Aon plc (AON) ownership: Top institutional holder: VANGUARD GROUP INC ($7.12B). Insider activity: Net Seller (6 buys, 14 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 20171049.00 | $7.12B | 2025-12-31 |
| BlackRock, Inc. | 16148507.00 | $5.21B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 13581756.00 | $4.38B | 2026-03-31 |
| Capital World Investors | 11477788.00 | $3.70B | 2026-03-31 |
| STATE STREET CORP | 9219773.00 | $2.98B | 2026-03-31 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 8358097.00 | $2.75B | 2026-03-31 |
| Dodge & Cox | 8116095.00 | $2.62B | 2026-03-31 |
| MORGAN STANLEY | 6374945.00 | $2.06B | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-03-13 | |
| Sell | null | 2026-03-13 | |
| Buy | null | 2026-03-13 | |
| Sell | null | 2026-03-13 | |
| Sell | null | 2026-03-13 | |
| Sell | null | 2026-03-13 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.