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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
Massachusetts Financial Services Co19,666,670$4.53B1.39%––
Vanguard Group Inc17,439,617$4.01B0.11%––
BlackRock Inc.17,067,458$3.93B0.12%––
State Street Corp9,280,319$2.14B0.12%––
Capital International Investors8,838,427$2.03B0.51%––
Eagle Capital Management LLC6,599,476$1.52B4.68%––
Lazard Asset Management LLC5,939,591$1.37B1.66%––
Mawer Investment Management Ltd.5,836,834$1.34B7.29%––
Janus Henderson Group PLC4,826,680$1.11B0.51%––
WCM Investment Management, LLC4,556,107$1.05B2.87%––
Berkshire Hathaway IncSuperinvestorBerkshire Hathaway4,096,146$942.6M0.35%––
Neuberger Berman Group LLC4,014,679$923.5M0.88%––
Longview Partners (Guernsey) LTD3,656,651$841.4M4.47%––
Geode Capital Management, LLC3,586,447$822.9M0.13%––
Independent Franchise Partners LLP3,390,261$780.1M6.21%––
Bank of America Corp2,878,569$662.4M0.08%––
Northern Trust Corp2,873,210$661.2M0.12%––
Farallon Capital Management, L.L.C.2,454,194$564.7M2.94%––
Artisan Partners Limited Partnership2,391,795$550.4M0.71%––
Mackenzie Financial Corp2,374,632$546.4M0.83%––
EdgePoint Investment Group Inc.2,347,602$540.2M4.25%––
Viking Global Investors LPSuperinvestorViking Global Investors2,154,489$495.8M1.48%––
Capital World Investors1,933,284$444.9M0.08%––
Principal Financial Group Inc1,758,963$404.8M0.28%––
California Public Employees Retirement System1,758,835$404.7M0.31%––
BlueSpruce Investments, LP1,758,520$404.7M8.03%––
Invesco Ltd.1,757,055$404.3M0.11%––
Bank of New York Mellon Corp1,719,745$395.7M0.08%––
Goldman Sachs Group Inc1,614,691$371.6M0.11%––
Royal Bank of Canada1,594,672$366.9M0.11%––
Brave Warrior Advisors, LLC1,529,149$351.9M11.49%––
Legal & General Group Plc1,504,097$346.1M0.13%––
Ameriprise Financial Inc1,478,963$340.7M0.11%––
UBS Asset Management Americas Inc1,461,456$336.3M0.15%––
Arrowstreet Capital, Limited Partnership1,454,057$334.6M0.45%––
FMR LLC1,417,827$326.3M0.03%––
Price T Rowe Associates Inc1,355,768$312.0M0.03%––
Cantillon Capital Management LLC1,336,974$307.7M2.24%––
Altrinsic Global Advisors LLC1,310,247$301.5M9.50%––
GQG Partners LLC1,244,317$286.3M1.05%––
First Pacific Advisors, LP1,179,845$271.5M3.69%––
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main1,132,315$260.6M0.49%––
Renaissance Technologies LLC1,101,278$253.4M0.32%––
Dimensional Fund Advisors LP1,072,512$246.8M0.08%––
Two Sigma Investments, LP1,056,418$243.1M0.74%––
Charles Schwab Investment Management Inc1,001,477$230.4M0.08%––
Swiss National Bank982,049$226.0M0.15%––
Boston Partners930,761$214.2M0.29%––
Meritage Group LP836,106$192.4M3.69%––
Bessemer Group Inc823,940$189.6M0.45%––
New York State Common Retirement Fund821,188$189.0M0.21%––
Tesco Pension Investment Ltd804,461$185.1M3.50%––
Waddell & Reed Financial Inc792,887$182.5M0.38%––
DSM Capital Partners LLC764,505$175.9M1.87%––
Vaughan Nelson Investment Management, L.P.751,336$172.9M1.85%––
Southpoint Capital Advisors LP750,000$172.6M2.77%––
Deutsche Bank AG748,741$172.3M0.09%––
JPMorgan Chase & Co717,259$165.0M0.02%––
Ensign Peak Advisors, Inc716,623$164.9M0.35%––
Two Sigma Advisers, LP711,300$163.7M0.45%––
Parametric Portfolio Associates LLC709,247$163.2M0.09%––
Barrow Hanley Mewhinney & Strauss LLC694,010$159.7M0.51%––
First Trust Advisors LP684,989$157.6M0.19%––
Credit Suisse AG625,569$143.9M0.11%––
State of Wisconsin Investment Board625,337$143.9M0.31%––
Pensioenfonds Rail & Ov585,712$134.8M3.06%––
Morgan Stanley578,784$133.2M0.02%––
BloombergSen Inc.572,573$131.8M9.61%––
Eminence Capital, LP568,111$130.7M1.62%––
Blair William & Co554,704$127.6M0.48%––
Broad Run Investment Management, LLC541,545$124.6M8.29%––
Senator Investment Group LP539,000$124.0M2.55%––
Generation Investment Management LLP538,770$124.0M0.52%––
Capital Bank & Trust Co537,057$123.6M1.47%––
Citigroup Inc528,921$121.7M0.12%––
Polen Capital Management LLC526,184$121.1M0.27%––
USS Investment Management Ltd517,104$119.0M1.05%––
Frontier Capital Management Co LLC490,774$112.9M0.85%––
Millennium Management LLC489,959$112.7M0.16%––
Kovitz Investment Group Partners, LLC469,480$108.0M2.53%––
Swedbank AB450,368$103.6M0.22%––
Rivulet Capital, LLC450,100$103.6M5.62%––
Maverick Capital LtdSuperinvestorMaverick Capital439,355$101.1M0.95%––
APG Asset Management N.V.502,504$98.4M0.17%––
Wells Fargo & Company424,578$97.7M0.02%––
Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management422,850$97.3M4.30%––
Nicholas Company, Inc.416,255$95.8M1.79%––
Natixis Advisors, L.P.412,912$95.0M0.50%––
Capital International Inc401,578$92.4M0.86%––
Polar Capital Holdings Plc397,500$91.5M0.57%––
Russell Investments Group, Ltd.390,331$89.9M0.16%––
Norges Bank382,567$88.0M0.02%––
California State Teachers Retirement System373,127$85.9M0.11%––
Rhumbline Advisers368,046$84.7M0.12%––
Citadel Advisors LLC358,839$82.6M0.09%––
Alliancebernstein L.P.357,776$82.3M0.04%––
Atlanta Capital Management Co L L C354,735$81.6M0.29%––
Marshall Wace, LLP344,899$79.4M0.42%––
Davenport & Co LLC336,606$77.5M0.73%––
Alua Capital Management LP324,800$74.7M4.25%––