Aon Stock Price History
NYSE: AONFinanceSpecialty InsurersUSD
273.47-3.65 (-1.32%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
AON price history at a glance
The price history for Aon (AON) on this page begins on June 2, 1980, when the stock closed at $2.70; it most recently closed at $273.47 on October 5, 2026. The highest price in this record is $412.97, reached on March 3, 2025; the latest close is 33.8% below that peak. Across the 45 complete calendar years in the table, AON finished higher in 29 and lower in 16. Its best year was 1995 (+55.9%) and its worst was 2002 (-43.4%).
Over roughly 46 years the share price changed +10014.7%, a 10.5% compound annual price return (excluding dividends). In the last 12 months alone, AON has lost 24.1%. 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 1980
- $412.97
- Date of high
- Mar 3, 2025
- Low since 1980
- $2.44
- Date of low
- Dec 8, 1980
- 52-week high
- $382.34
- 52-week low
- $266.33
- Last close
- $273.47
AON returns
1 week
+1.49%
1 month
-10.25%
3 months
-23.38%
6 months
-12.51%
Year to date
-22.50%
1 year
-24.12%
3 years
-16.14%
5 years
-11.58%
AON price return, excluding dividends.
AON annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 273.47 | -20.57% |
| 2025 | 344.27 | -2.74% |
| 2024 | 353.98 | +21.63% |
| 2023 | 291.02 | -3.04% |
| 2022 | 300.14 | -0.14% |
| 2021 | 300.56 | +42.26% |
| 2020 | 211.27 | +1.59% |
| 2019 | 207.97 | +43.87% |
| 2018 | 144.55 | +7.87% |
| 2017 | 134.00 | +20.15% |
| 2016 | 111.53 | +20.95% |
| 2015 | 92.21 | -2.25% |
| 2014 | 94.33 | +14.20% |
| 2013 | 82.60 | +44.58% |
| 2012 | 57.13 | +22.07% |
| 2011 | 46.80 | +1.72% |
| 2010 | 46.01 | +20.01% |
| 2009 | 38.34 | -15.03% |
| 2008 | 45.12 | -0.77% |
| 2007 | 45.47 | +28.66% |
| 2006 | 35.34 | -1.70% |
| 2005 | 35.95 | +50.67% |
| 2004 | 23.86 | -0.83% |
| 2003 | 24.06 | +19.58% |
| 2002 | 20.12 | -43.42% |
| 2001 | 35.56 | +3.82% |
| 2000 | 34.25 | -14.37% |
| 1999 | 40.00 | +8.35% |
| 1998 | 36.92 | -4.73% |
| 1997 | 38.75 | +40.34% |
| 1996 | 27.61 | +24.56% |
| 1995 | 22.17 | +55.86% |
| 1994 | 14.22 | -0.78% |
| 1993 | 14.33 | -10.42% |
| 1992 | 16.00 | +37.14% |
| 1991 | 11.67 | +13.72% |
| 1990 | 10.26 | -18.05% |
| 1989 | 12.52 | +50.89% |
| 1988 | 8.30 | +22.40% |
| 1987 | 6.78 | -17.47% |
| 1986 | 8.21 | +7.13% |
| 1985 | 7.67 | +34.42% |
| 1984 | 5.70 | -4.35% |
| 1983 | 5.96 | +45.70% |
| 1982 | 4.09 | +15.10% |
| 1981 | 3.56 | +36.17% |
| 1980* | 2.61 | -3.42% |
* Partial year: the record begins after the start of 1980; return measured from the first available close.
2026 return is year to date.
