AON Aon plc: institutional ownership and insider trading
1,321 funds reported holding $74.7B of Aon plc in their latest 13F filings; in Q2 2026 funds net bought $1.73B, with 123 new positions and 115 funds selling out; over the last 12 months insiders bought $7.83M and sold $7.75M on the open market.
Famous investors holding AON
- Seth Klarman (Baupost Group): $228M, 4.2% of the portfolio
- Andreas Halvorsen (Viking Global Investors): $382M, 1.1% of the portfolio
- Tom Gayner (Markel Group): $45.0M, 0.3% of the portfolio
- Izzy Englander (Millennium Management): $114M, 0.0% of the portfolio
- Ray Dalio (Bridgewater Associates): $5.20M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $56.9M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $11.5M, 0.0% of the portfolio
- Two Sigma (Two Sigma Investments): $2.09M, 0.0% of the portfolio
Largest institutional holders of AON
- VANGUARD GROUP INC — $7.12B
- BlackRock, Inc. (BLK) — $5.21B
- VANGUARD CAPITAL MANAGEMENT LLC — $4.51B
- JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $3.99B
- Capital World Investors — $3.88B
- STATE STREET CORP (STT, STT-PG) — $3.12B
- DODGE & COX — $2.85B
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/ — $2.58B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $2.39B
- MORGAN STANLEY (MS, MS-PA, MS-PE, MS-PF, MS-PI, MS-PK, MS-PL, MS-PO, MS-PP, MS-PQ) — $2.06B
Recent AON insider trades
- Sep 2, 2026: Knight Lester B bought 20,000 shares ($6.55M)
- Jul 28, 2026: Zeidel Darren sold 1,900 shares ($718K)
- Jul 17, 2026: Zeidel Darren sold 1,950 shares ($726K)
- Jul 7, 2026: Zeidel Darren sold 600 shares ($216K)
Members of Congress trading AON
- May 27, 2025: Thomas H. Kean, Jr. bought $1.00K–$15.0K
- May 8, 2025: Jefferson Shreve sold $15.0K–$50.0K
- Mar 13, 2025: Jefferson Shreve bought $15.0K–$50.0K
- Jul 2, 2024: Kathy Manning sold part of $15.0K–$50.0K
- Jul 2, 2024: Kathy Manning sold part of $1.00K–$15.0K
- Jul 2, 2024: Kathy Manning sold part of $1.00K–$15.0K
- May 6, 2024: Thomas H. Kean, Jr. bought $1.00K–$15.0K
- Jan 23, 2024: Kathy Manning bought $1.00K–$15.0K
- Jan 23, 2024: Kathy Manning bought $1.00K–$15.0K
- Jan 23, 2024: Kathy Manning bought $1.00K–$15.0K
5%+ owners
- Vanguard Capital Management: 7.3% (Schedule 13G, filed Apr 29, 2026)
- JPMORGAN CHASE & CO.: 6.7% (Schedule 13G/A, filed Oct 16, 2026)
- JPMORGAN CHASE & CO: 5.6% (Schedule 13G, filed Jul 16, 2026)