ICON PLC (ICLR) stock
ICLRNasdaqServices-Commercial Physical & Biological Research
$211.36−4.12 (-1.91%)
Close on Oct 30, 2026Market cap $16.18BP/E 377.4Yield –
Price history
ICON share prices for every trading day, newest first. Adjusted for stock splits, not for dividends.
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
| Date | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 30, 2026 | $211.52 | $212.91 | $207.01 | $211.36 | -1.91% | 2,580,650 |
| Oct 29, 2026 | $211.53 | $219.04 | $207.54 | $215.48 | +0.62% | 1,797,084 |
| Oct 28, 2026 | $199.19 | $214.94 | $195.80 | $214.16 | +17.04% | 3,947,667 |
| Oct 27, 2026 | $182.23 | $186.99 | $181.74 | $182.98 | -0.44% | 890,732 |
| Oct 26, 2026 | $182.08 | $185.59 | $179.16 | $183.78 | -0.80% | 1,066,445 |
| Oct 23, 2026 | $184.25 | $185.57 | $179.89 | $185.27 | -0.09% | 1,022,544 |
| Oct 22, 2026 | $180.09 | $190.56 | $180.09 | $185.43 | +0.10% | 1,018,520 |
| Oct 21, 2026 | $171.54 | $188.27 | $171.54 | $185.25 | +6.35% | 1,164,648 |
| Oct 20, 2026 | $169.26 | $176.73 | $168.64 | $174.19 | +3.60% | 936,269 |
| Oct 19, 2026 | $169.25 | $173.11 | $167.14 | $168.14 | -1.20% | 728,534 |
| Oct 16, 2026 | $173.58 | $176.81 | $167.95 | $170.18 | -2.83% | 667,941 |
| Oct 15, 2026 | $170.20 | $177.20 | $166.94 | $175.13 | +3.65% | 795,832 |
| Oct 14, 2026 | $163.54 | $170.32 | $163.14 | $168.97 | +2.82% | 629,664 |
| Oct 13, 2026 | $164.54 | $166.17 | $159.72 | $164.34 | -0.04% | 815,111 |
| Oct 12, 2026 | $165.14 | $169.83 | $163.90 | $164.40 | +0.14% | 869,548 |
| Oct 9, 2026 | $167.04 | $169.85 | $163.47 | $164.17 | -0.20% | 745,643 |
| Oct 8, 2026 | $161.62 | $164.95 | $159.16 | $164.50 | +0.26% | 1,026,195 |
| Oct 7, 2026 | $160.93 | $165.22 | $157.38 | $164.08 | +1.48% | 776,242 |
| Oct 6, 2026 | $169.69 | $177.67 | $161.14 | $161.69 | -3.94% | 984,008 |
| Oct 5, 2026 | $161.07 | $168.76 | $160.99 | $168.33 | +3.88% | 932,547 |
| Oct 2, 2026 | $161.85 | $163.43 | $160.41 | $162.05 | +0.12% | 676,143 |
| Oct 1, 2026 | $169.99 | $170.22 | $160.90 | $161.85 | -4.79% | 677,229 |
| Sep 30, 2026 | $167.98 | $170.40 | $165.24 | $169.99 | -0.21% | 851,063 |
| Sep 29, 2026 | $174.50 | $176.70 | $169.73 | $170.35 | -2.97% | 1,442,756 |
| Sep 28, 2026 | $171.13 | $175.87 | $169.38 | $175.57 | +1.88% | 1,342,157 |
| Sep 25, 2026 | $173.80 | $174.92 | $170.44 | $172.33 | -0.90% | 965,904 |
| Sep 24, 2026 | $163.79 | $175.00 | $163.79 | $173.90 | +6.10% | 1,619,312 |
| Sep 23, 2026 | $167.77 | $169.28 | $163.41 | $163.90 | -1.92% | 1,064,859 |
| Sep 22, 2026 | $170.55 | $172.04 | $167.11 | $167.11 | -1.44% | 1,056,012 |
