SEC Form 4 · Updated Daily
AON
— AON PUBLIC LIMITED COMPANY OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| RYAN PATRICK G | Director · Officer | 8,397,000 | 2008-03-17 | M |
| FRADIN RUSSELL P | Director | 411,611 | 2010-11-02 | M |
| McGill Stephen P | Director | 252,071 | 2016-08-02 | S |
| Davies Christa | Director | 207,257.59 | 2024-02-15 | A |
| Besio Gregory J | Officer | 192,239.35 | 2015-02-19 | M |
| Andersen Eric | Officer | 189,440.2 | 2025-02-13 | A |
| Case Gregory C | Director · Officer | 175,170 | 2026-02-19 | G |
| Rice Michael D | Officer | 172,195 | 2006-09-15 | M |
| Appel Andrew M | Officer | 164,872 | 2010-11-10 | S |
| KNIGHT LESTER B | Director | 163,000 | 2026-09-02 | P |
| Savacool Kristi A | Director | 155,551 | 2017-02-16 | A |
| O'Connor Michael J | Officer | 147,917.65 | 2020-02-18 | S |
| RAVIN RICHARD M | Officer | 139,875 | 2007-05-29 | M |
| COLE DAVID L | Officer | 136,378 | 2006-03-20 | M |
| BUNGERT MICHAEL G | Officer | 116,621 | 2007-01-02 | M |
| Devine Ted T | Officer | 110,556 | 2009-08-21 | M |
| VERBEEK DIRK PIETER | Officer | 100,271 | 2006-03-17 | M |
| BRUNO JOHN G | Director | 86,690.65 | 2021-02-11 | A |
| JANNOTTA EDGAR D | Director | 84,655 | 2014-06-24 | A |
| FARMER JEREMY G O | Officer | 68,087 | 2011-05-01 | M |
| Fung Bernard S | Officer | 68,043 | 2010-03-15 | M |
| FINDLAY D CAMERON | Officer | 67,751 | 2009-03-17 | M |
| CONWAY MICHAEL A | Officer | 64,733 | 2006-08-18 | M |
| Grace Caroline | Director · Officer | 59,752.96 | 2019-02-14 | A |
| MORRISON ROBERT S | Director | 56,109.9 | 2017-06-23 | A |
| BOLGER DAVID P | Officer | 55,418 | 2008-03-18 | M |
| Weitz Andy | Officer | 44,201.27 | 2024-02-15 | A |
| Clement Philip | Officer | 43,353 | 2013-02-25 | M |
| Zern John | Officer | 38,528 | 2019-08-21 | M |
| Goland Anthony R | Officer | 36,847 | 2021-02-11 | A |
| Hayley Kathryn | Director | 31,528 | 2010-06-14 | M |
| Conti Fulvio | Director | 31,226 | 2024-06-20 | A |
| ROGERS JOHN W JR | Director | 30,596.63 | 2012-04-12 | M |
| FRANCIS CHERYL A | Director | 29,479.97 | 2026-06-25 | A |
| NOTEBAERT RICHARD C | Director | 28,513.97 | 2026-06-25 | A |
| MYERS RICHARD B | Director | 27,618 | 2021-06-25 | A |
| WOO CAROLYN Y | Director | 27,455 | 2023-06-15 | A |
| Stevens Lisa | Officer | 26,321.491 | 2026-02-18 | G |
| SANTONA GLORIA | Director | 22,647.97 | 2026-06-25 | A |
| MCKENNA ANDREW J | Reporting Owner | 22,596 | 2012-03-28 | G |
| MAHONEY DENNIS L | Officer | 16,176 | 2007-03-17 | M |
| Levin Matthew | Officer | 14,706 | 2013-08-01 | M |
| MARTIN R EDEN | Director | 14,090.55 | 2012-04-12 | M |
| CAMPBELL JEFFREY C | Director | 12,806.97 | 2026-06-25 | A |
| Zeidel Darren | Officer | 12,704.099 | 2026-07-28 | S |
| Meissner Laurel G. | Officer | 12,314 | 2018-02-20 | S |
| Harmer Peter | Officer | 12,258 | 2009-08-05 | S |
| Marcell Andy | Officer | 9,149.356 | 2026-03-13 | M |
| Simon Mindy F. | Officer | 8,729.421 | 2026-02-12 | A |
| Cai Jin-Yong | Director | 8,241.376 | 2026-06-25 | A |
| Neller Michael | Officer | 8,233.7 | 2025-03-14 | M |
| Hunger Daniel F | Officer | 7,814 | 2008-03-17 | M |
| KALFF JAN | Director | 7,042 | 2011-06-01 | M |
| Goltermann Lori | Officer | 6,921.594 | 2026-03-13 | M |
| Spruell Byron | Director | 6,562.97 | 2026-06-25 | A |
| Reese Edmund | Officer | 6,099.081 | 2026-07-01 | M |
| Leng James W | Director | 5,190 | 2016-06-24 | A |
| Platt James | Officer | 4,738 | 2022-03-15 | M |
| LIEB PETER M | Officer | 4,407.99 | 2019-05-31 | S |
| Corona Anne | Officer | 4,271.871 | 2026-03-13 | M |
| Legris Yvan | Officer | 3,477 | 2013-03-15 | M |
| Aigotti Diane | Director | 3,345 | 2008-03-17 | M |
| Karaboutis Adriana | Director | 2,791.97 | 2026-06-25 | A |
| GREEN JUDSON C | Director | 2,306 | 2010-10-01 | A |
| SMITH SARAH G | Director | 2,299.97 | 2026-06-25 | A |
