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
Q4 2025Cantillon Capital ManagementBuy9,2771,243,018$438,636,192
Q4 2025Polen Capital ManagementSell-643,8731,846,294$651,520,305
Q4 2025Eagle Capital ManagementSell-14,7372,269,414$800,830,660
Q4 2025Berkshire HathawaySell-497,0053,602,995$1,271,424,876
Q4 2025Viking Global InvestorsSell-630,968783,650$276,534,412
Q4 2025Jensen Investment ManagementBuy50310,603$3,741,587
Q3 2025Dodge & Cox Stock FundBuy3,464,6833,464,683$1,235,436,664
Q3 2025Sequoia Financial AdvisorsSell-14513,159$4,692,087
Q3 2025Cantillon Capital ManagementSell-13,6131,233,741$439,927,366
Q3 2025Eagle Capital ManagementSell-1082,284,151$814,482,459
Q3 2025Polen Capital ManagementSell-255,4602,490,167$887,943,817
Q3 2025Viking Global InvestorsBuy694,2541,414,618$504,424,486
Q3 2025Jensen Investment ManagementBuy30010,100$3,601,458
Q2 2025Yacktman Asset ManagementBuy1,24512,915$4,607,555
Q2 2025Sequoia Financial AdvisorsBuy3413,304$4,746,176
Q2 2025Cantillon Capital ManagementSell-36,1941,247,354$445,006,013
Q2 2025Eagle Capital ManagementSell-339,2302,284,259$814,932,312
Q2 2025Polen Capital ManagementSell-262,0922,745,627$979,529,926
Q2 2025Jensen Investment ManagementBuy9709,800$3,496,248
Q1 2025Matrix Advisors Value FundSell-43648$258,610
Q1 2025Sequoia Financial AdvisorsBuy20713,270$5,295,925
Q1 2025Renaissance Technologies LLCSell-102,30035,101$14,008,458
Q1 2025Cantillon Capital ManagementSell-39,6801,283,548$512,251,171
Q1 2025Eagle Capital ManagementSell-1,360,0672,623,489$1,047,008,225
Q1 2025Polen Capital ManagementBuy2,288,3973,007,719$1,200,350,430
Q4 2024Sequoia Financial AdvisorsBuy34213,063$4,691,704
Q4 2024Renaissance Technologies LLCSell-43,900137,401$49,348,943
Q4 2024Polen Capital ManagementSell-62,167719,322$258,351,618
Q4 2024Cantillon Capital ManagementBuy7,0101,323,228$475,250,568
Q4 2024Eagle Capital ManagementSell-2,6923,983,556$1,430,733,973

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.