Aon Plc (AON) Stock Institutional Trading Activity


Aon Plc (AON) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Polen Capital Management, Viking Global Investors, Berkshire Hathaway, Eagle Capital Management, and Cantillon Capital Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2021Eagle Capital ManagementSell-553,3386,599,476$1,518,605
Q1 2021Polen Capital ManagementBuy148,879526,184$121,080
Q1 2021Meritage GroupSell-278836,106$192,396
Q1 2021Renaissance Technologies LLCBuy956,8771,101,278$253,415
Q1 2021Cantillon Capital ManagementSell-49,6051,336,974$307,651
Q1 2021Viking Global InvestorsSell-416,1312,154,489$495,769
Q1 2021Berkshire HathawayBuy4,096,1464,096,146$942,564
Q4 2020Eagle Capital ManagementSell-524,4937,152,814$1,511,175
Q4 2020Renaissance Technologies LLCSell-792,200144,401$30,508
Q4 2020Polen Capital ManagementBuy49,548377,305$79,713
Q4 2020Meritage GroupSell-8,229836,384$176,703
Q4 2020Cantillon Capital ManagementSell-9,0901,386,579$292,943
Q4 2020Viking Global InvestorsSell-442,2862,570,620$543,095
Q3 2020Eagle Capital ManagementBuy1,231,6377,677,307$1,583,828
Q3 2020First Eagle U.S. ValueSell-86,689119,500$24,653
Q3 2020Polen Capital ManagementBuy327,757327,757$67,616
Q3 2020Meritage GroupBuy844,613844,613$174,244
Q3 2020Renaissance Technologies LLCBuy51,900936,601$193,221
Q3 2020Cantillon Capital ManagementSell-15,9631,395,669$287,926
Q3 2020Viking Global InvestorsBuy56,8773,012,906$621,563
Q2 2020Eagle Capital ManagementBuy560,3126,445,670$1,241,436
Q2 2020Sound Shore ManagementSell-368,7441,150$221
Q2 2020Lountzis Asset ManagementBuy1,9001,900$366
Q2 2020Olstein Capital ManagementBuy9,0009,000$1,733
Q2 2020First Eagle U.S. ValueBuy206,189206,189$39,712
Q2 2020Renaissance Technologies LLCBuy884,701884,701$170,393
Q2 2020Cantillon Capital ManagementBuy1,411,6321,411,632$271,881
Q2 2020Viking Global InvestorsBuy2,956,0292,956,029$569,331
Q1 2020Eagle Capital ManagementBuy5,885,3585,885,358$971,319
Q1 2020Sound Shore ManagementBuy369,894369,894$61,047

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.