-12-29$112.15$112.15162,200
2017-12-28$113.37$113.37197,900
2017-12-27$113.19$113.19116,200
2017-12-26$113.36$113.36157,500
2017-12-22$113.59$113.59203,800
2017-12-21$112.67$112.67262,100
2017-12-20$114.55$114.55179,100
2017-12-19$114.35$114.35349,900
2017-12-18$112.47$112.47444,100
2017-12-15$114.00$114.00251,100
2017-12-14$113.52$113.52192,100
2017-12-13$113.87$113.87295,700
2017-12-12$112.72$112.72280,700
2017-12-11$111.18$111.18447,900
2017-12-08$111.91$111.91318,200
2017-12-07$111.14$111.14208,000
2017-12-06$111.76$111.76238,500
2017-12-05$112.51$112.51312,700
2017-12-04$111.97$111.97608,800
2017-12-01$116.55$116.55211,300
2017-11-30$116.81$116.81269,100
2017-11-29$114.91$114.91310,400
2017-11-28$116.18$116.18212,900
2017-11-27$116.50$116.50189,900
2017-11-24$117.06$117.0663,100
2017-11-22$118.35$118.35234,800
2017-11-21$117.45$117.45342,200
2017-11-20$115.68$115.68176,500
2017-11-17$117.25$117.25271,300
2017-11-16$115.68$115.68251,000
2017-11-15$113.46$113.46192,700
2017-11-14$112.35$112.35241,200
2017-11-13$113.24$113.24360,700
2017-11-10$113.81$113.81419,300
2017-11-09$115.36$115.36470,600
2017-11-08$120.70$120.70358,900
2017-11-07$121.39$121.39203,900
2017-11-06$122.88$122.88244,400
2017-11-03$123.05$123.05255,700
2017-11-02$120.47$120.47250,800
2017-11-01$120.93$120.93328,400
2017-10-31$118.86$118.86386,600
2017-10-30$118.62$118.62263,900
2017-10-27$121.14$121.14414,900
2017-10-26$122.79$122.79920,900
2017-10-25$112.91$112.91261,700
2017-10-24$112.83$112.83174,700
2017-10-23$113.49$113.49311,300
2017-10-20$113.63$113.63282,700
2017-10-19$114.36$114.36133,700
2017-10-18$114.49$114.49212,200
2017-10-17$113.77$113.77386,300
2017-10-16$115.68$115.68267,800
2017-10-13$113.63$113.63294,900
2017-10-12$114.85$114.85305,400
2017-10-11$115.87$115.87254,500
2017-10-10$114.01$114.01273,900
2017-10-09$113.68$113.68345,500
2017-10-06$113.63$113.63226,100
2017-10-05$114.71$114.7191,400
2017-10-04$114.36$114.36112,400
2017-10-03$113.74$113.74161,600
2017-10-02$113.90$113.90282,800
2017-09-29$113.88$113.88237,800
2017-09-28$111.71$111.71246,100
2017-09-27$113.00$113.00258,600
2017-09-26$112.00$112.00351,700
2017-09-25$110.68$110.68237,500
2017-09-22$110.97$110.97227,700
2017-09-21$111.68$111.68188,500
2017-09-20$110.61$110.61315,600
2017-09-19$112.47$112.47510,200
2017-09-18$113.39$113.39377,100
2017-09-15$111.34$111.34224,700
2017-09-14$111.59$111.59393,400
2017-09-13$112.53$112.53535,000
2017-09-12$114.71$114.71228,600
2017-09-11$115.98$115.98300,900
2017-09-08$115.10$115.10323,900
2017-09-07$116.62$116.62515,700
2017-09-06$113.58$113.58451,500
2017-09-05$112.22$112.22333,100
2017-09-01$113.94$113.94299,200
2017-08-31$113.39$113.39365,600
2017-08-30$112.51$112.51443,100
2017-08-29$111.99$111.99468,100
2017-08-28$109.88$109.88270,500
2017-08-25$108.23$108.23248,000
2017-08-24$107.51$107.51147,700
2017-08-23$106.78$106.78353,700
2017-08-22$107.89$107.89329,600
2017-08-21$105.30$105.30315,800
2017-08-18$104.99$104.99208,400
2017-08-17$105.19$105.19547,900
2017-08-16$102.44$102.44200,000
2017-08-15$102.15$102.15371,000
2017-08-14$102.58$102.58243,800
2017-08-11$101.40$101.40233,700
2017-08-10$102.02$102.02271,500
2017-08-09$104.88$104.88201,800
2017-08-08$104.73$104.73208,500
2017-08-07$104.56$104.56178,000
2017-08-04$103.95$103.95254,000
2017-08-03$106.23$106.23274,200
2017-08-02$106.32$106.32368,200
2017-08-01$106.09$106.09421,300
2017-07-31$104.95$104.95725,300
2017-07-28$102.84$102.84932,800
2017-07-27$105.83$105.831,171,600
2017-07-26$99.47$99.47351,000
2017-07-25$99.01$99.01407,000
2017-07-24$99.61$99.61211,500
2017-07-21$99.85$99.85177,400
2017-07-20$99.80$99.80164,800
2017-07-19$100.21$100.21236,100
2017-07-18$98.77$98.77172,300
2017-07-17$99.22$99.22186,500
2017-07-14$99.32$99.32277,000
2017-07-13$99.62$99.62141,200
2017-07-12$99.83$99.83157,700
2017-07-11$98.79$98.79225,900
2017-07-10$98.34$98.34303,200
