AON
Aon plc · Finance & Insurance · Market cap $62.4B
Insiders bought $4.9M net in the last 90 days ·1 seller, 1 buyer· 3 of 3 sales under Rule 10b5-1 plans· latest Form 4 filed Sep 4, 2026
Insider Buying
$7.8M
reported purchases (SEC code P)
Insider Selling
$7.8M
reported sales (SEC code S)
Unique Insiders
2
in the rolling window
Latest filing
Sep 4, 2026
KNIGHT LESTER B
Aon plc (AON) has 42 SEC Form 4 filings (108 transaction rows) in the rolling window, disclosed by 2 distinct insiders. Most recent filing: Sep 4, 2026.
Inside the rolling window, 2 insiders at Aon plc reported 2 open-market purchases totaling $7.8M and 6 open-market sales totaling $7.8M. The most active filer is General Counsel Zeidel Darren with 6 filings. Insiders have net bought $4.9M over the trailing 6 months. The largest single insider purchase in this window was $6.5M by Director KNIGHT LESTER B on Sep 2, 2026.
- Industry:Insurance - Brokers
- CEO:Gregory C. Case
- Employees:60,000
- HQ:Dublin, DU, IE
- IPO:1980-06-01
| Source | |||||||
|---|---|---|---|---|---|---|---|
KNIGHT LESTER BFirst in 7 months | Director | Purchase | 20,000 | $6.5M | Sep 4 | -8.9% | SEC ↗ |
| General Counsel | Sale | 1,900 | $718K | Jul 30 | -19.7% | SEC ↗ | |
| General Counsel | Sale | 1,950 | $726K | Jul 21 | -18.1% | SEC ↗ | |
Zeidel DarrenFirst in 4 months | General Counsel | Sale | 600 | $216K | Jul 9 | — | SEC ↗ |
| General Counsel | Sale | 4,300 | $1.4M | Mar 2 | — | SEC ↗ | |
Zeidel DarrenFirst in 3 months | General Counsel | Sale | 5,040 | $1.6M | Feb 19 | — | SEC ↗ |
KNIGHT LESTER BFirst filing | Director | Purchase | 4,000 | $1.3M | Feb 12 | — | SEC ↗ |
Zeidel DarrenFirst filing | General Counsel | Sale | 8,800 | $3.0M | Nov 7 | — | SEC ↗ |
Earnings: last 7 quarters
Congress trading AON 137 all-time
- RRep. Michael McCaulSale$15,001 - $50,0002026-04-06
- RRep. Michael T. McCaulSale$15,001 - $50,0002026-04-06
- RRep. Michael T. McCaulSale$15,001 - $50,0002026-03-25
- RRep. Michael T. McCaulSale$15,001 - $50,0002026-03-12
- RRep. Michael T. McCaulSale$15,001 - $50,0002026-03-04
- DRep. Ro KhannaSale$1,001 - $15,0002026-01-29
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does AON have?
Aon plc (AON) has 42 SEC Form 4 filings (108 transaction rows) in the rolling 365-day window, disclosed by 2 distinct insiders. Most recent filing: Sep 4, 2026.
When was the most recent SEC Form 4 filing for AON?
The most recent Form 4 filing for AON on Tracefour is dated Sep 4, 2026.
Who is the most active insider at AON?
The most active SEC Form 4 filer at AON in the rolling window is General Counsel Zeidel Darren, with 6 filings.
What is the net insider flow at AON over the last 6 months?
Over the trailing 180 days, insiders at AON have net bought $4.9M based on SEC Form 4 disclosures.
What was the largest insider purchase at AON?
The largest single insider open-market purchase at AON in the rolling window was $6.5M by Director KNIGHT LESTER B on 2026-09-02.
What is the total insider buy and sell value at AON in the current window?
Inside the rolling window, insiders at AON bought $7.8M and sold $7.8M based on SEC Form 4 filings.
Can I get alerts for AON insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Aon plc (AON). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Aon plc is in the Finance & Insurance sector.