| Sep 21, 2026 | $164.61 | $169.95 | $163.16 | $169.55 | +3.31% | 1,031,665 |
| Sep 18, 2026 | $169.50 | $169.50 | $162.59 | $164.11 | -3.28% | 1,122,557 |
| Sep 17, 2026 | $175.01 | $177.50 | $169.44 | $169.68 | -2.45% | 1,172,050 |
| Sep 16, 2026 | $173.51 | $175.59 | $172.09 | $173.94 | +0.86% | 818,589 |
| Sep 15, 2026 | $168.02 | $172.94 | $167.72 | $172.45 | +2.08% | 862,417 |
| Sep 14, 2026 | $171.51 | $173.40 | $167.80 | $168.93 | -0.22% | 1,325,066 |
| Sep 11, 2026 | $165.68 | $175.63 | $165.68 | $169.31 | +2.18% | 1,710,005 |
| Sep 10, 2026 | $159.27 | $166.53 | $156.70 | $165.69 | +3.87% | 1,142,388 |
| Sep 9, 2026 | $158.71 | $161.76 | $157.26 | $159.51 | +0.74% | 801,141 |
| Sep 8, 2026 | $162.30 | $162.42 | $158.04 | $158.34 | -3.95% | 949,587 |
| Sep 4, 2026 | $159.94 | $165.92 | $159.50 | $164.85 | +0.78% | 796,396 |
| Sep 3, 2026 | $159.87 | $164.35 | $159.55 | $163.58 | +2.34% | 594,049 |
| Sep 2, 2026 | $161.88 | $164.24 | $158.66 | $159.84 | -0.97% | 893,170 |
| Sep 1, 2026 | $165.24 | $165.36 | $160.01 | $161.40 | -2.18% | 604,611 |
| Aug 31, 2026 | $169.91 | $170.41 | $163.57 | $164.99 | -2.96% | 707,463 |
| Aug 28, 2026 | $169.41 | $170.42 | $165.70 | $170.02 | +0.18% | 314,630 |
| Aug 27, 2026 | $168.84 | $174.12 | $168.27 | $169.72 | +0.47% | 376,594 |
| Aug 26, 2026 | $165.88 | $169.83 | $165.45 | $168.93 | +0.01% | 414,096 |
| Aug 25, 2026 | $172.69 | $173.00 | $168.01 | $168.91 | -2.63% | 444,911 |
| Aug 24, 2026 | $170.81 | $174.44 | $168.38 | $173.48 | +0.73% | 420,717 |
| Aug 21, 2026 | $173.02 | $179.02 | $172.03 | $172.23 | -1.17% | 391,179 |
| Aug 20, 2026 | $170.17 | $180.89 | $170.17 | $174.27 | +1.03% | 516,252 |
| Aug 19, 2026 | $170.10 | $175.71 | $167.49 | $172.49 | +3.26% | 687,878 |
| Aug 18, 2026 | $170.00 | $172.95 | $166.87 | $167.05 | -1.42% | 556,625 |
| Aug 17, 2026 | $161.34 | $169.73 | $161.17 | $169.45 | +3.86% | 490,032 |
| Aug 14, 2026 | $166.65 | $167.29 | $162.42 | $163.15 | -2.59% | 323,993 |
| Aug 13, 2026 | $167.69 | $167.87 | $160.05 | $167.48 | +0.19% | 442,063 |
| Aug 12, 2026 | $165.27 | $167.74 | $161.77 | $167.17 | +0.96% | 822,284 |
| Aug 11, 2026 | $165.56 | $167.34 | $161.89 | $165.58 | -0.28% | 662,270 |
| Aug 10, 2026 | $163.80 | $167.70 | $163.80 | $166.05 | +0.94% | 516,573 |
| Aug 7, 2026 | $161.86 | $164.89 | $160.46 | $164.51 | +2.07% | 388,372 |
| Aug 6, 2026 | $162.37 | $162.65 | $159.07 | $161.17 | -1.43% | 469,348 |
| Aug 5, 2026 | $158.65 | $167.51 | $156.00 | $163.51 | +4.25% | 617,777 |
| Aug 4, 2026 | $156.71 | $157.42 | $150.86 | $156.85 | -0.98% | 1,045,210 |