AON daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 276.63 | 277.03 | 272.83 | 273.47 | -1.32% | |
| 271.29 | 277.90 | 270.03 | 277.12 | +2.46% | |
| 275.07 | 275.31 | 269.75 | 270.47 | -1.28% | |
| 270.83 | 274.71 | 270.10 | 273.99 | +0.71% | |
| 267.59 | 272.37 | 266.33 | 272.05 | +0.96% | |
| 274.96 | 276.39 | 268.90 | 269.45 | -2.36% | |
| 277.48 | 279.49 | 274.81 | 275.95 | -0.30% | |
| 275.78 | 278.19 | 273.80 | 276.77 | +0.32% | |
| 269.91 | 276.97 | 269.02 | 275.90 | +1.40% | |
| 277.50 | 278.40 | 270.00 | 272.10 | -2.12% | |
| 277.00 | 280.98 | 276.52 | 277.99 | +0.69% | |
| 281.60 | 283.03 | 275.38 | 276.09 | -1.96% | |
| 284.67 | 286.80 | 281.18 | 281.60 | -1.57% | |
| 291.06 | 293.55 | 282.70 | 286.10 | -1.62% | |
| 297.01 | 297.87 | 290.70 | 290.82 | -1.63% | |
| 294.25 | 297.73 | 293.00 | 295.64 | -0.14% | |
| 299.54 | 302.12 | 295.78 | 296.05 | -1.50% | |
| 303.40 | 304.06 | 298.48 | 300.57 | -1.35% | |
| 311.60 | 311.98 | 304.59 | 304.67 | -2.21% | |
| 308.08 | 312.39 | 305.92 | 311.54 | +2.92% | |
| 310.85 | 311.89 | 302.44 | 302.69 | -1.65% | |
| 304.97 | 310.04 | 304.20 | 307.77 | +1.01% | |
| 313.45 | 315.67 | 303.59 | 304.69 | -3.51% | |
| 316.78 | 321.57 | 314.95 | 315.79 | -2.26% | |
| 328.18 | 328.84 | 321.49 | 323.09 | -1.20% | |
| 332.00 | 336.45 | 325.68 | 327.00 | -1.17% | |
| 327.70 | 331.60 | 324.79 | 330.88 | +1.40% | |
| 321.42 | 328.52 | 312.92 | 326.30 | +1.49% | |
| 340.00 | 343.26 | 320.21 | 321.52 | -9.53% | |
| 350.96 | 358.71 | 349.76 | 355.40 | +1.67% | |
| 350.51 | 352.88 | 348.03 | 349.56 | -1.25% | |
| 354.63 | 356.46 | 353.19 | 353.98 | -0.24% | |
| 357.00 | 360.30 | 354.14 | 354.83 | -1.19% | |
| 358.52 | 361.73 | 356.50 | 359.10 | +1.12% | |
| 352.39 | 356.86 | 350.57 | 355.11 | +0.90% | |
| 348.90 | 356.12 | 346.32 | 351.93 | +1.00% | |
| 344.23 | 352.84 | 341.75 | 348.43 | +1.52% | |
| 343.20 | 350.13 | 343.03 | 343.20 | -1.16% | |
| 354.00 | 355.27 | 346.50 | 347.22 | -2.42% | |
| 357.08 | 359.98 | 353.78 | 355.83 | -0.35% | |
| 354.33 | 358.55 | 349.33 | 357.08 | +1.34% | |
| 354.00 | 355.91 | 349.99 | 352.36 | -1.15% | |
| 354.00 | 359.10 | 354.00 | 356.46 | -0.14% | |
| 357.71 | 359.53 | 355.00 | 356.97 | -0.37% | |
| 357.51 | 360.60 | 354.61 | 358.30 | -0.68% | |
| 362.95 | 364.99 | 356.84 | 360.75 | +0.22% | |
| 356.96 | 360.60 | 355.22 | 359.97 | +0.93% | |
| 353.37 | 357.09 | 350.23 | 356.65 | -0.27% | |
| 362.04 | 366.32 | 356.12 | 357.63 | -0.81% | |
| 363.08 | 365.02 | 359.78 | 360.55 | -1.64% | |
