<SEC-DOCUMENT>0000095953-21-000114.txt : 20211227
<SEC-HEADER>0000095953-21-000114.hdr.sgml : 20211227
<ACCEPTANCE-DATETIME>20211227151651
ACCESSION NUMBER:		0000095953-21-000114
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20211216
FILED AS OF DATE:		20211227
DATE AS OF CHANGE:		20211227

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hutter Christopher Gerald
		CENTRAL INDEX KEY:			0001805399

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05200
		FILM NUMBER:		211520184

	MAIL ADDRESS:	
		STREET 1:		1400 16TH STREET
		STREET 2:		SUITE 250
		CITY:			OAK BROOK
		STATE:			IL
		ZIP:			60523

	FORMER NAME:	
		FORMER CONFORMED NAME:	Hutter Christopher Gerold
		DATE OF NAME CHANGE:	20200303

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNALLOY CORP
		CENTRAL INDEX KEY:			0000095953
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL PIPE & TUBES [3317]
		IRS NUMBER:				570426694
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4510 COX ROAD
		STREET 2:		SUITE 201
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23060
		BUSINESS PHONE:		864-585-3605

	MAIL ADDRESS:	
		STREET 1:		4510 COX ROAD
		STREET 2:		SUITE 201
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23060

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKMAN UHLER INDUSTRIES INC
		DATE OF NAME CHANGE:	19710510
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_164063619574256.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-12-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000095953</issuerCik>
        <issuerName>SYNALLOY CORP</issuerName>
        <issuerTradingSymbol>SYNL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001805399</rptOwnerCik>
            <rptOwnerName>Hutter Christopher Gerald</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4510 COX ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 201</rptOwnerStreet2>
            <rptOwnerCity>GLEN ALLEN</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>23060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Interim President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-12-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5418</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>155576</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Subscription Rights (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>12.75</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-12-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5418</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2021-11-30</value>
            </exerciseDate>
            <expirationDate>
                <value>2021-12-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5418.0</value>
                    <footnoteId id="F1"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On November 30, 2021, the issuer commenced a rights offering pursuant to which the issuer distributed non transferable subscription rights (the &quot;Subscription Rights&quot;) to holders of record of it common stock as of 5:00 p.m. New York Time, on November 29, 2021. Each eligible recordholder received on Subscription Right for each share of common stock held of record by such holder as of the record date. Each Subscription Right entitled its holder, subject to certain limitations and conditions, to purchase 0.083768 shares of common stock at a subscription price of $12.75 per whole share. Holders of Subscription Rights that exercised in full such basic subscription rights were entitled, subject to certain limitations and conditions, to oversubscribe for additional shares of common stock that remained unsubscribed for the rights offering. The rights offering expired on December 16, 2021 and the Company announced the results of the offering on December 17, 2021.</footnote>
        <footnote id="F2">Shares directly acquired by the reporting person as a result of their exercise of subscription rights and oversubscription privilege in connection with the issuer's rights offering.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Pauline A. Sumner, Power of Attorney for Christopher G. Hutter</signatureName>
        <signatureDate>2021-12-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
