Exhibit 32.1

CERTIFICATION

FURNISHED PURSUANT TO 18 U.S.C. SECTION 1350

In connection with the Quarterly Report of Markel Corporation (the "Company") on Form 10-Q for the period ended June 30, 2020 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

July 28, 2020	/s/ Thomas S. Gayner
	Thomas S. Gayner
	Co-Chief Executive Officer
	(Co-Principal Executive Officer)
	/s/ Richard R. Whitt, III
	Richard R. Whitt, III
	Co-Chief Executive Officer
	(Co-Principal Executive Officer)
	/s/ Jeremy A. Noble
	Jeremy A. Noble
	Senior Vice President and Chief Financial Officer
	(Principal Financial Officer)