UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 2022 Commission File Number 001-15811 MARKEL CORPORATION (Exact name of registrant as specified in its charter) A Virginia Corporation IRS Employer Identification No. 54-1959284 4521 Highwoods Parkway, Glen Allen, Virginia 23060-6148 (Address of principal executive offices) (Zip code) Registrant's telepho ...