ICON Stock Price History
NASDAQ: ICLRHealth CareBiotechnology: Commercial Physical & Biological ResarchUSD
164.17-0.33 (-0.20%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
ICLR price history at a glance
The price history for ICON (ICLR) on this page begins on May 11, 1998, when the stock closed at $6.36; it most recently closed at $164.17 on October 5, 2026. The highest price in this record is $347.72, reached on July 15, 2024; the latest close is 52.8% below that peak. Across the 27 complete calendar years in the table, ICLR finished higher in 18 and lower in 9. Its best year was 2006 (+83.3%) and its worst was 1999 (-49.3%).
Over roughly 28 years the share price changed +2481.5%, a 12.1% compound annual price return (excluding dividends). In the last 12 months alone, ICLR has lost 12.5%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 1998
- $347.72
- Date of high
- Jul 15, 2024
- Low since 1998
- $2.50
- Date of low
- Mar 29, 1999
- 52-week high
- $203.91
- 52-week low
- $66.57
- IPO year
- 1998
- Last close
- $164.17
ICLR returns
1 week
+1.31%
1 month
+2.92%
3 months
-2.12%
6 months
+53.70%
Year to date
-9.91%
1 year
-12.54%
3 years
-33.60%
5 years
-40.31%
ICLR price return, excluding dividends.
ICLR annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 164.17 | -12.99% |
| 2025 | 188.67 | -11.54% |
| 2024 | 213.28 | -24.65% |
| 2023 | 283.07 | +45.72% |
| 2022 | 194.25 | -37.28% |
| 2021 | 309.70 | +58.84% |
| 2020 | 194.98 | +16.00% |
| 2019 | 168.09 | +35.95% |
| 2018 | 123.64 | +10.25% |
| 2017 | 112.15 | +49.14% |
| 2016 | 75.20 | -3.22% |
| 2015 | 77.70 | +50.55% |
| 2014 | 51.61 | +30.63% |
| 2013 | 39.51 | +37.09% |
| 2012 | 28.82 | +68.44% |
| 2011 | 17.11 | -21.87% |
| 2010 | 21.90 | +0.78% |
| 2009 | 21.73 | +13.18% |
| 2008 | 19.20 | -39.51% |
| 2007 | 31.74 | +68.38% |
| 2006 | 18.85 | +83.28% |
| 2005 | 10.29 | +7.16% |
| 2004 | 9.60 | -11.32% |
| 2003 | 10.82 | +58.75% |
| 2002 | 6.82 | -6.99% |
| 2001 | 7.33 | +71.21% |
| 2000 | 4.28 | +0.74% |
| 1999 | 4.25 | -49.25% |
| 1998* | 8.38 | +31.69% |
* Partial year: the record begins after the start of 1998; return measured from the first available close.
2026 return is year to date.
