Company / CIK 0000315293
Aon plc
- Ticker
- AON
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 7
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- 4
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 2, 2026
Aon plc (AON) has 7 insiders on file who disclosed 25 transactions in the last 12 months (6 open-market buys, 12 sales, about $9.3M at reported prices), and 1 congressional trade in its stock is on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name, and 2 lobbying filings naming it as client report $490K in 2026.
Aon plc in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
8 people account for the disclosed buying and selling in Aon plc over the last 12 months; the most active is KNIGHT LESTER B with $6.5M.
Lobbying spend by quarter
How much has Aon plc reported spending on federal lobbying?
Aon plc reported $940K in lobbying over the last eight quarters, from filings matched by exact company name.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| STAVRIDIS JAMES G. | Director | 2 | 0 | 1 | October 1, 2026 |
| KNIGHT LESTER B | Director | 7 | 6 | 0 | September 3, 2026 |
| Zeidel Darren | General Counsel | 7 | 0 | 7 | July 30, 2026 |
| Reese Edmund | Chief Financial Officer | 3 | 0 | 1 | July 6, 2026 |
| Alvarez Jose Antonio | Director | 2 | 0 | 1 | June 29, 2026 |
| FRANCIS CHERYL A | Director | 2 | 0 | 1 | June 29, 2026 |
| NOTEBAERT RICHARD C | Director | 2 | 0 | 1 | June 29, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded AON
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the AON page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Alan Armstrong | Senator (OK), Republican | 1 | 1 | 0 | $1,001–$15K | March 27, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| KNIGHT LESTER B | AON | Buy P | September 2, 2026 | September 3, 2026 | 1d | 367 | $331 | $121K | indirect | Form 4 ↗ | |
| KNIGHT LESTER B | AON | Buy P | September 2, 2026 | September 3, 2026 | 1d | 1,440 | $330 | $475K | indirect | Form 4 ↗ | |
| KNIGHT LESTER B | AON | Buy P | September 2, 2026 | September 3, 2026 | 1d | 4,145 | $328 | $1.4M | indirect | Form 4 ↗ | |
| KNIGHT LESTER B | AON | Buy P | September 2, 2026 | September 3, 2026 | 1d | 7,212 | $328 | $2.4M | indirect | Form 4 ↗ | |
| KNIGHT LESTER B | AON | Buy P | September 2, 2026 | September 3, 2026 | 1d | 5,097 | $327 | $1.7M | indirect | Form 4 ↗ | |
| KNIGHT LESTER B | AON | Buy P | September 2, 2026 | September 3, 2026 | 1d | 1,739 | $326 | $566K | indirect | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 28, 2026 | July 30, 2026 | 2d | 475 | $380 | $181K | 10b5-1 plan | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 28, 2026 | July 30, 2026 | 2d | 725 | $378 | $274K | 10b5-1 plan | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 28, 2026 | July 30, 2026 | 2d | 700 | $376 | $263K | 10b5-1 plan | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 17, 2026 | July 21, 2026 | 4d | 675 | $374 | $252K | 10b5-1 plan | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 17, 2026 | July 21, 2026 | 4d | 650 | $372 | $242K | 10b5-1 plan | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 17, 2026 | July 21, 2026 | 4d | 625 | $370 | $231K | 10b5-1 plan | Form 4 ↗ | |
| Zeidel Darren | AON | Sell S | July 7, 2026 | July 9, 2026 | 2d | 600 | $360 | $216K | 10b5-1 plan | Form 4 ↗ | |
| Reese Edmund | AON | Option / conversion M | July 1, 2026 | July 6, 2026 | 5d | 3,975 | — | — | latederivative | Form 4 ↗ | |
| Reese Edmund | AON | Sell F | July 1, 2026 | July 6, 2026 | 5d | 2,198 | $344 | $755K | late | Form 4 ↗ | |
| Reese Edmund | AON | Option / conversion M | July 1, 2026 | July 6, 2026 | 5d | 3,975 | — | — | late | Form 4 ↗ | |
| NOTEBAERT RICHARD C | AON | Sell F | June 25, 2026 | June 29, 2026 | 4d | 186 | $316 | $59K | Form 4 ↗ | ||
| NOTEBAERT RICHARD C | AON | Other A | June 25, 2026 | June 29, 2026 | 4d | 776 | — | — | Form 4 ↗ | ||
| STAVRIDIS JAMES G. | AON | Sell F | June 25, 2026 | June 29, 2026 | 4d | 186 | $316 | $59K | Form 4 ↗ | ||
| STAVRIDIS JAMES G. | AON | Other A | June 25, 2026 | June 29, 2026 | 4d | 776 | — | — | Form 4 ↗ | ||
| FRANCIS CHERYL A | AON | Sell F | June 25, 2026 | June 29, 2026 | 4d | 186 | $316 | $59K | Form 4 ↗ | ||
| FRANCIS CHERYL A | AON | Other A | June 25, 2026 | June 29, 2026 | 4d | 776 | — | — | Form 4 ↗ | ||
| Alvarez Jose Antonio | AON | Sell F | June 25, 2026 | June 29, 2026 | 4d | 372 | $316 | $118K | Form 4 ↗ | ||
| Alvarez Jose Antonio | AON | Other A | June 25, 2026 | June 29, 2026 | 4d | 776 | — | — | Form 4 ↗ | ||
| KNIGHT LESTER B | AON | Other A | June 25, 2026 | June 29, 2026 | 4d | 1,488 | — | — | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "Aon plc". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
| Period | Registrant | Primary issue | Amount | Source |
|---|---|---|---|---|
| 2026 Q2 | AON CORPORATION | Insurance | $170,000 | LDA ↗ |
| 2026 Q1 | AON CORPORATION | Insurance | $320,000 | LDA ↗ |
| 2025 Q4 | AON CORPORATION | Insurance | $230,000 | LDA ↗ |
| 2025 Q3 | AON CORPORATION | Insurance | $220,000 | LDA ↗ |
Related companies
Companies whose stock was traded by the same people who traded AON, by number of filers in common. It shows overlap in public filings and nothing else.
- Fortinet, Inc. FTNT 2 filers in common
- Dell Technologies Inc. DELL 1 filer in common
- CrowdStrike Holdings, Inc. CRWD 1 filer in common
- Seagate Technology Holdings plc STX 1 filer in common
- Uber Technologies, Inc UBER 1 filer in common
- Datadog, Inc. DDOG 1 filer in common
- HERSHEY CO HSY 1 filer in common
- Arista Networks, Inc. ANET 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Lobbying disclosure reports Reports are due about 20 days after each quarter ends.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| Senate eFD, periodic transaction reports | 1 | 1 | July 21, 2026 | July 21, 2026 | Senate eFD search |
| SEC EDGAR, Form 4 | 10 | 25 | June 29, 2026 | September 3, 2026 | Form 4 list on EDGAR |
| Lobbying disclosure filings | 4 filings | — | — | — | LDA.gov search |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.