| Ryan Patrick GExecutive Chairman, Director · 1574 transactions | — | 16.70M†as of Mar 2008 | 397.3K | — | 2.50M |
| Ryan Shirley WSpouse of Director and Officer · 5 transactions | — | 8.30Mas of Aug 2006 | — | — | — |
| Case Gregory CPresident & CEO, Director · 254 transactions | — | 2.21M† | 5.47M | — | 1.95M |
| McGill Stephen PChairman/CEO - ARS · 120 transactions | — | 402.1K†as of Aug 2016 | 1.07M | — | 419.0K |
| Fradin Russell PCEO/Chair - Aon Hewitt · 11 transactions | — | 334.1Kas of Nov 2010 | 929.0K | — | 788.7K |
| Knight Lester BDirector · 72 transactions | — | 328.6K† | 110.9K | 468.0K | — |
| Ohalleran Michael DSenior Exec VP · 58 transactions | — | 257.8K†as of Jun 2007 | 237.9K | — | 200.9K |
| Rice Michael DChairman - ARSA · 11 transactions | — | 225.6K†as of Feb 2007 | 42.4K | — | — |
| Besio Gregory JEVP/Chief HR Officer · 92 transactions | — | 192.2Kas of Feb 2015 | 432.4K | — | 149.2K |
| Andersen EricPresident · 79 transactions | — | 176.2Kas of Feb 2025 | 384.0K | — | 49.5K |
| Appel Andrew MCOO · 63 transactions | — | 164.9Kas of Nov 2010 | 431.9K | — | 104.6K |
| Davies ChristaChief Financial Officer · 152 transactions | — | 162.7Kas of Feb 2024 | 1.46M | — | 814.5K |
| Bruno John GSection 16 Officer · 46 transactions | — | 152.7K†as of Feb 2021 | 167.3K | 1.0K | 17.6K |
| O'Connor Michael JCo-President · 75 transactions | — | 147.9Kas of Feb 2020 | 378.4K | — | 145.8K |
| Cole David LVSC - Chairman/CEO · 10 transactions | — | 141.0K†as of Mar 2006 | 112.3K | — | 105.9K |
| Bungert Michael GAon Re Inc. - President/CEO · 36 transactions | — | 138.6K†as of Jan 2007 | 48.7K | — | — |
| Savacool Kristi ACEO - Aon Hewitt · 32 transactions | — | 135.6Kas of Feb 2017 | 239.0K | — | — |
| Ravin Richard MCICA - Chairman/CEO · 10 transactions | — | 130.9K†as of May 2007 | 66.3K | — | — |
| Verbeek Dirk PieterAon Holdings bv - MD/CEO · 4 transactions | — | 100.3Kas of Mar 2006 | 37.7K | — | 36.0K |
| Clement PhilipGlobal Chief Marketing Officer · 30 transactions | — | 95.0K†as of Feb 2013 | 102.7K | — | 57.3K |
| Jannotta Edgar DDirector · 14 transactions | — | 84.7Kas of Jun 2014 | 75.3K | — | — |
| Santona GloriaDirector · 27 transactions | — | 80.0K† | 46.6K | — | — |
| Conway Michael ASenior VP and Investment Ofr · 7 transactions | — | 71.1K†as of Aug 2006 | 7.9K | — | — |
| Fung Bernard SAon Asia Pacific-Chairman/CEO · 19 transactions | — | 68.0Kas of Mar 2010 | 125.0K | — | 58.7K |
| Findlay D CameronExec VP & General Counsel · 46 transactions | — | 67.8Kas of Mar 2009 | 299.5K | — | 196.8K |
| Farmer Jeremy G OSenior VP & Head of HR · 74 transactions | — | 67.7Kas of May 2011 | 192.3K | — | 61.0K |
| Devine Ted TExec VP · 24 transactions | — | 60.6Kas of Aug 2009 | 263.4K | — | 220.7K |
| Morrison Robert SDirector · 14 transactions | — | 56.1Kas of Jun 2017 | 60.6K | 2.0K | — |
| Grace CarolineCEO, Global Retirement & Inves · 30 transactions | — | 53.8Kas of Feb 2019 | 35.8K | — | 12.0K |
| Bolger David PExec. VP & CFO (former) · 24 transactions | — | 53.4Kas of Mar 2008 | 80.7K | — | — |
| Losh J MichaelDirector · 24 transactions | — | 52.4K†as of Jun 2022 | 52.1K | — | 14.0K |
| Weitz AndyChief Marketing Officer · 42 transactions | — | 41.3Kas of Feb 2024 | 47.2K | — | — |
| Rogers John W JrDirector · 4 transactions | — | 39.4K†as of Apr 2012 | 10.9K | 1.5K | — |
| Zern JohnCEO, Aon Global Health · 28 transactions | — | 38.0Kas of Aug 2019 | 43.0K | — | 32.4K |
