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 month, 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
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $169.99 | $219.04 | $157.38 | $211.36 | +24.34% | 24,749,196 |
| Sep 2026 | $165.24 | $177.50 | $156.70 | $169.99 | +3.03% | 22,165,754 |
| Aug 2026 | $165.31 | $180.89 | $150.86 | $164.99 | +0.87% | 11,820,389 |
| Jul 2026 | $174.00 | $186.64 | $161.29 | $163.57 | -5.84% | 17,955,994 |
| Jun 2026 | $133.70 | $181.00 | $132.36 | $173.71 | +27.66% | 24,999,360 |
| May 2026 | $119.66 | $139.69 | $108.80 | $136.07 | +14.99% | 21,418,586 |
| Apr 2026 | $110.83 | $121.03 | $99.06 | $118.33 | +6.93% | 28,194,404 |
| Mar 2026 | $105.81 | $113.88 | $95.75 | $110.66 | +2.33% | 23,536,127 |
| Feb 2026 | $180.25 | $180.51 | $66.57 | $108.14 | -40.01% | 71,033,888 |
| Jan 2026 | $183.95 | $203.91 | $171.99 | $180.25 | -1.08% | 19,073,815 |
| Dec 2025 | $183.80 | $191.85 | $172.55 | $182.22 | -1.50% | 18,367,760 |
| Nov 2025 | $169.19 | $186.57 | $154.12 | $185.00 | +7.67% | 16,736,291 |
| Oct 2025 | $174.70 | $198.30 | $162.36 | $171.82 | -1.82% | 23,945,678 |
| Sep 2025 | $176.65 | $183.46 | $161.01 | $175.00 | -1.65% | 23,443,492 |
| Aug 2025 | $167.63 | $181.51 | $154.69 | $177.94 | +5.17% | 19,738,622 |
| Jul 2025 | $144.87 | $211.00 | $139.15 | $169.19 | +16.32% | 36,995,090 |
| Jun 2025 | $130.14 | $150.00 | $126.14 | $145.45 | +11.64% | 24,551,734 |
| May 2025 | $142.61 | $151.99 | $125.10 | $130.28 | -13.97% | 36,648,777 |
| Apr 2025 | $175.88 | $175.88 | $133.28 | $151.44 | -13.46% | 36,257,007 |
| Mar 2025 | $179.50 | $189.30 | $168.00 | $174.99 | -7.91% | 20,960,810 |
| Feb 2025 | $194.19 | $208.95 | $181.51 | $190.02 | -4.55% | 18,845,765 |
| Jan 2025 | $212.52 | $228.29 | $194.33 | $199.08 | -5.07% | 19,399,920 |
| Dec 2024 | $211.00 | $222.58 | $200.69 | $209.71 | -0.26% | 20,701,785 |
| Nov 2024 | $222.44 | $231.89 | $183.38 | $210.25 | -5.34% | 32,596,889 |
| Oct 2024 | $287.31 | $303.69 | $220.01 | $222.11 | -22.69% | 29,043,963 |
| Sep 2024 | $319.05 | $323.25 | $269.09 | $287.31 | -10.79% | 15,463,840 |
| Aug 2024 | $328.24 | $331.53 | $300.01 | $322.06 | -1.94% | 7,442,804 |
| Jul 2024 | $316.43 | $347.72 | $288.43 | $328.44 | +4.78% | 12,970,596 |
| Jun 2024 | $322.81 | $331.04 | $308.47 | $313.47 | -3.49% | 14,358,517 |
| May 2024 | $297.27 | $332.52 | $295.75 | $324.82 | +9.04% | 10,977,385 |
| Apr 2024 | $337.00 | $338.98 | $287.02 | $297.88 | -11.33% | 12,147,372 |
| Mar 2024 | $319.88 | $344.77 | $317.79 | $335.95 | +4.78% | 9,814,311 |
| Feb 2024 | $262.26 | $326.03 | $256.21 | $320.62 | +22.90% | 12,560,393 |
| Jan 2024 | $280.54 | $283.85 | $244.59 | $260.87 | -7.84% | 12,400,736 |
| Dec 2023 | $266.43 | $288.50 | $261.92 | $283.07 | +6.04% | 9,264,114 |
| Nov 2023 | $244.10 | $276.68 | $238.17 | $266.94 | +9.42% | 9,177,962 |
| Oct 2023 | $245.70 | $253.77 | $221.20 | $243.96 | -0.93% | 14,568,316 |
| Sep 2023 | $262.54 | $268.00 | $243.85 | $246.25 | -5.27% | 9,470,194 |
| Aug 2023 | $249.33 | $268.07 | $245.91 | $259.94 | +3.39% | 11,295,015 |