2017-07-07$98.24$98.24600,400
2017-07-06$96.48$96.48158,100
2017-07-05$98.14$98.14411,300
2017-07-03$97.58$97.58124,900
2017-06-30$97.79$97.79313,900
2017-06-29$98.43$98.43488,700
2017-06-28$96.63$96.63387,800
2017-06-27$95.81$95.81407,200
2017-06-26$96.53$96.53177,700
2017-06-23$96.37$96.37194,500
2017-06-22$96.63$96.63444,900
2017-06-21$96.39$96.39455,700
2017-06-20$97.34$97.34736,200
2017-06-19$94.91$94.91628,800
2017-06-16$92.99$92.99264,800
2017-06-15$93.40$93.40239,900
2017-06-14$94.34$94.34387,600
2017-06-13$96.27$96.27192,500
2017-06-12$96.38$96.38352,500
2017-06-09$97.00$97.00511,800
2017-06-08$97.69$97.69398,200
2017-06-07$96.81$96.81410,000
2017-06-06$96.58$96.58379,700
2017-06-05$96.40$96.40268,400
2017-06-02$96.77$96.77264,300
2017-06-01$95.47$95.47440,400
2017-05-31$94.10$94.10318,700
2017-05-30$92.71$92.71388,300
2017-05-26$91.73$91.73182,600
2017-05-25$89.97$89.97427,100
2017-05-24$89.92$89.92419,400
2017-05-23$88.95$88.95284,400
2017-05-22$89.44$89.44267,300
2017-05-19$90.03$90.03605,100
2017-05-18$87.73$87.73119,200
2017-05-17$86.38$86.38258,600
2017-05-16$88.48$88.48339,300
2017-05-15$88.53$88.53389,800
2017-05-12$87.69$87.69185,800
2017-05-11$89.04$89.04275,400
2017-05-10$88.60$88.60304,900
2017-05-09$87.84$87.84451,900
2017-05-08$87.28$87.28548,700
2017-05-05$85.96$85.96264,000
2017-05-04$85.55$85.55312,200
2017-05-03$85.19$85.19502,000
2017-05-02$85.00$85.00780,700
2017-05-01$85.26$85.26532,900
2017-04-28$84.49$84.49822,200
2017-04-27$83.17$83.171,430,500
2017-04-26$76.83$76.83588,100
2017-04-25$77.37$77.37698,400
2017-04-24$79.57$79.57394,100
2017-04-21$79.87$79.87657,700
2017-04-20$80.15$80.15398,300
2017-04-19$78.23$78.23356,000
2017-04-18$77.04$77.04360,200
2017-04-17$77.82$77.82195,600
2017-04-13$77.58$77.58175,900
2017-04-12$78.57$78.57215,100
2017-04-11$78.81$78.81265,200
2017-04-10$79.54$79.54199,400
2017-04-07$80.16$80.16176,300
2017-04-06$80.47$80.47242,000
2017-04-05$79.75$79.75221,300
2017-04-04$80.00$80.00462,000
2017-04-03$80.12$80.12308,100
2017-03-31$79.72$79.72306,500
2017-03-30$80.27$80.27240,000
2017-03-29$80.72$80.72422,100
2017-03-28$80.20$80.20315,500
2017-03-27$78.97$78.97431,300
2017-03-24$78.94$78.94478,300
2017-03-23$77.60$77.60479,700
2017-03-22$78.08$78.08751,800
2017-03-21$77.78$77.78911,700
2017-03-20$78.90$78.90354,100
2017-03-17$79.75$79.75388,900
2017-03-16$80.14$80.14253,800
2017-03-15$81.08$81.08694,000
2017-03-14$79.37$79.37560,900
2017-03-13$79.97$79.97310,000
2017-03-10$80.68$80.68907,900
2017-03-09$80.36$80.36558,000
2017-03-08$81.31$81.31554,400
2017-03-07$82.07$82.07359,500
2017-03-06$82.24$82.24294,800
2017-03-03$83.47$83.47554,700
2017-03-02$83.72$83.72263,000
2017-03-01$84.14$84.14364,900
2017-02-28$83.77$83.77509,300
2017-02-27$84.62$84.62261,600
2017-02-24$84.00$84.00323,400
2017-02-23$85.35$85.35496,300
2017-02-22$85.00$85.00526,100
2017-02-21$84.83$84.83497,100
2017-02-17$85.68$85.68352,000
2017-02-16$87.78$87.78573,300
2017-02-15$85.67$85.67419,200
2017-02-14$86.42$86.42624,600
2017-02-13$84.71$84.71277,000
2017-02-10$86.43$86.43225,500
2017-02-09$86.26$86.26371,600
2017-02-08$85.30$85.30276,900
2017-02-07$84.07$84.07326,900
2017-02-06$84.73$84.73253,600
2017-02-03$85.28$85.28210,200
2017-02-02$84.28$84.28242,100
2017-02-01$84.88$84.88433,700
2017-01-31$84.06$84.06365,400
2017-01-30$81.47$81.47187,300
2017-01-27$81.98$81.98231,000
2017-01-26$81.30$81.30185,900
2017-01-25$81.31$81.31378,400
2017-01-24$79.97$79.97371,600
2017-01-23$79.47$79.47399,800
2017-01-20$80.07$80.07455,900
2017-01-19$80.74$80.74441,300
2017-01-18$80.82$80.82668,800
2017-01-17$80.75$80.75399,700
2017-01-13$82.09$82.09400,900
2017-01-12$83.51$83.51405,800
2017-01-11$82.20$82.20410,900
2017-01-10$81.96$81.96756,200
2017-01-09$80.37$80.37517,400
2017-01-06$78.65$78.65658,300
2017-01-05$76.21$76.21349,200
2017-01-04$76.82$76.82396,600
2017-01-03$74.71$74.71283,300