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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, Q1 2021

Institutional positions in Aon plc as of Mar 31, 2021. 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
919
No complete 13F data for Q4 2020
Shares held
223.5M
No complete 13F data for Q4 2020
Total value
$51.4B
No complete 13F data for Q4 2020

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.

Institutional holdersQ1 2021: 919 institutions
Q1 2021: 919 institutionsQ2 2021: 912 institutionsQ3 2021: 917 institutionsQ4 2021: 995 institutionsQ1 2022: 985 institutionsQ2 2022: 966 institutionsQ3 2022: 950 institutionsQ4 2022: 1,034 institutionsQ1 2023: 1,014 institutionsQ2 2023: 1,024 institutionsQ3 2023: 1,048 institutionsQ4 2023: 1,066 institutionsQ1 2024: 1,086 institutionsQ2 2024: 1,110 institutionsQ3 2024: 1,148 institutionsQ4 2024: 1,195 institutionsQ1 2025: 1,275 institutionsQ2 2025: 1,232 institutionsQ3 2025: 1,254 institutionsQ4 2025: 1,288 institutionsQ1 2026: 1,265 institutionsQ2 2026: 1,273 institutions
Value heldQ1 2021: $51.4B
Q1 2021: $51.4BQ2 2021: $53.4BQ3 2021: $57.2BQ4 2021: $56.5BQ1 2022: $61.2BQ2 2022: $49.5BQ3 2022: $48.4BQ4 2022: $52.6BQ1 2023: $55.7BQ2 2023: $61.2BQ3 2023: $56.4BQ4 2023: $49.8BQ1 2024: $57.4BQ2 2024: $55.4BQ3 2024: $66.1BQ4 2024: $69.1BQ1 2025: $77.1BQ2 2025: $69.3BQ3 2025: $66.3BQ4 2025: $66.7BQ1 2026: $60.6BQ2 2026: $63.9B
Institutions holding AON and their total value by quarter
QuarterHoldersValue
Q2 20261,273$63.9B
Q1 20261,265$60.6B
Q4 20251,288$66.7B
Q3 20251,254$66.3B
Q2 20251,232$69.3B
Q1 20251,275$77.1B
Q4 20241,195$69.1B
Q3 20241,148$66.1B
Q2 20241,110$55.4B
Q1 20241,086$57.4B
Q4 20231,066$49.8B
Q3 20231,048$56.4B
Q2 20231,024$61.2B
Q1 20231,014$55.7B
Q4 20221,034$52.6B
Q3 2022950$48.4B
Q2 2022966$49.5B
Q1 2022985$61.2B
Q4 2021995$56.5B
Q3 2021917$57.2B
Q2 2021912$53.4B
Q1 2021919$51.4B

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding Aon plc.