| Jul 2023 | $249.25 | $259.01 | $233.81 | $251.41 | +0.48% | 15,152,059 |
| Jun 2023 | $212.46 | $252.15 | $210.44 | $250.20 | +17.45% | 17,923,438 |
| May 2023 | $192.68 | $217.59 | $181.92 | $213.03 | +10.56% | 16,054,961 |
| Apr 2023 | $212.26 | $216.35 | $186.21 | $192.69 | -9.79% | 11,895,127 |
| Mar 2023 | $223.94 | $238.45 | $200.20 | $213.59 | -5.34% | 11,725,560 |
| Feb 2023 | $229.78 | $247.47 | $216.79 | $225.63 | -2.20% | 10,270,246 |
| Jan 2023 | $196.95 | $236.05 | $190.73 | $230.71 | +18.77% | 10,013,724 |
| Dec 2022 | $215.60 | $220.92 | $184.88 | $194.25 | -9.84% | 11,026,029 |
| Nov 2022 | $201.01 | $229.84 | $190.40 | $215.44 | +8.90% | 12,421,649 |
| Oct 2022 | $183.84 | $202.25 | $171.43 | $197.84 | +7.65% | 14,581,182 |
| Sep 2022 | $208.79 | $234.40 | $179.95 | $183.78 | -12.41% | 11,803,721 |
| Aug 2022 | $234.29 | $249.24 | $208.33 | $209.83 | -13.02% | 9,686,422 |
| Jul 2022 | $215.54 | $249.62 | $198.75 | $241.25 | +11.33% | 8,959,624 |
| Jun 2022 | $222.04 | $234.32 | $196.34 | $216.70 | -3.17% | 11,009,591 |
| May 2022 | $219.63 | $233.53 | $199.01 | $223.79 | -1.07% | 10,111,601 |
| Apr 2022 | $243.02 | $263.62 | $210.35 | $226.21 | -6.99% | 10,046,316 |
| Mar 2022 | $238.29 | $252.12 | $212.32 | $243.22 | +2.19% | 14,539,419 |
| Feb 2022 | $267.37 | $279.80 | $208.13 | $238.01 | -10.43% | 14,064,363 |
| Jan 2022 | $308.17 | $312.28 | $245.28 | $265.72 | -14.20% | 13,452,738 |
| Dec 2021 | $274.42 | $313.00 | $264.64 | $309.70 | +14.50% | 10,007,453 |
| Nov 2021 | $288.38 | $291.56 | $264.29 | $270.47 | -5.68% | 8,788,468 |
| Oct 2021 | $260.87 | $287.72 | $254.34 | $286.77 | +9.45% | 7,773,703 |
| Sep 2021 | $255.32 | $301.72 | $254.55 | $262.02 | +2.44% | 9,828,915 |
| Aug 2021 | $245.50 | $257.33 | $232.72 | $255.77 | +5.14% | 13,152,198 |
| Jul 2021 | $208.17 | $245.50 | $205.10 | $243.27 | +17.69% | 30,162,759 |
| Jun 2021 | $226.74 | $226.74 | $204.80 | $206.71 | -7.62% | 18,338,241 |
| May 2021 | $218.57 | $234.22 | $211.23 | $223.76 | +3.14% | 11,434,983 |
| Apr 2021 | $199.59 | $219.54 | $193.25 | $216.95 | +10.48% | 13,035,100 |
| Mar 2021 | $186.53 | $199.02 | $168.76 | $196.37 | +8.68% | 19,477,086 |
| Feb 2021 | $205.41 | $216.25 | $179.54 | $180.68 | -11.35% | 10,437,110 |
| Jan 2021 | $196.70 | $223.62 | $190.97 | $203.81 | +4.53% | 4,129,585 |
| Dec 2020 | $197.39 | $203.81 | $187.27 | $194.98 | +0.05% | 4,359,897 |
| Nov 2020 | $182.87 | $207.98 | $182.87 | $194.88 | +8.09% | 3,664,111 |
| Oct 2020 | $192.99 | $215.29 | $177.52 | $180.30 | -5.65% | 5,136,594 |
| Sep 2020 | $187.92 | $192.36 | $170.27 | $191.09 | +2.51% | 4,094,014 |
| Aug 2020 | $187.00 | $194.19 | $180.15 | $186.41 | +0.51% | 3,518,986 |
| Jul 2020 | $170.51 | $199.83 | $166.66 | $185.46 | +10.09% | 4,990,847 |
| Jun 2020 | $167.64 | $173.77 | $155.28 | $168.46 | +0.01% | 5,093,525 |
| May 2020 | $158.33 | $171.79 | $145.11 | $168.45 | +4.97% | 5,151,910 |
| Apr 2020 | $132.26 | $163.87 | $127.00 | $160.47 | +17.99% | 7,060,488 |
