Aon plc
AON- Exchange
- NYSE
- Industry
- Insurance Agents, Brokers & Service
- SEC CIK
- 0000315293
In the last 90 days, Aon plc insiders filed 1 open-market purchase and 3 sales; 1,266 institutions reported holding it in 13F filings for Q2 2026, worth $65.8B in total; 4 superinvestors hold it, including Viking Global Investors and Baupost Group.
Key figures
- Insider buysLast 90 days, $6.55M in total
- 1
- Insider sellsLast 90 days, $1.66M in total
- 3
- 13F holdersQ2 2026, +26 vs. previous quarter
- 1,266
- 13F valueReported value at the end of Q2 2026
- $65.8B
- Superinvestors holdingAt the end of Q2 2026
- 4
Price chart
Superinvestors holding AON, Q2 2026
4 superinvestors report holding Aon plc on Form 13F. Percentages are the stock's share of each portfolio.
Viking Global Investors
Andreas Halvorsen
1.1%
Aon plc's share of the portfolio
- Shares
- 1,151,269
- Value
- $381.9M
| Superinvestor | Weight | Value |
|---|---|---|
| Weitz Investment Management | 4.9% | $70.9M |
| Markel Group | 0.3% | $45.0M |
Latest insider trades
Open-market purchases and sales by Aon plc insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 3, 2026 (view filing)8:33 PM ET | Sep 2 | 1 day | Knight Lester BDirector | PPurchaseClass A Ordinary Stock | +20.0K | $327.48 | +$6.55M | +14.0%163.0K after | 6 lots |
| Jul 30, 2026 (view filing)5:23 PM ET | Jul 28 | 2 days | Zeidel DarrenGeneral Counsel | SSaleClass A Ordinary Stock | −1.90K | $377.76 | −$717.8K | −14.2%11.5K after | 3 lots10b5-1 |
| Jul 21, 2026 (view filing)4:13 PM ET | Jul 17 | 4 days | Zeidel DarrenGeneral Counsel | SSaleClass A Ordinary Stock | −1.95K | $372.05 | −$725.5K | −12.7%13.4K after | 3 lots10b5-1 |
| Jul 9, 2026 (view filing)5:48 PM ET | Jul 7 | 2 days | Zeidel DarrenGeneral Counsel | SSaleClass A Ordinary Stock | −600 | $360.00 | −$216.0K | −3.8%15.4K after | 10b5-1 |
| Mar 2, 2026 (view filing) | Feb 26 | 4 days | Zeidel DarrenGeneral Counsel | SSaleClass A Ordinary Stock | −4.30K | $329.72 | −$1.42M | −21.2%16.0K after | |
| Feb 19, 2026 (view filing) | Feb 17 | 2 days | Zeidel DarrenGeneral Counsel | SSaleClass A Ordinary Stock | −5.04K | $325.79 | −$1.64M | −19.9%20.3K after | 10b5-1 |
| Feb 12, 2026 (view filing) | Feb 10 | 2 days | Knight Lester BDirector | PPurchaseClass A Ordinary Stock | +4.00K | $319.24 | +$1.28M | +2.9%143.0K after | |
| Nov 7, 2025 (view filing) | Nov 5 | 2 days | Zeidel DarrenGeneral Counsel | SSaleClass A Ordinary Stock | −8.80K | $344.52 | −$3.03M | −30.3%20.3K after | 2 lots |
| Dec 2, 2024 (view filing) | Nov 27 | 5 days | Simon Mindy F.Chief Operating Officer | SSaleClass A Ordinary Stock | −650 | $394.34 | −$256.3K | −26.4%1.82K after | |
| Nov 29, 2024 (view filing) | Nov 26 | 3 days | Stevens LisaChief Administrative Officer | SSaleClass A Ordinary Stock | −1.27K | $387.68 | −$494.3K | −13.6%8.08K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in Aon plc at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15,716,429 | $5.21B | 0.08% | −432,078−2.7% | Reduced |
| Vanguard Capital Management LLC | 13,603,465 | $4.51B | 0.10% | +21,709+0.2% | Added |
| JPMorgan Chase & Co | 12,175,974 | $3.99B | 0.23% | +6,534,543+115.8% | Added |
| Capital World Investors | 11,711,650 | $3.88B | 0.46% | +233,862+2.0% | Added |
| State Street Corp | 9,416,039 | $3.12B | 0.09% | +196,266+2.1% | Added |
| Dodge & Cox | 8,593,144 | $2.85B | 1.49% | +477,049+5.9% | Added |
| Massachusetts Financial Services Co | 7,615,397 | $2.58B | 0.82% | −742,700−8.9% | Reduced |
| Vanguard Portfolio Management LLC | 7,202,991 | $2.39B | 0.11% | +2,643,956+58.0% | Added |
| Morgan Stanley | 6,214,787 | $2.06B | 0.11% | −160,158−2.5% | Reduced |
| Banque Cantonale Vaudoise | 5,550 | $1.84B | 0.25% | +1,231+28.5% | Added |