<SEC-DOCUMENT>0000921895-16-003436.txt : 20160217
<SEC-HEADER>0000921895-16-003436.hdr.sgml : 20160217
<ACCEPTANCE-DATETIME>20160217182812
ACCESSION NUMBER:		0000921895-16-003436
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160212
FILED AS OF DATE:		20160217
DATE AS OF CHANGE:		20160217

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FOSTER L B CO
		CENTRAL INDEX KEY:			0000352825
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
		IRS NUMBER:				251324733
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		415 HOLIDAY DR
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220
		BUSINESS PHONE:		4129283431

	MAIL ADDRESS:	
		STREET 1:		415 HOLIDAY DR
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Vizi Bradley
		CENTRAL INDEX KEY:			0001556313

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10436
		FILM NUMBER:		161435481

	MAIL ADDRESS:	
		STREET 1:		1247 STONER AVENUE, #207
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form409050008_02172016.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-02-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000352825</issuerCik>
        <issuerName>FOSTER L B CO</issuerName>
        <issuerTradingSymbol>FSTR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001556313</rptOwnerCik>
            <rptOwnerName>Vizi Bradley</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9401 WILSHIRE BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 705</rptOwnerStreet2>
            <rptOwnerCity>BEVERLY HILLS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90212</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-02-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>400</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>400</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>559919</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By: Legion Partners, L.P. I</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>108856</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By: Legion Partners, L.P. II</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>317361</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By: Legion Partners Special Opportunities, L.P. II</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Legion Partners, L.P. I (&quot;Legion Partners I&quot;) directly owns these shares of common stock (&quot;Common Stock&quot;) of L.B. Foster Company (the &quot;Issuer&quot;). Legion Partners, LLC is the general partner of Legion Partners I, Legion Partners Asset Management, LLC (&quot;Legion Partners Asset Management&quot;), is the investment advisor of Legion Partners I, Legion Partners Holdings, LLC (&quot;Legion Partners Holdings&quot;), is the sole member of Legion Partners Asset Management and managing member of Legion Partners, LLC, and each of Bradley S. Vizi, Christopher S. Kiper and Raymond White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners, LLC, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I.</footnote>
        <footnote id="F2">Legion Partners, L.P. II (&quot;Legion Partners II&quot;) directly owns these shares of Common Stock. Legion Partners, LLC is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of Legion Partners, LLC, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners, LLC, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II.</footnote>
        <footnote id="F3">Legion Partners Special Opportunities, L.P. II (&quot;Legion Partners Special II&quot;), directly owns these shares of Common Stock. Legion Partners, LLC is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of Legion Partners, LLC, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners, LLC, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II.</footnote>
        <footnote id="F4">Not applicable, as the share amount represents a pro-rated Director Equity Award granted by the Issuer to Mr. Vizi in his capacity as a director of the Issuer.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Bradley S. Vizi</signatureName>
        <signatureDate>2016-02-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
