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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1. Name and Address of Reporting Person * DOYLE WILLIAM F   2. Issuer Name and Ticker or Trading Symbol Novocure Ltd [NVCR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Chairman (Last) (First) (Middle) C/O NOVOCURE INC.,, 20 VALLEY STREAM PARKWAY, SUITE 300 3. Date of Earliest Transaction (Month/Day/Year) 05/04/2018 (Street) MALVERN, PA 19355 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 05/04/2018   F   28,666 (1) (2) D $ 27.892 998,355 D   Ordinary Shares 05/07/2018   F   28,804 (1) (2) D $ 28.009 969,551 D   Ordinary Shares               43,000 I WFD Ventures Fund II, L.P. (3) Ordinary Shares               625,954 I WFD-GP II, LLC (3)

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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
DOYLE WILLIAM F C/O NOVOCURE INC., 20 VALLEY STREAM PARKWAY, SUITE 300 MALVERN, PA 19355	X		Executive Chairman

Signatures

/s/ William F. Doyle		05/08/2018
**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)	293,840 restricted stock units ("RSUs") vested on May 2, 2018. The issuer released one-fifth of the RSUs (58,768 RSUs) as of May 3, 2018 (previously reported on a Form 4 filed on May 4, 2018), released an additional one-fifth of the RSUs as of May 4, 2018 and one-fifth of the RSUs as of May 7, 2018, and will release the other two-fifths on two separate dates hereafter. Mr. Doyle has sold sufficient RSUs to cover the tax liability. After the 293,840 RSUs have been released, one-half of the remaining RSUs is scheduled to vest on each of May 2, 2019 and May 2, 2020, subject to Mr. Doyle's continued employment through such dates, pursuant to his Restricted Share Unit Award Notice with NovoCure Limited, dated as of May 2, 2017.
(2)	Represents the sale of shares to cover tax withholding obligations in connection with the settlement and release of fully-vested restricted stock units ("RSUs") granted by the issuer to the reporting person and reported on a Form 4 filed on May 4, 2017.
(3)	Mr. Doyle is the Managing Director of WFD Ventures LLC, the sole member of WFD-GP II LLC, which is the general partner of WFD Ventures Fund II, L.P. Mr. Doyle disclaims beneficial ownership of the reported shares except to the extent of his pecuniary interest.

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