| Aug 3, 2026 | $165.31 | $165.80 | $156.56 | $158.41 | -3.15% | 1,212,122 |
| Jul 31, 2026 | $165.45 | $171.74 | $162.41 | $163.57 | -1.19% | 871,917 |
| Jul 30, 2026 | $165.75 | $172.97 | $162.50 | $165.53 | -7.10% | 1,774,130 |
| Jul 29, 2026 | $180.25 | $182.54 | $175.63 | $178.18 | -1.14% | 1,571,972 |
| Jul 28, 2026 | $177.58 | $186.64 | $177.17 | $180.24 | +6.79% | 1,790,430 |
| Jul 27, 2026 | $165.55 | $169.98 | $161.29 | $168.78 | +1.82% | 778,242 |
| Jul 24, 2026 | $173.86 | $173.89 | $165.58 | $165.76 | -2.68% | 757,706 |
| Jul 23, 2026 | $175.00 | $182.97 | $169.62 | $170.32 | +1.82% | 1,281,985 |
| Jul 22, 2026 | $167.19 | $168.00 | $164.14 | $167.28 | +0.40% | 568,064 |
| Jul 21, 2026 | $163.70 | $167.64 | $162.18 | $166.62 | +0.26% | 576,116 |
| Jul 20, 2026 | $171.48 | $171.48 | $164.55 | $166.18 | -2.25% | 703,095 |
| Jul 17, 2026 | $167.00 | $172.40 | $167.00 | $170.00 | 0.00% | 579,565 |
| Jul 16, 2026 | $171.58 | $173.23 | $167.22 | $170.00 | -1.21% | 501,845 |
| Jul 15, 2026 | $169.63 | $172.26 | $167.32 | $172.08 | +2.45% | 460,338 |
| Jul 14, 2026 | $165.10 | $169.38 | $162.83 | $167.97 | +1.13% | 661,320 |
| Jul 13, 2026 | $165.75 | $168.14 | $164.32 | $166.10 | -0.97% | 401,575 |
| Jul 10, 2026 | $168.77 | $170.00 | $167.71 | $167.72 | -0.62% | 308,538 |
| Jul 9, 2026 | $166.45 | $170.40 | $164.42 | $168.77 | +1.99% | 525,263 |
| Jul 8, 2026 | $166.88 | $167.96 | $162.06 | $165.47 | -1.93% | 653,781 |
| Jul 7, 2026 | $172.03 | $172.52 | $167.55 | $168.72 | -1.30% | 665,519 |
| Jul 6, 2026 | $170.29 | $171.23 | $167.83 | $170.94 | -1.23% | 777,169 |
| Jul 2, 2026 | $177.07 | $179.29 | $170.93 | $173.06 | -1.14% | 938,189 |
| Jul 1, 2026 | $174.00 | $181.82 | $173.22 | $175.05 | +0.77% | 809,235 |
| Jun 30, 2026 | $178.29 | $181.00 | $170.85 | $173.71 | +0.42% | 1,067,785 |
| Jun 29, 2026 | $169.65 | $173.51 | $167.24 | $172.99 | +1.84% | 1,359,741 |
| Jun 26, 2026 | $158.59 | $170.51 | $158.59 | $169.86 | +5.53% | 1,443,150 |
| Jun 25, 2026 | $161.92 | $168.63 | $160.47 | $160.96 | +1.76% | 2,250,967 |
| Jun 24, 2026 | $147.79 | $162.00 | $147.71 | $158.17 | +10.86% | 2,406,490 |
| Jun 23, 2026 | $139.72 | $145.01 | $138.84 | $142.67 | +1.38% | 696,206 |
| Jun 22, 2026 | $145.77 | $148.00 | $140.14 | $140.73 | -3.61% | 918,795 |
| Jun 18, 2026 | $145.32 | $146.51 | $141.70 | $146.00 | +1.91% | 870,065 |
| Jun 17, 2026 | $143.65 | $145.09 | $140.00 | $143.27 | -0.19% | 989,822 |
| Jun 16, 2026 | $148.88 | $148.88 | $142.93 | $143.54 | -2.83% | 568,515 |
| Jun 15, 2026 | $147.20 | $148.74 | $144.84 | $147.72 | +1.05% | 598,044 |
| Jun 12, 2026 | $150.11 | $151.53 | $143.86 | $146.18 | -2.49% | 703,865 |
