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, Q3 2025
Institutional positions in Aon plc as of Sep 30, 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
- 1,254
- +42 vs. Q2 2025
- Shares held
- 186.0M
- −1.74M (−0.9%) vs. Q2 2025
- Total value
- $66.3B
- −$638.0M (−1.0%) vs. Q2 2025
- New holders
- 127
- 477 more added
- Sold out
- 85
- 401 more reduced
20 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Aon plc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 19,979,391 | $7.12B | 0.11% | −310,352−1.5% | Reduced |
| BlackRock, Inc. | 15,846,586 | $5.65B | 0.10% | −84,174−0.5% | Reduced |
| Capital World Investors | 12,076,697 | $4.31B | 0.59% | −67,540−0.6% | Reduced |
| State Street Corp | 9,229,464 | $3.29B | 0.11% | +105,154+1.2% | Added |
| Massachusetts Financial Services Co | 8,757,686 | $3.12B | 0.97% | −194,325−2.2% | Reduced |
| Morgan Stanley | 6,136,386 | $2.19B | 0.13% | −3,331,026−35.2% | Reduced |
| Geode Capital Management, LLC | 5,113,297 | $1.82B | 0.12% | −474,982−8.5% | Reduced |
| Berkshire Hathaway IncSuperinvestorBerkshire Hathaway | 4,100,000 | $1.46B | 0.55% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 3,715,346 | $1.32B | 0.24% | +207,690+5.9% | Added |
| Dodge & Cox | 3,464,683 | $1.24B | 0.67% | +3,464,683 | New |
| JPMorgan Chase & Co | 3,347,197 | $1.19B | 0.08% | −1,352,405−28.8% | Reduced |
| Mawer Investment Management Ltd. | 2,498,089 | $890.8M | 4.63% | −473,444−15.9% | Reduced |
| Polen Capital Management LLC | 2,490,167 | $887.9M | 2.88% | −255,460−9.3% | Reduced |
| Neuberger Berman Group LLC | 2,330,363 | $830.9M | 0.61% | +249,549+12.0% | Added |
| Eagle Capital Management LLC | 2,284,151 | $814.5M | 2.59% | −1080.0% | Reduced |
| Farallon Capital Management, L.L.C. | 2,278,017 | $812.3M | 4.59% | +291,600+14.7% | Added |
| Northern Trust Corp | 2,213,069 | $789.1M | 0.10% | −55,614−2.5% | Reduced |
| Independent Franchise Partners LLP | 2,096,486 | $747.6M | 4.93% | +615,570+41.6% | Added |
| Veritas Asset Management LLP | 2,053,673 | $732.3M | 7.82% | +332,685+19.3% | Added |
| WCM Investment Management, LLC | 2,037,843 | $722.7M | 1.50% | −2,400−0.1% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,823,442 | $650.2M | 0.47% | −883,462−32.6% | Reduced |
| Capital International Investors | 1,756,457 | $626.2M | 0.10% | +53,377+3.1% | Added |
| Boston Partners | 1,711,250 | $611.0M | 0.63% | +230,098+15.5% | Added |
| Diamond Hill Capital Management Inc | 1,563,821 | $557.6M | 2.65% | −10,690−0.7% | Reduced |
| Bank of America Corp | 1,435,375 | $511.8M | 0.04% | +11,387+0.8% | Added |
| Amundi | 1,383,137 | $505.8M | 0.16% | +393,951+39.8% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,414,618 | $504.4M | 1.31% | +1,414,618 | New |
| Legal & General Group Plc | 1,410,342 | $502.9M | 0.11% | +103,427+7.9% | Added |
| Sustainable Growth Advisers, LP | 1,317,364 | $469.7M | 2.75% | −529,776−28.7% | Reduced |
