Markel Group Inc - Company Profile
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The following section provides information on Markel Group Inc’s senior management, executives, CEO and key decision makers and their roles in the organization. For more insight into Markel Group Inc's management and employees, unlock the full data with our company analytics monitoring tool.
Executives
Thomas S. Gayner
Chairman; Chief Executive Officer; Director Executive BoardMr. Thomas S. Gayner has been the Chairman of the company since September 2026. He also serves as the Chief Executive Officer of the company since January 2023 and Director since 2016. Prior to this, he served as the Co-Chief Executive Officer at the company. Previously, he served as the President and Chief Investment Officer from 2010 to 2015 and Director at The Coca-Cola Company and Graham Holdings Company.
Brian J. Costanzo
Chief Financial Officer - Markel Insurance; Chief Financial Officer Senior ManagementMr. Brian J. Costanzo has been the Chief Financial Officer of the company since December 2023. He also serves as Chief Financial Officer of Markel Insurance since December 2023. Previously, he served as the Senior Vice President of Finance, Chief Accounting Officer and Controller from 2022 to 2023. Prior to this, he held the position of Principal Financial Officer (on an interim basis) from 2023 to 2023. He also served as the Chief Accounting Officer and Controller from 2021 to 2022. Mr. Costanzo was the Controller from 2019 to 2021 and the Segment Controller - U.S. Insurance from 2014 to 2019.
Richard R. Grinnan
Chief Legal Officer; Secretary; Senior Vice President Senior ManagementMr. Richard R. Grinnan has been the Chief Legal Officer, Secretary and Senior Vice President of the company since February 2020. Previously, he served as the General Counsel and Secretary of the company from June 2014 to February 2020. Earlier, he worked as the Assistant General Counsel from August 2012 to June 2014.
Amy McCann
Chief Administrative Officer Senior ManagementMs. Amy McCann has been the Chief Administrative Officer of the company since September 2026. Previously, he served as General Counsel of Markel Ventures.
Andrew Crowley
Co-President Senior ManagementStill looking?
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