AON in the 13F filings
Aon PLC · CUSIP G0403H108
- Quarter end
- 31 Mar 2025
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 2 May 2025
- Managers listing it
- 24
- at least, of 95 tracked, among listed positions
- Comparable managers
- 95
- filed both Q4 2024 and Q1 2025; 17 listed it in both
- Shares listed
- 40,154,539
- combined, among listed positions
- Reported value
- $15.9bn
- combined, at the quarter end
1 line marked †. Value as filed implies a price far from other filers'. Each counts in holders and value as filed, and is left out of the net change in shares.
Among the 95 comparable managers: 16 buyers (opened or added shares) and 9 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.
Managers listing AON in Q1 2025
24 of 24 holders
Largest increases and reductions, by shares
Increases
- Polen Capital Management LLCexisting position · 3,007,719 shares now+2,288,397
- Wellington Management Group LLPnew position · 1,229,382 shares now+1,229,382
- Millennium Management LLCnew position · 425,678 shares now+425,678
- Invesco Ltdexisting position · 1,158,139 shares now+137,118
- Woodline Partners LPexisting position · 336,515 shares now+95,758
Reductions
- MFS Investment Managementexisting position · 9,832,327 shares now-1,783,997
- Farallon Capital Management LLCexisting position · 1,361,744 shares now-470,989
- Moore Capital Management LPexisting position · 32,379 shares now-154,997
- T. Rowe Price Associates Incexisting position · 661,596 shares now-46,127
- Balyasny Asset Management LLCexisting position · 428,842 shares now-36,239
New positions and exits
New (5)
Exited (2)
- Viking Global Investors LPwas $259m
- Two Sigma Advisers LPwas $23m
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q1 2020 | 1 | $1.0bn | n.a. | n.a. |
| Q2 2020 | 27 | $10.4bn | n.a. | n.a. |
| Q3 2020 | 26 | $10.9bn | n.a. | n.a. |
| Q4 2020 | 30 | $10.7bn | n.a. | n.a. |
| Q1 2021 | 32 | $12.0bn | n.a. | n.a. |
| Q2 2021 | 34 | $13.2bn | n.a. | n.a. |
| Q3 2021 | 27 | $13.3bn | n.a. | n.a. |
| Q4 2021 | 31 | $14.0bn | n.a. | n.a. |
| Q1 2022 | 23 | $15.7bn | n.a. | n.a. |
| Q2 2022 | 32 | $12.5bn | n.a. | n.a. |
| Q3 2022 | 24 | $11.7bn | n.a. | n.a. |
| Q4 2022 | 27 | $12.4bn | n.a. | n.a. |
| Q1 2023 | 23 | $12.4bn | n.a. | n.a. |
| Q2 2023 | 17 | $13.8bn | n.a. | n.a. |
| Q3 2023 | 21 | $12.3bn | n.a. | n.a. |
| Q4 2023 | 24 | $10.0bn | 15 | 9 |
| Q1 2024 | 23 | $11.2bn | 9 | 14 |
| Q2 2024 | 21 | $11.0bn | 13 | 7 |
| Q3 2024 | 25 | $13.5bn | 15 | 8 |
| Q4 2024 | 24 | $14.1bn | 13 | 11 |
| Q1 2025 | 24 | $15.9bn | 16 | 9 |
| Q2 2025 | 24 | $15.0bn | 17 | 8 |
| Q3 2025 | 30 | $16.0bn | 17 | 12 |
| Q4 2025 | 25 | $16.1bn | 17 | 25 |
| Q1 2026 | 23 | $14.0bn | 26 | 19 |
| Q2 2026 | 24 | $15.0bn | 20 | 22 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
AON and V →AON and AXP →AON and BAC →Choose a stock to compare with AON →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own AON, latest filings →Back to the 13F Explorer →