<SEC-DOCUMENT>0001567619-21-018993.txt : 20211029
<SEC-HEADER>0001567619-21-018993.hdr.sgml : 20211029
<ACCEPTANCE-DATETIME>20211029161447
ACCESSION NUMBER:		0001567619-21-018993
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20211028
FILED AS OF DATE:		20211029
DATE AS OF CHANGE:		20211029

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Foster Michael J.
		CENTRAL INDEX KEY:			0001423514

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07677
		FILM NUMBER:		211363397

	MAIL ADDRESS:	
		STREET 1:		P. O. BOX 268859
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73126

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LSB INDUSTRIES INC
		CENTRAL INDEX KEY:			0000060714
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		IRS NUMBER:				731015226
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3503 NW 63RD STREET
		STREET 2:		SUITE 500
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73116
		BUSINESS PHONE:		4052354546

	MAIL ADDRESS:	
		STREET 1:		3503 NW 63RD STREET
		STREET 2:		SUITE 500
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73116
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-10-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000060714</issuerCik>
        <issuerName>LSB INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>LXU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001423514</rptOwnerCik>
            <rptOwnerName>Foster Michael J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3503 NW 63RD ST, SUITE 500</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OKLAHOMA CITY</rptOwnerCity>
            <rptOwnerState>OK</rptOwnerState>
            <rptOwnerZipCode>73116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP/General Counsel/Sec</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-10-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>58090</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>518158</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents additional shares granted pursuant to previously reported restricted stock awards in respect of the satisfaction of performance conditions above the target performance level previously reported. Following satisfaction of the performance conditions, such restricted stock awards remain subject to the time-based vesting conditions set forth in the applicable award agreement and the Company's 2016 Long Term Incentive Plan, as amended and restated March 4, 2021. No consideration was paid for the issuance of the additional shares pursuant to the restricted stock award agreements.</footnote>
        <footnote id="F2">Includes shares received as a stock dividend paid on October 8, 2021, to all holders of record of common stock of the Company on September 24, 2021. The stock dividend is exempt from Section 16 of the Securities Exchange Act of 1934, as amended, pursuant to Rule 16a-9 thereunder.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael J. Foster</signatureName>
        <signatureDate>2021-10-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
