<SEC-DOCUMENT>0001209191-21-018557.txt : 20210308
<SEC-HEADER>0001209191-21-018557.hdr.sgml : 20210308
<ACCEPTANCE-DATETIME>20210308162646
ACCESSION NUMBER:		0001209191-21-018557
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210304
FILED AS OF DATE:		20210308
DATE AS OF CHANGE:		20210308

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Tifford Gail B
		CENTRAL INDEX KEY:			0001712872

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16769
		FILM NUMBER:		21722302

	MAIL ADDRESS:	
		STREET 1:		901 S. CENTRAL EXPRESSWAY
		CITY:			RICHARDSON
		STATE:			TX
		ZIP:			75134

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WW INTERNATIONAL, INC.
		CENTRAL INDEX KEY:			0000105319
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PERSONAL SERVICES [7200]
		IRS NUMBER:				116040273
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			0101

	BUSINESS ADDRESS:	
		STREET 1:		675 AVENUE OF THE AMERICAS
		STREET 2:		6TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		2125892700

	MAIL ADDRESS:	
		STREET 1:		675 AVENUE OF THE AMERICAS
		STREET 2:		6TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WEIGHT WATCHERS INTERNATIONAL INC
		DATE OF NAME CHANGE:	19991123
</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>2021-03-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000105319</issuerCik>
        <issuerName>WW INTERNATIONAL, INC.</issuerName>
        <issuerTradingSymbol>WW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001712872</rptOwnerCik>
            <rptOwnerName>Tifford Gail B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>675 AVENUE OF THE AMERICAS</rptOwnerStreet1>
            <rptOwnerStreet2>6TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10010</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Brand Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-03-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2757</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>33.97</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8839</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.93 to $34.05, inclusive. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Roxanne Tingir, as Attorney-in-Fact for Gail B. Tifford</signatureName>
        <signatureDate>2021-03-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
