AON Aon plc
Aon plc (AON) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 43% planned / 57% discretionary
Largest single sale: $2.6M.
Where they traded
Last open-market purchase: September 2, 2026 , by KNIGHT LESTER B .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| KNIGHT LESTER B 6 fills | Director | Buy | 20,000 | $327.48 | $6.5M | 163,000 | |
| Zeidel Darren 3 fills | General Counsel | Sell 10b5-1 | 1,900 | $377.76 | $717.8K | 12,704 −13% of holding | |
| Zeidel Darren 3 fills | General Counsel | Sell 10b5-1 | 1,950 | $372.05 | $725.5K | 14,729 −11.7% of holding | |
| Zeidel Darren | General Counsel | Sell 10b5-1 | 600 | $360.00 | $216.0K | 15,354 −3.8% of holding | |
| Zeidel Darren | General Counsel | Sell | 4,300 | $329.72 | $1.4M | 15,954 −21.2% of holding | |
| Zeidel Darren | General Counsel | Sell 10b5-1 | 5,040 | $325.79 | $1.6M | 20,254 −19.9% of holding | |
| KNIGHT LESTER B | Director | Buy | 4,000 | $319.24 | $1.3M | 143,000 | |
| Zeidel Darren 2 fills | General Counsel | Sell | 8,800 | $344.52 | $3.0M | 21,483 −29.1% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.