Aon Plc (AON) Institutional Ownership Changes & 13F Activity

Aon Plc (AON) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Eagle Capital Management, Baupost Group, Polen Capital Management, Meritage Group, and Viking Global Investors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2021Disciplined Growth InvestorsBuy2,2852,285$687
Q4 2021Sequoia Financial AdvisorsBuy696696$209
Q3 2021Renaissance Technologies LLCSell-1,435,201109,900$31,406
Q3 2021Eagle Capital ManagementSell-213,6846,346,716$1,813,701
Q3 2021Polen Capital ManagementBuy209,5971,022,244$292,127
Q3 2021Cantillon Capital ManagementSell-23,2891,293,142$369,542
Q2 2021Viking Global InvestorsBuy748,5652,903,054$693,133
Q2 2021Renaissance Technologies LLCBuy443,8231,545,101$368,908
Q2 2021Berkshire HathawayBuy299,8544,396,000$1,049,589
Q2 2021Polen Capital ManagementBuy286,463812,647$194,028
Q2 2021Eagle Capital ManagementSell-39,0766,560,400$1,566,361
Q2 2021Cantillon Capital ManagementSell-20,5431,316,431$314,311
Q2 2021Meritage GroupBuy5,866841,972$201,029
Q1 2021Berkshire HathawayBuy4,096,1464,096,146$942,564
Q1 2021Renaissance Technologies LLCBuy956,8771,101,278$253,415
Q1 2021Eagle Capital ManagementSell-553,3386,599,476$1,518,605
Q1 2021Viking Global InvestorsSell-416,1312,154,489$495,769
Q1 2021Polen Capital ManagementBuy148,879526,184$121,080
Q1 2021Cantillon Capital ManagementSell-49,6051,336,974$307,651
Q1 2021Meritage GroupSell-278836,106$192,396
Q4 2020Renaissance Technologies LLCSell-792,200144,401$30,508
Q4 2020Eagle Capital ManagementSell-524,4937,152,814$1,511,175
Q4 2020Viking Global InvestorsSell-442,2862,570,620$543,095
Q4 2020Polen Capital ManagementBuy49,548377,305$79,713
Q4 2020Cantillon Capital ManagementSell-9,0901,386,579$292,943
Q4 2020Meritage GroupSell-8,229836,384$176,703
Q3 2020Eagle Capital ManagementBuy1,231,6377,677,307$1,583,828
Q3 2020Meritage GroupBuy844,613844,613$174,244
Q3 2020Polen Capital ManagementBuy327,757327,757$67,616
Q3 2020First Eagle U.S. ValueSell-86,689119,500$24,653

Frequently asked questions about AON activity

  • Which institutional owners are buying AON?

    Institutional owners buying AON include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AON activity?

    "Buy" means an investor increased their reported position in AON compared to the prior reporting period. This reflects growing exposure to Aon Plc (AON) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AON increasing?

    Institutional interest in AON can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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