<SEC-DOCUMENT>0001161697-15-000430.txt : 20151009
<SEC-HEADER>0001161697-15-000430.hdr.sgml : 20151009
<ACCEPTANCE-DATETIME>20151009160600
ACCESSION NUMBER:		0001161697-15-000430
CONFORMED SUBMISSION TYPE:	3/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150908
FILED AS OF DATE:		20151009
DATE AS OF CHANGE:		20151009

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CATALYST PHARMACEUTICALS, INC.
		CENTRAL INDEX KEY:			0001369568
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		355 ALHAMBRA CIRCLE
		STREET 2:		SUITE 1250
		CITY:			CORAL GABLES
		STATE:			FL
		ZIP:			33134
		BUSINESS PHONE:		(305) 529-2522

	MAIL ADDRESS:	
		STREET 1:		355 ALHAMBRA CIRCLE
		STREET 2:		SUITE 1250
		CITY:			CORAL GABLES
		STATE:			FL
		ZIP:			33134

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CATALYST PHARMACEUTICAL PARTNERS, INC.
		DATE OF NAME CHANGE:	20110215

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Catalyst Pharmaceutical Partners, Inc.
		DATE OF NAME CHANGE:	20060719

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Merrigan Paul J
		CENTRAL INDEX KEY:			0001653275

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33057
		FILM NUMBER:		151153219

	MAIL ADDRESS:	
		STREET 1:		355 ALHAMBRA CIRCLE
		STREET 2:		SUITE 1250
		CITY:			CORAL GABLES
		STATE:			FL
		ZIP:			33134
</SEC-HEADER>
<DOCUMENT>
<TYPE>3/A
<SEQUENCE>1
<FILENAME>form_3.xml
<DESCRIPTION>FORM 3/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2015-09-08</periodOfReport>

    <dateOfOriginalSubmission>2015-09-16</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001369568</issuerCik>
        <issuerName>CATALYST PHARMACEUTICALS, INC.</issuerName>
        <issuerTradingSymbol>CPRX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001653275</rptOwnerCik>
            <rptOwnerName>Merrigan Paul J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>355 ALHAMBRA CIRCLE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1250</rptOwnerStreet2>
            <rptOwnerCity>CORAL GABLES</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Commercial Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Options to purchase common stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.20</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2016-09-08</value>
            </exerciseDate>
            <expirationDate>
                <value>2022-09-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Options to purchase common stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.20</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2022-09-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <footnoteId id="F1"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Options to purchase common stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.20</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2018-09-08</value>
            </exerciseDate>
            <expirationDate>
                <value>2022-09-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4159</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">4,167 shares will vest on a monthly basis on the 8th of each month commencing on October 8, 2016 through and until August 8, 2018.</footnote>
        <footnote id="F2">This Form 3/A is being filed to correct a scrivener's error in the exercise price of the stock options reported in the Reporting Person's Form 3 originally filed on September 16, 2015. The correct exercise price of the stock options is $4.20 per share rather than the $3.89 per share reported in the Form 3 as originally filed. In all other respects, the Form 3/A is identical to the Form 3 as originally filed.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Paul J. Merrigan</signatureName>
        <signatureDate>2015-10-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
