<SEC-DOCUMENT>0000899243-18-011116.txt : 20180502
<SEC-HEADER>0000899243-18-011116.hdr.sgml : 20180502
<ACCEPTANCE-DATETIME>20180502161639
ACCESSION NUMBER:		0000899243-18-011116
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180430
FILED AS OF DATE:		20180502
DATE AS OF CHANGE:		20180502

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DOVER Corp
		CENTRAL INDEX KEY:			0000029905
		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION, MINING & MATERIALS HANDLING MACHINERY & EQUIP [3530]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38441
		FILM NUMBER:		18799807

	BUSINESS ADDRESS:	
		STREET 1:		3005 HIGHLAND PARKWAY
		STREET 2:		SUITE 200
		CITY:			DOWNERS GROVE
		STATE:			IL
		ZIP:			60515
		BUSINESS PHONE:		(630) 541-1540

	MAIL ADDRESS:	
		STREET 1:		3005 HIGHLAND PARKWAY
		STREET 2:		SUITE 200
		CITY:			DOWNERS GROVE
		STATE:			IL
		ZIP:			60515

	FORMER NAME:	
		FORMER CONFORMED NAME:	DOVER CORP
		DATE OF NAME CHANGE:	19920703

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Apergy Corp
		CENTRAL INDEX KEY:			0001723089
		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION, MINING & MATERIALS HANDLING MACHINERY & EQUIP [3530]
		IRS NUMBER:				823066826
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2445 TECHNOLOGY FOREST RD
		STREET 2:		SUITE 900
		CITY:			THE WOODLANDS
		STATE:			TX
		ZIP:			77381
		BUSINESS PHONE:		(630)541-1540

	MAIL ADDRESS:	
		STREET 1:		C/O DOVER CORPORATION
		STREET 2:		3005 HIGHLAND PARKWAY
		CITY:			DOWNERS GROVE
		STATE:			IL
		ZIP:			60515

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Wellsite Corp
		DATE OF NAME CHANGE:	20171116
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-04-30</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001723089</issuerCik>
        <issuerName>Apergy Corp</issuerName>
        <issuerTradingSymbol>APY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000029905</rptOwnerCik>
            <rptOwnerName>DOVER Corp</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3005 HIGHLAND PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DOWNERS GROVE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60515</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-04-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">As of the date of this report, Dover Corporation (&quot;Parent&quot;) has announced its intention to spin-off Apergy Corporation (&quot;APY&quot;) from Parent.  The record date for the distribution of all of the APY common stock owned by Parent to the holders of Parent common stock was April 30, 2018.  Parent is expected to distribute all of the common stock of APY on May 9, 2018.</footnote>
        <footnote id="F2">The reported disposition represents 100% of Parent's equity holdings in APY on the record date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ivonne M. Cabrera Senior Vice President, General Counsel &amp; Secretary</signatureName>
        <signatureDate>2018-05-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