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding AON in Q1 2021
InstitutionSharesValue% of portfolioChange in sharesAction
Envestnet Asset Management Inc207,104$47.7M0.03%––
Laurion Capital Management LP217,204$50.0M0.68%––
CIBC Asset Management Inc231,356$53.2M0.23%––
Marathon Asset Management LLP240,356$55.3M0.77%––
New York State Teachers Retirement System252,305$58.1M0.12%––
Jackson Square Partners, LLC259,148$59.6M0.34%––
Raymond James & Associates261,195$60.1M0.06%––
Marshall Wace North America L.P.262,819$60.5M0.25%––
Cooper Investors Pty Ltd270,886$62.3M4.64%––
Bain Capital Public Equity Management II, LLC271,162$62.4M2.60%––
Manufacturers Life Insurance Company, The273,545$62.9M0.05%––
AustralianSuper Pty Ltd279,629$64.3M0.50%––
Allianz Asset Management GmbH285,104$65.6M0.07%––
Los Angeles Capital Management LLC288,391$66.4M0.30%––
State Board of Administration of Florida Retirement System293,412$67.5M0.13%––
CIBC World Markets Corp294,282$67.7M0.43%––
Bank of Montreal298,244$70.1M0.05%––
Omers Administration Corp311,100$71.6M1.13%––
Douglass Winthrop Advisors, LLC313,864$72.2M1.94%––
Alua Capital Management LP324,800$74.7M4.25%––
Davenport & Co LLC336,606$77.5M0.73%––
Marshall Wace, LLP344,899$79.4M0.42%––
Atlanta Capital Management Co L L C354,735$81.6M0.29%––
Alliancebernstein L.P.357,776$82.3M0.04%––
Citadel Advisors LLC358,839$82.6M0.09%––
Rhumbline Advisers368,046$84.7M0.12%––
California State Teachers Retirement System373,127$85.9M0.11%––
Norges Bank382,567$88.0M0.02%––
Russell Investments Group, Ltd.390,331$89.9M0.16%––
Polar Capital Holdings Plc397,500$91.5M0.57%––
Capital International Inc401,578$92.4M0.86%––
Natixis Advisors, L.P.412,912$95.0M0.50%––
Nicholas Company, Inc.416,255$95.8M1.79%––
Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management422,850$97.3M4.30%––
Wells Fargo & Company424,578$97.7M0.02%––
APG Asset Management N.V.502,504$98.4M0.17%––
Maverick Capital LtdSuperinvestorMaverick Capital439,355$101.1M0.95%––
Rivulet Capital, LLC450,100$103.6M5.62%––
Swedbank AB450,368$103.6M0.22%––
Kovitz Investment Group Partners, LLC469,480$108.0M2.53%––
Millennium Management LLC489,959$112.7M0.16%––
Frontier Capital Management Co LLC490,774$112.9M0.85%––
USS Investment Management Ltd517,104$119.0M1.05%––
Polen Capital Management LLC526,184$121.1M0.27%––
Citigroup Inc528,921$121.7M0.12%––
Capital Bank & Trust Co537,057$123.6M1.47%––
Generation Investment Management LLP538,770$124.0M0.52%––
Senator Investment Group LP539,000$124.0M2.55%––
Broad Run Investment Management, LLC541,545$124.6M8.29%––
Blair William & Co554,704$127.6M0.48%––
Eminence Capital, LP568,111$130.7M1.62%––
BloombergSen Inc.572,573$131.8M9.61%––
Morgan Stanley578,784$133.2M0.02%––
Pensioenfonds Rail & Ov585,712$134.8M3.06%––
State of Wisconsin Investment Board625,337$143.9M0.31%––
Credit Suisse AG625,569$143.9M0.11%––
First Trust Advisors LP684,989$157.6M0.19%––
Barrow Hanley Mewhinney & Strauss LLC694,010$159.7M0.51%––
Parametric Portfolio Associates LLC709,247$163.2M0.09%––
Two Sigma Advisers, LP711,300$163.7M0.45%––
Ensign Peak Advisors, Inc716,623$164.9M0.35%––
JPMorgan Chase & Co717,259$165.0M0.02%––
Deutsche Bank AG748,741$172.3M0.09%––
Southpoint Capital Advisors LP750,000$172.6M2.77%––
Vaughan Nelson Investment Management, L.P.751,336$172.9M1.85%––
DSM Capital Partners LLC764,505$175.9M1.87%––
Waddell & Reed Financial Inc792,887$182.5M0.38%––
Tesco Pension Investment Ltd804,461$185.1M3.50%––
New York State Common Retirement Fund821,188$189.0M0.21%––
Bessemer Group Inc823,940$189.6M0.45%––
Meritage Group LP836,106$192.4M3.69%––
Boston Partners930,761$214.2M0.29%––
Swiss National Bank982,049$226.0M0.15%––
Charles Schwab Investment Management Inc1,001,477$230.4M0.08%––
Two Sigma Investments, LP1,056,418$243.1M0.74%––
Dimensional Fund Advisors LP1,072,512$246.8M0.08%––
Renaissance Technologies LLC1,101,278$253.4M0.32%––
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main1,132,315$260.6M0.49%––
First Pacific Advisors, LP1,179,845$271.5M3.69%––
GQG Partners LLC1,244,317$286.3M1.05%––
Altrinsic Global Advisors LLC1,310,247$301.5M9.50%––
Cantillon Capital Management LLC1,336,974$307.7M2.24%––
Price T Rowe Associates Inc1,355,768$312.0M0.03%––
FMR LLC1,417,827$326.3M0.03%––
Arrowstreet Capital, Limited Partnership1,454,057$334.6M0.45%––
UBS Asset Management Americas Inc1,461,456$336.3M0.15%––
Ameriprise Financial Inc1,478,963$340.7M0.11%––
Legal & General Group Plc1,504,097$346.1M0.13%––
Brave Warrior Advisors, LLC1,529,149$351.9M11.49%––
Royal Bank of Canada1,594,672$366.9M0.11%––
Goldman Sachs Group Inc1,614,691$371.6M0.11%––
Bank of New York Mellon Corp1,719,745$395.7M0.08%––
Invesco Ltd.1,757,055$404.3M0.11%––
BlueSpruce Investments, LP1,758,520$404.7M8.03%––
California Public Employees Retirement System1,758,835$404.7M0.31%––
Principal Financial Group Inc1,758,963$404.8M0.28%––
Capital World Investors1,933,284$444.9M0.08%––
Viking Global Investors LPSuperinvestorViking Global Investors2,154,489$495.8M1.48%––
EdgePoint Investment Group Inc.2,347,602$540.2M4.25%––
Mackenzie Financial Corp2,374,632$546.4M0.83%––