| 367.19 | 370.49 | 358.49 | 366.57 | -2.81% | |
| 367.64 | 379.50 | 362.26 | 377.16 | -1.08% | |
| 370.00 | 382.34 | 367.17 | 381.26 | +3.84% | |
| 362.03 | 369.75 | 359.80 | 367.17 | +1.51% | |
| 355.93 | 362.61 | 355.65 | 361.70 | +1.66% | |
| 352.59 | 355.79 | 350.83 | 355.78 | +0.98% | |
| 359.65 | 359.97 | 350.96 | 352.33 | -1.97% | |
| 359.08 | 363.00 | 354.80 | 359.40 | -0.93% | |
| 364.87 | 366.00 | 361.11 | 362.78 | -1.21% | |
| 370.00 | 375.92 | 365.63 | 367.21 | -0.39% | |
| 358.23 | 368.64 | 356.56 | 368.63 | +3.80% | |
| 357.52 | 360.29 | 350.46 | 355.15 | -1.04% | |
| 364.29 | 365.78 | 358.40 | 358.89 | -2.30% | |
| 360.12 | 367.58 | 360.12 | 367.35 | +2.92% | |
| 357.55 | 360.00 | 353.79 | 356.94 | +0.39% | |
| 354.98 | 357.50 | 353.10 | 355.56 | -0.55% | |
| 360.00 | 361.13 | 357.00 | 357.51 | -0.64% | |
| 360.00 | 366.45 | 357.07 | 359.82 | +0.82% | |
| 356.71 | 357.18 | 351.38 | 356.91 | -0.15% | |
| 346.41 | 357.54 | 344.20 | 357.46 | +4.05% | |
| 327.83 | 347.27 | 327.83 | 343.56 | +3.58% | |
| 327.07 | 333.76 | 322.26 | 331.69 | +1.26% | |
| 324.97 | 330.43 | 323.41 | 327.57 | -0.34% | |
| 319.72 | 330.36 | 316.82 | 328.69 | +4.03% | |
| 324.49 | 328.46 | 315.78 | 315.95 | -2.93% | |
| 322.59 | 328.24 | 319.22 | 325.48 | +1.48% | |
| 318.29 | 323.57 | 316.69 | 320.74 | +2.27% | |
| 316.51 | 319.75 | 313.62 | 313.63 | -1.29% | |
| 327.86 | 328.00 | 317.48 | 317.74 | -2.74% | |
| 327.02 | 334.79 | 325.00 | 326.69 | -1.44% | |
| 330.80 | 333.15 | 329.13 | 331.45 | +0.59% | |
| 336.71 | 338.21 | 327.98 | 329.51 | -1.73% | |
| 335.00 | 338.20 | 330.81 | 335.31 | +0.04% | |
| 334.39 | 340.10 | 334.39 | 335.17 | -0.34% | |
| 334.48 | 340.76 | 331.00 | 336.33 | +1.43% | |
| 324.87 | 333.07 | 321.55 | 331.59 | +1.76% | |
| 325.49 | 328.83 | 323.78 | 325.85 | -0.82% | |
| 325.00 | 331.13 | 324.12 | 328.53 | +1.95% | |
| 321.17 | 327.90 | 318.81 | 322.24 | +2.10% | |
| 316.16 | 317.04 | 311.07 | 315.60 | -0.71% | |
| 317.58 | 319.35 | 312.34 | 317.86 | -0.80% | |
| 313.78 | 321.42 | 313.23 | 320.41 | +1.38% | |
| 317.77 | 317.83 | 314.54 | 316.06 | -0.70% | |
| 320.03 | 322.09 | 316.03 | 318.30 | -0.08% | |
| 321.09 | 325.60 | 317.49 | 318.54 | -0.23% | |
| 326.27 | 326.38 | 318.48 | 319.29 | -1.69% | |
| 323.28 | 325.40 | 320.65 | 324.78 | +0.17% | |
| 318.71 | 325.27 | 315.00 | 324.22 | +0.96% | |
| 323.60 | 323.60 | 316.90 | 321.15 | -0.78% | |
| 328.16 | 330.22 | 322.26 | 323.66 | -0.89% | |
| 317.51 | 328.48 | 317.51 | 326.57 | +2.95% | |