ICLR daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 166.90 | 169.85 | 163.49 | 164.17 | -0.20% | |
| 161.62 | 164.95 | 159.16 | 164.50 | +0.26% | |
| 160.93 | 165.22 | 157.38 | 164.08 | +1.48% | |
| 169.69 | 177.67 | 161.14 | 161.69 | -3.94% | |
| 161.07 | 168.76 | 160.99 | 168.33 | +3.88% | |
| 161.85 | 163.43 | 160.41 | 162.05 | +0.12% | |
| 169.99 | 170.22 | 160.90 | 161.85 | -4.79% | |
| 167.98 | 170.40 | 165.24 | 169.99 | -0.21% | |
| 174.50 | 176.70 | 169.73 | 170.35 | -2.97% | |
| 171.13 | 175.87 | 169.38 | 175.57 | +1.88% | |
| 173.80 | 174.92 | 170.44 | 172.33 | -0.90% | |
| 163.79 | 175.00 | 163.79 | 173.90 | +6.10% | |
| 167.77 | 169.28 | 163.41 | 163.90 | -1.92% | |
| 170.55 | 172.04 | 167.11 | 167.11 | -1.44% | |
| 164.61 | 169.95 | 163.16 | 169.55 | +3.31% | |
| 169.50 | 169.50 | 162.59 | 164.11 | -3.28% | |
| 175.01 | 177.50 | 169.44 | 169.68 | -2.45% | |
| 173.51 | 175.59 | 172.09 | 173.94 | +0.86% | |
| 168.02 | 172.94 | 167.72 | 172.45 | +2.08% | |
| 171.51 | 173.40 | 167.80 | 168.93 | -0.22% | |
| 165.68 | 175.63 | 165.68 | 169.31 | +2.18% | |
| 159.27 | 166.53 | 156.70 | 165.69 | +3.87% | |
| 158.71 | 161.76 | 157.26 | 159.51 | +0.74% | |
| 162.30 | 162.42 | 158.04 | 158.34 | -3.95% | |
| 159.94 | 165.92 | 159.50 | 164.85 | +0.78% | |
| 159.87 | 164.35 | 159.55 | 163.58 | +2.34% | |
| 161.88 | 164.24 | 158.66 | 159.84 | -0.97% | |
| 165.24 | 165.36 | 160.01 | 161.40 | -2.18% | |
| 169.91 | 170.41 | 163.57 | 164.99 | -2.96% | |
| 169.41 | 170.42 | 165.70 | 170.02 | +0.18% | |
| 168.84 | 174.12 | 168.27 | 169.72 | +0.47% | |
| 165.88 | 169.83 | 165.45 | 168.93 | +0.01% | |
| 172.69 | 173.00 | 168.01 | 168.91 | -2.63% | |
| 170.81 | 174.44 | 168.38 | 173.48 | +0.73% | |
| 173.02 | 179.02 | 172.03 | 172.23 | -1.17% | |
| 170.17 | 180.89 | 170.17 | 174.27 | +1.03% | |
| 170.10 | 175.71 | 167.49 | 172.49 | +3.26% | |
| 170.00 | 172.95 | 166.87 | 167.05 | -1.42% | |
| 161.34 | 169.73 | 161.17 | 169.45 | +3.86% | |
| 166.65 | 167.29 | 162.42 | 163.15 | -2.59% | |
| 167.69 | 167.87 | 160.05 | 167.48 | +0.19% | |
| 165.27 | 167.74 | 161.77 | 167.17 | +0.96% | |
| 165.56 | 167.34 | 161.89 | 165.58 | -0.28% | |
| 163.80 | 167.70 | 163.80 | 166.05 | +0.94% | |
| 161.86 | 164.89 | 160.46 | 164.51 | +2.07% | |
| 162.37 | 162.65 | 159.07 | 161.17 | -1.43% | |
| 158.65 | 167.51 | 156.00 | 163.51 | +4.25% | |
| 156.71 | 157.42 | 150.86 | 156.85 | -0.98% | |
| 165.31 | 165.80 | 156.56 | 158.41 | -3.15% | |
| 165.45 | 171.74 | 162.41 | 163.57 | -1.18% | |
