Aon PLC (AON)
Who owns Aon PLC (AON)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.8% of the shares are freely tradable; institutional investors hold 92.0%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 9.44 | 20,171,049 | +1.0 | 12/31/2025 |
| BlackRock Inc | 7.56 | 16,148,507 | -0.5 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.36 | 13,581,756 | +0.0 | 03/31/2026 |
| Capital World Investors | 5.37 | 11,477,788 | -6.3 | 03/31/2026 |
| State Street Corp | 4.32 | 9,219,773 | +0.2 | 03/31/2026 |
| Massachusetts Financial Services Company | 3.91 | 8,358,097 | -2.2 | 03/31/2026 |
| Dodge & Cox | 3.80 | 8,116,095 | +3.4 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 2.98 | 6,374,945 | +14.4 | 03/31/2026 |
| JPMorgan Chase & Co | 2.64 | 5,641,431 | +76.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.04 | 6,487,642 | +0.3 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 28. Jul 2026 | Zeidel Darren | General Counsel | Sell | 475 | 380.00 | 180,500 |
| 28. Jul 2026 | Zeidel Darren | General Counsel | Sell | 725 | 378.00 | 274,050 |
| 28. Jul 2026 | Zeidel Darren | General Counsel | Sell | 700 | 376.00 | 263,200 |
| 17. Jul 2026 | Zeidel Darren | General Counsel | Sell | 675 | 374.00 | 252,450 |
| 17. Jul 2026 | Zeidel Darren | General Counsel | Sell | 650 | 372.00 | 241,800 |
| 17. Jul 2026 | Zeidel Darren | General Counsel | Sell | 625 | 370.00 | 231,250 |
| 7. Jul 2026 | Zeidel Darren | General Counsel | Sell | 600 | 360.00 | 216,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.