<SEC-DOCUMENT>0001393905-18-000001.txt : 20180104
<SEC-HEADER>0001393905-18-000001.hdr.sgml : 20180104
<ACCEPTANCE-DATETIME>20180104161511
ACCESSION NUMBER:		0001393905-18-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180103
FILED AS OF DATE:		20180104
DATE AS OF CHANGE:		20180104

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PORTAGE BIOTECH INC.
		CENTRAL INDEX KEY:			0001095435
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		STATE OF INCORPORATION:			A6
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38080
		FILM NUMBER:		18510283

	BUSINESS ADDRESS:	
		STREET 1:		47 AVENUE ROAD
		STREET 2:		SUITE 200
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5R 2G3
		BUSINESS PHONE:		416-929-1806

	MAIL ADDRESS:	
		STREET 1:		47 AVENUE ROAD
		STREET 2:		SUITE 200
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5R 2G3

	FORMER NAME:	
		FORMER CONFORMED NAME:	BONTAN CORP INC
		DATE OF NAME CHANGE:	20030421

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEALCHECK COM INC
		DATE OF NAME CHANGE:	19990921

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Biohaven Pharmaceutical Holding Co Ltd.
		CENTRAL INDEX KEY:			0001689813
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D8
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		234 CHURCH STREET, SUITE 304
		CITY:			NEW HAVEN
		STATE:			CT
		ZIP:			06510
		BUSINESS PHONE:		203-404-0410

	MAIL ADDRESS:	
		STREET 1:		234 CHURCH STREET, SUITE 304
		CITY:			NEW HAVEN
		STATE:			CT
		ZIP:			06510
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-01-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001689813</issuerCik>
        <issuerName>Biohaven Pharmaceutical Holding Co Ltd.</issuerName>
        <issuerTradingSymbol>BHVN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001095435</rptOwnerCik>
            <rptOwnerName>PORTAGE BIOTECH INC.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>47 AVENUE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>TORONTO</rptOwnerCity>
            <rptOwnerState>A6</rptOwnerState>
            <rptOwnerZipCode>M5R 2G3</rptOwnerZipCode>
            <rptOwnerStateDescription>ONTARIO, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-01-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>35650</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>28.6135</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6305850</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Kam Shah, CFO</signatureName>
        <signatureDate>2018-01-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