| Mar 2020 | $157.00 | $167.94 | $104.28 | $136.00 | -12.85% | 10,591,176 |
| Feb 2020 | $169.94 | $178.99 | $150.77 | $156.06 | -7.45% | 4,441,365 |
| Jan 2020 | $172.75 | $176.98 | $165.94 | $168.62 | -2.10% | 4,705,655 |
| Dec 2019 | $163.80 | $172.45 | $153.06 | $172.23 | +5.56% | 5,627,604 |
| Nov 2019 | $147.73 | $163.95 | $143.77 | $163.16 | +11.07% | 4,807,893 |
| Oct 2019 | $147.21 | $152.06 | $138.50 | $146.90 | -0.30% | 6,288,237 |
| Sep 2019 | $153.28 | $157.61 | $145.33 | $147.34 | -4.44% | 4,145,148 |
| Aug 2019 | $155.84 | $158.86 | $149.42 | $154.19 | -1.27% | 4,483,987 |
| Jul 2019 | $155.50 | $165.14 | $148.27 | $156.17 | +1.43% | 4,950,445 |
| Jun 2019 | $141.49 | $154.40 | $138.26 | $153.97 | +8.77% | 5,325,190 |
| May 2019 | $136.91 | $144.14 | $133.94 | $141.56 | +3.65% | 6,302,631 |
| Apr 2019 | $137.49 | $140.56 | $128.52 | $136.58 | 0.00% | 5,276,809 |
| Mar 2019 | $140.75 | $142.68 | $127.58 | $136.58 | -2.43% | 8,276,548 |
| Feb 2019 | $141.15 | $147.31 | $137.70 | $139.98 | +0.07% | 5,042,892 |
| Jan 2019 | $127.93 | $140.77 | $118.10 | $139.88 | +8.26% | 6,151,466 |
| Dec 2018 | $145.25 | $148.94 | $119.08 | $129.21 | -10.72% | 6,302,310 |
| Nov 2018 | $138.53 | $144.97 | $122.73 | $144.72 | +4.81% | 5,097,993 |
| Oct 2018 | $154.82 | $155.33 | $119.62 | $138.08 | -10.19% | 6,436,833 |
| Sep 2018 | $148.35 | $154.10 | $143.95 | $153.75 | +3.17% | 3,884,490 |
| Aug 2018 | $140.07 | $150.06 | $137.85 | $149.02 | +7.09% | 4,676,031 |
| Jul 2018 | $131.99 | $146.31 | $130.22 | $139.16 | +5.00% | 5,442,422 |
| Jun 2018 | $129.99 | $138.17 | $127.98 | $132.53 | +2.75% | 4,111,469 |
| May 2018 | $117.11 | $129.71 | $116.68 | $128.98 | +9.65% | 4,609,857 |
| Apr 2018 | $118.65 | $123.33 | $110.21 | $117.63 | -0.43% | 5,631,474 |
| Mar 2018 | $113.36 | $124.65 | $110.26 | $118.14 | +4.26% | 5,939,969 |
| Feb 2018 | $109.50 | $118.43 | $101.22 | $113.31 | +3.46% | 7,173,366 |
| Jan 2018 | $112.04 | $119.05 | $109.08 | $109.52 | -2.35% | 6,533,242 |
| Dec 2017 | $116.13 | $117.39 | $110.54 | $112.15 | -3.99% | 5,437,798 |
| Nov 2017 | $118.95 | $124.48 | $110.55 | $116.81 | -1.72% | 5,647,872 |
| Oct 2017 | $113.94 | $123.53 | $111.86 | $118.86 | +4.37% | 6,365,332 |
| Sep 2017 | $114.29 | $117.53 | $109.78 | $113.88 | +0.43% | 6,556,764 |
| Aug 2017 | $104.50 | $114.27 | $101.00 | $113.39 | +8.04% | 6,926,607 |
| Jul 2017 | $97.50 | $109.32 | $96.03 | $104.95 | +7.32% | 7,114,610 |
| Jun 2017 | $94.55 | $100.87 | $90.01 | $97.79 | +3.92% | 8,345,723 |
| May 2017 | $84.74 | $94.17 | $84.07 | $94.10 | +11.37% | 8,158,540 |
| Apr 2017 | $80.00 | $85.69 | $76.46 | $84.49 | +5.98% | 8,168,405 |
| Mar 2017 | $84.57 | $85.09 | $77.16 | $79.72 | -4.83% | 10,757,346 |
| Feb 2017 | $84.43 | $88.90 | $80.41 | $83.77 | -0.34% | 7,200,272 |
| Jan 2017 | $75.82 | $84.36 | $74.30 | $84.06 | +11.78% | 8,246,119 |
| Dec 2016 | $75.45 | $77.82 | $73.76 | $75.20 | -0.58% | 7,659,532 |
| Nov 2016 | $79.00 | $83.00 | $74.03 | $75.64 | -5.78% | 12,062,471 |
| Oct 2016 | $77.49 | $85.74 | $76.09 | $80.28 | +3.76% | 9,750,272 |
