<SEC-DOCUMENT>0001415889-25-024175.txt : 20250910
<SEC-HEADER>0001415889-25-024175.hdr.sgml : 20250910
<ACCEPTANCE-DATETIME>20250910192039
ACCESSION NUMBER:		0001415889-25-024175
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20250910
FILED AS OF DATE:		20250910
DATE AS OF CHANGE:		20250910

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RUFFOLO ROBERT R
		CENTRAL INDEX KEY:			0001187308
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42831
		FILM NUMBER:		251306914

	MAIL ADDRESS:	
		STREET 1:		WYETH
		STREET 2:		FIVE GIRALDA FARMS
		CITY:			MADISON
		STATE:			NJ
		ZIP:			07940

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LB PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001691082
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		575 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		917-450-6581

	MAIL ADDRESS:	
		STREET 1:		575 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LB PHARMACEUTICALS INC.
		DATE OF NAME CHANGE:	20161129
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3-09102025_110936.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2025-09-10</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001691082</issuerCik>
        <issuerName>LB PHARMACEUTICALS INC</issuerName>
        <issuerTradingSymbol>LBRX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001187308</rptOwnerCik>
            <rptOwnerName>RUFFOLO ROBERT R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LB PHARMACEUTICALS INC</rptOwnerStreet1>
            <rptOwnerStreet2>ONE PENNSYLVANIA PLAZA, SUITE 1025</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10119</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2365</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>69.72</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2028-06-26</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1792</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>69.72</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2030-08-24</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>717</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>41.84</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2034-03-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10757</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Includes 1,792 shares of restricted stock which shall vest six months from the closing date of the Issuer's initial public offering.</footnote>
        <footnote id="F2">Immediately exercisable.</footnote>
        <footnote id="F3">One fourth (1/4) of the shares subject to the option award vested on March 4, 2025 and the remaining shares subject to the option vested or shall vest in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continuous service through such vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Marc Panoff, Attorney-in-Fact</signatureName>
        <signatureDate>2025-09-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24-09102025_110936.htm
<TEXT>
<!DOCTYPE html PUBLIC "-//IETF//DTD HTML//EN">
<html><head><title>ex24-09102025_110936.htm</title></head><body style="margin-top:0;font-family:Times New Roman; font-size:10pt; color:#000000">
<p style="margin:0px" align="center"><b>POWER OF ATTORNEY</b></p>
<p style="margin:0px" align="center"><br></p>
<p style="margin:0px" align="center">(For Executing Forms 3, 4, and 5)</p>
<p style="margin:0px" align="center"><br></p>
<p style="margin:0px; text-indent:61.067px" align="justify">Know all by these presents, that the undersigned hereby constitutes and appoints each of Heather Turner, Gad Soffer, and Marc Panoff of LB Pharmaceuticals Inc (the "<b><i>Company</i></b>"), signing individually, the undersigned's true and lawful attorneys-in-fact and agents to:</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin-top:0px; margin-bottom:-2px; text-indent:61.067px; width:122.133px; float:left">(1)</p>
<p style="margin:0px; text-indent:-2px" align="justify">prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the Securities and Exchange Commission (the "<b><i>SEC</i></b>") Forms 3, 4 and 5 (including any amendments thereto) in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the "<b><i>Exchange Act</i></b>"), and the rules thereunder in the undersigned's capacity as an officer, director or beneficial owner of more than 10% of a registered class of securities of the Company;</p>
<p style="margin:0px; clear:left" align="justify"><br></p>
<p style="margin-top:0px; margin-bottom:-2px; text-indent:61.067px; width:122.133px; float:left">(2)</p>
<p style="margin:0px; text-indent:-2px" align="justify">do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to execute such Forms 3, 4 or 5 (including amendments thereto) and timely file such forms with the SEC and any stock exchange or any similar authority; and</p>
<p style="margin:0px; clear:left" align="justify"><br></p>
<p style="margin-top:0px; margin-bottom:-2px; text-indent:61.067px; width:122.133px; float:left">(3)</p>
<p style="margin:0px; text-indent:-2px" align="justify">take any other action of any type whatsoever in connection with the foregoing that, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required of the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in the attorney-in-fact's discretion.</p>
<p style="margin:0px; clear:left" align="justify"><br></p>
<p style="margin:0px; text-indent:61.067px" align="justify">The undersigned hereby grants to each such attorneyinfact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorneyinfact, or such attorneyinfact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. &nbsp;The undersigned acknowledges that the foregoing attorneys-in-fact, and their substitutes, in serving in such capacity at the request of the undersigned, are not assuming (nor is the Company assuming) any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; text-indent:61.067px" align="justify">This Power of Attorney shall remain in full force and effect until the earliest to occur of (a) the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, (b) revocation by the undersigned in a signed writing delivered to the Company and the foregoing attorneys-in fact or (c) as to any attorney-in-fact individually, until such attorney-in-fact is no longer employed by the Company. &nbsp;</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; text-indent:61.067px" align="justify">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of the date written below.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify">Date: &nbsp;September 10, 2025</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><u>/s/ Robert R. Ruffolo, Jr.</u></p>
<p style="margin:0px" align="justify">Name: Robert R. Ruffolo, Jr.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><br></p>
</body></html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
