FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
TAYTON-MARTIN HELEN KATRINA
   2. Issuer Name and Ticker or Trading Symbol
Adaptimmune Therapeutics PLC [ADAP] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Business Officer
(Last)
(First)
(Middle)
C/O ADAPTIMMUNE THERAPEUTICS PLC,, 60 JUBILEE AVENUE, MILTON PARK		 3. Date of Earliest Transaction (Month/Day/Year)
03/03/2021
(Street)

ABINGDON, X0 OX14 4RX		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Ordinary Shares with a nominal value of GBP0.001 per share 03/03/2021   M   1,785,000 (1) A $ 0.157 (2) 1,800,000 (3) D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
TAYTON-MARTIN HELEN KATRINA
C/O ADAPTIMMUNE THERAPEUTICS PLC,
60 JUBILEE AVENUE, MILTON PARK
ABINGDON, X0 OX14 4RX		       Chief Business Officer  

Signatures

 /s/ Helen Tayton-Martin   03/03/2021
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The ordinary shares whose purchase is reported on this line were obtained from the exercise of share options that were granted on March 20, 2015. The ordinary shares continue to be held by the Reporting Person.
(2) The price reported in Column 4 of $0.157 per ordinary share is derived from the option purchase price paid on March 3, 2021 of GBP0.112 per ordinary share.
(3) The 1,800,000 ordinary shares reported in Column 5 include 1,785,000 ordinary shares reported in Column 4 as well as 15,000 ordinary shares held by the Reporting Person. The ordinary shares reported in Column 5 represent solely the ordinary shares beneficially owned by the Reporting Person. Additionally, the Reporting Person holds options covering an aggregate of 9,703,672 ordinary shares of the Issuer. Ordinary shares may be represented by American Depositary Shares (ADSs) with each ADS representing six ordinary shares.

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