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, Section 17(a) of the Public Utility Holding Company Act of 1935 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 * Sigal Charles Elliott   2. Issuer Name and Ticker or Trading Symbol Adaptimmune Therapeutics PLC [ADAP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 32 BREARLY ROAD 3. Date of Earliest Transaction (Month/Day/Year) 05/16/2016 (Street) PRINCETON, NJ 08540 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 (1) 05/16/2016   P   15,000 (2) A $ 1.5 (3) 269,100 (4) I Shares held by Sigal Family Investments, LLC Ordinary Shares with a nominal value of GBP0.001 per share (1) 05/17/2016   P   15,000 (2) A $ 1.53 (5) 284,100 (6) I Shares held by Sigal Family Investments, LLC Ordinary Shares with a nominal value of GBP0.001 per share (1) 05/18/2016   P   15,000 (2) A $ 1.55 (7) 299,100 (8) I Shares held by Sigal Family Investments, LLC Ordinary Shares with a nominal value of GBP0.001 per share               52,938 (9) D

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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
Sigal Charles Elliott 32 BREARLY ROAD PRINCETON, NJ 08540	X

Signatures

/s/ Charles Elliott Sigal		05/18/2016
**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)	Dr. Sigal is a manager of Sigal Family Investments, LLC. Dr. Sigal may be deemed to have voting and investment power over the shares held by Sigal Family Investments, LLC. Dr. Sigal disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein.
(2)	The 15,000 Ordinary Shares are represented by 2,500 American Depositary Shares ("ADSs") which are held by Sigal Family Investments, LLC. Each ADS represents six Ordinary Shares of Adaptimmune Therapeutics plc.
(3)	The price of $1.50 per Ordinary Share was derived from the purchase price paid on May 16, 2016, of $8.98 per ADS, divided by six.
(4)	The 269,100 Ordinary Shares comprise (i) 254,100 Ordinary Shares, and (ii) 15,000 Ordinary Shares represented by 2,500 ADSs.
(5)	The price of $1.53 per Ordinary Share was derived from the purchase price paid on May 17, 2016, of $9.18 per ADS, divided by six.
(6)	The 284,100 Ordinary Shares comprise (i) 254,100 Ordinary Shares, and (ii) 30,000 Ordinary Shares represented by 5,000 ADSs.
(7)	The price of $1.55 per Ordinary Share was derived from the purchase price paid on May 18, 2016, of $9.30 per ADS, divided by six.
(8)	The 299,100 Ordinary Shares comprise (i) 254,100 Ordinary Shares, and (ii) 45,000 Ordinary Shares represented by 7,500 ADSs.
(9)	The 52,938 Ordinary Shares are represented by 8,823 ADSs.

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