MKL: Leadership change · Other company developments

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Retirement of Steven A. Markel as Chairman of the Board; Appointment of Thomas S. Gayner as Chairman of the Board; Appointment of Simon Wilson and Andrew G. Crowley as Co-Presidents On September 8, 2026, Markel Group Inc. (the Company) issued a press release announcing that Steven A. Markel, the Company's Chairman of the Board of Directors, provided notice to the Company on September 3, 2026, that (i) he will not stand for re-election as a member of the Board at the 2027 Annual Meeting of Shareholders; and (ii) he will retire as Chairman of the Board (Chairman) upon appointment of his successor. The Company also announced in the press release that the Board appointed, on and effective September 8, 2026: • Thomas S. Gayner, current Director and Chief Executive Officer of the Company, to the additional role of Chairman, succeeding Mr. Markel. • Simon Wilson, current Executive Vice President and Chief Executive Officer, Markel Insurance, as Co-President and Chief Executive Officer, Markel Insurance; and • Andrew G. Crowley, current Executive Vice President and President, Markel Ventures, as Co-President and Chief Executive Officer, Markel Ventures. A copy of the press release making these announcements is furnished as Exhibit 99.1 to this Form 8-K. Compensation Changes for Certain Executive Officers On and effective September 8, 2026, the Compensation Committee of the Board approved increases in base salary for: • Mr. Gayner, from $1,100,000 to $1,210,000; • Mr. Wilson, from $897,967 to $1,083,520 1 ; and • Mr. Crowley, from $530,000 to $700,000. 1 Mr. Wilson is paid in Great British Pounds (GBP). Base salary disclosed