Tom Gayner's AON Position Overview
Tom Gayner (via Markel Group Inc.) currently holds 134,050 shares of Aon plc (AON) worth $47.3 M, representing 0.38% of the portfolio. First purchased in 2020-Q4, this long-term strategic position has been held for 21 quarters.
Based on 13F filings, Tom Gayner has maintained a strategic position in AON, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2022, adding 6,850 shares.
Analysis based on 13F filings available since 2013 Q2
Tom Gayner's Aon plc (AON) Holding Value Over Time
Track share changes against reported price movement
Quarterly Aon plc (AON) Trades by Tom Gayner
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +4,250 | Add 3.27% | 134,050 | $352.88 |
| Q2 2025 | +350 | Add 0.27% | 129,800 | $356.76 |
| Q1 2025 | +3,250 | Add 2.58% | 129,450 | $399.09 |
| Q4 2024 | +6,050 | Add 5.04% | 126,200 | $359.16 |
| Q3 2024 | +6,200 | Add 5.44% | 120,150 | $345.99 |
| Q2 2024 | +3,900 | Add 3.54% | 113,950 | $293.58 |
| Q1 2024 | +4,700 | Add 4.46% | 110,050 | $333.72 |
| Q4 2023 | +5,800 | Add 5.83% | 105,350 | $291.02 |
| Q3 2023 | +6,500 | Add 6.99% | 99,550 | $324.22 |
| Q2 2023 | +6,500 | Add 7.51% | 93,050 | $345.20 |
| Q1 2023 | +6,500 | Add 8.12% | 86,550 | $315.29 |
| Q4 2022 | +6,000 | Add 8.10% | 80,050 | $300.14 |
| Q3 2022 | +5,050 | Add 7.32% | 74,050 | $267.87 |
| Q2 2022 | +4,050 | Add 6.24% | 69,000 | $269.68 |
| Q1 2022 | +6,850 | Add 11.79% | 64,950 | $325.64 |
| Q4 2021 | +6,500 | Add 12.60% | 58,100 | $300.57 |
| Q3 2021 | +6,700 | Add 14.92% | 51,600 | $285.78 |
| Q2 2021 | +3,400 | Add 8.19% | 44,900 | $238.75 |
| Q1 2021 | +4,500 | Add 12.16% | 41,500 | $230.12 |
| Q4 2020 | +37,000 | New Buy | 37,000 | $211.27 |
Tom Gayner's Aon plc Investment FAQs
Tom Gayner first purchased Aon plc (AON) in Q4 2020, acquiring 37,000 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner has held Aon plc (AON) for 21 quarters since Q4 2020.
Tom Gayner's largest addition to Aon plc (AON) was in Q4 2020, adding 37,000 shares worth $7.82 M.
According to the latest 13F filing for Q4 2025, Tom Gayner's firm, Markel Group Inc., owns 134,050 shares of Aon plc (AON), valued at approximately $47.3 M.
As of the Q4 2025 filing, Aon plc (AON) represents approximately 0.38% of Tom Gayner's publicly disclosed stock portfolio, making it one of their key holdings.
Tom Gayner's peak holding in Aon plc (AON) was 134,050 shares, as reported at the end of Q4 2025.