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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001181431-10-008991.txt : 20100216
<SEC-HEADER>0001181431-10-008991.hdr.sgml : 20100215
<ACCEPTANCE-DATETIME>20100216100950
ACCESSION NUMBER:		0001181431-10-008991
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20091231
FILED AS OF DATE:		20100216
DATE AS OF CHANGE:		20100216

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEWMARKET CORP
		CENTRAL INDEX KEY:			0001282637
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1231

	MAIL ADDRESS:	
		STREET 1:		330 S FOURTH ST
		STREET 2:		PO BOX 2189
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23218-2189

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hazelgrove Bruce R III
		CENTRAL INDEX KEY:			0001318864

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32190
		FILM NUMBER:		10602969

	MAIL ADDRESS:	
		STREET 1:		330 SOUTH FOURTH STREET
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23219
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>rrd262773.xml
<DESCRIPTION>FORM 5 FOR BRUCE HAZELGROVE
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2009-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0001282637</issuerCik>
        <issuerName>NEWMARKET CORP</issuerName>
        <issuerTradingSymbol>NEU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001318864</rptOwnerCik>
            <rptOwnerName>Hazelgrove Bruce R III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>330 SOUTH FOURTH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>RICHMOND</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>23219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP - Corporate Resources</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-12-31</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>950.6099</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19719.31</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>NewMarket Savings Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionCoding></transactionCoding>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>352</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionCoding></transactionCoding>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1070</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by wife</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionCoding></transactionCoding>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>23</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by son</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Various dates - Contributions to the Savings Plan for the Employees of NewMarket Corporation and Affiliates (the &quot;Plan&quot;) throughout the year</footnote>
        <footnote id="F2">The increase in shares is due to periodic purchase by the Plan Trustee pursuant to the Plan</footnote>
        <footnote id="F3">Price varies since contributions are made throughout the year</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ M. Rudolph West (by Power of Attorney for Bruce Hazelgrove)</signatureName>
        <signatureDate>2010-02-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.
<SEQUENCE>2
<FILENAME>rrd235216_265658.htm
<DESCRIPTION>POWER OF ATTORNEY FOR BRUCE HAZELGROVE
<TEXT>
<HTML>
<HEAD>
<TITLE>
rrd235216_265658.html
</TITLE>
</HEAD>
<BODY>
<PRE>
                             NEWMARKET CORPORATION
                            330 SOUTH FOURTH STREET
                              POST OFFICE BOX 2189
                         RICHMOND, VIRGINIA 23218-2189

                               POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Steven M. Edmonds and M. Rudolph West, signing singly, the undersigned's
true and lawful attorney-in-fact to:

(1)  execute for and on behalf of the undersigned, in the undersigned's capacity
     as an officer and or director of NewMarket Corporation (the Company)
     forms 3, 4 and 5 in accordance with Section 16(a) of the Securities
     Exchange Act of 1934 and the rules thereunder;

(2)  do and perform any and all acts for and on behalf of the undersigned that
     may be necessary or desirable to complete and execute any such Form 3, 4
     or 5, complete and execute any amendment or amendments thereto, and timely
     file such form with the United States Securities and Exchange Commission
     and any stock exchange or similar authority; and

(3)  take any other action of any type whatsoever in connection with the
     foregoing that, in the opinion of such attorney-in-fact, may be of benefit
     to, in the best interest of, or legally required by, the undersigned, it
     being understood that the documents executed by such attorney-in- fact on
     behalf of the undersigned pursuant to this Power of Attorney shall be in
     such form and shall contain such terms and conditions as such
     attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 or 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 22nd day of February, 2005.

                                         /s/ Bruce R. Hazelgrove, III
                                         ----------------------------
                                                 Signature

                                         Bruce R. Hazelgrove, III

</PRE>
</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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