Aon plc
AON- Exchange
- NYSE
- Industry
- Insurance Agents, Brokers & Service
- SEC CIK
- 0000315293
In the last 90 days, Aon plc insiders filed 1 open-market purchase and 3 sales; 1,273 institutions reported holding it in 13F filings for Q2 2026, worth $63.9B in total; 4 superinvestors hold it, including Viking Global Investors and Baupost Group.
13F holders, Q4 2025
Institutional positions in Aon plc as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 1,288
- +57 vs. Q3 2025
- Shares held
- 189.1M
- +3.31M (+1.8%) vs. Q3 2025
- Total value
- $66.7B
- +$447.9M (+0.7%) vs. Q3 2025
- New holders
- 156
- 425 more added
- Sold out
- 99
- 477 more reduced
23 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting AON on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1,273 | $63.9B |
| Q1 2026 | 1,265 | $60.6B |
| Q4 2025 | 1,288 | $66.7B |
| Q3 2025 | 1,254 | $66.3B |
| Q2 2025 | 1,232 | $69.3B |
| Q1 2025 | 1,275 | $77.1B |
| Q4 2024 | 1,195 | $69.1B |
| Q3 2024 | 1,148 | $66.1B |
| Q2 2024 | 1,110 | $55.4B |
| Q1 2024 | 1,086 | $57.4B |
| Q4 2023 | 1,066 | $49.8B |
| Q3 2023 | 1,048 | $56.4B |
| Q2 2023 | 1,024 | $61.2B |
| Q1 2023 | 1,014 | $55.7B |
| Q4 2022 | 1,034 | $52.6B |
| Q3 2022 | 950 | $48.4B |
| Q2 2022 | 966 | $49.5B |
| Q1 2022 | 985 | $61.2B |
| Q4 2021 | 995 | $56.5B |
| Q3 2021 | 917 | $57.2B |
| Q2 2021 | 912 | $53.4B |
| Q1 2021 | 919 | $51.4B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Aon plc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 20,171,049 | $7.12B | 0.10% | +191,658+1.0% | Added |
| BlackRock, Inc. | 16,236,934 | $5.73B | 0.10% | +390,348+2.5% | Added |
| Capital World Investors | 12,252,904 | $4.32B | 0.59% | +176,207+1.5% | Added |
| State Street Corp | 9,203,973 | $3.25B | 0.11% | −25,491−0.3% | Reduced |
| Massachusetts Financial Services Co | 8,545,036 | $3.02B | 0.97% | −212,650−2.4% | Reduced |
| Dodge & Cox | 7,852,456 | $2.77B | 1.50% | +4,387,773+126.6% | Added |
| Morgan Stanley | 5,570,506 | $1.97B | 0.12% | −565,880−9.2% | Reduced |
| Geode Capital Management, LLC | 5,141,363 | $1.81B | 0.11% | +28,066+0.5% | Added |
| Berkshire Hathaway IncSuperinvestorBerkshire Hathaway | 3,602,995 | $1.27B | 0.46% | −497,005−12.1% | Reduced |
| Bank of New York Mellon Corp | 3,479,061 | $1.23B | 0.22% | −236,285−6.4% | Reduced |
| Norges Bank | 3,275,848 | $1.16B | 0.12% | +3,275,848 | New |
| JPMorgan Chase & Co | 3,192,216 | $1.13B | 0.08% | −154,981−4.6% | Reduced |
| Farallon Capital Management, L.L.C. | 2,665,238 | $940.5M | 4.89% | +387,221+17.0% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 2,415,006 | $852.2M | 0.75% | +2,388,314+8,947.7% | Added |
| Eagle Capital Management LLC | 2,269,414 | $800.8M | 2.49% | −14,737−0.6% | Reduced |
| Independent Franchise Partners LLP | 2,115,523 | $746.5M | 4.75% | +19,037+0.9% | Added |
| Northern Trust Corp | 2,099,652 | $740.9M | 0.09% | −113,417−5.1% | Reduced |
| WCM Investment Management, LLC | 1,986,128 | $708.0M | 1.46% | −51,715−2.5% | Reduced |
| Veritas Asset Management LLP | 1,992,453 | $703.1M | 7.19% | −61,220−3.0% | Reduced |
| Polen Capital Management LLC | 1,846,294 | $651.5M | 2.78% | −643,873−25.9% | Reduced |
| Neuberger Berman Group LLC | 1,804,303 | $636.7M | 0.47% | −526,060−22.6% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,812,888 | $624.1M | 0.42% | −10,554−0.6% | Reduced |
