<SEC-DOCUMENT>0001257640-11-000005.txt : 20110516
<SEC-HEADER>0001257640-11-000005.hdr.sgml : 20110516
<ACCEPTANCE-DATETIME>20110516133213
ACCESSION NUMBER:		0001257640-11-000005
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20110513
FILED AS OF DATE:		20110516
DATE AS OF CHANGE:		20110516

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SIMMONS HAROLD C
		CENTRAL INDEX KEY:			0001037854
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845230

	MAIL ADDRESS:	
		STREET 1:		THREE LINCOLN CENTRE
		STREET 2:		5430 LBJ FREEWAY STE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240-2697

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KRONOS WORLDWIDE INC
		CENTRAL INDEX KEY:			0001257640
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		IRS NUMBER:				760294959
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		9722331700

	MAIL ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KRONOS INC
		DATE OF NAME CHANGE:	20030730

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CONTRAN CORP
		CENTRAL INDEX KEY:			0000024240
		STANDARD INDUSTRIAL CLASSIFICATION:	PERSONAL CREDIT INSTITUTIONS [6141]
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845229

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FRWY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		9724504228

	MAIL ADDRESS:	
		STREET 1:		5430 LBJ FRWY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VALHI INC /DE/
		CENTRAL INDEX KEY:			0000059255
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845228

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FRWY
		STREET 2:		STE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		9722331700

	MAIL ADDRESS:	
		STREET 1:		THREE LINCOLN CENTER
		STREET 2:		5430 LBJ FREEWAY SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240

	FORMER NAME:	
		FORMER CONFORMED NAME:	LLC CORP
		DATE OF NAME CHANGE:	19870329

	FORMER NAME:	
		FORMER CONFORMED NAME:	LIBERTY LOAN CORP
		DATE OF NAME CHANGE:	19800414

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NL INDUSTRIES INC
		CENTRAL INDEX KEY:			0000072162
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845223

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240-2697
		BUSINESS PHONE:		972-233-1700

	MAIL ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240-2697

	FORMER NAME:	
		FORMER CONFORMED NAME:	NATIONAL LEAD CO
		DATE OF NAME CHANGE:	19710520

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TITANIUM METALS CORP
		CENTRAL INDEX KEY:			0001011657
		STANDARD INDUSTRIAL CLASSIFICATION:	SECONDARY SMELTING & REFINING OF NONFERROUS METALS [3341]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845225

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		9722331700

	MAIL ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DIXIE RICE AGRICULTURE CORP INC
		CENTRAL INDEX KEY:			0001074787

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845226

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		9722331700

	MAIL ADDRESS:	
		STREET 1:		600 PASQUIERE ST
		CITY:			GUEYDAN
		STATE:			LA
		ZIP:			70542

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TIMET FINANCE MANAGEMENT CO
		CENTRAL INDEX KEY:			0001074791

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845224

	BUSINESS ADDRESS:	
		STREET 1:		1007 ORANGE ST
		STREET 2:		SUITE 1414
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19801
		BUSINESS PHONE:		9722331700

	MAIL ADDRESS:	
		STREET 1:		1007 ORANGE ST
		STREET 2:		SUITE 1414
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19801

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VALHI HOLDING CO
		CENTRAL INDEX KEY:			0001338019

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31763
		FILM NUMBER:		11845227

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		972-233-1700

	MAIL ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
</SEC-HEADER>
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    <documentType>4</documentType>