| Sep 2016 | $77.00 | $78.47 | $74.26 | $77.37 | +0.76% | 7,054,700 |
| Aug 2016 | $77.65 | $78.37 | $74.39 | $76.79 | -1.13% | 7,751,100 |
| Jul 2016 | $70.28 | $79.61 | $69.05 | $77.67 | +10.94% | 10,847,900 |
| Jun 2016 | $70.63 | $72.47 | $63.94 | $70.01 | -0.61% | 11,902,200 |
| May 2016 | $67.61 | $70.60 | $62.31 | $70.44 | +4.23% | 10,243,500 |
| Apr 2016 | $75.00 | $77.08 | $64.04 | $67.58 | -10.01% | 9,899,700 |
| Mar 2016 | $71.69 | $75.61 | $68.50 | $75.10 | +5.54% | 7,508,400 |
| Feb 2016 | $65.93 | $71.93 | $64.43 | $71.16 | +7.70% | 10,009,200 |
| Jan 2016 | $77.55 | $77.79 | $64.08 | $66.07 | -14.97% | 7,577,000 |
| Dec 2015 | $74.89 | $78.88 | $71.90 | $77.70 | +4.53% | 8,759,200 |
| Nov 2015 | $64.39 | $75.01 | $63.92 | $74.33 | +16.38% | 9,643,800 |
| Oct 2015 | $71.33 | $74.12 | $63.20 | $63.87 | -10.00% | 12,554,300 |
| Sep 2015 | $75.45 | $82.47 | $67.47 | $70.97 | -7.83% | 10,893,500 |
| Aug 2015 | $80.85 | $84.14 | $71.08 | $77.00 | -4.70% | 14,944,300 |
| Jul 2015 | $67.74 | $81.90 | $64.27 | $80.80 | +20.06% | 13,278,200 |
| Jun 2015 | $65.05 | $71.80 | $64.15 | $67.30 | +3.75% | 10,231,200 |
| May 2015 | $64.28 | $69.41 | $63.44 | $64.87 | +0.82% | 10,387,200 |
| Apr 2015 | $70.76 | $71.51 | $62.36 | $64.34 | -8.78% | 11,327,300 |
| Mar 2015 | $69.20 | $72.40 | $66.21 | $70.53 | +2.20% | 8,069,500 |
| Feb 2015 | $57.06 | $70.03 | $55.26 | $69.01 | +22.36% | 8,258,700 |
| Jan 2015 | $51.03 | $58.87 | $50.91 | $56.40 | +10.61% | 8,017,200 |
| Dec 2014 | $54.80 | $55.25 | $49.75 | $50.99 | -8.19% | 8,984,000 |
| Nov 2014 | $53.47 | $56.17 | $51.44 | $55.54 | +5.57% | 10,217,300 |
| Oct 2014 | $57.25 | $59.81 | $50.62 | $52.61 | -8.07% | 15,808,400 |
| Sep 2014 | $50.01 | $57.98 | $49.67 | $57.23 | +15.52% | 10,333,400 |
| Aug 2014 | $51.69 | $53.50 | $49.51 | $49.54 | -4.36% | 8,815,300 |
| Jul 2014 | $47.50 | $52.97 | $45.50 | $51.80 | +9.96% | 8,925,000 |
| Jun 2014 | $42.45 | $48.09 | $41.53 | $47.11 | +11.45% | 10,902,900 |
| May 2014 | $39.59 | $43.47 | $37.79 | $42.27 | +9.03% | 15,292,600 |
| Apr 2014 | $47.74 | $49.39 | $35.33 | $38.77 | -18.46% | 15,367,100 |
| Mar 2014 | $46.39 | $49.71 | $45.00 | $47.55 | +1.52% | 7,652,700 |
| Feb 2014 | $42.20 | $50.00 | $41.51 | $46.84 | +11.50% | 11,261,200 |
| Jan 2014 | $40.31 | $42.95 | $38.91 | $42.01 | +3.93% | 7,942,100 |
| Dec 2013 | $38.18 | $40.59 | $36.42 | $40.42 | +5.98% | 7,695,500 |
| Nov 2013 | $40.74 | $41.44 | $37.32 | $38.14 | -5.80% | 6,854,400 |
| Oct 2013 | $41.13 | $44.23 | $38.51 | $40.49 | -1.08% | 8,318,000 |
| Sep 2013 | $36.84 | $41.29 | $35.51 | $40.93 | +12.01% | 5,976,600 |
| Aug 2013 | $39.33 | $40.98 | $36.23 | $36.54 | -6.83% | 5,788,000 |
| Jul 2013 | $35.83 | $40.23 | $35.50 | $39.22 | +10.70% | 6,065,100 |
| Jun 2013 | $34.14 | $36.71 | $33.44 | $35.43 | +3.17% | 5,644,800 |
| May 2013 | $31.95 | $35.57 | $31.74 | $34.34 | +6.91% | 7,927,100 |
| Apr 2013 | $31.87 | $35.86 | $29.07 | $32.12 | -0.53% | 9,289,900 |
| Mar 2013 | $30.97 | $33.07 | $30.60 | $32.29 | +3.63% | 5,292,100 |