| Boston Partners | 1,635,007 | $576.3M | 0.60% | −76,243−4.5% | Reduced |
| Diamond Hill Capital Management Inc | 1,596,315 | $563.3M | 2.89% | +32,494+2.1% | Added |
| Mawer Investment Management Ltd. | 1,477,693 | $521.4M | 2.92% | −1,020,396−40.8% | Reduced |
| Goldman Sachs Group Inc | 1,409,797 | $497.5M | 0.07% | +98,103+7.5% | Added |
| Bank of America Corp | 1,360,588 | $480.1M | 0.03% | −74,787−5.2% | Reduced |
| Legal & General Group Plc | 1,350,069 | $476.4M | 0.11% | −60,273−4.3% | Reduced |
| FMR LLC | 1,341,164 | $473.3M | 0.02% | +757,820+129.9% | Added |
| Invesco Ltd. | 1,336,129 | $471.5M | 0.04% | +86,717+6.9% | Added |
| Charles Schwab Investment Management Inc | 1,310,740 | $462.5M | 0.07% | +15,619+1.2% | Added |
| Lazard Asset Management LLC | 1,286,072 | $453.8M | 0.77% | +25,652+2.0% | Added |
| Capital International Investors | 1,255,765 | $443.4M | 0.07% | −500,692−28.5% | Reduced |
| Cantillon Capital Management LLC | 1,243,018 | $438.6M | 2.37% | +9,277+0.8% | Added |
| UBS Asset Management Americas Inc | 1,239,308 | $437.3M | 0.09% | −64,538−4.9% | Reduced |
| Sustainable Growth Advisers, LP | 1,221,467 | $431.0M | 2.99% | −95,897−7.3% | Reduced |
| Amundi | 1,217,341 | $429.6M | 0.12% | −165,796−12.0% | Reduced |
| Artisan Partners Limited Partnership | 1,117,428 | $394.3M | 0.60% | −149,342−11.8% | Reduced |
| Ameriprise Financial Inc | 1,108,214 | $391.1M | 0.09% | −73,530−6.2% | Reduced |
| Longview Partners (Guernsey) LTD | 1,105,784 | $390.2M | 4.07% | −50,970−4.4% | Reduced |
| Dimensional Fund Advisors LP | 1,040,718 | $367.3M | 0.08% | +96,885+10.3% | Added |
| Royal Bank of Canada | 954,748 | $336.9M | 0.06% | +8,915+0.9% | Added |
| FIL Ltd | 883,757 | $311.9M | 0.23% | −44,456−4.8% | Reduced |
| UBS Group AG | 820,117 | $289.4M | 0.06% | −375,721−31.4% | Reduced |
| Nuveen, LLC | 808,183 | $285.2M | 0.07% | −240,461−22.9% | Reduced |
| Deutsche Bank AG | 795,630 | $280.8M | 0.09% | +182,923+29.9% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 783,650 | $276.5M | 0.73% | −630,968−44.6% | Reduced |
| Vontobel Holding Ltd. | 760,139 | $268.2M | 0.88% | −129,193−14.5% | Reduced |
| USS Investment Management Ltd | 681,743 | $240.6M | 1.20% | +40,969+6.4% | Added |
| First Pacific Advisors, LP | 656,531 | $231.7M | 3.05% | +2,086+0.3% | Added |
| Altrinsic Global Advisors LLC | 651,207 | $229.8M | 8.24% | −31,679−4.6% | Reduced |
| Southpoint Capital Advisors LP | 650,000 | $229.4M | 5.33% | +650,000 | New |
| Millennium Management LLC | 636,922 | $224.8M | 0.16% | +140,336+28.3% | Added |
| California Public Employees Retirement System | 608,213 | $214.6M | 0.12% | −99,750−14.1% | Reduced |
| Adage Capital Partners GP, L.L.C. | 606,569 | $214.0M | 0.32% | −39,500−6.1% | Reduced |
| Barclays PLC | 588,544 | $207.7M | 0.08% | −85,174−12.6% | Reduced |
| Price T Rowe Associates Inc | 578,391 | $204.1M | 0.02% | −35,748−5.8% | Reduced |
| Omers Administration Corp | 567,479 | $200.3M | 1.43% | −33,938−5.6% | Reduced |
| Swiss National Bank | 561,340 | $198.1M | 0.12% | −29,960−5.1% | Reduced |
| Colony Group, LLC | 546,204 | $192.8M | 0.22% | +436,093+396.0% | Added |
| Fiera Capital Corp | 533,582 | $188.3M | 0.60% | −15,752−2.9% | Reduced |
