Aon's three largest insider shareholders as of September 29, 2026 are Gregory C Case (President Ceo, 933.71K shares), Eric Andersen (President, 177.03K shares), Gregory C Case (President Ceo, 175.17K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Eric Andersen | President | 177,033 | 0 | 177,033 | 18.1% | 18 Feb, 2025 |
| 2 | Gregory C Case | President Ceo | 0 | 175,169 | 175,169 | 18.0% | 20 Feb, 2026 |
| 3 | Lester B Knight | Director | 0 | 163,000 | 163,000 | 16.7% | 03 Sep, 2026 |
| 4 | Christa Davies | Chief Financial Officer | 161,706 | 0 | 161,706 | 16.6% | 20 Feb, 2024 |
| 5 | Andy Weitz | Chief Marketing Officer | 41,524 | 0 | 41,524 | 4.3% | 20 Feb, 2024 |
| 6 | Fulvio Conti | Director | 30,862 | 0 | 30,862 | 3.2% | 24 Jun, 2024 |
| 7 | Cheryl A Francis | Director | 29,294 | 0 | 29,294 | 3.0% | 29 Jun, 2026 |
| 8 | Richard C Notebaert | Director | 28,328 | 0 | 28,328 | 2.9% | 29 Jun, 2026 |
| 9 | Carolyn Y Woo | Director | 27,278 | 0 | 27,278 | 2.8% | 20 Jun, 2023 |
| 10 | Lisa Stevens | Chief Administrative Officer | 26,321 | 0 | 26,321 | 2.7% | 19 Feb, 2026 |
| 11 | Gloria Santona | Director | 22,462 | 0 | 22,462 | 2.3% | 29 Jun, 2026 |
| 12 | Jeffrey C Campbell | Director | 12,621 | 0 | 12,621 | 1.3% | 29 Jun, 2026 |
| 13 | Darren Zeidel | General Counsel | 11,504 | 0 | 11,504 | 1.2% | 30 Jul, 2026 |
| 14 | Andy Marcell | Global Ceo, Solution Lines | 8,820 | 0 | 8,820 | 0.9% | 17 Mar, 2026 |
| 15 | Michael Neller | Principal Accounting Officer | 8,209 | 0 | 8,209 | 0.8% | 25 Mar, 2025 |
| 16 | Jin-Yong Cai | Director | 7,845 | 0 | 7,845 | 0.8% | 29 Jun, 2026 |
| 17 | Lori Goltermann | Ceo, Regions North America | 6,795 | 0 | 6,795 | 0.7% | 17 Mar, 2026 |
| 18 | Mindy F. Simon | Chief Operating Officer | 6,496 | 0 | 6,496 | 0.7% | 17 Feb, 2026 |
| 19 | Byron Spruell | Director | 6,377 | 0 | 6,377 | 0.7% | 29 Jun, 2026 |
| 20 | James Platt | Chief Operating Officer | 4,590 | 0 | 4,590 | 0.5% | 17 Mar, 2022 |
| 21 | Anne Corona | Chief Commercial Officer | 4,195 | 0 | 4,195 | 0.4% | 17 Mar, 2026 |
| 22 | Edmund Reese | Chief Financial Officer | 3,901 | 0 | 3,901 | 0.4% | 06 Jul, 2026 |
| 23 | Adriana Karaboutis | Director | 2,606 | 0 | 2,606 | 0.3% | 29 Jun, 2026 |
| 24 | Sarah G Smith | Director | 2,114 | 0 | 2,114 | 0.2% | 29 Jun, 2026 |
| 25 | Jillian Slyfield | Chief Innovation Officer | 1,910 | 0 | 1,910 | 0.2% | 19 Sep, 2024 |
| 26 | James G. Stavridis | Director | 1,681 | 0 | 1,681 | 0.2% | 29 Jun, 2026 |
| 27 | Jose Antonio Alvarez | Director | 1,270 | 0 | 1,270 | 0.1% | 29 Jun, 2026 |
| 28 | Jo Ann Jenkins | Director | 874 | 0 | 874 | 0.1% | 29 Jun, 2026 |
| 29 | J Michael Losh | Director | 771 | 0 | 771 | 0.1% | 22 Jun, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Sep, 2026 | Lester B Knight | Director | Acquired P | 1,739 | $325.63 | $566.27K | 144,739 | Indirect |
| 02 Sep, 2026 | Lester B Knight | Director | Acquired P | 5,097 | $326.53 | $1.66Mn | 149,836 | Indirect |
| 02 Sep, 2026 | Lester B Knight | Director | Acquired P | 7,212 | $327.52 | $2.36Mn | 157,048 | Indirect |
| 02 Sep, 2026 | Lester B Knight | Director | Acquired P | 4,145 | $328.34 | $1.36Mn | 161,193 | Indirect |
| 02 Sep, 2026 | Lester B Knight | Director | Acquired P | 1,440 | $329.69 | $474.75K | 162,633 | Indirect |
| 02 Sep, 2026 | Lester B Knight | Director | Acquired P | 367 | $330.51 | $121.30K | 163,000 | Indirect |
| 28 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 700 | $376.00 | $263.20K | 12,704 | Direct |
| 28 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 725 | $378.00 | $274.05K | 11,979 | Direct |
| 28 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 475 | $380.00 | $180.50K | 11,504 | Direct |
| 17 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 625 | $370.00 | $231.25K | 14,729 | Direct |
| 17 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 650 | $372.00 | $241.80K | 14,079 | Direct |
| 17 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 675 | $374.00 | $252.45K | 13,404 | Direct |
| 07 Jul, 2026 | Darren Zeidel | General Counsel | Disposed S | 600 | $360.00 | $216.00K | 15,354 | Direct |
| 01 Jul, 2026 | Edmund Reese | Chief Financial Officer | Acquired M | 3,975 | — | — | 6,099 | Direct |
| 01 Jul, 2026 | Edmund Reese | Chief Financial Officer | Disposed F | 2,198 | $343.56 | $755.18K | 3,901 | Direct |
| 01 Jul, 2026 | Edmund Reese | Chief Financial Officer | Disposed M | 3,975 | $0.00 | $0 | 3,975 | Direct |
| 25 Jun, 2026 | Jeffrey C Campbell | Director | Acquired A | 776 | — | — | 12,807 | Direct |
| 25 Jun, 2026 | Jose Antonio Alvarez | Director | Acquired A | 776 | — | — | 1,643 | Direct |
| 25 Jun, 2026 | Jo Ann Jenkins | Director | Acquired A | 776 | — | — | 1,060 | Direct |
| 25 Jun, 2026 | Lester B Knight | Director | Acquired A | 1,488 | — | — | 5,227 | Direct |