| Goldman Sachs Group Inc | 1,311,694 | $467.7M | 0.07% | +52,785+4.2% | Added |
| UBS Asset Management Americas Inc | 1,303,846 | $464.9M | 0.10% | −239,123−15.5% | Reduced |
| Charles Schwab Investment Management Inc | 1,295,121 | $461.8M | 0.07% | +11,100+0.9% | Added |
| Artisan Partners Limited Partnership | 1,266,770 | $451.7M | 0.65% | −909,275−41.8% | Reduced |
| Lazard Asset Management LLC | 1,260,420 | $449.4M | 0.61% | −562,466−30.9% | Reduced |
| Invesco Ltd. | 1,249,412 | $445.5M | 0.07% | +1,547+0.1% | Added |
| Cantillon Capital Management LLC | 1,233,741 | $439.9M | 2.42% | −13,613−1.1% | Reduced |
| UBS Group AG | 1,195,838 | $426.4M | 0.08% | −24,148−2.0% | Reduced |
| Ameriprise Financial Inc | 1,181,744 | $421.4M | 0.10% | +121,116+11.4% | Added |
| Longview Partners (Guernsey) LTD | 1,156,754 | $412.5M | 4.31% | −151,207−11.6% | Reduced |
| Nuveen, LLC | 1,048,644 | $373.9M | 0.10% | +3,421+0.3% | Added |
| Royal Bank of Canada | 945,833 | $337.3M | 0.06% | +296,006+45.6% | Added |
| Dimensional Fund Advisors LP | 943,833 | $336.5M | 0.07% | +47,335+5.3% | Added |
| FIL Ltd | 928,213 | $331.0M | 0.26% | −63,443−6.4% | Reduced |
| Citadel Advisors LLC | 907,620 | $323.6M | 0.26% | +778,136+601.0% | Added |
| Vontobel Holding Ltd. | 889,332 | $317.1M | 1.00% | +428,361+92.9% | Added |
| Balyasny Asset Management LLC | 846,715 | $301.9M | 0.61% | +846,715 | New |
| California Public Employees Retirement System | 707,963 | $252.4M | 0.15% | −26,536−3.6% | Reduced |
| Altrinsic Global Advisors LLC | 682,886 | $243.5M | 9.01% | −9,747−1.4% | Reduced |
| Barclays PLC | 673,718 | $240.2M | 0.09% | +22,872+3.5% | Added |
| First Pacific Advisors, LP | 654,445 | $233.4M | 3.23% | +2,426+0.4% | Added |
| Adage Capital Partners GP, L.L.C. | 646,069 | $230.4M | 0.36% | +343,800+113.7% | Added |
| USS Investment Management Ltd | 640,774 | $228.3M | 1.10% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 614,139 | $219.0M | 0.02% | −7,437−1.2% | Reduced |
| Deutsche Bank AG | 612,707 | $218.5M | 0.07% | +202,326+49.3% | Added |
| Omers Administration Corp | 601,417 | $214.5M | 1.54% | 00.0% | Unchanged |
| Swiss National Bank | 591,300 | $210.8M | 0.12% | +2,900+0.5% | Added |
| FMR LLC | 583,344 | $208.0M | 0.01% | −874,384−60.0% | Reduced |
| First Trust Advisors LP | 562,977 | $200.7M | 0.15% | +10,372+1.9% | Added |
| Voya Investment Management LLC | 560,753 | $200.0M | 0.20% | −117,888−17.4% | Reduced |
| Fiera Capital Corp | 549,334 | $195.9M | 0.63% | +27,530+5.3% | Added |
| Blair William & Co | 529,773 | $188.9M | 0.50% | −38,214−6.7% | Reduced |
| C WorldWide Group Holding A/S | 517,308 | $184.5M | 2.84% | −103,352−16.7% | Reduced |
| Millennium Management LLC | 496,586 | $177.1M | 0.14% | +489,463+6,871.6% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 488,037 | $174.0M | 0.10% | +24,241+5.2% | Added |
