<SEC-DOCUMENT>0001104659-17-067357.txt : 20171109
<SEC-HEADER>0001104659-17-067357.hdr.sgml : 20171109
<ACCEPTANCE-DATETIME>20171109160320
ACCESSION NUMBER:		0001104659-17-067357
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20171107
FILED AS OF DATE:		20171109
DATE AS OF CHANGE:		20171109

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Franklin Robert R Jr
		CENTRAL INDEX KEY:			0001720348

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38280
		FILM NUMBER:		171190703

	MAIL ADDRESS:	
		STREET 1:		9 GREENWAY PLAZA, SUITE 110
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77046

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CBTX, Inc.
		CENTRAL INDEX KEY:			0001473844
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				208339782
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		9 GREENWAY PLAZA, SUITE 110
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77046
		BUSINESS PHONE:		(713) 210-7600

	MAIL ADDRESS:	
		STREET 1:		9 GREENWAY PLAZA, SUITE 110
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77046

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CBFH, Inc.
		DATE OF NAME CHANGE:	20091005
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-11-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001473844</issuerCik>
        <issuerName>CBTX, Inc.</issuerName>
        <issuerTradingSymbol>CBTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001720348</rptOwnerCik>
            <rptOwnerName>Franklin Robert R Jr</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9 GREENWAY PLAZA, SUITE 110</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77046</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman, President &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-11-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1387</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>26.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>245217</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-11-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>30000</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>275217</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of common stock, par value $0.01 per share (&quot;Common Stock&quot;), of the issuer purchased through a directed share program in connection with the initial public offering of the Common Stock.</footnote>
        <footnote id="F2">Represents restricted shares of Common Stock that will vest in five equal annual installments beginning on November 7, 2018, subject to the reporting person's continued employment with the issuer on such dates.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert R. Franklin, Jr.</signatureName>
        <signatureDate>2017-11-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