| Jun 11, 2026 | $144.89 | $149.97 | $143.30 | $149.92 | +3.69% | 790,291 |
| Jun 10, 2026 | $152.15 | $154.27 | $144.31 | $144.59 | -4.76% | 1,014,576 |
| Jun 9, 2026 | $152.93 | $156.20 | $150.32 | $151.82 | -0.28% | 1,220,459 |
| Jun 8, 2026 | $149.45 | $153.94 | $147.17 | $152.24 | +1.87% | 1,129,033 |
| Jun 5, 2026 | $151.78 | $153.75 | $147.97 | $149.45 | -2.19% | 1,348,942 |
| Jun 4, 2026 | $144.28 | $153.84 | $144.28 | $152.80 | +6.18% | 1,689,878 |
| Jun 3, 2026 | $136.79 | $145.92 | $135.52 | $143.90 | +4.62% | 1,380,500 |
| Jun 2, 2026 | $138.28 | $143.04 | $134.39 | $137.54 | -0.35% | 1,244,128 |
| Jun 1, 2026 | $133.70 | $138.46 | $132.36 | $138.03 | +1.44% | 1,308,108 |
| May 29, 2026 | $134.75 | $138.46 | $131.49 | $136.07 | -0.53% | 1,581,296 |
| May 28, 2026 | $117.82 | $139.69 | $116.48 | $136.80 | +15.49% | 3,417,976 |
| May 27, 2026 | $114.50 | $118.67 | $113.94 | $118.45 | +4.04% | 1,765,704 |
| May 26, 2026 | $116.78 | $116.78 | $113.10 | $113.85 | -2.51% | 996,522 |
| May 22, 2026 | $116.57 | $119.55 | $115.16 | $116.78 | +0.18% | 383,745 |
| May 21, 2026 | $113.90 | $116.80 | $112.43 | $116.57 | +1.29% | 371,708 |
| May 20, 2026 | $112.00 | $118.05 | $108.89 | $115.09 | +1.36% | 859,076 |
| May 19, 2026 | $114.38 | $116.63 | $113.38 | $113.55 | -0.20% | 967,128 |
| May 18, 2026 | $116.38 | $120.00 | $112.86 | $113.78 | -2.23% | 567,475 |
| May 15, 2026 | $117.09 | $118.70 | $115.29 | $116.38 | -0.61% | 643,446 |
| May 14, 2026 | $116.39 | $122.77 | $116.39 | $117.09 | -0.25% | 1,185,035 |
| May 13, 2026 | $121.76 | $121.76 | $115.64 | $117.38 | -3.74% | 641,129 |
| May 12, 2026 | $120.65 | $123.31 | $118.03 | $121.94 | +2.51% | 803,699 |
| May 11, 2026 | $124.14 | $124.80 | $118.79 | $118.96 | -4.44% | 824,482 |
| May 8, 2026 | $124.97 | $128.95 | $120.34 | $124.49 | -0.41% | 681,154 |
| May 7, 2026 | $125.27 | $129.73 | $122.91 | $125.00 | +0.70% | 1,121,630 |
| May 6, 2026 | $123.14 | $125.66 | $121.00 | $124.13 | +2.32% | 1,230,812 |
| May 5, 2026 | $112.00 | $122.45 | $112.00 | $121.32 | +8.35% | 1,594,531 |
| May 4, 2026 | $112.42 | $112.53 | $108.80 | $111.97 | -0.78% | 781,109 |
| May 1, 2026 | $119.66 | $120.49 | $112.12 | $112.85 | -4.63% | 1,000,929 |
| Apr 30, 2026 | $115.15 | $118.80 | $111.00 | $118.33 | +1.86% | 1,561,248 |
| Apr 29, 2026 | $116.25 | $119.43 | $110.38 | $116.17 | +13.35% | 4,097,169 |
| Apr 28, 2026 | $103.09 | $103.85 | $99.06 | $102.49 | -0.70% | 1,580,316 |
| Apr 27, 2026 | $102.42 | $103.34 | $99.37 | $103.21 | +1.02% | 3,350,294 |
| Apr 24, 2026 | $107.71 | $107.71 | $99.93 | $102.17 | -3.92% | 1,801,960 |
