<SEC-DOCUMENT>0001104659-20-004422.txt : 20200115
<SEC-HEADER>0001104659-20-004422.hdr.sgml : 20200115
<ACCEPTANCE-DATETIME>20200115200243
ACCESSION NUMBER:		0001104659-20-004422
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200113
FILED AS OF DATE:		20200115
DATE AS OF CHANGE:		20200115

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TAYTON-MARTIN HELEN KATRINA
		CENTRAL INDEX KEY:			0001661780

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37368
		FILM NUMBER:		20529271

	MAIL ADDRESS:	
		STREET 1:		BROCK HOUSE, SHEEPDROVE
		STREET 2:		LAMBOURN
		CITY:			HUNGERFORD, BERKS
		STATE:			X0
		ZIP:			RG17 7XA

	FORMER NAME:	
		FORMER CONFORMED NAME:	Tayton-Martin Helena Katrina
		DATE OF NAME CHANGE:	20151222

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>2020-01-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001661780</rptOwnerCik>
            <rptOwnerName>TAYTON-MARTIN HELEN KATRINA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ADAPTIMMUNE THERAPEUTICS PLC,</rptOwnerStreet1>
            <rptOwnerStreet2>60 JUBILEE AVENUE, MILTON PARK</rptOwnerStreet2>
            <rptOwnerCity>ABINGDON</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>OX14 4RX</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Business Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>American Depositary Shares</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2020-01-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.00</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>American Depositary Shares</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2020-01-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.00</value>
                    <footnoteId id="F3"/>
                </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">The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 28, 2019.</footnote>
        <footnote id="F2">These ADSs were sold in multiple transactions at a price of $4.00. Upon request, the reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at this price in this footnote.</footnote>
        <footnote id="F3">These ADSs were sold in multiple transactions at a price of $5.00. Upon request, the reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at this price in this footnote.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Helen Tayton-Martin</signatureName>
        <signatureDate>2020-01-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
