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
Q2 2022Sequoia Financial AdvisorsBuy2201,853$500
Q2 2022Renaissance Technologies LLCSell-2,600238,100$64,211
Q2 2022Viking Global InvestorsSell-888,441704,639$190,027
Q2 2022Polen Capital ManagementSell-50,357934,339$251,973
Q2 2022Cantillon Capital ManagementSell-6,6091,233,391$332,621
Q1 2022Eagle Capital ManagementSell-191,5464,488,491$1,461,587
Q1 2022Sequoia Financial AdvisorsBuy9371,633$531
Q1 2022Renaissance Technologies LLCBuy37,000240,700$78,379
Q1 2022Polen Capital ManagementSell-57,712984,696$320,647
Q1 2022Cantillon Capital ManagementBuy35,9101,240,000$403,782
Q1 2022Viking Global InvestorsBuy82,5631,593,080$518,755
Q1 2022Disciplined Growth InvestorsSell-3461,939$631
Q4 2021Eagle Capital ManagementSell-1,666,6794,680,037$1,406,632
Q4 2021Sequoia Financial AdvisorsBuy696696$209
Q4 2021Renaissance Technologies LLCBuy93,800203,700$61,224
Q4 2021Polen Capital ManagementBuy20,1641,042,408$313,306
Q4 2021Cantillon Capital ManagementSell-89,0521,204,090$361,902
Q4 2021Viking Global InvestorsSell-1,392,5371,510,517$454,001
Q4 2021Disciplined Growth InvestorsBuy2,2852,285$687
Q3 2021Eagle Capital ManagementSell-213,6846,346,716$1,813,701
Q3 2021Renaissance Technologies LLCSell-1,435,201109,900$31,406
Q3 2021Polen Capital ManagementBuy209,5971,022,244$292,127
Q3 2021Cantillon Capital ManagementSell-23,2891,293,142$369,542
Q2 2021Eagle Capital ManagementSell-39,0766,560,400$1,566,361
Q2 2021Polen Capital ManagementBuy286,463812,647$194,028
Q2 2021Meritage GroupBuy5,866841,972$201,029
Q2 2021Cantillon Capital ManagementSell-20,5431,316,431$314,311
Q2 2021Renaissance Technologies LLCBuy443,8231,545,101$368,908
Q2 2021Viking Global InvestorsBuy748,5652,903,054$693,133
Q2 2021Berkshire HathawayBuy299,8544,396,000$1,049,589

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.