<SEC-DOCUMENT>0001562180-22-008148.txt : 20221208
<SEC-HEADER>0001562180-22-008148.hdr.sgml : 20221208
<ACCEPTANCE-DATETIME>20221208083804
ACCESSION NUMBER:		0001562180-22-008148
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20221205
FILED AS OF DATE:		20221208
DATE AS OF CHANGE:		20221208

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Green Eric Mark
		CENTRAL INDEX KEY:			0001336007

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08036
		FILM NUMBER:		221451483

	MAIL ADDRESS:	
		STREET 1:		530 HERMAN O. WEST DRIVE
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WEST PHARMACEUTICAL SERVICES INC
		CENTRAL INDEX KEY:			0000105770
		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED RUBBER PRODUCTS, NEC [3060]
		IRS NUMBER:				231210010
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		530 HERMAN O. WEST DRIVE
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341
		BUSINESS PHONE:		6105942900

	MAIL ADDRESS:	
		STREET 1:		530 HERMAN O. WEST DRIVE
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WEST CO INC
		DATE OF NAME CHANGE:	19990405
</SEC-HEADER>
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        <issuerName>WEST PHARMACEUTICAL SERVICES INC</issuerName>
        <issuerTradingSymbol>WST</issuerTradingSymbol>
    </issuer>

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        <reportingOwnerId>
            <rptOwnerCik>0001336007</rptOwnerCik>
            <rptOwnerName>Green Eric Mark</rptOwnerName>
        </reportingOwnerId>
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            <rptOwnerStreet1>530 HERMAN O. WEST DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>EXTON</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19341</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>President &amp; CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                    <value>238.8268</value>
                    <footnoteId id="F5"/>
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                    <footnoteId id="F2"/>
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                <transactionPricePerShare>
                    <value>239.6972</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
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                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>240.7328</value>
                    <footnoteId id="F7"/>
                </transactionPricePerShare>
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            </transactionDate>
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                <equitySwapInvolved>false</equitySwapInvolved>
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                <transactionPricePerShare>
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                    <footnoteId id="F8"/>
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                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>57.38</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-12-05</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <value>2025-04-24</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000.00</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>248132.00</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The shares reported were acquired by the Reporting Person from exercising a stock option pursuant to Rule 10b5-1 Trading Plan. The purchase and sale reported on this Form 4 was completed pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on 9/14/2022.</footnote>
        <footnote id="F2">This transaction was effective pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on 9/14/2022. The Rule 10b5-1 trading plan, which was structured to include several sale periods, was established as part of the Reporting Person's long-term strategy for asset diversification and financial, retirement, estate and tax planning activities over a period of time.</footnote>
        <footnote id="F3">The price reported in Column 4 is an average price. These shares were purchased in multiple transactions at prices ranging from $236.255 to $237.245, inclusive. The reporting person undertakes to provide to West Pharmaceutical Services, Inc., any security holder of West Pharmaceutical Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range in this footnote.</footnote>
        <footnote id="F4">The price reported in Column 4 is an average price. These shares were purchased in multiple transactions at prices ranging from $237.255 to $238.21, inclusive. The reporting person undertakes to provide to West Pharmaceutical Services, Inc., any security holder of West Pharmaceutical Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range in this footnote.</footnote>
        <footnote id="F5">The price reported in Column 4 is an average price. These shares were purchased in multiple transactions at prices ranging from $238.26 to $239.25, inclusive. The reporting person undertakes to provide to West Pharmaceutical Services, Inc., any security holder of West Pharmaceutical Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range in this footnote.</footnote>
        <footnote id="F6">The price reported in Column 4 is an average price. These shares were purchased in multiple transactions at prices ranging from $239.26 to $240.25, inclusive. The reporting person undertakes to provide to West Pharmaceutical Services, Inc., any security holder of West Pharmaceutical Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range in this footnote.</footnote>
        <footnote id="F7">The price reported in Column 4 is an average price. These shares were purchased in multiple transactions at prices ranging from $240.29 to $241.27, inclusive. The reporting person undertakes to provide to West Pharmaceutical Services, Inc., any security holder of West Pharmaceutical Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range in this footnote.</footnote>
        <footnote id="F8">The price reported in Column 4 is an average price. These shares were purchased in multiple transactions at prices ranging from $241.33 to $241.56, inclusive. The reporting person undertakes to provide to West Pharmaceutical Services, Inc., any security holder of West Pharmaceutical Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range in this footnote.</footnote>
        <footnote id="F9">This option is fully vested.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Ryan Metz as Agent for Eric M. Green</signatureName>
        <signatureDate>2022-12-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