| Blair William & Co | 496,307 | $175.1M | 0.47% | −33,466−6.3% | Reduced |
| National Pension Service | 472,500 | $166.7M | 0.12% | +52,077+12.4% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 470,902 | $166.2M | 0.10% | −17,135−3.5% | Reduced |
| Voya Investment Management LLC | 466,216 | $164.5M | 0.16% | −94,537−16.9% | Reduced |
| SEI Investments Co | 461,800 | $163.0M | 0.16% | +90,642+24.4% | Added |
| Arrowstreet Capital, Limited Partnership | 456,552 | $161.1M | 0.09% | +279,467+157.8% | Added |
| Citadel Advisors LLC | 442,286 | $156.1M | 0.11% | −465,334−51.3% | Reduced |
| C WorldWide Group Holding A/S | 432,180 | $152.5M | 2.66% | −85,128−16.5% | Reduced |
| AQR Capital Management LLC | 430,173 | $151.8M | 0.08% | +315,785+276.1% | Added |
| BNP Paribas Arbitrage, SA | 422,064 | $148.9M | 0.09% | +185,296+78.3% | Added |
| Douglass Winthrop Advisors, LLC | 392,615 | $138.5M | 2.42% | −9,285−2.3% | Reduced |
| Balyasny Asset Management LLC | 387,013 | $136.6M | 0.26% | −459,702−54.3% | Reduced |
| Rhumbline Advisers | 383,823 | $135.4M | 0.11% | −11,216−2.8% | Reduced |
| Haverford Trust Co | 351,168 | $123.9M | 1.11% | −28,917−7.6% | Reduced |
| Envestnet Asset Management Inc | 344,312 | $121.5M | 0.04% | −69,179−16.7% | Reduced |
| Bowie Capital Management, LLC | 344,149 | $121.4M | 5.01% | −12,738−3.6% | Reduced |
| Wells Fargo & Company | 340,049 | $120.0M | 0.02% | −31,819−8.6% | Reduced |
| Natixis Advisors, L.P. | 334,511 | $118.0M | 0.17% | −21,315−6.0% | Reduced |
| Aviva PLC | 333,454 | $117.7M | 0.20% | +6,622+2.0% | Added |
| Mackenzie Financial Corp | 328,701 | $116.9M | 0.14% | −132,567−28.7% | Reduced |
| California State Teachers Retirement System | 318,341 | $112.3M | 0.11% | −7,233−2.2% | Reduced |
| Bank of Montreal | 315,972 | $111.5M | 0.05% | −90,680−22.3% | Reduced |
| Russell Investments Group, Ltd. | 306,498 | $108.2M | 0.12% | +12,821+4.4% | Added |
| Cryder Capital Partners LLP | 295,151 | $104.2M | 6.15% | +63,837+27.6% | Added |
| Franklin Resources Inc | 290,264 | $102.4M | 0.03% | +212,037+271.1% | Added |
| Bristol John W & Co Inc | 286,128 | $101.0M | 1.55% | +41,384+16.9% | Added |
| Wealthspire Advisors, LLC | 273,596 | $96.5M | 0.77% | +42,739+18.5% | Added |
| Lord, Abbett & Co. LLC | 272,046 | $96.0M | 0.29% | +22,878+9.2% | Added |
| Davenport & Co LLC | 269,360 | $95.3M | 0.52% | −2,532−0.9% | Reduced |
| BloombergSen Inc. | 262,750 | $92.7M | 9.79% | −20,334−7.2% | Reduced |
| Comgest Global Investors S.A.S. | 256,800 | $90.6M | 1.61% | +243,700+1,860.3% | Added |
| Woodline Partners LP | 256,381 | $90.5M | 0.35% | −23,704−8.5% | Reduced |
| Principal Financial Group Inc | 248,481 | $87.7M | 0.04% | −8,150−3.2% | Reduced |
| Raymond James Financial Inc | 246,645 | $87.0M | 0.03% | −13,742−5.3% | Reduced |
| New York State Common Retirement Fund | 242,632 | $85.6M | 0.11% | −75,464−23.7% | Reduced |
| DekaBank Deutsche Girozentrale | 275,444 | $85.0M | 0.16% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 232,033 | $81.9M | 0.07% | −15,389−6.2% | Reduced |
| Citigroup Inc | 222,425 | $78.5M | 0.05% | −16,895−7.1% | Reduced |
| Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management | 218,735 | $77.2M | 4.58% | +5,285+2.5% | Added |