Ownership Submission

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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3235-0287

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

Sonsini Peter W.

2. Issuer Name and Ticker or Trading Symbol
Adaptimmune Therapeutics PLC [ADAP]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	__X__ 10% Owner
_____ Officer (give title below)	_____ Other (specify below)

(Last)

(First)

(Middle)

2855 SAND HILL ROAD

3. Date of Earliest Transaction (Month/Day/Year)
03/21/2018

(Street)

MENLO PARK, CA 94025

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)
1.Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares with a nominal value of 0.001 GBP per share ⁽¹⁾	03/21/2018		P		104,844 ⁽¹⁾	A	$ 1.8105 ⁽²⁾	72,243,844 ⁽¹⁾	I	See Note 3 ⁽³⁾
Ordinary Shares with a nominal value of 0.001 GBP per share ⁽¹⁾	03/22/2018		P		869,574 ⁽¹⁾	A	$ 1.904 ⁽⁴⁾	73,113,418 ⁽¹⁾	I	See Note 3 ⁽³⁾
Ordinary Shares with a nominal value of 0.001 GBP per share ⁽¹⁾	03/23/2018		P		294,090 ⁽¹⁾	A	$ 1.9462 ⁽⁵⁾	73,407,508 ⁽¹⁾	I	See Note 3 ⁽³⁾

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

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

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Sonsini Peter W. 2855 SAND HILL ROAD MENLO PARK, CA 94025		X

Signatures

/s/ Sasha Keough, attorney-in-fact		03/23/2018
^**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 are represented by American Depositary Shares ("ADSs") and are held of record by New Enterprise Associates 14, L.P. ("NEA 14"). NEA 14 holds these ordinary shares in the form of ADSs. Each ADS represents six ordinary shares of Adaptimmune Therapeutics plc. The ordinary shares reported in column 5 are represented by ADSs.
(2)	The price reported in Column 4 of $1.8105 per ordinary share is a weighted average price derived from the weighted average price of $10.8628 per ADS, divided by six. These ADSs were purchased in multiple transactions at prices ranging from $10.29 to $11.15 per ADS, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of ADSs purchased at each separate price within the range set forth in this footnote (2) to this Form 4.
(3)	The Reporting Person is a director of NEA 14 GP, LTD, which is the sole general partner of NEA Partners 14, L.P. ("NEA Partners 14"). NEA Partners 14 is the sole general partner of NEA 14, which is the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership, within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the NEA 14 shares in which the Reporting Person has no pecuniary interest.
(4)	The price reported in Column 4 of $1.904 per ordinary share is a weighted average price derived from the weighted average price of $11.4241 per ADS, divided by six. These ADSs were purchased in multiple transactions at prices ranging from $10.93 to $11.84 per ADS, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of ADSs purchased at each separate price within the range set forth in this footnote (4) to this Form 4.
(5)	The price reported in Column 4 of $1.9462 per ordinary share is a weighted average price derived from the weighted average price of $11.6773 per ADS, divided by six. These ADSs were purchased in multiple transactions at prices ranging from $11.41 to $12 per ADS, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of ADSs purchased at each separate price within the range set forth in this footnote (5) to this Form 4.

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