<SEC-DOCUMENT>0001096343-18-000176.txt : 20180907
<SEC-HEADER>0001096343-18-000176.hdr.sgml : 20180907
<ACCEPTANCE-DATETIME>20180907170620
ACCESSION NUMBER:		0001096343-18-000176
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:			Noble Jeremy Andrew
		CENTRAL INDEX KEY:			0001751358

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15811
		FILM NUMBER:		181060751

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

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_153635436314180.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>0001751358</rptOwnerCik>
            <rptOwnerName>Noble Jeremy Andrew</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 &amp; CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>524.2805</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>184.036</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 Jeremy A. Noble</signatureName>
        <signatureDate>2018-09-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>a2018september5-confirming.htm
<DESCRIPTION>2018 - NOBLE POA 09052018
<TEXT>
<!-- Document created using Workiva -->
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<pre>
CONFIRMING STATEMENT


    This Statement confirms that the undersigned has authorized and designated Richard R.
Grinnan, 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/ Jeremy A. Noble
                            Signature

                            Jeremy A. Noble
                            Printed Name


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