<SEC-DOCUMENT>0001104659-18-050188.txt : 20180807
<SEC-HEADER>0001104659-18-050188.hdr.sgml : 20180807
<ACCEPTANCE-DATETIME>20180807171438
ACCESSION NUMBER:		0001104659-18-050188
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180806
FILED AS OF DATE:		20180807
DATE AS OF CHANGE:		20180807

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Amado Rafael
		CENTRAL INDEX KEY:			0001662119

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37368
		FILM NUMBER:		18999059

	MAIL ADDRESS:	
		STREET 1:		5 ASHWOOD LANE
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19435

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Adaptimmune Therapeutics PLC
		CENTRAL INDEX KEY:			0001621227
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			X0
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		60 JUBILEE AVENUE
		STREET 2:		MILTON PARK
		CITY:			ABINGDON, OXFORDSHIRE
		STATE:			X0
		ZIP:			OX14 4RX
		BUSINESS PHONE:		44 1235 430000

	MAIL ADDRESS:	
		STREET 1:		60 JUBILEE AVENUE
		STREET 2:		MILTON PARK
		CITY:			ABINGDON, OXFORDSHIRE
		STATE:			X0
		ZIP:			OX14 4RX

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Adaptimmune Ltd
		DATE OF NAME CHANGE:	20141001
</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>2018-08-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001621227</issuerCik>
        <issuerName>Adaptimmune Therapeutics PLC</issuerName>
        <issuerTradingSymbol>ADAP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001662119</rptOwnerCik>
            <rptOwnerName>Amado Rafael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5 ASHWOOD LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MALVERN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19436</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President, R &amp; D</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option to purchase Ordinary Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.0013</value>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-08-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>678720</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>678720</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>678720</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of $U.S. 1.29679 - GBP1.00.  The actual exercise price will be the pounds sterling amount.</footnote>
        <footnote id="F2">Exercisable as to 169,680 Ordinary Shares on August 6, 2019 and will be exercisable as to the remainder in annual installments of 169,680 Ordinary Shares on the sixth of each August from August 6, 2020 through August 6, 2022.</footnote>
        <footnote id="F3">The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Rafael Amado</signatureName>
        <signatureDate>2018-08-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
