<SEC-DOCUMENT>0001104659-18-045827.txt : 20180718
<SEC-HEADER>0001104659-18-045827.hdr.sgml : 20180718
<ACCEPTANCE-DATETIME>20180718192146
ACCESSION NUMBER:		0001104659-18-045827
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180716
FILED AS OF DATE:		20180718
DATE AS OF CHANGE:		20180718

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Bender Steven
		CENTRAL INDEX KEY:			0001701687

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38390
		FILM NUMBER:		18959281

	MAIL ADDRESS:	
		STREET 1:		ONE GREENWAY PLAZA
		STREET 2:		SUITE 200
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77046

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cactus, Inc.
		CENTRAL INDEX KEY:			0001699136
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL & GAS FILED MACHINERY & EQUIPMENT [3533]
		IRS NUMBER:				352586106
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		920 MEMORIAL CITY WAY
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77024
		BUSINESS PHONE:		713-626-8800

	MAIL ADDRESS:	
		STREET 1:		920 MEMORIAL CITY WAY
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77024
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
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<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-07-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001699136</issuerCik>
        <issuerName>Cactus, Inc.</issuerName>
        <issuerTradingSymbol>WHD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001701687</rptOwnerCik>
            <rptOwnerName>Bender Steven</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>920 MEMORIAL CITY WAY, SUITE 300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77024</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP of Operations</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-07-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                <sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
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            <transactionDate>
                <value>2018-07-16</value>
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                <transactionCode>D</transactionCode>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
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                <footnoteId id="F3"/>
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            <transactionDate>
                <value>2018-07-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                <value></value>
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                <transactionShares>
                    <value>126806</value>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>126806</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        <derivativeTransaction>
            <securityTitle>
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                <footnoteId id="F3"/>
            </securityTitle>
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            <transactionDate>
                <value>2018-07-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>126806</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>32.0862</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F4"/>
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            <expirationDate>
                <footnoteId id="F4"/>
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                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>126806</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These securities were acquired as part of the closing of the Issuer's most recent public equity offering.</footnote>
        <footnote id="F2">These securities were disposed as part of the closing of the Issuer's most recent public equity offering.</footnote>
        <footnote id="F3">&quot;Units&quot; mean ownership interests in Cactus Wellhead, LLC (&quot;Cactus LLC&quot;). The Issuer is the sole managing member of Cactus LLC.</footnote>
        <footnote id="F4">The first amended and restated limited liability company operating agreement of Cactus LLC provides the holders of Units with certain rights to cause Cactus LLC to acquire all or at least a minimum portion of their Units for, at Cactus LLC's election, (x) shares of Class A Common Stock at a redemption ratio of one share of Class A Common Stock for each Unit redeemed, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions, or (y) an equivalent amount of cash.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Steven Bender, by Ike Smith as Attorney-in-Fact</signatureName>
        <signatureDate>2018-07-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
