MARKEL GROUP INC.

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this quarterly report, we evaluated the effectiveness of the design and operation of our disclosure controls and procedures (Disclosure Controls), as defined under Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934 (Exchange Act). This evaluation was conducted under the supervision and with the participation of our management, including the Principal Executive Officer (PEO) and the Principal Financial Officer (PFO).

Based upon this evaluation, the PEO and PFO concluded that effective Disclosure Controls were in place to ensure that the information required to be disclosed in reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms.

Changes in Internal Control over Financial Reporting

During the second quarter of 2025, we implemented a new actuarial reserving system within Markel Insurance to store, model and review actuarial data. The new system provides our actuarial reserving process with improved performance and additional functionality. Throughout the transition and upon implementation of the new system, we evaluated the impact of the new system on our internal control over financial reporting and added new controls or made updates to controls as necessary. There were no other changes in our internal control over financial reporting during the second quarter of 2025 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.