<SEC-DOCUMENT>0001096343-18-000177.txt : 20180907
<SEC-HEADER>0001096343-18-000177.hdr.sgml : 20180907
<ACCEPTANCE-DATETIME>20180907170658
ACCESSION NUMBER:		0001096343-18-000177
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180905
FILED AS OF DATE:		20180907
DATE AS OF CHANGE:		20180907

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SCHREINER LINDA V
		CENTRAL INDEX KEY:			0001144925

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15811
		FILM NUMBER:		181060756

	MAIL ADDRESS:	
		STREET 1:		C/O MEADWESTVACO CORP.
		STREET 2:		ONE HIGH RIDGE PARK
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06905

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MARKEL CORP
		CENTRAL INDEX KEY:			0001096343
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				541959284
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4521 HIGHWOODS PARKWAY
		CITY:			GLEN ALLEN
		STATE:			VA
		ZIP:			23060-6148
		BUSINESS PHONE:		8047470136

	MAIL ADDRESS:	
		STREET 1:		4521 HIGHWOODS PKWY
		CITY:			GLEN ALLEN
		STATE:			VA
		ZIP:			23060

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MARKEL HOLDINGS INC
		DATE OF NAME CHANGE:	19991005
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>wf-form3_153635440202468.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2018-09-05</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001096343</issuerCik>
        <issuerName>MARKEL CORP</issuerName>
        <issuerTradingSymbol>MKL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001144925</rptOwnerCik>
            <rptOwnerName>SCHREINER LINDA V</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MARKEL CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>4521 HIGHWOODS PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>GLEN ALLEN</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>23060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Strategic Management</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1144.3646</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>79.683</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401(K) Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Donna S. Donavant, Attorney-in-fact for Linda V. Schreiner</signatureName>
        <signatureDate>2018-09-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>a2018september5-confirming.htm
<DESCRIPTION>2018 - SCHREINER POA 09052018
<TEXT>
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<pre>
CONFIRMING STATEMENT


    This Statement confirms that the undersigned has authorized and designated Richard R.
Grinnan, Jeremy A. Noble, Karl M. Strait, Anna M. King, Brian D. Sorkin or Donna S.
Donavant (each an "Authorized Signer") to execute and file (in any permitted format) on the
undersigned's behalf all Forms 3, 4 and 5 (including any amendments thereto) and Form 144s
that the undersigned may be required to file with the United States Securities and Exchange
Commission as a result of the undersigned's ownership of, or transactions in, securities of Markel
Corporation.  Any such previous authorization is hereby revoked.  Each Authorized Signer is
authorized to obtain CIK and EDGAR access codes and take all such other actions as may be
necessary or desirable to permit electronic filings of such forms.  The authority of each
Authorized Signer under this Statement shall continue until the undersigned is no longer required
to file Forms 3, 4 or 5 or Form 144s with regard to the undersigned's ownership of, or
transactions in, securities of Markel Corporation, unless earlier revoked in writing.  The
undersigned acknowledges that none of the Authorized Signers or Markel Corporation is
assuming any of the undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934 or Rule 144.

Date:  September 5, 2018


                            /s/ Linda V. Schreiner
                            Signature

                            Linda V. Schreiner
                            Printed Name


</pre>
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</TEXT>
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</SEC-DOCUMENT>
