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ICON PLC (ICLR) stock

ICLRNasdaqServices-Commercial Physical & Biological Research
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 20-F on May 27, 2026Score 4/30
$211.36−4.12 (-1.91%)

Close on Oct 30, 2026Market cap $16.18BP/E 377.4Yield –

Price history

ICON share prices for every week, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$211.36
-1.91% on the day
52-week range
$66.57 – $219.04
-3.5% from the high
Change over 52 weeks
+27.8%
From $165.33 on Oct 30, 2025
Average volume
920,144
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 26, 2026$182.08$219.04$179.16$211.36+14.08%10,282,578
Oct 19, 2026$169.25$190.56$167.14$185.27+8.87%4,870,515
Oct 12, 2026$165.14$177.20$159.72$170.18+3.66%3,778,096
Oct 5, 2026$161.07$177.67$157.38$164.17+1.31%4,464,635
Sep 28, 2026$171.13$176.70$160.41$162.05-5.97%4,989,348
Sep 21, 2026$164.61$175.00$163.16$172.33+5.01%5,737,752
Sep 14, 2026$171.51$177.50$162.59$164.11-3.07%5,300,679
Sep 8, 2026$162.30$175.63$156.70$169.31+2.71%4,603,121
Aug 31, 2026$169.91$170.41$158.66$164.85-3.04%3,595,689
Aug 24, 2026$170.81$174.44$165.45$170.02-1.28%1,970,948
Aug 17, 2026$161.34$180.89$161.17$172.23+5.57%2,641,966
Aug 10, 2026$163.80$167.87$160.05$163.15-0.83%2,767,183
Aug 3, 2026$165.31$167.51$150.86$164.51+0.58%3,732,829
Jul 27, 2026$165.55$186.64$161.29$163.57-1.32%6,786,691
Jul 20, 2026$171.48$182.97$162.18$165.76-2.49%3,886,966
Jul 13, 2026$165.75$173.23$162.83$170.00+1.36%2,604,643
Jul 6, 2026$170.29$172.52$162.06$167.72-3.09%2,930,270
Jun 29, 2026$169.65$181.82$167.24$173.06+1.88%4,174,950
Jun 22, 2026$145.77$170.51$138.84$169.86+16.34%7,715,608
Jun 15, 2026$147.20$148.88$140.00$146.00-0.12%3,026,446
Jun 8, 2026$149.45$156.20$143.30$146.18-2.19%4,858,224
Jun 1, 2026$133.70$153.84$132.36$149.45+9.83%6,971,556
May 26, 2026$116.78$139.69$113.10$136.07+16.52%7,761,498
May 18, 2026$116.38$120.00$108.89$116.78+0.34%3,149,132
May 11, 2026$124.14$124.80$115.29$116.38-6.51%4,097,791
May 4, 2026$112.42$129.73$108.80$124.49+10.31%5,409,236
Apr 27, 2026$102.42$120.49$99.06$112.85+10.45%11,589,956
Apr 20, 2026$118.25$119.45$99.93$102.17-14.63%7,306,111
Apr 13, 2026$106.22$121.03$105.05$119.68+12.05%5,522,273
Apr 6, 2026$113.50$114.06$102.53$106.81-6.46%3,317,590
Mar 30, 2026$103.07$115.63$102.30$114.19+11.86%3,739,124
Mar 23, 2026$101.05$104.27$97.11$102.08+2.39%4,031,752
Mar 16, 2026$99.94$102.34$95.75$99.70+1.39%5,162,410
Mar 9, 2026$105.77$110.41$97.06$98.33-8.27%5,313,839
Mar 2, 2026$105.81$113.88$103.74$107.20-0.87%6,748,405
Feb 23, 2026$100.68$108.72$99.49$108.14+8.47%7,660,124
Feb 17, 2026$90.48$100.83$87.91$99.70+7.20%12,267,413
Feb 9, 2026$150.80$155.00$66.57$93.00-38.24%44,073,173
Feb 2, 2026$180.25$180.51$144.27$150.59-16.45%7,033,178
Jan 26, 2026$185.68$191.00$176.34$180.25-3.45%3,019,271
Jan 20, 2026$178.43$190.21$173.42$186.70+2.24%2,994,882
Jan 12, 2026$182.98$188.00$177.47$182.61+0.68%4,630,175
Jan 5, 2026$186.54$203.91$171.99$181.38-3.86%7,751,849
Dec 29, 2025$183.20$189.53$180.48$188.67+3.19%1,943,059
Dec 22, 2025$173.46$184.01$172.55$182.84+5.22%2,405,507
Dec 15, 2025$184.94$189.23$172.79$173.77-6.87%4,786,246
Dec 8, 2025$185.68$191.85$178.80$186.58+0.38%4,066,276
Dec 1, 2025$183.80$191.15$174.13$185.87+0.47%5,844,310
Nov 24, 2025$163.11$186.57$161.75$185.00+12.42%4,544,460
Nov 17, 2025$160.91$165.49$154.12$164.56+1.47%5,780,260
Nov 10, 2025$158.03$167.43$156.05$162.18+1.91%3,306,511
Nov 3, 2025$169.19$170.95$155.00$159.14-7.38%3,105,060

Seasonality

ICLR return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.1%-5.0%-1.1%-0.1%5.2%5.8%6.9%1.4%-2.3%0.4%4.1%-0.0%
Months up4 of 103 of 105 of 104 of 108 of 107 of 109 of 107 of 105 of 104 of 106 of 94 of 9
2026-1.1%-40.0%2.3%6.9%15.0%27.7%-5.8%0.9%3.0%24.3%
2025-5.1%-4.6%-7.9%-13.5%-14.0%11.6%16.3%5.2%-1.7%-1.8%7.7%-1.5%
2024-7.8%22.9%4.8%-11.3%9.0%-3.5%4.8%-1.9%-10.8%-22.7%-5.3%-0.3%
202318.8%-2.2%-5.3%-9.8%10.6%17.4%0.5%3.4%-5.3%-0.9%9.4%6.0%
2022-14.2%-10.4%2.2%-7.0%-1.1%-3.2%11.3%-13.0%-12.4%7.7%8.9%-9.8%
20214.5%-11.3%8.7%10.5%3.1%-7.6%17.7%5.1%2.4%9.4%-5.7%14.5%
2020-2.1%-7.4%-12.9%18.0%5.0%0.0%10.1%0.5%2.5%-5.6%8.1%0.1%
20198.3%0.1%-2.4%0.0%3.6%8.8%1.4%-1.3%-4.4%-0.3%11.1%5.6%
2018-2.3%3.5%4.3%-0.4%9.6%2.8%5.0%7.1%3.2%-10.2%4.8%-10.7%
201711.8%-0.3%-4.8%6.0%11.4%3.9%7.3%8.0%0.4%4.4%-1.7%-4.0%