| Feb 2013 | $29.30 | $31.72 | $26.70 | $31.16 | +6.31% | 6,995,300 |
| Jan 2013 | $28.13 | $29.75 | $27.55 | $29.31 | +5.58% | 7,123,400 |
| Dec 2012 | $27.51 | $28.93 | $26.96 | $27.76 | +0.62% | 5,564,400 |
| Nov 2012 | $24.02 | $28.06 | $23.97 | $27.59 | +17.20% | 8,044,500 |
| Oct 2012 | $24.50 | $25.16 | $23.05 | $23.54 | -3.41% | 3,503,800 |
| Sep 2012 | $22.85 | $25.21 | $22.43 | $24.37 | +6.33% | 3,596,800 |
| Aug 2012 | $24.25 | $25.03 | $22.50 | $22.92 | -5.01% | 3,090,500 |
| Jul 2012 | $22.55 | $24.81 | $21.71 | $24.13 | +7.10% | 3,811,700 |
| Jun 2012 | $21.29 | $22.95 | $20.25 | $22.53 | +4.94% | 4,444,900 |
| May 2012 | $22.07 | $23.00 | $21.25 | $21.47 | -3.20% | 4,243,500 |
| Apr 2012 | $21.20 | $23.81 | $20.02 | $22.18 | +4.52% | 4,898,300 |
| Mar 2012 | $21.16 | $22.33 | $20.69 | $21.22 | +0.19% | 3,698,600 |
| Feb 2012 | $19.75 | $21.87 | $19.24 | $21.18 | +8.50% | 3,852,300 |
| Jan 2012 | $17.34 | $20.00 | $16.73 | $19.52 | +14.09% | 4,089,800 |
| Dec 2011 | $16.94 | $17.34 | $15.57 | $17.11 | +0.59% | 5,096,000 |
| Nov 2011 | $16.31 | $17.73 | $16.20 | $17.01 | +1.25% | 4,138,500 |
| Oct 2011 | $16.00 | $18.28 | $15.03 | $16.80 | +4.48% | 9,585,900 |
| Sep 2011 | $21.25 | $21.81 | $15.98 | $16.08 | -24.54% | 7,483,500 |
| Aug 2011 | $22.50 | $22.50 | $18.53 | $21.31 | -4.57% | 7,688,600 |
| Jul 2011 | $23.49 | $25.50 | $21.95 | $22.33 | -5.22% | 6,708,500 |
| Jun 2011 | $25.30 | $26.22 | $22.61 | $23.56 | -7.93% | 4,946,800 |
| May 2011 | $24.52 | $26.04 | $23.16 | $25.59 | +4.19% | 4,265,500 |
| Apr 2011 | $22.08 | $24.75 | $21.03 | $24.56 | +13.76% | 4,470,200 |
| Mar 2011 | $19.85 | $22.37 | $19.61 | $21.59 | +8.55% | 7,553,000 |
| Feb 2011 | $22.40 | $22.86 | $19.61 | $19.89 | -10.69% | 10,356,800 |
| Jan 2011 | $22.13 | $24.26 | $21.37 | $22.27 | +1.69% | 6,489,000 |
| Dec 2010 | $20.56 | $22.28 | $19.07 | $21.90 | +8.96% | 6,975,200 |
| Nov 2010 | $19.32 | $20.79 | $19.11 | $20.10 | +3.88% | 9,083,600 |
| Oct 2010 | $21.64 | $22.18 | $18.93 | $19.35 | -10.50% | 16,235,400 |
| Sep 2010 | $22.30 | $24.10 | $20.33 | $21.62 | -1.73% | 6,888,300 |
| Aug 2010 | $23.71 | $24.71 | $21.22 | $22.00 | -6.78% | 7,510,500 |
| Jul 2010 | $28.90 | $28.90 | $22.71 | $23.60 | -18.31% | 7,421,400 |
| Jun 2010 | $27.77 | $30.31 | $26.01 | $28.89 | +3.88% | 6,819,500 |
| May 2010 | $28.97 | $29.62 | $25.29 | $27.81 | -4.66% | 7,089,300 |
| Apr 2010 | $26.68 | $29.63 | $26.03 | $29.17 | +10.45% | 9,888,100 |
| Mar 2010 | $23.02 | $27.56 | $22.76 | $26.41 | +12.14% | 11,303,500 |
| Feb 2010 | $25.01 | $26.01 | $22.32 | $23.55 | -5.19% | 6,135,500 |
| Jan 2010 | $21.80 | $26.16 | $21.20 | $24.84 | +14.31% | 12,183,800 |
| Dec 2009 | $22.75 | $23.41 | $21.00 | $21.73 | -4.27% | 6,410,900 |
| Nov 2009 | $24.57 | $25.24 | $22.15 | $22.70 | -8.10% | 5,218,000 |
| Oct 2009 | $24.22 | $26.85 | $21.84 | $24.70 | +0.86% | 11,727,100 |
| Sep 2009 | $21.50 | $25.35 | $21.45 | $24.49 | +13.27% | 7,285,300 |
| Aug 2009 | $23.99 | $24.59 | $21.11 | $21.62 | -8.00% | 3,669,000 |
| Jul 2009 | $21.60 | $23.85 | $20.25 | $23.50 | +8.90% | 9,740,200 |
