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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- Aon Plc (AON) stock institutional ownership
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q4 2023 | Jensen Investment Management | Buy | 110 | 5,340 | $1,554,047 |
| Q3 2023 | Sequoia Financial Advisors | Sell | -20 | 7,122 | $2,309,238 |
| Q3 2023 | Polen Capital Management | Buy | 4,422 | 815,290 | $264,333,486 |
| Q3 2023 | Cantillon Capital Management | Sell | -4,881 | 1,249,967 | $405,264,301 |
| Q3 2023 | Eagle Capital Management | Sell | -66,420 | 1,740,289 | $564,236,500 |
| Q3 2023 | Berkshire Hathaway | Sell | -235,000 | 4,100,000 | $1,329,302,000 |
| Q3 2023 | Jensen Investment Management | Buy | 410 | 5,230 | $1,695,671 |
| Q2 2023 | Sequoia Financial Advisors | Sell | -11 | 7,142 | $2,465,352 |
| Q2 2023 | Polen Capital Management | Sell | -13,636 | 810,868 | $279,911,655 |
| Q2 2023 | Cantillon Capital Management | Buy | 74,932 | 1,254,848 | $433,173,530 |
| Q2 2023 | Eagle Capital Management | Sell | -115,854 | 1,806,709 | $623,675,947 |
| Q2 2023 | Jensen Investment Management | Buy | 720 | 4,820 | $1,663,864 |
| Q1 2023 | Sequoia Financial Advisors | Sell | -241 | 7,153 | $2,255,206 |
| Q1 2023 | Polen Capital Management | Sell | -173,866 | 824,504 | $259,957,898 |
| Q1 2023 | Cantillon Capital Management | Sell | -20,670 | 1,179,916 | $372,015,716 |
| Q1 2023 | Eagle Capital Management | Sell | -404,639 | 1,922,563 | $606,164,888 |
| Q1 2023 | Berkshire Hathaway | Sell | -61,000 | 4,335,000 | $1,366,782,150 |
| Q1 2023 | Jensen Investment Management | Buy | 460 | 4,100 | $1,283,300 |
| Q4 2022 | Eagle Capital Management | Sell | -1,043,496 | 2,327,202 | $698,486,408 |
| Q4 2022 | Renaissance Technologies LLC | Sell | -35,200 | 51,800 | $15,547 |
| Q4 2022 | Sequoia Financial Advisors | Buy | 6,014 | 7,394 | $2,219,171 |
| Q4 2022 | Polen Capital Management | Sell | -66,219 | 998,370 | $299,650,721 |
| Q4 2022 | Cantillon Capital Management | Sell | -21,328 | 1,200,586 | $360,343,882 |
| Q4 2022 | Jensen Investment Management | Buy | 3,640 | 3,640 | $1,092,510 |
| Q3 2022 | Eagle Capital Management | Sell | -401,516 | 3,370,698 | $902,909 |
| Q3 2022 | Sequoia Financial Advisors | Sell | -473 | 1,380 | $370 |
| Q3 2022 | Renaissance Technologies LLC | Sell | -151,100 | 87,000 | $23,305 |
| Q3 2022 | Polen Capital Management | Buy | 130,250 | 1,064,589 | $285,171 |
| Q3 2022 | Cantillon Capital Management | Sell | -11,477 | 1,221,914 | $327,315 |
| Q2 2022 | Eagle Capital Management | Sell | -716,277 | 3,772,214 | $1,017,291 |
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.