| Conti FulvioDirector · 34 transactions | — | 31.2Kas of Jun 2024 | 28.6K | 8.0K | 411 |
| Francis Cheryl ADirector · 22 transactions | — | 29.5K | 30.0K | — | — |
| Goland Anthony RChief Innovation Officer · 43 transactions | — | 29.3Kas of Feb 2021 | 85.3K | — | 18.9K |
| Notebaert Richard CDirector · 44 transactions | — | 28.3K | 74.3K | — | — |
| Myers Richard BDirector · 18 transactions | — | 27.6Kas of Jun 2021 | 33.3K | 1.0K | 4.1K |
| Woo Carolyn YDirector · 32 transactions | — | 27.5Kas of Jun 2023 | 48.0K | — | 20.9K |
| Stevens LisaChief Administrative Officer · 64 transactions | — | 26.3K | 77.5K | — | 15.0K |
| McKenna Andrew JDirector · 1 transaction | — | 22.6Kas of Mar 2012 | — | — | — |
| Hayley KathrynACW - Chief Executive Officer · 25 transactions | — | 21.6Kas of Jun 2010 | 96.7K | — | 54.5K |
| Mahoney Dennis LAon Limited - Chairman/CEO · 14 transactions | — | 20.4K†as of Mar 2007 | 71.1K | — | 45.0K |
| Zeidel DarrenGeneral Counsel · 89 transactions | — | 16.0K | 64.8K | — | 26.4K |
| Martin R EdenDirector · 4 transactions | — | 14.1Kas of Apr 2012 | 4.1K | 5.0K | — |
| Hunger Daniel FSenior VP & Controller · 14 transactions | — | 12.9K†as of Mar 2008 | 7.3K | — | — |
| Campbell Jeffrey CDirector · 14 transactions | — | 12.6K | 7.8K | 5.5K | — |
| Meissner Laurel G.Global Controller · 72 transactions | — | 12.3Kas of Feb 2018 | 117.9K | — | 66.2K |
| Harmer PeterAon Limited - CEO · 22 transactions | — | 12.3Kas of Aug 2009 | 68.8K | — | 56.1K |
| Levin MatthewEVP - Head of Global Strategy · 6 transactions | — | 12.0Kas of Aug 2013 | 17.7K | — | — |
| Neller MichaelPrincipal Accounting Officer · 84 transactions | — | 10.9K†as of Mar 2025 | 31.3K | — | 13.7K |
| Marcell AndyGlobal CEO, Solution Lines · 8 transactions | — | 9.0K | 14.6K | — | — |
| Cai Jin-YongDirector · 21 transactions | — | 8.2K | 10.0K | — | — |
| Kalff JanDirector · 6 transactions | — | 7.0Kas of Jun 2011 | 6.6K | — | 4.0K |
| Goltermann LoriCEO, Regions & North America · 8 transactions | — | 6.7K | 7.6K | — | — |
| Simon Mindy F.Chief Operating Officer · 11 transactions | — | 6.6K | 11.7K | — | 650 |
| Spruell ByronDirector · 15 transactions | — | 6.6K | 5.0K | 2.1K | — |
| Stavridis James G.Director · 6 transactions | — | 6.4K† | 2.0K | — | — |
| Leng James WDirector · 3 transactions | — | 5.2Kas of Jun 2016 | 5.2K | — | — |
| Platt JamesChief Operating Officer · 6 transactions | — | 4.6Kas of Mar 2022 | 842 | — | — |
| Lieb Peter MGeneral Counsel · 103 transactions | — | 4.4Kas of May 2019 | 378.8K | — | 224.7K |
| Corona AnneChief Commercial Officer · 8 transactions | — | 4.2K | 3.7K | — | — |
| Aigotti DianeSenior VP & Treasurer · 12 transactions | — | 3.6K†as of Mar 2008 | 4.3K | — | — |
| Karaboutis AdrianaDirector · 9 transactions | — | 2.8K | 3.3K | — | — |
| Reese EdmundChief Financial Officer · 4 transactions | — | 2.4K | 4.6K | — | — |
| Legris YvanCEO EMEA - Aon Hewitt · 4 transactions | — | 2.1Kas of Mar 2013 | 4.5K | — | — |
| Smith Sarah GDirector · 10 transactions | — | 2.1K† | 2.9K | — | — |
| Slyfield JillianChief Innovation Officer · 44 transactions | — | 1.9Kas of Sep 2024 | 2.5K | — | — |
| Alvarez Jose AntonioDirector · 8 transactions | — | 1.3K | 2.4K | — | — |
| Jenkins Jo AnnDirector · 4 transactions | — | 1.1K | 1.3K | — | — |
| Dail BaljitACW - CEO · 23 transactions | — | 860as of May 2011 | 78.3K | — | 15.0K |
| Green Judson CDirector · 2 transactions | — | 0as of Oct 2010 | 2.3K | — | — |