| 165.75 | 172.97 | 162.50 | 165.53 | -7.10% | |
| 180.25 | 182.54 | 175.63 | 178.18 | -1.14% | |
| 177.58 | 186.64 | 177.17 | 180.24 | +6.79% | |
| 165.55 | 169.98 | 161.29 | 168.78 | +1.82% | |
| 173.86 | 173.89 | 165.58 | 165.76 | -2.68% | |
| 175.00 | 182.97 | 169.62 | 170.32 | +1.82% | |
| 167.19 | 168.00 | 164.14 | 167.28 | +0.40% | |
| 163.70 | 167.64 | 162.18 | 166.62 | +0.26% | |
| 171.48 | 171.48 | 164.55 | 166.18 | -2.25% | |
| 167.00 | 172.40 | 167.00 | 170.00 | 0.00% | |
| 171.58 | 173.23 | 167.22 | 170.00 | -1.21% | |
| 169.63 | 172.26 | 167.32 | 172.08 | +2.45% | |
| 165.10 | 169.38 | 162.83 | 167.97 | +1.13% | |
| 165.75 | 168.14 | 164.32 | 166.10 | -0.97% | |
| 168.77 | 170.00 | 167.71 | 167.72 | -0.62% | |
| 166.45 | 170.40 | 164.42 | 168.77 | +1.99% | |
| 166.88 | 167.96 | 162.06 | 165.47 | -1.93% | |
| 172.03 | 172.52 | 167.55 | 168.72 | -1.30% | |
| 170.29 | 171.23 | 167.83 | 170.94 | -1.23% | |
| 177.07 | 179.29 | 170.93 | 173.06 | -1.14% | |
| 174.00 | 181.82 | 173.22 | 175.05 | +0.77% | |
| 178.29 | 181.00 | 170.85 | 173.71 | +0.42% | |
| 169.65 | 173.51 | 167.24 | 172.99 | +1.84% | |
| 158.59 | 170.51 | 158.59 | 169.86 | +5.53% | |
| 161.92 | 168.63 | 160.47 | 160.96 | +1.76% | |
| 147.79 | 162.00 | 147.71 | 158.17 | +10.86% | |
| 139.72 | 145.01 | 138.84 | 142.67 | +1.38% | |
| 145.77 | 148.00 | 140.14 | 140.73 | -3.61% | |
| 145.32 | 146.51 | 141.70 | 146.00 | +1.91% | |
| 143.65 | 145.09 | 140.00 | 143.27 | -0.19% | |
| 148.88 | 148.88 | 142.93 | 143.54 | -2.83% | |
| 147.20 | 148.74 | 144.84 | 147.72 | +1.05% | |
| 150.11 | 151.53 | 143.86 | 146.18 | -2.49% | |
| 144.89 | 149.97 | 143.30 | 149.92 | +3.69% | |
| 152.15 | 154.27 | 144.31 | 144.59 | -4.76% | |
| 152.93 | 156.20 | 150.32 | 151.82 | -0.28% | |
| 149.45 | 153.94 | 147.17 | 152.24 | +1.87% | |
| 151.78 | 153.75 | 147.97 | 149.45 | -2.19% | |
| 144.28 | 153.84 | 144.28 | 152.80 | +6.18% | |
| 136.79 | 145.92 | 135.52 | 143.90 | +4.62% | |
| 138.28 | 143.04 | 134.39 | 137.54 | -0.35% | |
| 133.70 | 138.46 | 132.36 | 138.03 | +1.44% | |
| 134.75 | 138.46 | 131.49 | 136.07 | -0.53% | |
| 117.82 | 139.69 | 116.48 | 136.80 | +15.49% | |
| 114.50 | 118.67 | 113.94 | 118.45 | +4.04% | |
| 116.78 | 116.78 | 113.10 | 113.85 | -2.51% | |
| 116.57 | 119.55 | 115.16 | 116.78 | +0.18% | |
| 113.90 | 116.80 | 112.43 | 116.57 | +1.29% | |
| 112.00 | 118.05 | 108.89 | 115.09 | +1.36% | |
| 114.38 | 116.63 | 113.38 | 113.55 | -0.20% | |