| Mackenzie Financial Corp | 461,268 | $164.5M | 0.20% | −222,288−32.5% | Reduced |
| Wellington Management Group LLP | 445,208 | $158.8M | 0.03% | −668,525−60.0% | Reduced |
| National Pension Service | 420,423 | $149.9M | 0.12% | +3,962+1.0% | Added |
| Envestnet Asset Management Inc | 413,491 | $147.4M | 0.04% | −15,000−3.5% | Reduced |
| Bank of Montreal | 406,652 | $145.0M | 0.06% | +82,970+25.6% | Added |
| Douglass Winthrop Advisors, LLC | 401,900 | $143.3M | 2.50% | +4,813+1.2% | Added |
| Rhumbline Advisers | 395,039 | $140.9M | 0.11% | +656+0.2% | Added |
| Haverford Trust Co | 380,085 | $135.5M | 1.22% | −5,217−1.4% | Reduced |
| Wells Fargo & Company | 371,868 | $132.6M | 0.03% | −35,028−8.6% | Reduced |
| SEI Investments Co | 371,158 | $132.3M | 0.14% | −33,811−8.3% | Reduced |
| Kovitz Investment Group Partners, LLC | 358,759 | $127.9M | 0.50% | +42,758+13.5% | Added |
| Bowie Capital Management, LLC | 356,887 | $127.3M | 5.73% | +84,446+31.0% | Added |
| Natixis Advisors, L.P. | 355,826 | $126.9M | 0.19% | +101,921+40.1% | Added |
| Prana Capital Management, LP | 340,562 | $121.4M | 4.05% | −176,945−34.2% | Reduced |
| Aviva PLC | 326,832 | $116.5M | 0.21% | +15,292+4.9% | Added |
| California State Teachers Retirement System | 325,574 | $116.1M | 0.12% | +12,956+4.1% | Added |
| New York State Common Retirement Fund | 318,096 | $113.4M | 0.15% | −15,020−4.5% | Reduced |
| Janus Henderson Group PLC | 314,591 | $112.2M | 0.05% | +155,974+98.3% | Added |
| Russell Investments Group, Ltd. | 293,677 | $104.7M | 0.12% | +2,017+0.7% | Added |
| BloombergSen Inc. | 283,084 | $100.9M | 8.57% | −2,943−1.0% | Reduced |
| Woodline Partners LP | 280,085 | $99.9M | 0.47% | −132,868−32.2% | Reduced |
| DekaBank Deutsche Girozentrale | 275,444 | $97.3M | 0.16% | 00.0% | Unchanged |
| Davenport & Co LLC | 271,892 | $96.8M | 0.52% | −4,233−1.5% | Reduced |
| Fiducient Advisors LLC | 265,167 | $94.6M | 11.05% | −73,033−21.6% | Reduced |
| Raymond James Financial Inc | 260,387 | $92.8M | 0.03% | +8,357+3.3% | Added |
| Assenagon Asset Management S.A. | 258,654 | $92.2M | 0.14% | +85,047+49.0% | Added |
| Principal Financial Group Inc | 256,631 | $91.5M | 0.05% | −4,701−1.8% | Reduced |
| Lord, Abbett & Co. LLC | 249,168 | $88.8M | 0.26% | +3,729+1.5% | Added |
| Alyeska Investment Group, L.P. | 247,977 | $88.4M | 0.27% | −128,737−34.2% | Reduced |
| Manufacturers Life Insurance Company, The | 247,422 | $88.2M | 0.07% | −63,892−20.5% | Reduced |
| Bristol John W & Co Inc | 244,744 | $87.3M | 1.38% | −4,798−1.9% | Reduced |
| Citigroup Inc | 239,320 | $85.3M | 0.06% | +42,656+21.7% | Added |
| BNP Paribas Arbitrage, SA | 236,768 | $84.4M | 0.07% | −58,783−19.9% | Reduced |
| Alliancebernstein L.P. | 235,760 | $84.1M | 0.03% | −56,450−19.3% | Reduced |
| Cryder Capital Partners LLP | 231,314 | $82.5M | 4.55% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 230,883 | $82.3M | 0.14% | −8,443−3.5% | Reduced |