<SEC-DOCUMENT>0001645113-19-000010.txt : 20191119
<SEC-HEADER>0001645113-19-000010.hdr.sgml : 20191119
<ACCEPTANCE-DATETIME>20191119162421
ACCESSION NUMBER:		0001645113-19-000010
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191115
FILED AS OF DATE:		20191119
DATE AS OF CHANGE:		20191119

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEUNG GABRIEL
		CENTRAL INDEX KEY:			0001236183

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37565
		FILM NUMBER:		191231531

	MAIL ADDRESS:	
		STREET 1:		C/O PERNIX THERAPEUTICS HOLDINGS, INC.
		STREET 2:		10 NORTH PARK PLACE, SUITE 201
		CITY:			MORRISTOWN
		STATE:			NJ
		ZIP:			07960

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NovoCure Ltd
		CENTRAL INDEX KEY:			0001645113
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		NO. 4 THE FORUM
		STREET 2:		GRENVILLE STREET
		CITY:			ST. HELIER
		STATE:			Y9
		ZIP:			JE2 4UF
		BUSINESS PHONE:		44 (0)15 3475 6700

	MAIL ADDRESS:	
		STREET 1:		NO. 4 THE FORUM
		STREET 2:		GRENVILLE STREET
		CITY:			ST. HELIER
		STATE:			Y9
		ZIP:			JE2 4UF

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Novocure Ltd
		DATE OF NAME CHANGE:	20150615
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>FORM 4
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        <issuerCik>0001645113</issuerCik>
        <issuerName>NovoCure Ltd</issuerName>
        <issuerTradingSymbol>NVCR</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>LEUNG GABRIEL</rptOwnerName>
        </reportingOwnerId>
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            <rptOwnerStreet1>C/O NOVOCURE INC.</rptOwnerStreet1>
            <rptOwnerStreet2>20 VALLEY STREAM PARKWAY, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>MALVERN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19355</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isDirector>1</isDirector>
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            <isTenPercentOwner>0</isTenPercentOwner>
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            <otherText></otherText>
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            <transactionDate>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
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                    <footnoteId id="F1"/>
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                <transactionPricePerShare>
                    <value>7.03</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
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            <transactionDate>
                <value>2019-11-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>1700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>82.519</value>
                    <footnoteId id="F5"/>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>73061</value>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2019-11-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3203</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>83.511</value>
                    <footnoteId id="F6"/>
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                <transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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            <securityTitle>
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            <transactionDate>
                <value>2019-11-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>354</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>84.004</value>
                    <footnoteId id="F7"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                <value>Ordinary Shares</value>
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            <transactionDate>
                <value>2019-11-18</value>
            </transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                    <footnoteId id="F1"/>
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                <transactionPricePerShare>
                    <value>7.03</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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            <securityTitle>
                <value>Ordinary Shares</value>
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            <transactionDate>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Options to Buy Ordinary Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.44</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-11-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>4743</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <value>2021-09-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4743.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Options to Buy Ordinary Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.03</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-11-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5257</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <value>2023-02-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5257.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>69214</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Options to Buy Ordinary Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.03</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-11-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <value>2023-02-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>59214</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung.</footnote>
        <footnote id="F2">On November 15, 2019, pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung, Mr. Leung sold 1,500 shares in multiple trades at prices ranging from $81.98 to $82.92.  The price reported above reflects the weighted average sale price.  Mr. Leung hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer upon request, full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F3">On November 15, 2019, pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung, Mr. Leung sold 2,800 shares in multiple trades at prices ranging from $82.98 to $83.94.  The price reported above reflects the weighted average sale price.  Mr. Leung hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer upon request, full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F4">On November 15, 2019, pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung, Mr. Leung sold 443 shares in multiple trades at prices ranging from $84.00 to $84.05.  The price reported above reflects the weighted average sale price.  Mr. Leung hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer upon request, full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F5">On November 15, 2019, pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung, Mr. Leung sold 1,700 shares in multiple trades at prices ranging from $81.98 to $82.91.  The price reported above reflects the weighted average sale price.  Mr. Leung hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer upon request, full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F6">On November 15, 2019, pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung, Mr. Leung sold 3,203 shares in multiple trades at prices ranging from $82.99 to $83.94.  The price reported above reflects the weighted average sale price.  Mr. Leung hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer upon request, full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F7">On November 15, 2019, pursuant to a Rule 10b5-1 trading plan adopted by Mr. Leung, Mr. Leung sold 354 shares in multiple trades at prices ranging from $84.00 to $84.01.  The price reported above reflects the weighted average sale price.  Mr. Leung hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer upon request, full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F8">Fully vested as of the date hereof.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Todd Longsworth, Attorney in fact for Kinyip Gabriel Leung</signatureName>
        <signatureDate>2019-11-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
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