| Apr 23, 2026 | $107.50 | $110.10 | $104.03 | $106.34 | -7.87% | 2,320,405 |
| Apr 22, 2026 | $116.91 | $117.72 | $113.48 | $115.43 | +0.22% | 1,164,462 |
| Apr 21, 2026 | $116.47 | $118.68 | $114.10 | $115.18 | -1.66% | 1,023,921 |
| Apr 20, 2026 | $118.25 | $119.45 | $115.78 | $117.12 | -2.14% | 995,363 |
| Apr 17, 2026 | $116.98 | $121.03 | $116.41 | $119.68 | +3.55% | 1,175,806 |
| Apr 16, 2026 | $116.54 | $118.54 | $114.26 | $115.58 | -0.79% | 1,139,195 |
| Apr 15, 2026 | $113.31 | $116.65 | $112.53 | $116.50 | +3.04% | 1,356,758 |
| Apr 14, 2026 | $110.54 | $114.29 | $110.25 | $113.06 | +2.44% | 899,386 |
| Apr 13, 2026 | $106.22 | $111.09 | $105.05 | $110.37 | +3.33% | 951,128 |
| Apr 10, 2026 | $107.76 | $107.76 | $104.07 | $106.81 | +0.10% | 669,617 |
| Apr 9, 2026 | $105.12 | $106.83 | $102.53 | $106.70 | +0.15% | 692,962 |
| Apr 8, 2026 | $111.90 | $113.12 | $106.15 | $106.54 | -0.58% | 784,771 |
| Apr 7, 2026 | $109.62 | $110.74 | $106.42 | $107.16 | -2.24% | 536,851 |
| Apr 6, 2026 | $113.50 | $114.06 | $108.15 | $109.62 | -4.00% | 633,389 |
| Apr 2, 2026 | $110.06 | $115.63 | $108.58 | $114.19 | +2.49% | 661,195 |
| Apr 1, 2026 | $110.83 | $112.94 | $110.33 | $111.42 | +0.69% | 798,208 |
| Mar 31, 2026 | $105.10 | $112.01 | $103.19 | $110.66 | +5.29% | 1,190,155 |
| Mar 30, 2026 | $103.07 | $106.90 | $102.30 | $105.10 | +2.96% | 1,089,566 |
| Mar 27, 2026 | $102.70 | $103.97 | $100.95 | $102.08 | -0.97% | 1,045,776 |
| Mar 26, 2026 | $101.63 | $103.22 | $100.25 | $103.08 | +3.09% | 846,765 |
| Mar 25, 2026 | $102.40 | $104.27 | $97.11 | $99.99 | -1.27% | 557,686 |
| Mar 24, 2026 | $99.88 | $103.92 | $98.60 | $101.28 | +0.93% | 778,745 |
| Mar 23, 2026 | $101.05 | $103.42 | $99.88 | $100.35 | +0.65% | 802,780 |
| Mar 20, 2026 | $98.18 | $100.70 | $97.21 | $99.70 | +1.68% | 1,375,338 |
| Mar 19, 2026 | $96.01 | $98.77 | $95.75 | $98.05 | +0.94% | 689,039 |
| Mar 18, 2026 | $98.30 | $99.73 | $96.50 | $97.14 | -3.33% | 1,164,477 |
| Mar 17, 2026 | $98.99 | $102.34 | $98.01 | $100.49 | +2.95% | 874,149 |
| Mar 16, 2026 | $99.94 | $100.68 | $96.00 | $97.61 | -0.73% | 1,059,407 |
| Mar 13, 2026 | $98.40 | $99.40 | $97.06 | $98.33 | +0.90% | 970,245 |
| Mar 12, 2026 | $104.35 | $107.12 | $97.36 | $97.45 | -7.53% | 1,146,472 |
| Mar 11, 2026 | $107.12 | $107.98 | $104.30 | $105.38 | -1.16% | 791,939 |
| Mar 10, 2026 | $110.25 | $110.25 | $105.75 | $106.62 | -3.10% | 1,353,363 |
| Mar 9, 2026 | $105.77 | $110.41 | $104.01 | $110.03 | +2.64% | 1,051,820 |
| Mar 6, 2026 | $108.23 | $109.97 | $106.28 | $107.20 | -3.07% | 1,393,466 |
