Aon
Brokers commercial insurance and reinsurance while advising employers on health, talent and retirement.
$355.40
After-hours close−0.04 (−0.01%)
At close$355.44(+1.68%)
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Breakdown13F · Form 4
Institutions 139.32%Insiders 0.00%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 212.13M · Float 209.97M · 99.0% free float
Institutions13F, as of Jun 30, 2026
1,283 holders · 295.52M shares · 140 new positions · 608 increased · 459 reduced · 139 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 15.72M | 7.41% | −432.1K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 13.60M | 6.41% | +21.7K | Aug 13, 2026 |
| JPMorgan Chase & Co | 12.18M | 5.74% | +6.53M | Aug 12, 2026 |
| Capital World Investors | 11.71M | 5.52% | +233.9K | Aug 12, 2026 |
| State Street Corp | 9.42M | 4.44% | +196.3K | Aug 7, 2026 |
| Dodge & Cox | 8.59M | 4.05% | +477.0K | Aug 13, 2026 |
| Massachusetts Financial Services Co /MA/ | 7.62M | 3.59% | −742.7K | Aug 3, 2026 |
| Vanguard Portfolio Management LLC | 7.20M | 3.40% | +2.64M | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Vanguard Capital Management | 7.32% | 15.69M | 13G | Apr 29, 2026 ↗ |
| JPMorgan Chase & Co | 5.60% | 12.17M | 13G | Jul 16, 2026 ↗ |
| Capital World Investors | 5.60% | 13G | Nov 13, 2024 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| James G. Stavridis | director | 1.4K | 0.00% | Jun 29, 2026 |
32 people have not refiled in the last 18 months (3.19M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jul 28, 2026 | Darren Zeidelofficer: General Counsel | Sale · 3 lots | 1,900 | $377.76 | 11,504 |
| Jul 17, 2026 | Darren Zeidelofficer: General Counsel | Sale · 3 lots | 1,950 | $372.05 | 13,404 |
| Jul 7, 2026 | Darren Zeidelofficer: General Counsel | Sale | 600 | $360.00 | 15,354 |
| Feb 26, 2026 | Darren Zeidelofficer: General Counsel | Sale | 4,300 | $329.72 | 15,954 |
| Feb 17, 2026 | Darren Zeidelofficer: General Counsel | Sale | 5,040 | $325.79 | 20,254 |
| Feb 10, 2026 | Lester B. Knightdirector | Purchase | 4,000 | $319.24 | 143,000 |
| Nov 5, 2025 | Darren Zeidelofficer: General Counsel | Sale · 2 lots | 8,800 | $344.52 | 20,253 |
CongressHouse and Senate disclosures
| Member | Type | Amount | Owner | Traded | Disclosed |
|---|---|---|---|---|---|
| Rep. Michael McCaul · TX10 | Sale | $15,001 – $50,000 | Spouse | Apr 6, 2026 | May 11, 2026 ↗ |
| Rep. Michael McCaul · TX10 | Sale | $15,001 – $50,000 | Spouse | Mar 25, 2026 | Apr 10, 2026 ↗ |
| Rep. Michael McCaul · TX10 | Sale | $15,001 – $50,000 | Spouse | Mar 12, 2026 | Apr 10, 2026 ↗ |
| Rep. Michael McCaul · TX10 | Sale | $15,001 – $50,000 | Spouse | Mar 4, 2026 | Apr 10, 2026 ↗ |