| Warburg Pincus LLC +1 co-filer10% owner · 1 transaction | — | 18.88Mas of May 2006 | — | — | — |
| Tunnell David RDirector · 1 transaction | — | 9.37M†as of May 2006 | 569 | — | — |
| Pasquesi John MDirector, CHAIR · 141 transactions | — | 5.29M† | 2.34M | 484.5K | 2.65M |
| Warburg Pincus LLC10% owner · 4 transactions | — | 3.99Mas of Oct 2008 | — | — | — |
| Grandisson MarcCEO, Director · 134 transactions | — | 2.21M†as of Feb 2024 | 1.92M | 23.5K | 1.18M |
| Iordanou ConstantineChairman, Director · 200 transactions | — | 1.65M†as of Sep 2019 | 2.66M | 99.3K | 1.56M |
| Bunce John L JrDirector · 85 transactions | — | 1.56M | 71.7K | — | 550.0K |
| Hutchings W PrestonSVP & Chief Investment Officer · 102 transactions | — | 985.7K†as of Jun 2021 | 518.2K | 9.0K | 503.6K |
| Rajeh MaamounPresident, Arch Capital Group · 50 transactions | — | 938.0K† | 611.9K | — | 430.6K |
| Papadopoulo NicolasCEO, Director · 68 transactions | — | 871.6K | 743.0K | — | 497.2K |
| Gansberg DavidPresident, Arch Capital Group · 61 transactions | — | 336.6K | 385.3K | — | 53.8K |
| Morin FrancoisCFO and Treasurer · 55 transactions | — | 298.8K | 361.4K | — | 169.4K |
| Lee KewsongDirector · 41 transactions | — | 245.6Kas of May 2017 | 160.4K | — | 894.2K |
| Appel Peter ADirector · 8 transactions | — | 201.8Kas of Feb 2006 | 165.8K | — | 165.8K |
| Ingrey Paul BReporting owner · 357 transactions | — | 184.6Kas of Mar 2009 | 100.0K | 50.0K | 296.1K |
| Vollaro John DDirector · 66 transactions | — | 163.0K | 531.2K | — | 277.8K |
| Petrillo Louis TOfficer of Subsidiary · 168 transactions | — | 151.6K† | 740.8K | — | 419.2K |
| Lyons Mark DonaldEVP,CFO & Treasurer · 147 transactions | — | 145.2Kas of May 2018 | 627.2K | — | 532.2K |
| Hele John C.R.EVP,CFO & Treasurer · 16 transactions | — | 107.3Kas of Aug 2012 | 107.2K | — | 82.9K |
| Rippert AndrewChief Innov&Strateg Investmt · 7 transactions | — | 106.4Kas of Feb 2019 | 18.2K | — | 13.3K |
| Todd ChristineChief Investment Officer · 9 transactions | — | 100.2K | 99.3K | — | — |
| Doppstadt EricDirector · 20 transactions | — | 77.8Kas of May 2023 | 37.1K | — | — |
| McElroy DavidChairman & CEO Arch Insur Gr · 16 transactions | — | 74.8Kas of May 2017 | 68.2K | — | 25.0K |
| Carney SeanDirector · 22 transactions | — | 67.8K†as of May 2010 | 56.8K | — | 828.4K |
| Meenaghan James JDirector · 47 transactions | — | 61.4K†as of Dec 2014 | 39.9K | 22.1K | 29.3K |
| Works Robert FDirector · 35 transactions | — | 60.3Kas of May 2013 | 73.0K | — | 54.6K |
| Paglia Louis JDirector · 15 transactions | — | 54.1Kas of May 2023 | 34.1K | — | — |
| Lillikas YiorgosDirector · 21 transactions | — | 51.5K†as of Feb 2019 | 19.6K | 85 | 12.6K |
| Goodman LaurieDirector · 12 transactions | — | 37.6K | 32.0K | — | — |
| Kilcoyne Moira A.Director · 16 transactions | — | 35.8K | 35.8K | — | — |
| Sunshine Eugene SDirector · 12 transactions | — | 34.5Kas of May 2024 | 23.9K | — | — |
| Watjen Thomas RDirector · 7 transactions | — | 23.7Kas of May 2023 | 21.5K | — | — |
| Bragin Wolfe HDirector · 23 transactions | — | 18.7Kas of Nov 2012 | 14.7K | 1.3K | 12.8K |
| Rathgeber John FOfficer of subsidiary · 17 transactions | — | 14.5Kas of Feb 2008 | 9.8K | — | 4.0K |
| Mallesch Eileen ADirector · 7 transactions | — | 13.8K | 13.8K | — | — |
| Houston Daniel JosephDirector · 7 transactions | — | 13.3K | 8.0K | 5.3K | — |
| Ebong FrancisDirector · 7 transactions | — | 12.9K | 12.9K | — | — |
| Mulligan DeannaDirector · 8 transactions | — | 11.5Kas of May 2016 | 11.5K | — | — |
| Triplett Neal FDirector · 6 transactions | — | 8.0K | 8.0K | — | — |
| Moczarski Alexander SDirector · 3 transactions | — | 4.0K | 4.0K | — | — |
| Goldstein Jeffrey ADirector · 3 transactions | — | 735as of Jun 2007 | 492 | — | — |
| Jones Ralph E IIIChairman & CEO Arch Insur Gr · 64 transactions | — | 266†as of May 2008 | 50.0K | — | 50.0K |
| Posner Brian SDirector · 50 transactions | — | 0 | 56.9K | 27.0K | 12.0K |
| H&F Corp Investors IV Bermuda LTD10% owner · 3 transactions | — | 0as of May 2007 | — | — | — |