| Mar 5, 2026 | $108.43 | $113.88 | $108.43 | $110.60 | +0.36% | 1,330,117 |
| Mar 4, 2026 | $109.29 | $111.37 | $106.98 | $110.20 | +1.38% | 1,027,038 |
| Mar 3, 2026 | $105.89 | $109.58 | $103.74 | $108.70 | +0.40% | 1,225,753 |
| Mar 2, 2026 | $105.81 | $110.28 | $105.51 | $108.27 | +0.12% | 1,772,031 |
| Feb 27, 2026 | $105.95 | $108.72 | $104.12 | $108.14 | +1.89% | 1,383,290 |
| Feb 26, 2026 | $100.65 | $106.86 | $99.98 | $106.13 | +5.08% | 1,396,515 |
| Feb 25, 2026 | $104.92 | $104.92 | $99.49 | $101.00 | -2.97% | 1,138,596 |
| Feb 24, 2026 | $104.84 | $106.89 | $103.85 | $104.09 | -0.54% | 1,287,055 |
| Feb 23, 2026 | $100.68 | $105.50 | $100.03 | $104.66 | +4.97% | 2,454,668 |
| Feb 20, 2026 | $96.83 | $100.83 | $96.83 | $99.70 | +1.31% | 1,642,937 |
| Feb 19, 2026 | $94.85 | $99.52 | $92.59 | $98.41 | +1.98% | 2,217,636 |
| Feb 18, 2026 | $89.26 | $97.30 | $87.91 | $96.50 | +8.89% | 3,163,478 |
| Feb 17, 2026 | $90.48 | $94.33 | $88.38 | $88.62 | -4.71% | 5,243,362 |
| Feb 13, 2026 | $81.50 | $96.55 | $81.31 | $93.00 | +16.13% | 14,188,050 |
| Feb 12, 2026 | $79.97 | $87.00 | $66.57 | $80.08 | -39.85% | 23,558,140 |
| Feb 11, 2026 | $143.34 | $145.28 | $130.01 | $133.14 | -7.89% | 3,494,949 |
| Feb 10, 2026 | $154.40 | $154.99 | $144.01 | $144.55 | -6.48% | 1,515,345 |
| Feb 9, 2026 | $150.80 | $155.00 | $148.91 | $154.57 | +2.64% | 1,316,689 |
| Feb 6, 2026 | $145.23 | $153.15 | $144.51 | $150.59 | +3.58% | 1,775,730 |
| Feb 5, 2026 | $162.62 | $164.72 | $144.27 | $145.39 | -10.86% | 1,363,511 |
| Feb 4, 2026 | $167.67 | $168.99 | $162.87 | $163.11 | -2.86% | 1,858,472 |
| Feb 3, 2026 | $178.43 | $178.69 | $164.93 | $167.91 | -5.98% | 927,326 |
| Feb 2, 2026 | $180.25 | $180.51 | $175.07 | $178.59 | -0.92% | 1,108,139 |
| Jan 30, 2026 | $183.26 | $186.00 | $176.34 | $180.25 | -3.03% | 961,757 |
| Jan 29, 2026 | $185.03 | $186.27 | $180.03 | $185.89 | -0.23% | 555,448 |
| Jan 28, 2026 | $186.96 | $190.17 | $180.84 | $186.32 | -0.88% | 408,165 |
| Jan 27, 2026 | $186.93 | $191.00 | $186.93 | $187.97 | +0.29% | 591,551 |
| Jan 26, 2026 | $185.68 | $189.99 | $183.90 | $187.42 | +0.39% | 502,350 |
| Jan 23, 2026 | $186.83 | $189.72 | $184.75 | $186.70 | -0.02% | 515,759 |
| Jan 22, 2026 | $187.95 | $190.21 | $185.38 | $186.74 | +1.01% | 542,618 |
| Jan 21, 2026 | $176.55 | $185.44 | $175.18 | $184.87 | +4.70% | 1,186,075 |
| Jan 20, 2026 | $178.43 | $179.47 | $173.42 | $176.57 | -3.31% | 750,430 |
| Jan 16, 2026 | $181.91 | $188.00 | $181.44 | $182.61 | +0.03% | 1,397,309 |
| Jan 15, 2026 | $184.01 | $184.62 | $180.00 | $182.56 | -1.20% | 692,577 |