| Jun 2009 | $17.74 | $22.46 | $17.25 | $21.58 | +23.74% | 9,704,200 |
| May 2009 | $15.85 | $17.94 | $14.45 | $17.44 | +10.10% | 9,273,000 |
| Apr 2009 | $16.22 | $18.59 | $12.17 | $15.84 | -1.92% | 24,123,900 |
| Mar 2009 | $20.10 | $21.41 | $15.07 | $16.15 | -21.30% | 12,539,100 |
| Feb 2009 | $19.67 | $24.77 | $19.50 | $20.52 | +2.09% | 7,865,000 |
| Jan 2009 | $19.79 | $22.99 | $18.25 | $20.10 | +2.08% | 11,440,400 |
| Dec 2008 | $20.00 | $24.37 | $17.27 | $19.69 | -7.08% | 11,574,400 |
| Nov 2008 | $25.57 | $27.90 | $15.64 | $21.19 | -16.48% | 12,200,100 |
| Oct 2008 | $38.49 | $39.66 | $18.67 | $25.37 | -33.67% | 23,867,500 |
| Sep 2008 | $41.47 | $43.75 | $35.00 | $38.25 | -6.09% | 6,149,500 |
| Aug 2008 | $40.55 | $44.78 | $40.00 | $40.73 | +1.39% | 4,448,700 |
| Jul 2008 | $38.08 | $42.10 | $36.07 | $40.17 | +6.38% | 5,990,000 |
| Jun 2008 | $35.02 | $39.12 | $33.41 | $37.76 | +7.12% | 4,789,200 |
| May 2008 | $35.97 | $37.69 | $34.48 | $35.25 | -2.08% | 5,529,400 |
| Apr 2008 | $32.40 | $36.45 | $29.52 | $36.00 | +10.96% | 9,822,000 |
| Mar 2008 | $33.05 | $34.37 | $28.97 | $32.45 | -1.83% | 5,719,400 |
| Feb 2008 | $31.33 | $35.56 | $29.01 | $33.05 | +5.46% | 7,189,000 |
| Jan 2008 | $31.20 | $34.92 | $28.63 | $31.34 | +1.33% | 5,910,800 |
| Dec 2007 | $29.53 | $32.40 | $27.32 | $30.93 | +4.30% | 5,345,200 |
| Nov 2007 | $28.92 | $30.39 | $27.25 | $29.66 | +2.26% | 6,105,200 |
| Oct 2007 | $25.36 | $30.65 | $25.36 | $29.00 | +13.66% | 6,911,600 |
| Sep 2007 | $22.88 | $26.63 | $22.78 | $25.52 | +11.71% | 3,079,000 |
| Aug 2007 | $23.50 | $24.42 | $21.26 | $22.84 | -2.33% | 6,310,000 |
| Jul 2007 | $22.05 | $23.87 | $21.50 | $23.39 | +6.93% | 3,796,000 |
| Jun 2007 | $23.21 | $23.59 | $20.83 | $21.87 | -5.71% | 5,853,600 |
| May 2007 | $23.38 | $24.83 | $22.54 | $23.20 | -1.15% | 4,902,000 |
| Apr 2007 | $21.25 | $24.21 | $20.97 | $23.47 | +10.16% | 4,207,200 |
| Mar 2007 | $20.66 | $22.30 | $19.83 | $21.30 | +2.43% | 4,923,800 |
| Feb 2007 | $18.75 | $21.92 | $18.52 | $20.80 | +11.50% | 4,938,800 |
| Jan 2007 | $19.12 | $20.25 | $18.34 | $18.65 | -1.06% | 4,643,400 |
| Dec 2006 | $18.58 | $19.12 | $17.32 | $18.85 | +1.37% | 4,547,400 |
| Nov 2006 | $17.94 | $20.18 | $16.79 | $18.60 | +3.65% | 5,600,600 |
| Oct 2006 | $17.88 | $19.43 | $17.15 | $17.94 | +1.67% | 7,849,800 |
| Sep 2006 | $17.34 | $17.99 | $16.57 | $17.65 | +2.51% | 4,915,200 |
| Aug 2006 | $16.20 | $18.00 | $16.07 | $17.21 | +4.57% | 8,290,000 |
| Jul 2006 | $13.63 | $17.00 | $13.63 | $16.46 | +19.06% | 11,869,200 |
| Jun 2006 | $13.17 | $13.97 | $12.18 | $13.83 | +4.05% | 3,616,400 |
| May 2006 | $13.69 | $14.33 | $12.94 | $13.29 | -2.49% | 5,772,000 |
| Apr 2006 | $12.24 | $13.63 | $11.68 | $13.63 | +11.50% | 3,829,200 |
| Mar 2006 | $11.97 | $12.25 | $11.13 | $12.22 | +1.85% | 1,937,600 |
| Feb 2006 | $10.95 | $12.13 | $10.90 | $12.00 | +9.17% | 2,346,800 |
| Jan 2006 | $10.27 | $11.13 | $10.25 | $10.99 | +6.88% | 2,248,800 |
| Dec 2005 | $10.45 | $11.00 | $9.97 | $10.29 | -0.70% | 1,126,800 |