    <periodOfReport>2011-05-13</periodOfReport>

    <issuer>
        <issuerCik>0001257640</issuerCik>
        <issuerName>KRONOS WORLDWIDE INC</issuerName>
        <issuerTradingSymbol>KRO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001037854</rptOwnerCik>
            <rptOwnerName>SIMMONS HAROLD C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
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            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
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            <officerTitle>Chairman of the Board</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000024240</rptOwnerCik>
            <rptOwnerName>CONTRAN CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
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            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000059255</rptOwnerCik>
            <rptOwnerName>VALHI INC /DE/</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
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            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001338019</rptOwnerCik>
            <rptOwnerName>VALHI HOLDING CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001074787</rptOwnerCik>
            <rptOwnerName>DIXIE RICE AGRICULTURE CORP INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001011657</rptOwnerCik>
            <rptOwnerName>TITANIUM METALS CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001074791</rptOwnerCik>
            <rptOwnerName>TIMET FINANCE MANAGEMENT CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000072162</rptOwnerCik>
            <rptOwnerName>NL INDUSTRIES INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2011-05-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>11587</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>53.7347</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>98254</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by TFMC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2011-05-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>82105</value>
                    <footnoteId id="F4"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>54.8204</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>180459</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by TFMC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2011-05-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6308</value>
                    <footnoteId id="F5"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>55.3305</value>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>186667</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by TFMC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>259220</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28995021</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by Valhi</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>17609635</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by NL</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>54856</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by Spouse</value>
                    <footnoteId id="F8"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock $0.01 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2686</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by Contran</value>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
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    <footnotes>
        <footnote id="F1">Open market purchase by TIMET Finance Management Company.  See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing.</footnote>
        <footnote id="F2">The price reported in Column 4 is a weighted average price.  These acquisitions involved 77 purchases at prices ranging from $53.20 to $54.17 per share.  The reporting persons undertake to provide to the issuer, any security holder of the issuer or the U.S. Security and Exchange Commission, upon request, the full information regarding these purchases.</footnote>
        <footnote id="F3">Directly held by TIMET Finance Management Company.  See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price.  These acquisitions involved 333 purchases at prices ranging from $54.25 to $55.24 per share.  The reporting persons undertake to provide to the issuer, any security holder of the issuer or the U.S. Security and Exchange Commission, upon request, the full information regarding these purchases.</footnote>
        <footnote id="F5">The price reported in Column 4 is a weighted average price.  These acquisitions involved 45 purchases at prices ranging from $55.26 to $55.49 per share.  The reporting persons undertake to provide to the issuer, any security holder of the issuer or the U.S. Security and Exchange Commission, upon request, the full information regarding these purchases.</footnote>
        <footnote id="F6">Directly held by Valhi, Inc.  See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing.</footnote>
        <footnote id="F7">Directly held by NL Industries, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship among the persons joining in this filing.</footnote>
        <footnote id="F8">Directly held by the reporting person's wife.  Mr. Simmons disclaims beneficial ownership of any shares of the issuer's common stock that his wife holds.  See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing.</footnote>
        <footnote id="F9">Directly held by Contran Corporation. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship among the persons joining in this filing.</footnote>
    </footnotes>

    <remarks>Exhibit Index
Exhibit 99 - Additional Information</remarks>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Attorney-in-fact, for Harold C. Simmons</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Secretary, for Contran Corporation</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Secretary, for Valhi, Inc.</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Secretary, for Valhi Holding Corporation</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Secretary, for Dixie Rice Agricultural Corporation, Inc.</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Assistant Secretary, for Titanium Metals Corporation</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis. Secretary, for NL Industries, Inc.</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Gregory M. Swalwell. Vice President, for TIMET Finance Management Company</signatureName>
        <signatureDate>2011-05-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>f4kro110513tmfc99.htm
<DESCRIPTION>EXHIBIT 99 ADDITIONAL INFORMATION
<TEXT>
<HTML><BODY><PRE>f4kro110513tmfc99.txt



Exhibit 99

Additional Information



     The following persons directly hold the following percentages of the

outstanding shares of common stock of Kronos Worldwide, Inc. ("Kronos"):



Valhi, Inc. ("Valhi")........................................50.0%

NL Industries, Inc. ("NL")...................................30.4%

Harold C. Simmons.............................................0.4%

TIMET Finance Management Company ("TFMC").....................0.3%

Annette C. Simmons............................................0.1%

Contran Corporation ("Contran")...............................less than 0.1%



Titanium Metals Corporation ("TIMET") is the sole stockholder of TFMC.



     The following persons directly hold the following percentages of the

outstanding shares of common stock of Valhi:



Valhi Holding Company ("VHC")................................92.7%

TFMC..........................................................1.3%

Harold Simmons Foundation, Inc. (the "Foundation")............0.8%

Contran Amended and Restated Deferred Compensation

  Trust ("CDCT")..............................................0.3%

Harold C. Simmons.............................................0.3%

Annette C. Simmons............................................0.2%

The Combined Master Retirement Trust ("CMRT").................0.1%

The Annette Simmons Grandchildren's Trust

  (the "Grandchildren's Trust") ..............................less than 0.1%

Contran.......................................................less than 0.1%



     Except as otherwise indicated, the following persons directly hold the

following percentages of the outstanding shares of common stock of TIMET:



VHC..........................................................23.2%

Annette C. Simmons...........................................12.1%

CMRT..........................................................8.6%

Harold C. Simmons.............................................3.1%

Kronos........................................................2.1%

Contran.......................................................2.0%

NL............................................................0.8%

Valhi.........................................................0.5%

Foundation....................................................less than 0.1%

Grandchildren's Trust.........................................less than 0.1%



NL's percentage ownership of TIMET common stock includes 0.3% directly held by

a subsidiary of NL.