| 316.24 | 321.69 | 316.24 | 317.22 | +0.57% | |
| 311.61 | 317.26 | 311.61 | 315.41 | +1.45% | |
| 313.62 | 315.49 | 308.51 | 310.90 | -1.72% | |
| 313.89 | 317.59 | 310.63 | 316.35 | +1.37% | |
| 312.42 | 314.85 | 309.87 | 312.07 | -0.23% | |
| 313.00 | 314.06 | 309.22 | 312.79 | -0.26% | |
| 307.19 | 315.90 | 306.52 | 313.59 | +1.73% | |
| 316.41 | 317.49 | 306.87 | 308.27 | -2.00% | |
| 313.67 | 315.41 | 308.99 | 314.55 | -0.12% | |
| 309.93 | 316.56 | 308.57 | 314.92 | +1.09% | |
| 326.52 | 326.52 | 310.73 | 311.51 | -0.04% | |
| 312.43 | 314.02 | 307.02 | 311.65 | -3.36% | |
| 319.89 | 323.12 | 319.11 | 322.49 | +0.25% | |
| 326.73 | 328.95 | 320.52 | 321.68 | -0.65% | |
| 319.53 | 325.95 | 319.00 | 323.78 | +0.82% | |
| 322.42 | 323.79 | 318.64 | 321.14 | -0.75% | |
| 326.35 | 328.13 | 321.60 | 323.56 | -1.01% | |
| 333.80 | 334.92 | 324.28 | 326.86 | -2.52% | |
| 332.93 | 336.89 | 331.75 | 335.32 | +1.02% | |
| 331.45 | 334.35 | 330.91 | 331.95 | +0.05% | |
| 333.27 | 336.35 | 331.43 | 331.80 | -1.06% | |
| 329.87 | 337.98 | 328.27 | 335.34 | +2.21% | |
| 323.80 | 329.29 | 321.75 | 328.08 | +1.57% | |
| 321.75 | 324.43 | 320.95 | 323.02 | -0.73% | |
| 315.00 | 325.68 | 313.00 | 325.40 | +4.10% | |
| 323.16 | 323.29 | 307.81 | 312.57 | -3.94% | |
| 326.54 | 328.17 | 322.69 | 325.40 | -1.32% | |
| 322.47 | 330.93 | 321.58 | 329.76 | +2.26% | |
| 325.61 | 326.55 | 320.10 | 322.47 | -1.13% | |
| 321.21 | 327.27 | 321.21 | 326.17 | +0.94% | |
| 321.94 | 328.79 | 319.57 | 323.14 | +0.56% | |
| 321.88 | 325.39 | 318.00 | 321.34 | -0.45% | |
| 326.05 | 326.69 | 319.90 | 322.78 | -0.39% | |
| 316.45 | 325.38 | 315.66 | 324.06 | +3.32% | |
| 322.19 | 328.00 | 312.05 | 313.66 | -3.12% | |
| 320.83 | 326.60 | 320.83 | 323.77 | +0.72% | |
| 325.36 | 327.46 | 317.46 | 321.45 | -1.71% | |
| 327.56 | 328.84 | 324.96 | 327.03 | +0.33% | |
| 327.99 | 328.29 | 323.51 | 325.97 | +0.10% | |
| 317.24 | 326.56 | 317.24 | 325.63 | +2.73% | |
| 320.00 | 320.80 | 315.64 | 316.99 | -0.28% | |
| 319.67 | 320.30 | 314.80 | 317.88 | -1.03% | |
| 326.75 | 333.26 | 319.23 | 321.18 | -1.70% | |
| 322.60 | 327.26 | 320.13 | 326.75 | +1.66% | |
| 320.01 | 324.20 | 318.02 | 321.41 | +1.74% | |
| 316.00 | 323.26 | 313.81 | 315.91 | -0.31% | |
| 320.96 | 322.04 | 316.55 | 316.90 | -1.26% | |
| 332.22 | 332.22 | 320.44 | 320.96 | -3.57% | |
| 341.55 | 342.38 | 329.75 | 332.84 | -2.28% | |
| 337.37 | 341.46 | 334.09 | 340.60 | +0.54% | |
| 338.97 | 341.86 | 336.49 | 338.77 | -0.71% | |