| Jan 14, 2026 | $184.17 | $185.99 | $183.22 | $184.77 | +0.81% | 785,086 |
| Jan 13, 2026 | $182.14 | $185.23 | $180.20 | $183.29 | +1.74% | 868,209 |
| Jan 12, 2026 | $182.98 | $183.02 | $177.47 | $180.15 | -0.68% | 886,994 |
| Jan 9, 2026 | $189.99 | $191.00 | $180.27 | $181.38 | -3.63% | 1,433,953 |
| Jan 8, 2026 | $179.07 | $190.53 | $171.99 | $188.22 | -7.24% | 3,340,765 |
| Jan 7, 2026 | $203.07 | $203.91 | $200.06 | $202.92 | +0.71% | 706,283 |
| Jan 6, 2026 | $198.22 | $202.78 | $197.39 | $201.48 | +1.97% | 1,132,224 |
| Jan 5, 2026 | $186.54 | $198.24 | $186.00 | $197.58 | +4.72% | 1,138,624 |
| Jan 2, 2026 | $183.95 | $189.53 | $182.48 | $188.67 | +3.54% | 677,638 |
| Dec 31, 2025 | $182.68 | $184.00 | $181.06 | $182.22 | -0.43% | 309,633 |
| Dec 30, 2025 | $181.74 | $183.16 | $180.48 | $183.00 | +0.35% | 377,525 |
| Dec 29, 2025 | $183.20 | $184.93 | $180.75 | $182.36 | -0.26% | 578,263 |
| Dec 26, 2025 | $183.85 | $183.91 | $180.89 | $182.84 | -0.46% | 245,571 |
| Dec 24, 2025 | $182.19 | $184.01 | $180.64 | $183.68 | +0.33% | 479,276 |
| Dec 23, 2025 | $177.98 | $183.33 | $177.31 | $183.07 | +2.19% | 693,082 |
| Dec 22, 2025 | $173.46 | $180.38 | $172.55 | $179.14 | +3.09% | 987,578 |
| Dec 19, 2025 | $177.94 | $178.75 | $172.79 | $173.77 | -2.76% | 1,411,860 |
| Dec 18, 2025 | $182.10 | $185.31 | $177.34 | $178.70 | -0.36% | 803,558 |
| Dec 17, 2025 | $182.48 | $184.29 | $179.06 | $179.34 | -1.70% | 451,364 |
| Dec 16, 2025 | $183.71 | $185.56 | $181.19 | $182.45 | -1.04% | 548,334 |
| Dec 15, 2025 | $184.94 | $189.23 | $181.89 | $184.37 | -1.18% | 1,571,130 |
| Dec 12, 2025 | $188.44 | $191.85 | $185.81 | $186.58 | -1.76% | 747,921 |
| Dec 11, 2025 | $187.22 | $190.26 | $185.69 | $189.93 | +2.19% | 778,158 |
| Dec 10, 2025 | $181.52 | $186.73 | $180.80 | $185.86 | +2.52% | 879,962 |
| Dec 9, 2025 | $182.69 | $184.20 | $178.80 | $181.29 | -0.44% | 629,615 |
| Dec 8, 2025 | $185.68 | $186.05 | $180.57 | $182.10 | -2.03% | 1,030,620 |
| Dec 5, 2025 | $186.61 | $188.99 | $180.95 | $185.87 | +0.05% | 905,324 |
| Dec 4, 2025 | $185.06 | $186.77 | $174.13 | $185.77 | -1.07% | 1,654,494 |
| Dec 3, 2025 | $181.61 | $191.15 | $181.61 | $187.78 | +2.53% | 1,031,248 |
| Dec 2, 2025 | $179.88 | $185.77 | $178.03 | $183.14 | +1.91% | 912,765 |
| Dec 1, 2025 | $183.80 | $187.57 | $177.12 | $179.71 | -2.86% | 1,340,479 |
| Nov 28, 2025 | $182.64 | $186.57 | $181.77 | $185.00 | +0.74% | 671,417 |
| Nov 26, 2025 | $175.64 | $184.09 | $173.88 | $183.65 | +5.23% | 1,628,519 |
| Nov 25, 2025 | $165.73 | $176.07 | $164.59 | $174.53 | +6.07% | 1,445,021 |
| Nov 24, 2025 | $163.11 | $165.75 | $161.75 | $164.55 | -0.01% | 799,503 |