| Nov 2005 | $10.05 | $10.44 | $9.09 | $10.36 | +2.52% | 1,228,000 |
| Oct 2005 | $12.26 | $12.39 | $9.98 | $10.10 | -19.18% | 2,452,800 |
| Sep 2005 | $10.14 | $12.62 | $10.10 | $12.50 | +23.33% | 2,688,800 |
| Aug 2005 | $9.69 | $10.47 | $9.56 | $10.14 | +3.55% | 2,404,800 |
| Jul 2005 | $8.60 | $9.92 | $8.55 | $9.79 | +12.99% | 1,571,600 |
| Jun 2005 | $7.58 | $8.89 | $7.53 | $8.66 | +14.51% | 2,936,400 |
| May 2005 | $8.26 | $8.53 | $7.43 | $7.57 | -8.97% | 4,553,200 |
| Apr 2005 | $9.26 | $9.74 | $8.13 | $8.31 | -11.41% | 3,852,000 |
| Mar 2005 | $8.84 | $9.75 | $8.57 | $9.38 | +4.78% | 3,535,200 |
| Feb 2005 | $8.60 | $9.07 | $8.10 | $8.95 | +1.96% | 5,129,200 |
| Jan 2005 | $9.72 | $9.72 | $8.08 | $8.78 | -8.52% | 6,962,000 |
| Dec 2004 | $9.48 | $9.87 | $9.25 | $9.60 | +3.06% | 3,811,200 |
| Nov 2004 | $8.45 | $9.87 | $8.09 | $9.31 | +12.81% | 5,140,400 |
| Oct 2004 | $8.23 | $8.45 | $7.66 | $8.26 | +0.30% | 5,200,800 |
| Sep 2004 | $9.00 | $9.25 | $7.77 | $8.23 | -8.73% | 7,852,800 |
| Aug 2004 | $9.26 | $9.26 | $8.52 | $9.02 | -2.49% | 2,894,400 |
| Jul 2004 | $11.02 | $11.35 | $7.94 | $9.25 | -16.48% | 8,984,400 |
| Jun 2004 | $9.76 | $11.08 | $9.50 | $11.07 | +13.56% | 3,228,000 |
| May 2004 | $10.25 | $10.51 | $9.18 | $9.75 | -2.40% | 2,896,400 |
| Apr 2004 | $9.19 | $10.87 | $8.86 | $9.99 | +12.75% | 4,490,800 |
| Mar 2004 | $8.35 | $9.30 | $7.44 | $8.86 | +6.46% | 10,326,400 |
| Feb 2004 | $9.25 | $9.74 | $8.26 | $8.32 | -9.41% | 5,887,600 |
| Jan 2004 | $10.63 | $11.51 | $8.64 | $9.19 | -15.71% | 9,755,200 |
| Dec 2003 | $10.62 | $11.29 | $10.08 | $10.90 | +4.03% | 2,574,400 |
| Nov 2003 | $10.70 | $11.06 | $9.29 | $10.48 | -1.87% | 3,831,600 |
| Oct 2003 | $9.50 | $11.26 | $9.25 | $10.68 | +13.32% | 5,579,600 |
| Sep 2003 | $9.29 | $9.61 | $7.80 | $9.42 | +2.56% | 4,902,400 |
| Aug 2003 | $8.55 | $9.19 | $7.88 | $9.19 | +5.45% | 11,434,800 |
| Jul 2003 | $7.91 | $9.20 | $7.14 | $8.71 | +9.52% | 6,926,000 |
| Jun 2003 | $6.88 | $7.96 | $6.47 | $7.96 | +16.09% | 2,792,800 |
| May 2003 | $6.49 | $7.71 | $6.03 | $6.85 | +5.83% | 3,016,400 |
| Apr 2003 | $6.00 | $6.48 | $5.34 | $6.48 | +8.82% | 4,740,000 |
| Mar 2003 | $6.44 | $6.63 | $5.88 | $5.95 | -8.43% | 3,090,000 |
| Feb 2003 | $6.95 | $6.96 | $5.72 | $6.50 | -7.18% | 4,122,400 |
| Jan 2003 | $7.12 | $8.22 | $6.70 | $7.00 | +4.05% | 4,591,200 |
| Dec 2002 | $5.96 | $6.85 | $5.59 | $6.73 | +15.49% | 2,544,000 |
| Nov 2002 | $6.24 | $6.50 | $5.50 | $5.83 | -3.44% | 2,464,800 |
| Oct 2002 | $5.38 | $6.42 | $4.75 | $6.03 | +12.76% | 2,990,800 |
| Sep 2002 | $5.08 | $5.78 | $4.89 | $5.35 | +3.33% | 2,404,000 |
| Aug 2002 | $4.78 | $5.86 | $4.65 | $5.18 | +8.32% | 3,980,400 |
| Jul 2002 | $7.05 | $7.19 | $3.72 | $4.78 | -32.91% | 6,758,400 |
| Jun 2002 | $6.70 | $7.63 | $6.25 | $7.13 | +7.34% | 3,401,200 |
| May 2002 | $7.50 | $7.59 | $5.97 | $6.64 | -12.58% | 8,331,600 |
| Apr 2002 | $8.56 | $8.56 | $6.47 | $7.59 | -10.68% | 3,345,600 |
| Mar 2002 | $7.72 | $8.62 | $7.52 | $8.50 | +9.68% | 3,804,400 |
| Feb 2002 | $6.54 | $7.93 | $6.49 | $7.75 | +18.32% | 2,027,200 |