     The following persons directly hold the following percentages of the

outstanding shares of common stock of NL:



Valhi........................................................83.0%

Harold C. Simmons.............................................2.2%

Annette C. Simmons............................................0.6%

TFMC..........................................................0.5%

Kronos........................................................less than 0.1%



     Dixie Rice Agricultural Corporation, Inc. ("Dixie Rice") is the direct

holder of 100% of the outstanding shares of common stock of VHC.  Contran is the

holder of 100% of the outstanding shares of common stock of Dixie Rice.



     Substantially all of Contran's outstanding voting stock is held by trusts

established for the benefit of certain children and grandchildren of Harold C.

Simmons (the "Trusts"), of which Mr. Simmons is the sole trustee, or is held by

Mr. Simmons or persons or other entities related to Mr. Simmons.  As sole

trustee of each of the Trusts, Mr. Simmons has the power to vote and direct the

disposition of the shares of Contran stock held by each of the Trusts.  Mr.

Simmons, however, disclaims beneficial ownership of any shares of Contran stock

that the Trusts hold.



     The Foundation is a tax-exempt foundation organized for charitable

purposes.  Harold C. Simmons is the chairman of the board of the Foundation and

may be deemed to control the Foundation.



     Contran sponsors the CMRT as a trust to permit the collective investment by

master trusts that maintain the assets of certain employee benefit plans Contran

and related companies adopt.  Mr. Simmons is the sole trustee of the CMRT and a

member of the trust investment committee for the CMRT.  Mr. Simmons is a

participant in one or more of the employee benefit plans that invest through the

CMRT.



     U.S. Bank National Association serves as the trustee of the CDCT.  Contran

established the CDCT as an irrevocable "rabbi trust" to assist Contran in

meeting certain deferred compensation obligations that it owes to Harold C.

Simmons.  If the CDCT assets are insufficient to satisfy such obligations,

Contran is obligated to satisfy the balance of such obligations as they come

due.  Pursuant to the terms of the CDCT, Contran (i) retains the power to vote

the shares of the issuer's common stock held directly by the CDCT, (ii) retains

dispositive power over such shares and (iii) may be deemed the indirect

beneficial owner of such shares.



     Mr. Harold C. Simmons is chairman of the board of Kronos, Valhi, TIMET,

VHC, Dixie Rice and Contran, and chairman of the board and chief executive

officer of NL.



     By virtue of the offices held, the stock ownership and his services as

trustee, all as described above, (a) Mr. Simmons may be deemed to control

certain of such entities and (b) Mr. Simmons and certain of such entities may be

deemed to possess indirect beneficial ownership of, and a pecuniary interest in,

shares of common stock directly held by certain of such other entities. However,

Mr. Simmons disclaims such beneficial ownership of, and such pecuniary interest

in, such shares beneficially owned, directly or indirectly, by any of such

entities, except to the extent of his vested beneficial interest, if any, in the

shares the CDCT and the CMRT hold directly.



     The reporting person understands that NL, a subsidiary of NL and Kronos

directly own 3,604,790 shares, 1,186,200 shares and 479,856 shares,

respectively, of Valhi common stock as of the date of this statement. As already

stated, Valhi is the direct holder of approximately 83.0% of the outstanding

shares of common stock of NL and 50.0% of the outstanding shares of Kronos

common stock.  As a result of Valhi's direct and indirect ownership of NL, its

subsidiary and Kronos, the reporting person further understands that, pursuant

to Delaware law, Valhi treats the shares of Valhi common stock that NL, its

subsidiary and Kronos own as treasury stock for voting purposes. For the

purposes of this statement, such shares of Valhi common stock that NL, its

subsidiary and Kronos hold directly are not deemed outstanding.



     Annette C. Simmons is the wife of Harold C. Simmons.  Mr. Simmons may be

deemed to share indirect beneficial ownership of the shares that his wife holds

directly.  Mr. Simmons disclaims beneficial ownership of all securities that his

wife holds directly.  Mrs. Simmons disclaims beneficial ownership of all shares

she does not hold directly.



     The Grandchildren's Trust is a trust of which Harold C. Simmons and his

wife are trustees and the beneficiaries are the grandchildren of his wife.  Mr.

Simmons, as co-trustee of this trust, has the power to vote and direct the

disposition of the shares of Valhi common stock the trust holds. Mr. Simmons

disclaims beneficial ownership of any shares that this trust holds.





















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