X0609 4 2026-09-30 0 0001096343 MARKEL GROUP INC. MKL 0001873434 Costanzo Brian J. false C/O MARKEL GROUP INC. 4521 HIGHWOODS PARKWAY GLEN ALLEN VA 23060 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-09-30 5 J 0 E 2.061 1455.58 A 1634.3004 D Common Stock 231.821 I 401(k) Plan Shares acquired under the qualified component of the MKL 2020 Employee Stock Purchase Plan in a transaction exempt under Exchange Act Rule 16b-3(c). Between June 30, 2026 and September 30, 2026, the reporting person acquired 2.229 shares under the MKL 401(k) plan. The information reported herein is based on the plan balance as of September 30, 2026. /s/ Karen O. Earls, Attorney-in-fact for Brian J. Costanzo 2026-10-16