| Berkley William R JrPresident and CEO, Director · 67 transactions | — | 140.04M† | 2.06M | — | — |
| Berkley William RExecutive Chairman, Director, 10% owner · 74 transactions | — | 91.00M† | 8.83M | — | — |
| Mitsui Sumitomo Insurance Co LTD +1 co-filer10% owner · 94 transactions | — | 58.71M | — | 10.18M | — |
| Brockbank Mark EllwoodDirector · 24 transactions | — | 1.39M†as of Aug 2022 | 87.4K | 6.0K | 102.0K |
| Shiel James GEVP - Investments · 68 transactions | — | 1.01M† | 440.7K | 40 | 171.7K |
| Lederman Ira SEVP & Secretary · 23 transactions | — | 492.4K†as of Dec 2019 | 272.1K | — | 36.5K |
| Ballard Eugene GEVP, Finance · 16 transactions | — | 251.7Kas of Aug 2017 | 180.1K | — | 49.3K |
| Sgaglione Lucille TEVP · 18 transactions | — | 250.5K†as of Aug 2025 | 87.2K | — | — |
| Baio Richard MarkEVP & CFO · 23 transactions | — | 235.6K†as of Aug 2025 | 92.1K | — | — |
| Cole Robert PSVP - Regional Operations · 8 transactions | — | 227.4K†as of Mar 2010 | 190.2K | — | 62.9K |
| Welt Philip SEVP & Secretary · 13 transactions | — | 225.5K†as of Aug 2025 | 45.2K | — | — |
| Farrell Mary CDirector · 26 transactions | — | 161.0K† | 57.8K | 2.0K | — |
| Nusbaum Jack HDirector · 15 transactions | — | 149.8Kas of Jun 2020 | 40.3K | — | — |
| Blaylock Ronald EDirector · 25 transactions | — | 147.9K† | 63.5K | — | 7.5K |
| Shapiro Mark LDirector · 21 transactions | — | 145.5K†as of Jun 2024 | 57.7K | — | — |
| Patafio Clement PVP - Corporate Controller · 17 transactions | — | 126.6Kas of Dec 2012 | 139.8K | 63.6K | 118.5K |
| Augostini Christopher LDirector · 17 transactions | — | 109.9K | 51.5K | — | — |
| Hancock Paul JSVP - Chief Corporate Actuary · 5 transactions | — | 87.9Kas of Mar 2010 | 64.5K | — | 26.6K |
| Hewitt Robert CSVP-Excess and Surplus Lines · 2 transactions | — | 85.0Kas of Mar 2010 | 37.0K | — | — |
| Stone Robert DalySVP - Alt. Mkts. Operations · 5 transactions | — | 82.3K†as of Mar 2010 | 36.0K | — | 3.1K |
| Ferre Maria LuisaDirector · 10 transactions | — | 59.2K | 29.8K | — | — |
| Ebers Kevin HSVP - Information Technology · 9 transactions | — | 59.1K†as of May 2010 | 47.9K | — | 14.0K |
| Gosselink Robert WSVP-Insurance Risk Mgmnt. · 2 transactions | — | 52.0K†as of Mar 2010 | 24.5K | — | — |
| Madsen Carl FredSVP - Reinsurance Operations · 3 transactions | — | 50.5Kas of Mar 2010 | 50.5K | — | — |
| Taylor Steven WilliamSVP - International · 2 transactions | — | 41.0Kas of Mar 2010 | 35.0K | — | — |
| Daly George GDirector · 12 transactions | — | 40.8Kas of Nov 2016 | 28.0K | — | — |
| LaPunzina Carol JosephineSVP - Human Resources · 2 transactions | — | 35.8K†as of Mar 2010 | 21.8K | — | — |
| Talisman JonathanDirector · 15 transactions | — | 34.0K† | 21.7K | 18 | — |
| Kamford Peter LindSVP-Admitted Specialty Lines · 2 transactions | — | 31.9K†as of Jun 2008 | 25.0K | — | — |
| Hawes Rodney A JrDirector · 7 transactions | — | 20.5Kas of May 2011 | 13.0K | 2.5K | — |
| Ricciardi Matthew MSVP and General Counsel · 3 transactions | — | 15.6Kas of May 2018 | 14.1K | — | — |
| Mosley Daniel LynnDirector · 4 transactions | — | 14.9K | 11.9K | — | — |
| Pusey Leigh AnnDirector · 6 transactions | — | 13.2Kas of Dec 2021 | 14.5K | — | — |
| Ablove Philip JDirector · 3 transactions | — | 11.7Kas of May 2008 | 5.0K | — | — |
| Mattson Marie AngelaDirector · 3 transactions | — | 9.7K | 8.4K | — | — |
| Rusbuldt Robert AlanDirector · 2 transactions | — | 5.9K | 5.9K | — | — |
| Hafter Jeffrey MarcSVP · 1 transaction | — | 0as of May 2010 | 15.0K | — | — |
| James Gillian BSVP-Enterprise Risk Management · 1 transaction | — | 0as of Dec 2009 | 10.0K | — | — |