<SEC-DOCUMENT>0001561518-19-000002.txt : 20190212
<SEC-HEADER>0001561518-19-000002.hdr.sgml : 20190212
<ACCEPTANCE-DATETIME>20190212153343
ACCESSION NUMBER:		0001561518-19-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190208
FILED AS OF DATE:		20190212
DATE AS OF CHANGE:		20190212

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Vacher Kate
		CENTRAL INDEX KEY:			0001561518

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31909
		FILM NUMBER:		19590432

	MAIL ADDRESS:	
		STREET 1:		ASPEN INSURANCE HOLDINGS LIMITED
		STREET 2:		141 FRONT STREET
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM19

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ASPEN INSURANCE HOLDINGS LTD
		CENTRAL INDEX KEY:			0001267395
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		141 FRONT STREET
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM 19
		BUSINESS PHONE:		1 441 295 8201

	MAIL ADDRESS:	
		STREET 1:		141 FRONT STREET
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM 19
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_155000360738413.xml
<DESCRIPTION>FORM 4
<TEXT>
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        <issuerName>ASPEN INSURANCE HOLDINGS LTD</issuerName>
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            <rptOwnerStreet2>141 FRONT STREET</rptOwnerStreet2>
            <rptOwnerCity>HAMILTON</rptOwnerCity>
            <rptOwnerState>D0</rptOwnerState>
            <rptOwnerZipCode>HM19</rptOwnerZipCode>
            <rptOwnerStateDescription>BERMUDA</rptOwnerStateDescription>
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            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO, ABL</officerTitle>
            <otherText></otherText>
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            <transactionDate>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2019-02-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
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            <transactionAmounts>
                <transactionShares>
                    <value>146</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>42.56</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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        <nonDerivativeTransaction>
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                <value>Ordinary Shares</value>
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            <transactionDate>
                <value>2019-02-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
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                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>1111</value>
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            </securityTitle>
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            <transactionDate>
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                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
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                    <value>627</value>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            </exerciseDate>
            <expirationDate>
                <footnoteId id="F7"/>
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                <underlyingSecurityTitle>
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        <derivativeTransaction>
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            <conversionOrExercisePrice>
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            <transactionDate>
                <value>2019-02-08</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
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                    <value>1095</value>
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                <transactionPricePerShare>
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            <exerciseDate>
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        <derivativeTransaction>
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                <value>Restricted Share Units (2018 Grant)</value>
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            <exerciseDate>
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            <expirationDate>
                <footnoteId id="F9"/>
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                    <value>2416</value>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Share Units (2017 Grant)</value>
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            <conversionOrExercisePrice>
                <footnoteId id="F6"/>
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                <value>2019-02-10</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>1111</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F10"/>
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            <expirationDate>
                <footnoteId id="F10"/>
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                <underlyingSecurityTitle>
                    <value>Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1111.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>1112</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Ordinary shares acquired upon mandatory conversion of previously granted Restricted Share Units.</footnote>
        <footnote id="F2">Ordinary shares withheld in order to satisfy tax liability in connection with previously granted 2015 Part Bonus Restricted Share Units.</footnote>
        <footnote id="F3">Ordinary shares withheld in order to satisfy tax liability in connection with previously granted 2016 Restricted Share Units.</footnote>
        <footnote id="F4">Ordinary shares withheld in order to satisfy tax liability in connection with previously granted 2018 Restricted Share Units.</footnote>
        <footnote id="F5">Ordinary shares withheld in order to satisfy tax liability in connection with previously granted 2017 Restricted Share Units.</footnote>
        <footnote id="F6">Each Restricted Share Unit represents the right to receive one share of the Issuer's Ordinary Shares.</footnote>
        <footnote id="F7">Represents a portion of the Reporting Person's annual bonus for 2015 paid in Restricted Share Units. The Restricted Share Units were granted on February 8, 2016. One-third of the Restricted Share Units vested annually on the anniversary of the grant date over a three-year period, in each case subject to the Reporting Person's continued service, unless terminated without cause or by the Reporting Person for good reason. Upon vesting of the Restricted Share Units, the Reporting Person shall be entitled to receive a number of Ordinary Shares equal to the number of Restricted Share Units then vesting.</footnote>
        <footnote id="F8">Represents 2016 Restricted Share Units granted on February 8, 2016 under our 2013 Share Incentive Plan, as amended. One-third of the 2016 Restricted Share Units vested annually on the anniversary of the grant date over a three-year period, in each case subject to the Reporting Person's continued service. Upon vesting of the 2016 Restricted Share Units, the Reporting Person shall be entitled to receive a number of Ordinary Shares equal to the number of Restricted Share Units then vesting.</footnote>
        <footnote id="F9">Represents 2018 Restricted Share Units granted on February 9, 2018 under our 2013 Share Incentive Plan, as amended. One-third of the 2018 Restricted Share Units vests annually on the anniversary of the grant date over a three-year period, in each case subject to the Reporting Person's continued service. Upon vesting of the 2018 Restricted Share Units, the Reporting Person shall be entitled to receive a number of Ordinary Shares equal to the number of Restricted Share Units then vesting.</footnote>
        <footnote id="F10">Represents 2017 Restricted Share Units granted on February 10, 2017 under our 2013 Share Incentive Plan. One-third of the 2017 Restricted Share Units vests annually on the anniversary of the grant date over a three-year period, in each case subject to the Reporting Person's continued service. Upon vesting of the 2017 Restricted Share Units, the Reporting Person shall be entitled to receive a number of Ordinary Shares equal to the number of Restricted Share Units then vesting.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Silvia Martinez as Attorney-in-fact for Kathryn Vacher</signatureName>
        <signatureDate>2019-02-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