| Jan 2002 | $7.28 | $8.20 | $6.48 | $6.55 | -12.11% | 5,472,000 |
| Dec 2001 | $6.56 | $7.72 | $6.28 | $7.45 | +13.78% | 7,557,600 |
| Nov 2001 | $6.83 | $7.11 | $5.73 | $6.55 | -5.11% | 12,299,600 |
| Oct 2001 | $8.49 | $8.92 | $6.33 | $6.90 | -16.84% | 8,867,200 |
| Sep 2001 | $8.56 | $8.84 | $6.49 | $8.30 | -6.24% | 6,757,200 |
| Aug 2001 | $9.25 | $9.34 | $7.88 | $8.85 | -3.33% | 7,381,200 |
| Jul 2001 | $7.99 | $9.90 | $7.71 | $9.16 | +21.41% | 19,166,800 |
| Jun 2001 | $6.70 | $8.67 | $6.69 | $7.54 | +13.85% | 11,900,400 |
| May 2001 | $5.84 | $6.89 | $5.50 | $6.63 | +14.87% | 3,860,400 |
| Apr 2001 | $5.81 | $6.47 | $4.73 | $5.77 | +0.03% | 2,438,000 |
| Mar 2001 | $5.83 | $5.94 | $4.59 | $5.77 | -1.86% | 4,761,200 |
| Feb 2001 | $6.00 | $7.44 | $5.70 | $5.88 | -0.53% | 7,515,200 |
| Jan 2001 | $4.41 | $6.16 | $4.00 | $5.91 | +37.96% | 1,806,000 |
| Dec 2000 | $3.97 | $4.28 | $3.84 | $4.28 | +4.98% | 389,200 |
| Nov 2000 | $4.75 | $5.03 | $3.88 | $4.08 | -18.44% | 1,166,000 |
| Oct 2000 | $4.50 | $5.00 | $4.44 | $5.00 | +11.11% | 1,126,800 |
| Sep 2000 | $4.43 | $4.84 | $3.75 | $4.50 | +1.41% | 1,408,400 |
| Aug 2000 | $4.69 | $4.69 | $4.38 | $4.44 | -2.07% | 610,000 |
| Jul 2000 | $4.16 | $4.69 | $4.14 | $4.53 | +9.02% | 2,612,400 |
| Jun 2000 | $3.84 | $4.34 | $3.84 | $4.16 | +8.13% | 888,400 |
| May 2000 | $3.50 | $3.97 | $3.44 | $3.84 | +9.82% | 2,660,000 |
| Apr 2000 | $3.53 | $3.69 | $3.05 | $3.50 | -5.88% | 1,940,800 |
| Mar 2000 | $4.34 | $4.56 | $3.31 | $3.72 | -16.78% | 1,777,600 |
| Feb 2000 | $4.33 | $5.88 | $4.25 | $4.47 | +4.38% | 2,190,800 |
| Jan 2000 | $4.25 | $4.56 | $3.70 | $4.28 | +0.74% | 1,807,600 |
| Dec 1999 | $3.74 | $4.53 | $3.22 | $4.25 | +22.52% | 998,400 |
| Nov 1999 | $3.38 | $4.53 | $3.38 | $3.47 | +2.78% | 2,217,600 |
| Oct 1999 | $3.94 | $3.97 | $3.09 | $3.38 | -14.29% | 2,965,600 |
| Sep 1999 | $4.56 | $5.00 | $3.69 | $3.94 | -12.80% | 2,458,400 |
| Aug 1999 | $5.44 | $5.69 | $4.50 | $4.52 | -17.90% | 3,210,800 |
| Jul 1999 | $4.88 | $7.25 | $4.03 | $5.50 | +12.10% | 2,813,600 |
| Jun 1999 | $3.25 | $5.59 | $2.97 | $4.91 | +57.00% | 2,286,400 |
| May 1999 | $3.84 | $3.94 | $2.84 | $3.13 | -20.63% | 2,036,000 |
| Apr 1999 | $3.69 | $4.19 | $3.38 | $3.94 | +8.62% | 5,409,600 |
| Mar 1999 | $7.06 | $7.97 | $2.50 | $3.63 | -48.67% | 17,905,600 |
| Feb 1999 | $7.47 | $7.50 | $6.50 | $7.06 | -2.59% | 1,154,800 |
| Jan 1999 | $8.25 | $9.19 | $6.94 | $7.25 | -13.43% | 3,946,800 |
| Dec 1998 | $7.09 | $8.94 | $7.09 | $8.38 | +18.06% | 2,424,000 |
| Nov 1998 | $7.19 | $7.50 | $6.75 | $7.09 | +1.34% | 2,344,400 |
| Oct 1998 | $8.13 | $8.25 | $6.19 | $7.00 | -14.18% | 3,376,000 |
| Sep 1998 | $6.66 | $9.00 | $6.59 | $8.16 | +22.54% | 1,854,000 |
| Aug 1998 | $7.78 | $8.13 | $6.63 | $6.66 | -14.80% | 3,113,600 |
| Jul 1998 | $6.38 | $8.06 | $6.09 | $7.81 | +23.76% | 5,013,200 |
| Jun 1998 | $6.50 | $7.13 | $6.16 | $6.31 | -0.98% | 6,065,200 |
| May 1998 | $5.66 | $6.42 | $5.63 | $6.38 | – | 19,250,800 |
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% |