| 116.38 | 120.00 | 112.86 | 113.78 | -2.23% | |
| 117.09 | 118.70 | 115.29 | 116.38 | -0.61% | |
| 116.39 | 122.77 | 116.39 | 117.09 | -0.25% | |
| 121.76 | 121.76 | 115.64 | 117.38 | -3.74% | |
| 120.65 | 123.31 | 118.03 | 121.94 | +2.51% | |
| 124.14 | 124.80 | 118.79 | 118.96 | -4.44% | |
| 124.97 | 128.95 | 120.34 | 124.49 | -0.41% | |
| 125.27 | 129.73 | 122.91 | 125.00 | +0.70% | |
| 123.14 | 125.66 | 121.00 | 124.13 | +2.32% | |
| 112.00 | 122.45 | 112.00 | 121.32 | +8.35% | |
| 112.42 | 112.53 | 108.80 | 111.97 | -0.78% | |
| 119.66 | 120.49 | 112.12 | 112.85 | -4.63% | |
| 115.15 | 118.80 | 111.00 | 118.33 | +1.86% | |
| 116.25 | 119.43 | 110.38 | 116.17 | +13.35% | |
| 103.09 | 103.85 | 99.06 | 102.49 | -0.70% | |
| 102.42 | 103.34 | 99.37 | 103.21 | +1.02% | |
| 107.71 | 107.71 | 99.93 | 102.17 | -3.92% | |
| 107.50 | 110.10 | 104.03 | 106.34 | -7.87% | |
| 116.91 | 117.72 | 113.48 | 115.43 | +0.22% | |
| 116.47 | 118.68 | 114.10 | 115.18 | -1.66% | |
| 118.25 | 119.45 | 115.78 | 117.12 | -2.14% | |
| 116.98 | 121.03 | 116.41 | 119.68 | +3.55% | |
| 116.54 | 118.54 | 114.26 | 115.58 | -0.79% | |
| 113.31 | 116.65 | 112.53 | 116.50 | +3.04% | |
| 110.54 | 114.29 | 110.25 | 113.06 | +2.44% | |
| 106.22 | 111.09 | 105.05 | 110.37 | +3.33% | |
| 107.76 | 107.76 | 104.07 | 106.81 | +0.10% | |
| 105.12 | 106.83 | 102.53 | 106.70 | +0.15% | |
| 111.90 | 113.12 | 106.15 | 106.54 | -0.58% | |
| 109.62 | 110.74 | 106.42 | 107.16 | -2.24% | |
| 113.50 | 114.06 | 108.15 | 109.62 | -4.00% | |
| 110.06 | 115.63 | 108.58 | 114.19 | +2.49% | |
| 110.83 | 112.94 | 110.33 | 111.42 | +0.69% | |
| 105.10 | 112.01 | 103.19 | 110.66 | +5.29% | |
| 103.07 | 106.90 | 102.30 | 105.10 | +2.96% | |
| 102.70 | 103.97 | 100.95 | 102.08 | -0.97% | |
| 101.63 | 103.22 | 100.25 | 103.08 | +3.09% | |
| 102.40 | 104.27 | 97.11 | 99.99 | -1.27% | |
| 99.88 | 103.92 | 98.60 | 101.28 | +0.93% | |
| 101.05 | 103.42 | 99.88 | 100.35 | +0.65% | |
| 98.18 | 100.70 | 97.21 | 99.70 | +1.68% | |
| 96.01 | 98.77 | 95.75 | 98.05 | +0.94% | |
| 98.30 | 99.73 | 96.50 | 97.14 | -3.33% | |
| 98.99 | 102.34 | 98.01 | 100.49 | +2.95% | |
| 99.94 | 100.68 | 96.00 | 97.61 | -0.73% | |
| 98.40 | 99.40 | 97.06 | 98.33 | +0.90% | |
| 104.35 | 107.12 | 97.36 | 97.45 | -7.53% | |
| 107.12 | 107.98 | 104.30 | 105.38 | -1.16% | |
| 110.25 | 110.25 | 105.75 | 106.62 | -3.10% | |
| 105.77 | 110.41 | 104.01 | 110.03 | +2.64% | |
| 108.23 | 109.97 | 106.28 | 107.20 | -3.07% | |
| 108.43 | 113.88 | 108.43 | 110.60 | +0.36% | |
