Warren Buffett's AON Position Overview
Warren Buffett (via Berkshire Hathaway INC) currently holds 4.1M shares of Aon plc (AON) worth $1.46 B, representing 0.55% of the portfolio. First purchased in 2021-Q1, this medium-term investment has been held for 19 quarters.
Based on 13F filings, Warren Buffett has maintained a strategic position in AON, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2021, adding 299.9K shares. Largest reduction occurred in Q3 2023, reducing 235.0K shares.
Analysis based on 13F filings available since 2013 Q2
Warren Buffett's Aon plc (AON) Holding Value Over Time
Track share changes against reported price movement
Quarterly Aon plc (AON) Trades by Warren Buffett
| Period | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2021 | +4.1 M | New Buy | 4.1 M | $230.11 |
| Q2 2021 | +299,854 | Add 7.32% | 4.4 M | $238.76 |
| Q1 2023 | -61,000 | Reduce 1.39% | 4.34 M | $315.29 |
| Q3 2023 | -235,000 | Reduce 5.42% | 4.1 M | $324.22 |
Warren Buffett's Aon plc Investment FAQs
Warren Buffett first purchased Aon plc (AON) in Q1 2021, acquiring 4,096,146 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Warren Buffett has held Aon plc (AON) for 19 quarters since Q1 2021. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Warren Buffett's largest addition to Aon plc (AON) was in Q1 2021, adding 4,096,146 shares worth $942.56 M. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
According to the latest 13F filing for Q3 2025, Warren Buffett's firm, Berkshire Hathaway INC, owns 4,100,000 shares of Aon plc (AON), valued at approximately $1.46 B. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
As of the Q3 2025 filing, Aon plc (AON) represents approximately 0.55% of Warren Buffett's publicly disclosed stock portfolio, making it one of their key holdings. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Warren Buffett's peak holding in Aon plc (AON) was 4,396,000 shares, as reported at the end of Q2 2021. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.