| 337.42 | 344.65 | 337.37 | 341.18 | +0.62% | |
| 333.37 | 339.36 | 331.71 | 339.07 | +0.38% | |
| 332.02 | 340.32 | 331.96 | 337.80 | +0.69% | |
| 331.00 | 337.97 | 330.56 | 335.47 | +1.57% | |
| 325.50 | 332.00 | 325.16 | 330.27 | +1.73% | |
| 319.90 | 325.04 | 317.78 | 324.66 | +1.67% | |
| 316.96 | 321.30 | 312.58 | 319.33 | +1.27% | |
| 324.71 | 326.44 | 314.89 | 315.31 | -3.00% | |
| 325.94 | 327.20 | 323.18 | 325.07 | +0.24% | |
| 322.77 | 324.31 | 320.91 | 324.30 | +0.41% | |
| 322.93 | 326.41 | 321.03 | 322.98 | -0.91% | |
| 324.85 | 329.57 | 320.00 | 325.96 | +1.32% | |
| 317.95 | 322.39 | 313.16 | 321.70 | +2.29% | |
| 309.71 | 317.58 | 304.59 | 314.49 | +1.46% | |
| 315.32 | 317.91 | 307.01 | 309.97 | -2.50% | |
| 312.99 | 322.08 | 312.99 | 317.92 | +2.44% | |
| 340.76 | 343.92 | 309.13 | 310.34 | -9.27% | |
| 344.71 | 345.00 | 340.58 | 342.04 | -0.38% | |
| 350.32 | 353.68 | 343.19 | 343.36 | -1.96% | |
| 348.28 | 355.96 | 348.18 | 350.21 | +0.97% | |
| 347.31 | 351.15 | 343.20 | 346.84 | -0.79% | |
| 353.14 | 358.04 | 348.25 | 349.61 | -0.01% | |
| 346.96 | 351.80 | 341.17 | 349.64 | +1.95% | |
| 335.62 | 343.28 | 335.57 | 342.95 | +2.99% | |
| 329.41 | 335.23 | 327.53 | 333.00 | +0.68% | |
| 337.18 | 337.78 | 325.90 | 330.75 | -2.40% | |
| 339.32 | 342.00 | 336.92 | 338.87 | +0.05% | |
| 336.14 | 338.84 | 333.85 | 338.69 | +0.81% | |
| 331.99 | 336.58 | 330.30 | 335.96 | +0.96% | |
| 339.50 | 341.83 | 330.77 | 332.76 | -1.99% | |
| 341.38 | 342.97 | 337.44 | 339.50 | -1.27% | |
| 343.28 | 344.39 | 340.60 | 343.86 | -0.28% | |
| 346.00 | 347.06 | 342.70 | 344.84 | -0.34% | |
| 344.70 | 347.83 | 344.50 | 346.00 | +0.41% | |
| 348.88 | 350.70 | 343.23 | 344.59 | -1.68% | |
| 351.00 | 353.93 | 349.37 | 350.49 | -0.09% | |
| 351.41 | 353.36 | 350.12 | 350.80 | -0.33% | |
| 349.03 | 355.43 | 347.22 | 351.97 | +0.59% | |
| 348.13 | 353.16 | 342.92 | 349.92 | +0.07% | |
| 350.35 | 353.53 | 348.32 | 349.67 | -0.46% | |
| 340.91 | 352.16 | 339.39 | 351.29 | +2.04% | |
| 351.12 | 351.65 | 342.75 | 344.27 | -2.44% | |
| 356.96 | 356.96 | 352.82 | 352.88 | -1.01% | |
| 355.94 | 357.57 | 353.66 | 356.49 | -0.07% | |
| 356.66 | 358.55 | 355.40 | 356.73 | +0.02% | |
| 356.24 | 357.79 | 354.14 | 356.65 | 0.00% | |
| 355.00 | 358.14 | 354.02 | 356.65 | +0.22% | |
| 355.77 | 356.81 | 353.88 | 355.87 | +0.12% | |
| 348.87 | 356.77 | 348.00 | 355.46 | +1.55% | |
| 352.66 | 354.46 | 349.91 | 350.04 | -0.84% | |
| 350.70 | 354.06 | 350.70 | 353.02 | +0.28% | |