| 109.29 | 111.37 | 106.98 | 110.20 | +1.38% | |
| 105.89 | 109.58 | 103.74 | 108.70 | +0.40% | |
| 105.81 | 110.28 | 105.51 | 108.27 | +0.12% | |
| 105.95 | 108.72 | 104.12 | 108.14 | +1.89% | |
| 100.65 | 106.86 | 99.98 | 106.13 | +5.08% | |
| 104.92 | 104.92 | 99.49 | 101.00 | -2.97% | |
| 104.84 | 106.89 | 103.85 | 104.09 | -0.54% | |
| 100.68 | 105.50 | 100.03 | 104.66 | +4.97% | |
| 96.83 | 100.83 | 96.83 | 99.70 | +1.31% | |
| 94.85 | 99.52 | 92.59 | 98.41 | +1.98% | |
| 89.26 | 97.30 | 87.91 | 96.50 | +8.89% | |
| 90.48 | 94.33 | 88.38 | 88.62 | -4.71% | |
| 81.50 | 96.55 | 81.31 | 93.00 | +16.13% | |
| 79.97 | 87.00 | 66.57 | 80.08 | -39.85% | |
| 143.34 | 145.28 | 130.01 | 133.14 | -7.89% | |
| 154.40 | 154.99 | 144.01 | 144.55 | -6.48% | |
| 150.80 | 155.00 | 148.91 | 154.57 | +2.64% | |
| 145.23 | 153.15 | 144.51 | 150.59 | +3.58% | |
| 162.62 | 164.72 | 144.27 | 145.39 | -10.86% | |
| 167.67 | 168.99 | 162.87 | 163.11 | -2.86% | |
| 178.43 | 178.69 | 164.93 | 167.91 | -5.98% | |
| 180.25 | 180.51 | 175.07 | 178.59 | -0.92% | |
| 183.26 | 186.00 | 176.34 | 180.25 | -3.03% | |
| 185.03 | 186.27 | 180.03 | 185.89 | -0.23% | |
| 186.96 | 190.17 | 180.84 | 186.32 | -0.88% | |
| 186.93 | 191.00 | 186.93 | 187.97 | +0.29% | |
| 185.68 | 189.99 | 183.90 | 187.42 | +0.39% | |
| 186.83 | 189.72 | 184.75 | 186.70 | -0.02% | |
| 187.95 | 190.21 | 185.38 | 186.74 | +1.01% | |
| 176.55 | 185.44 | 175.18 | 184.87 | +4.70% | |
| 178.43 | 179.47 | 173.42 | 176.57 | -3.31% | |
| 181.91 | 188.00 | 181.44 | 182.61 | +0.03% | |
| 184.01 | 184.62 | 180.00 | 182.56 | -1.20% | |
| 184.17 | 185.99 | 183.22 | 184.77 | +0.81% | |
| 182.14 | 185.23 | 180.20 | 183.29 | +1.74% | |
| 182.98 | 183.02 | 177.47 | 180.15 | -0.68% | |
| 189.99 | 191.00 | 180.27 | 181.38 | -3.63% | |
| 179.07 | 190.53 | 171.99 | 188.22 | -7.24% | |
| 203.07 | 203.91 | 200.06 | 202.92 | +0.71% | |
| 198.22 | 202.78 | 197.39 | 201.48 | +1.97% | |
| 186.54 | 198.24 | 186.00 | 197.58 | +4.72% | |
| 183.95 | 189.53 | 182.48 | 188.67 | +3.54% | |
| 182.68 | 184.00 | 181.06 | 182.22 | -0.43% | |
| 181.74 | 183.16 | 180.48 | 183.00 | +0.35% | |
| 183.20 | 184.93 | 180.75 | 182.36 | -0.26% | |
| 183.85 | 183.91 | 180.89 | 182.84 | -0.46% | |
| 182.19 | 184.01 | 180.64 | 183.68 | +0.33% | |
| 177.98 | 183.33 | 177.31 | 183.07 | +2.19% | |
| 173.46 | 180.38 | 172.55 | 179.14 | +3.09% | |
| 177.94 | 178.75 | 172.79 | 173.77 | -2.76% | |
| 182.10 | 185.31 | 177.34 | 178.70 | -0.36% | |