| Slyfield Jillian | Officer | 1,943.02 | 2024-09-17 | M |
| Alvarez Jose Antonio | Director | 1,642.86 | 2026-06-25 | A |
| STAVRIDIS JAMES G. | Director | 1,563.654 | 2026-06-25 | A |
| Jenkins Jo Ann | Director | 1,060.447 | 2026-06-25 | A |
| Virani Nadin | Officer | 1,014.48 | 2026-08-17 | — |
| Dail Baljit | Officer | 860 | 2011-05-16 | — |
| LOSH J MICHAEL | Director | 771 | 2022-06-17 | A |
| DEBRUNNER DAVID J | Officer | 0 | 2025-09-15 | — |
| OHALLERAN MICHAEL D | Reporting Owner | 0 | 2007-05-30 | S |
| Wendt Douglas R | Officer | 0 | 2007-07-20 | — |
| Hendriks Roelof | Officer | 0 | 2007-01-19 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-02 | KNIGHT LESTER B | Open-market buy | 367 | $330.51 | 163,000 |
| 2026-09-02 | KNIGHT LESTER B | Open-market buy | 1,440 | $329.69 | 162,633 |
| 2026-09-02 | KNIGHT LESTER B | Open-market buy | 4,145 | $328.34 | 161,193 |
| 2026-09-02 | KNIGHT LESTER B | Open-market buy | 7,212 | $327.52 | 157,048 |
| 2026-09-02 | KNIGHT LESTER B | Open-market buy | 5,097 | $326.53 | 149,836 |
| 2026-09-02 | KNIGHT LESTER B | Open-market buy | 1,739 | $325.63 | 144,739 |
| 2026-08-17 | Virani Nadin | — | — | — | 1,014.48 |
| 2026-07-28 | Zeidel Darren | Open-market sale | 475 | $380.00 | 11,504.099 |
| 2026-07-28 | Zeidel Darren | Open-market sale | 725 | $378.00 | 11,979.099 |
| 2026-07-28 | Zeidel Darren | Open-market sale | 700 | $376.00 | 12,704.099 |
| 2026-07-17 | Zeidel Darren | Open-market sale | 675 | $374.00 | 13,404.099 |
| 2026-07-17 | Zeidel Darren | Open-market sale | 650 | $372.00 | 14,079.099 |
| 2026-07-17 | Zeidel Darren | Open-market sale | 625 | $370.00 | 14,729.099 |
| 2026-07-07 | Zeidel Darren | Open-market sale | 600 | $360.00 | 15,354.099 |
| 2026-07-01 | Reese Edmund | Option exercise (derivative) | 3,975 | $0.00 | 3,975 |
| 2026-07-01 | Reese Edmund | Tax withholding | 2,198.112 | $343.56 | 3,900.969 |
| 2026-07-01 | Reese Edmund | Option exercise | 3,975 | — | 6,099.081 |
| 2026-06-25 | Karaboutis Adriana | Tax withholding | 186.235 | $315.95 | 2,605.735 |
| 2026-06-25 | Karaboutis Adriana | Grant / award | 776 | — | 2,791.97 |
| 2026-06-25 | Jenkins Jo Ann | Tax withholding | 186.235 | $315.95 | 874.212 |
| 2026-06-25 | Jenkins Jo Ann | Grant / award | 776 | — | 1,060.447 |
| 2026-06-25 | SMITH SARAH G | Tax withholding | 186.235 | $315.95 | 2,113.735 |
| 2026-06-25 | SMITH SARAH G | Grant / award | 776 | — | 2,299.97 |
| 2026-06-25 | Cai Jin-Yong | Tax withholding | 396.524 | $315.95 | 7,844.852 |
| 2026-06-25 | Cai Jin-Yong | Grant / award | 776 | — | 8,241.376 |
| 2026-06-25 | Spruell Byron | Tax withholding | 186.235 | $315.95 | 6,376.735 |
| 2026-06-25 | Spruell Byron | Grant / award | 776 | — | 6,562.97 |
| 2026-06-25 | CAMPBELL JEFFREY C | Tax withholding | 186.235 | $315.95 | 12,620.735 |
| 2026-06-25 | CAMPBELL JEFFREY C | Grant / award | 776 | — | 12,806.97 |
| 2026-06-25 | SANTONA GLORIA | Tax withholding | 186.235 | $315.95 | 22,461.735 |
| 2026-06-25 | SANTONA GLORIA | Grant / award | 776 | — | 22,647.97 |
| 2026-06-25 | NOTEBAERT RICHARD C | Tax withholding | 186.235 | $315.95 | 28,327.735 |
| 2026-06-25 | NOTEBAERT RICHARD C | Grant / award | 776 | — | 28,513.97 |
| 2026-06-25 | STAVRIDIS JAMES G. | Tax withholding | 186.235 | $315.95 | 1,377.419 |
| 2026-06-25 | STAVRIDIS JAMES G. | Grant / award | 776 | — | 1,563.654 |
| 2026-06-25 | FRANCIS CHERYL A | Tax withholding | 186.235 | $315.95 | 29,293.735 |
| 2026-06-25 | FRANCIS CHERYL A | Grant / award | 776 | — | 29,479.97 |
| 2026-06-25 | Alvarez Jose Antonio | Tax withholding | 372.469 | $315.95 | 1,270.391 |
| 2026-06-25 | Alvarez Jose Antonio | Grant / award | 776 | — | 1,642.86 |
| 2026-06-25 | KNIGHT LESTER B | Grant / award | 1,488 | — | 5,227 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.