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Closing prices for 09 October 2026
Next earnings report: 30 October 2026 · Earnings calendar
The series is stated in the current share scale after splits; dividends are not included in the price
Aon plc Class A Ordinary Shares (Ireland) trades on NYSE under the ticker AON. The company belongs to the Financials sector. The trading history on this page starts on 22 August 2016.
Over the past 52 weeks AON has traded between 266.33 $ and 382.34 $. As of 09 October 2026 the price stood 6.15 % of the way from the 52-week low to the high.
Over one year AON shares fell 25.15 %; over six months they fell 12.51 %. Volatility over 90 days is 32.06 %. Dividends are not included: this is price change only, as of 09 October 2026.
AON trades at a price-to-earnings ratio of 15.2, above the sector median of 13.4. Price to sales is 3.4, above the sector median of 2.7. Price to book is 6.0, above the sector median of 1.3. Calculated from reports for the period ending 31 March 2026.
| Date | Open | High | Low | Close | Volume, shares |
|---|---|---|---|---|---|
| 09 October 2026 | 276.63 | 277.03 | 272.83 | 273.47 | 2M |
| 08 October 2026 | 271.29 | 277.90 | 270.03 | 277.12 | 2M |
| 07 October 2026 | 275.07 | 275.31 | 269.72 | 270.47 | 2M |
| 06 October 2026 | 270.83 | 274.71 |
Based on the last 12 months of reports, through 31 March 2026
The sector median covers every company in the sector on the US market, loss-making ones included.
Aon is an insurance broker and risk adviser: it places other people's risk for a commission without taking it on.
A broker selects cover for a corporate client, negotiates terms with insurers and handles claims. Commission is proportional to the premium, so rising insurance prices raise the broker's income without raising its own risk.
Beyond insurance the company advises on pension programmes, workforce matters and reinsurance. Serving large corporations requires expertise that cannot be reproduced quickly, and changing broker is a rare decision, so the client base is stable.
Risks: a softening insurance market where premiums and commissions fall, competition for talent, and integrating large acquisitions. The company pays a dividend and buys back stock actively.
Address:15 GEORGES QUAY, DUBLIN 2, D02 VR98, IE
Aon plc Class A Ordinary Shares (Ireland) reported revenue of 17.5B $ and net income of 3.9B $ over the last four quarters. Net margin is 22.45 %. Revenue changed by +6.90 % year over year. Earnings per share are 18.22 $. Market capitalisation is 59.5B $.
AON has a return on equity of 39.91 %, above the sector median of 9.80 %. Return on assets is 7.63 %, above the sector median of 1.13 %. Operating margin is 26.30 %, above the sector median of 1.07 %.
| 157M |
| BROBrown & Brown, Inc. | 62.88 | −1.36 % | 146M |
| BWINThe Baldwin Insurance Group, Inc. | 31.87 | +0.05 % | 129M |
| RYANRyan Specialty Holdings, Inc. | 37.11 | −1.80 % | 81M |
| ERIEErie Indemnity Company | 224.60 | −0.86 % | 63M |
| 270.10 |
| 273.99 |
| 1M |
| 05 October 2026 | 267.59 | 272.37 | 266.33 | 272.05 | 1M |
| 02 October 2026 | 274.96 | 276.39 | 268.90 | 269.45 | 2M |
| 01 October 2026 | 277.48 | 279.49 | 274.81 | 275.95 | 2M |
| 30 September 2026 | 275.78 | 278.19 | 273.80 | 276.77 | 2M |
| 29 September 2026 | 269.91 | 276.97 | 269.02 | 275.90 | 2M |
| 28 September 2026 | 277.50 | 278.40 | 270.00 | 272.10 | 2M |
| 25 September 2026 | 277.00 | 280.98 | 276.52 | 277.99 | 2M |
| 24 September 2026 | 281.60 | 283.03 | 275.38 | 276.09 | 3M |
| 23 September 2026 | 284.67 | 286.80 | 281.18 | 281.60 | 2M |
| 22 September 2026 | 291.06 | 293.55 | 282.70 | 286.10 | 3M |
| 21 September 2026 | 297.01 | 297.87 | 290.70 | 290.82 | 2M |
| 18 September 2026 | 294.25 | 297.73 | 293.00 | 295.64 | 3M |
| 17 September 2026 | 299.54 | 302.12 | 295.78 | 296.05 | 3M |
| 16 September 2026 | 303.40 | 304.06 | 298.48 | 300.57 | 3M |
| 15 September 2026 | 311.60 | 311.98 | 304.59 | 304.67 | 2M |
| 14 September 2026 | 308.08 | 312.39 | 305.92 | 311.54 | 3M |