| 182.48 | 184.29 | 179.06 | 179.34 | -1.70% | |
| 183.71 | 185.56 | 181.19 | 182.45 | -1.04% | |
| 184.94 | 189.23 | 181.89 | 184.37 | -1.18% | |
| 188.44 | 191.85 | 185.81 | 186.58 | -1.76% | |
| 187.22 | 190.26 | 185.69 | 189.93 | +2.19% | |
| 181.52 | 186.73 | 180.80 | 185.86 | +2.52% | |
| 182.69 | 184.20 | 178.80 | 181.29 | -0.44% | |
| 185.68 | 186.05 | 180.57 | 182.10 | -2.03% | |
| 186.61 | 188.99 | 180.95 | 185.87 | +0.05% | |
| 185.06 | 186.77 | 174.13 | 185.77 | -1.07% | |
| 181.61 | 191.15 | 181.61 | 187.78 | +2.53% | |
| 179.88 | 185.77 | 178.03 | 183.14 | +1.91% | |
| 183.80 | 187.57 | 177.12 | 179.71 | -2.86% | |
| 182.64 | 186.57 | 181.77 | 185.00 | +0.74% | |
| 175.64 | 184.09 | 173.88 | 183.65 | +5.23% | |
| 165.73 | 176.07 | 164.59 | 174.53 | +6.07% | |
| 163.11 | 165.75 | 161.75 | 164.55 | -0.01% | |
| 157.76 | 165.49 | 155.66 | 164.56 | +4.07% | |
| 158.74 | 162.97 | 154.20 | 158.12 | -0.43% | |
| 161.74 | 164.41 | 157.36 | 158.81 | -1.37% | |
| 155.58 | 162.00 | 154.12 | 161.02 | +2.89% | |
| 160.91 | 162.38 | 156.34 | 156.49 | -3.51% | |
| 163.01 | 165.47 | 158.08 | 162.18 | -0.78% | |
| 161.25 | 166.32 | 161.25 | 163.45 | +0.02% | |
| 164.57 | 167.43 | 163.27 | 163.42 | 0.00% | |
| 159.51 | 164.82 | 157.23 | 163.42 | +3.64% | |
| 158.03 | 159.76 | 156.05 | 157.68 | -0.92% | |
| 159.76 | 159.76 | 155.00 | 159.14 | -0.54% | |
| 163.72 | 168.28 | 159.77 | 160.00 | -2.26% | |
| 161.75 | 165.04 | 158.55 | 163.70 | +0.45% | |
| 166.89 | 168.67 | 162.83 | 162.96 | -3.45% | |
| 169.19 | 170.95 | 166.20 | 168.79 | -1.76% | |
| 163.42 | 172.99 | 163.42 | 171.82 | +3.93% | |
| 164.72 | 166.35 | 162.36 | 165.33 | -0.37% | |
| 175.55 | 177.51 | 165.10 | 165.95 | -6.63% | |
| 180.61 | 180.72 | 174.54 | 177.73 | -2.36% | |
| 178.11 | 184.57 | 175.13 | 182.03 | +2.20% | |
| 179.22 | 179.83 | 173.94 | 178.11 | -1.05% | |
| 189.00 | 193.00 | 173.38 | 180.00 | -6.54% | |
| 194.74 | 197.92 | 189.00 | 192.60 | -0.34% | |
| 187.68 | 198.30 | 184.24 | 193.26 | +2.55% | |
| 187.45 | 190.36 | 185.50 | 188.45 | +1.83% | |
| 188.00 | 189.58 | 182.33 | 185.06 | -1.80% | |
| 187.64 | 193.21 | 186.48 | 188.46 | +0.32% | |
| 185.64 | 188.55 | 184.09 | 187.85 | +1.04% | |
| 184.72 | 187.36 | 180.47 | 185.91 | -0.08% | |
| 183.56 | 188.18 | 182.29 | 186.05 | +1.40% | |
| 188.12 | 188.79 | 181.10 | 183.49 | -2.25% | |
| 186.13 | 189.41 | 185.58 | 187.71 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the ICLR chart for longer ranges.