<SEC-DOCUMENT>0001000697-26-000095.txt : 20260227
<SEC-HEADER>0001000697-26-000095.hdr.sgml : 20260227
<ACCEPTANCE-DATETIME>20260227193354
ACCESSION NUMBER:		0001000697-26-000095
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260225
FILED AS OF DATE:		20260227
DATE AS OF CHANGE:		20260227

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Carpio Robert L III
		CENTRAL INDEX KEY:			0002027463
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14010
		FILM NUMBER:		26702794

	MAIL ADDRESS:	
		STREET 1:		C/O WATERS CORPORATION
		STREET 2:		34 MAPLE STREET
		CITY:			MILFORD
		STATE:			MA
		ZIP:			01757

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WATERS CORP /DE/
		CENTRAL INDEX KEY:			0001000697
		STANDARD INDUSTRIAL CLASSIFICATION:	LABORATORY ANALYTICAL INSTRUMENTS [3826]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				133668640
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		34 MAPLE ST
		CITY:			MILFORD
		STATE:			MA
		ZIP:			01757
		BUSINESS PHONE:		5084782000

	MAIL ADDRESS:	
		STREET 1:		34 MAPLE STREET
		CITY:			MILFORD
		STATE:			MA
		ZIP:			01757

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WCD INVESTORS INC /DE/
		DATE OF NAME CHANGE:	19960605
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-02-25</periodOfReport>

    <issuer>
        <issuerCik>0001000697</issuerCik>
        <issuerName>WATERS CORP /DE/</issuerName>
        <issuerTradingSymbol>WAT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002027463</rptOwnerCik>
            <rptOwnerName>Carpio Robert L III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O WATERS CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>34 MAPLE STREET</rptOwnerStreet2>
            <rptOwnerCity>MILFORD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01757</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>SVP Waters Analytical Sciences</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-02-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>997</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3615</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>319.44</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2026-02-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4884</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2036-02-25</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4884</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4884</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units (&quot;RSUs&quot;), which will vest in four equal annual installments, with the first such installment vesting on February 25, 2027, subject to the Reporting Person's continued service with the Issuer on each such vesting date. The RSUs are convertible into shares of the Issuer's common stock on a one-to-one basis upon vesting and settlement.</footnote>
        <footnote id="F2">The shares of common stock underlying this stock option will vest and become exercisable in four equal annual installments, with the first such installment vesting and becoming exercisable on February 25, 2027, subject to the Reporting Person's continued service with the Issuer on each such vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael Lynn, attorney-in-fact for Robert L. Carpio III</signatureName>
        <signatureDate>2026-02-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
