<SEC-DOCUMENT>0001209191-19-054024.txt : 20191024
<SEC-HEADER>0001209191-19-054024.hdr.sgml : 20191024
<ACCEPTANCE-DATETIME>20191024215319
ACCESSION NUMBER:		0001209191-19-054024
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191024
FILED AS OF DATE:		20191024
DATE AS OF CHANGE:		20191024

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Heron Patrick J
		CENTRAL INDEX KEY:			0001365617

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39094
		FILM NUMBER:		191167367

	MAIL ADDRESS:	
		STREET 1:		550 HAMILTON AVE., SUITE 100
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Topper James N
		CENTRAL INDEX KEY:			0001341382

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39094
		FILM NUMBER:		191167368

	MAIL ADDRESS:	
		STREET 1:		550 HAMILTON AVENUE, SUITE 100
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FHMLS IX, L.P.
		CENTRAL INDEX KEY:			0001782789
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39094
		FILM NUMBER:		191167369

	BUSINESS ADDRESS:	
		STREET 1:		601 UNION STREET
		STREET 2:		SUITE 3200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101
		BUSINESS PHONE:		206-254-7200

	MAIL ADDRESS:	
		STREET 1:		601 UNION STREET
		STREET 2:		SUITE 3200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FHMLS IX, L.L.C.
		CENTRAL INDEX KEY:			0001782791
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39094
		FILM NUMBER:		191167370

	BUSINESS ADDRESS:	
		STREET 1:		601 UNION STREET
		STREET 2:		SUITE 3200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101
		BUSINESS PHONE:		206-254-7200

	MAIL ADDRESS:	
		STREET 1:		601 UNION STREET
		STREET 2:		SUITE 3200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Frazier Life Sciences IX, L.P.
		CENTRAL INDEX KEY:			0001720320
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39094
		FILM NUMBER:		191167371

	BUSINESS ADDRESS:	
		STREET 1:		601 UNION STREET
		STREET 2:		SUITE 3200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101
		BUSINESS PHONE:		206-254-7200

	MAIL ADDRESS:	
		STREET 1:		601 UNION STREET
		STREET 2:		SUITE 3200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Phathom Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001783183
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				824151574
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2150 E. LAKE COOK ROAD, SUITE 800
		CITY:			BUFFALO GROVE
		STATE:			IL
		ZIP:			60089
		BUSINESS PHONE:		650-325-5156

	MAIL ADDRESS:	
		STREET 1:		2150 E. LAKE COOK ROAD, SUITE 800
		CITY:			BUFFALO GROVE
		STATE:			IL
		ZIP:			60089
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2019-10-24</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001783183</issuerCik>
        <issuerName>Phathom Pharmaceuticals, Inc.</issuerName>
        <issuerTradingSymbol>PHAT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001720320</rptOwnerCik>
            <rptOwnerName>Frazier Life Sciences IX, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 UNION STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3200</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001782791</rptOwnerCik>
            <rptOwnerName>FHMLS IX, L.L.C.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 UNION STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3200</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001782789</rptOwnerCik>
            <rptOwnerName>FHMLS IX, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 UNION STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3200</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001341382</rptOwnerCik>
            <rptOwnerName>Topper James N</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 UNION STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3200</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001365617</rptOwnerCik>
            <rptOwnerName>Heron Patrick J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 UNION STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3200</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4877998</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Convertible Promissory Notes</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>15.20</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2020-05-07</value>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1353640</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The shares reported herein are held of record by Frazier Life Sciences IX, L.P. (&quot;FLS IX&quot;). The general partner of FLS IX is FHMLS IX, L.P., and the general partner of FHMLS IX, L.P. is FHMLS IX, L.L.C. James Topper and Patrick Heron are the sole managing members of FHMLS IX, L.L.C. and share voting and investment power of the securities held by FLS IX. Dr. Topper and Mr. Heron disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.</footnote>
        <footnote id="F2">The outstanding principal and unpaid accrued interest due on the Convertible Promissory Notes will automatically convert into shares of the Issuer's Common Stock immediately prior to the closing of the initial public offering.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Frazier Life Sciences IX, L.P.
By: FHMLS IX, L.P., its general partner
By: FHMLS IX, L.L.C., its general partner

By: /s/ James Topper
Name: James Topper
Title: Managing Member</signatureName>
        <signatureDate>2019-10-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Frazier Life Sciences IX, L.P. By: FHMLS IX, L.P., its general partner By: FHMLS IX, L.L.C., its general partner  By: /s/ James Topper Name: James Topper Title: Managing Member</signatureName>
        <signatureDate>2019-10-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>FHMLS IX, L.L.C.  By: /s/ James Topper Name: James Topper Title: Managing Member</signatureName>
        <signatureDate>2019-10-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ James Topper</signatureName>
        <signatureDate>2019-10-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Patrick Heron</signatureName>
        <signatureDate>2019-10-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