| 350.36 | 354.40 | 349.93 | 352.03 | +0.07% | |
| 352.84 | 354.72 | 351.04 | 351.80 | -0.65% | |
| 353.71 | 355.33 | 350.98 | 354.10 | +0.09% | |
| 348.64 | 354.12 | 347.39 | 353.79 | +1.84% | |
| 342.73 | 348.12 | 340.05 | 347.40 | +2.16% | |
| 346.26 | 346.42 | 336.43 | 340.05 | -1.77% | |
| 344.32 | 348.66 | 343.08 | 346.19 | +0.82% | |
| 343.23 | 344.55 | 341.03 | 343.39 | -0.52% | |
| 346.72 | 347.57 | 340.19 | 345.20 | -0.72% | |
| 344.45 | 347.99 | 344.45 | 347.71 | +0.95% | |
| 345.49 | 347.34 | 341.98 | 344.45 | -0.36% | |
| 351.04 | 351.66 | 345.54 | 345.70 | -1.56% | |
| 352.69 | 355.48 | 350.42 | 351.17 | -0.78% | |
| 352.12 | 355.62 | 351.49 | 353.92 | +0.37% | |
| 351.49 | 353.45 | 349.77 | 352.61 | +0.47% | |
| 344.06 | 351.50 | 342.80 | 350.96 | +1.82% | |
| 347.23 | 347.32 | 343.32 | 344.70 | -0.52% | |
| 346.00 | 349.70 | 344.15 | 346.51 | +0.18% | |
| 343.75 | 346.06 | 343.18 | 345.89 | +0.50% | |
| 348.36 | 349.98 | 339.17 | 344.17 | -1.25% | |
| 352.23 | 352.64 | 344.41 | 348.54 | -0.42% | |
| 350.00 | 353.00 | 347.27 | 350.02 | -0.03% | |
| 351.85 | 354.24 | 344.87 | 350.13 | -0.23% | |
| 349.94 | 352.99 | 347.28 | 350.94 | +0.24% | |
| 349.17 | 351.59 | 345.41 | 350.11 | +0.05% | |
| 346.74 | 350.43 | 344.64 | 349.93 | +1.47% | |
| 343.34 | 346.83 | 341.02 | 344.87 | -0.42% | |
| 340.94 | 348.18 | 339.01 | 346.32 | +1.86% | |
| 340.83 | 343.61 | 339.00 | 340.00 | -0.50% | |
| 344.21 | 346.76 | 341.70 | 341.70 | -0.73% | |
| 340.11 | 344.37 | 337.82 | 344.21 | +1.29% | |
| 339.42 | 340.37 | 331.14 | 339.84 | -0.25% | |
| 336.43 | 348.61 | 334.80 | 340.68 | +3.81% | |
| 328.07 | 330.71 | 326.51 | 328.19 | +0.65% | |
| 327.93 | 329.19 | 324.28 | 326.07 | -1.18% | |
| 335.21 | 335.21 | 329.00 | 329.96 | -2.05% | |
| 337.00 | 338.61 | 335.24 | 336.87 | -0.25% | |
| 340.50 | 342.33 | 337.34 | 337.73 | -1.06% | |
| 343.00 | 343.40 | 338.25 | 341.35 | -0.51% | |
| 343.32 | 344.29 | 340.51 | 343.10 | -0.10% | |
| 343.80 | 346.37 | 342.18 | 343.43 | -0.20% | |
| 347.22 | 347.22 | 341.40 | 344.11 | -0.72% | |
| 344.07 | 348.31 | 344.06 | 346.60 | +1.01% | |
| 348.92 | 349.04 | 337.92 | 343.12 | -3.56% | |
| 357.49 | 359.97 | 353.93 | 355.80 | -1.31% | |
| 353.78 | 360.82 | 352.40 | 360.51 | +2.02% | |
| 357.11 | 359.56 | 351.87 | 353.36 | -1.89% | |
| 362.26 | 363.29 | 359.18 | 360.15 | -0.07% | |
| 365.60 | 367.25 | 359.92 | 360.42 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the AON chart for longer ranges.