| Nov 21, 2025 | $157.76 | $165.49 | $155.66 | $164.56 | +4.07% | 1,336,906 |
| Nov 20, 2025 | $158.74 | $162.97 | $154.20 | $158.12 | -0.43% | 1,413,791 |
| Nov 19, 2025 | $161.74 | $164.41 | $157.36 | $158.81 | -1.37% | 1,386,598 |
| Nov 18, 2025 | $155.58 | $162.00 | $154.12 | $161.02 | +2.89% | 612,880 |
| Nov 17, 2025 | $160.91 | $162.38 | $156.34 | $156.49 | -3.51% | 1,030,085 |
| Nov 14, 2025 | $163.01 | $165.47 | $158.08 | $162.18 | -0.78% | 572,120 |
| Nov 13, 2025 | $161.25 | $166.32 | $161.25 | $163.45 | +0.02% | 453,392 |
| Nov 12, 2025 | $164.57 | $167.43 | $163.27 | $163.42 | 0.00% | 566,999 |
| Nov 11, 2025 | $159.51 | $164.82 | $157.23 | $163.42 | +3.64% | 806,086 |
| Nov 10, 2025 | $158.03 | $159.76 | $156.05 | $157.68 | -0.92% | 907,914 |
| Nov 7, 2025 | $159.76 | $159.76 | $155.00 | $159.14 | -0.54% | 627,735 |
| Nov 6, 2025 | $163.72 | $168.28 | $159.77 | $160.00 | -2.26% | 570,265 |
| Nov 5, 2025 | $161.75 | $165.04 | $158.55 | $163.70 | +0.45% | 507,072 |
| Nov 4, 2025 | $166.89 | $168.67 | $162.83 | $162.96 | -3.45% | 654,128 |
| Nov 3, 2025 | $169.19 | $170.95 | $166.20 | $168.79 | -1.76% | 745,860 |
| Oct 31, 2025 | $163.42 | $172.99 | $163.42 | $171.82 | +3.93% | 975,037 |
| Oct 30, 2025 | $164.72 | $166.35 | $162.36 | $165.33 | -0.37% | 898,471 |
| Oct 29, 2025 | $175.55 | $177.51 | $165.10 | $165.95 | -6.63% | 1,283,669 |
| Oct 28, 2025 | $180.61 | $180.72 | $174.54 | $177.73 | -2.36% | 1,019,490 |
| Oct 27, 2025 | $178.11 | $184.57 | $175.13 | $182.03 | +2.20% | 905,751 |
| Oct 24, 2025 | $179.22 | $179.83 | $173.94 | $178.11 | -1.05% | 1,165,433 |
| Oct 23, 2025 | $189.00 | $193.00 | $173.38 | $180.00 | -6.54% | 2,237,354 |
| Oct 22, 2025 | $194.74 | $197.92 | $189.00 | $192.60 | -0.34% | 1,844,845 |
| Oct 21, 2025 | $187.68 | $198.30 | $184.24 | $193.26 | +2.55% | 1,496,348 |
| Oct 20, 2025 | $187.45 | $190.36 | $185.50 | $188.45 | – | 1,028,700 |
Seasonality
ICLR return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 1.1% | -5.0% | -1.1% | -0.1% | 5.2% | 5.8% | 6.9% | 1.4% | -2.3% | 0.4% | 4.1% | -0.0% |
| Months up | 4 of 10 | 3 of 10 | 5 of 10 | 4 of 10 | 8 of 10 | 7 of 10 | 9 of 10 | 7 of 10 | 5 of 10 | 4 of 10 | 6 of 9 | 4 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% |
| 2023 | 18.8% | -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% |
| 2021 | 4.5% | -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% |
| 2019 | 8.3% | 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% |
| 2017 | 11.8% | -0.3% | -4.8% | 6.0% | 11.4% | 3.9% | 7.3% | 8.0% | 0.4% | 4.4% | -1.7% | -4.0% |