FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Crowley F. Michael   2. Issuer Name and Ticker or Trading Symbol MARKEL CORP [MKL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & Co-COO (Last) (First) (Middle) C/O MARKEL CORPORATION, 4521 HIGHWOODS PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 08/21/2013 (Street) GLEN ALLEN, VA 23060 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/21/2013   S   300 D $ 517.2801 12,621 (1) D   Common Stock               71.262 I 401(K) Plan (2)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Crowley F. Michael C/O MARKEL CORPORATION 4521 HIGHWOODS PARKWAY GLEN ALLEN, VA 23060			President & Co-COO

Signatures

/s/ Donna L. Strauss, Attorney-in-fact for F. Michael Crowley		08/23/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This total includes 1,118 restricted stock units awarded pursuant to the Markel Corporation 2012 Equity Incentive Compensation Plan and the Markel Corporation Omnibus Incentive Plan, as applicable, that will vest, subject to certain conditions, on December 31, 2017; 2,224 restricted stock units awarded pursuant to the Markel Corporation Omnibus Incentive Plan that will vest, subject to certain conditions, on May 10, 2015; 3,357 restricted stock units awarded pursuant to the Markel Corporation Omnibus Incentive Plan, of which 1,673 units will vest on December 31, 2015, and 1,684 units will vest on December 31, 2016, and 3,805 restricted stock units awarded pursuant to the Markel Corporation 2012 Equity Incentive Compensation Plan that will vest on May 13, 2016.
(2)	Holdings under the Markel Corporation 401(K) Plan are reported in units. The information reported herein is based on a plan statement dated as of July 31, 2013 and utilizes the closing stock price on that date of $530.00 per share. As of July 31, 2013, a unit under the Plan represented one share of Common Stock.

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