Aon plc (AON) Shareholders & Insider Trades
Aon shareholders at a glance
The largest holder of Aon stock is Vanguard Capital Management LLC, with 13.6 million shares (6.41% of the company), worth about $4.37 billion as of September 25, 2026. The 10 largest holders together own 44.0%.
In Q2 2026, 1,306 institutional holdings reports listed shares worth $66.10 billion.
Insiders reported 59 transactions in the last two years: 5 sales worth $6.84 million and 1 purchase. The newest one on file is from March 13, 2026 (Goltermann Lori, Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through March 13, 2026.
Aon plc
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Aon shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Vanguard Capital Management LLC | 13.6 million | 6.41% | $4.4B |
| JPMorgan Investment Management, Inc. | 12.2 million | 5.74% | $3.9B |
| Capital Research & Management Co. (World Investors) | 11.7 million | 5.52% | $3.8B |
| BlackRock Advisors LLC | 11.5 million | 5.43% | $3.7B |
| State Street Corporation | 9.4 million | 4.44% | $3.0B |
| Dodge & Cox | 8.6 million | 4.05% | $2.8B |
| MFS Investment Management Canada Ltd. | 7.6 million | 3.59% | $2.4B |
| Vanguard Portfolio Management LLC | 7.2 million | 3.40% | $2.3B |
| Eaton Vance Management | 6.2 million | 2.93% | $2.0B |
| Geode Capital Management LLC | 5.2 million | 2.44% | $1.7B |
As of September 25, 2026.
Aon institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,306 | – | $66.1B |
| Q1 2026 | 1,295 | 188.0 million | $60.6B |
| Q4 2025 | 1,322 | 189.0 million | $66.8B |
| Q3 2025 | 1,302 | 190.0 million | $67.6B |
| Q2 2025 | 1,283 | 195.0 million | $69.5B |
| Q1 2025 | 1,330 | 194.0 million | $77.3B |
| Q4 2024 | 1,258 | 196.0 million | $70.1B |
| Q3 2024 | 1,202 | 196.0 million | $68.0B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Aon insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Goltermann Lori | Mar 13, 2026 | Officer | -- | – |
| Marcell Andy | Mar 13, 2026 | Officer | -- | – |
| Corona Anne | Mar 13, 2026 | Officer | -- | – |
| Zeidel Darren | Feb 26, 2026 | General Counsel | Sale at price 329.72 per share. | $1.4M |
| Case Gregory C | Feb 19, 2026 | Chief Executive Officer | Stock Gift at price 0.00 per share. | – |
| Stevens Lisa | Feb 18, 2026 | Officer | Stock Gift at price 0.00 per share. | – |
| Case Gregory C | Feb 17, 2026 | Chief Executive Officer | Stock Gift at price 0.00 per share. | – |
| Zeidel Darren | Feb 17, 2026 | General Counsel | Sale at price 325.79 per share. | $1.6M |
| Case Gregory C | Feb 17, 2026 | Chief Executive Officer | -- | – |
| Stevens Lisa | Feb 13, 2026 | Officer | -- | – |
| Reese Edmund | Feb 13, 2026 | Chief Financial Officer | -- | – |
| Simon Mindy F | Feb 13, 2026 | Chief Operating Officer | -- | – |
Newest 12 of 59 insider transactions in the last two years.
Questions and answers
Who owns the most Aon stock?
Vanguard Capital Management LLC, with 6.41% of the company (as of September 25, 2026). Next: JPMorgan Investment Management, Inc. (5.74%) and Capital Research & Management Co. (World Investors) (5.52%).
How many institutions own Aon stock?
1,306 institutional holdings reports listed Aon shares in Q2 2026 worth $66.10 billion.
Are Aon insiders buying or selling the stock?
In the last two years insiders reported 5 sales and 1 purchase (59 transactions in all); the newest on file is from March 13, 2026.
