<SEC-DOCUMENT>0000938333-26-000007.txt : 20260730
<SEC-HEADER>0000938333-26-000007.hdr.sgml : 20260730
<ACCEPTANCE-DATETIME>20260730194244
ACCESSION NUMBER:		0000938333-26-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260728
FILED AS OF DATE:		20260730
DATE AS OF CHANGE:		20260730

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DUCA MAURICE J
		CENTRAL INDEX KEY:			0000938333
		ORGANIZATION NAME:           	
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37468
		FILM NUMBER:		261224930

	MAIL ADDRESS:	
		STREET 1:		PO BOX 5609
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93150

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			APPFOLIO INC
		CENTRAL INDEX KEY:			0001433195
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		ORGANIZATION NAME:           	06 Technology
		EIN:				260359894
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		70 CASTILIAN DRIVE
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93117
		BUSINESS PHONE:		8053646047

	MAIL ADDRESS:	
		STREET 1:		70 CASTILIAN DRIVE
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93117
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4-07302026_110739.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-07-28</periodOfReport>

    <issuer>
        <issuerCik>0001433195</issuerCik>
        <issuerName>APPFOLIO INC</issuerName>
        <issuerTradingSymbol>APPF</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000938333</rptOwnerCik>
            <rptOwnerName>DUCA MAURICE J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O IGSB, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1485 E. VALLEY ROAD, SUITE H</rptOwnerStreet2>
            <rptOwnerCity>SANTA BARBARA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93108</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>142857</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By IGSB Gaucho Fund I, LLC</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9805</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By IGSB Cardinal Core BV, LLC</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7022</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Charitable Remainder Trust</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These shares of Class A Common Stock (&quot;Class A Shares&quot;) are owned by IGSB Gaucho Fund I, LLC, a limited liability company, of which the Reporting Person is the managing member. In that capacity, the Reporting Person possesses sole voting and dispositive power over these Class A Shares. However, the Reporting Person disclaims beneficial ownership in these Class A Shares, except to the extent of any pecuniary interest he may have therein.</footnote>
        <footnote id="F2">These Class A Shares are owned by IGSB Cardinal Core BV, LLC, a limited liability company, of which the Reporting Person is the managing member. In that capacity, the Reporting Person possesses sole voting and dispositive power over these Class A Shares, but he disclaims beneficial ownership in these Class A Shares, except to the extent of any pecuniary interest he may have therein.</footnote>
        <footnote id="F3">These Class A Shares are held by a trust of which the Reporting Person is a co-trustee and, in that capacity, he may be deemed to share voting and dispositive power over these Class A Shares with the other trustee. However, the Reporting Person does not have a pecuniary interest in, and he disclaims beneficial ownership of, these Class A Shares.</footnote>
    </footnotes>

    <remarks>Due to a 30 line-item limitation in Table I, this is the second of two Forms 4 filed by the Reporting Person.</remarks>

    <ownerSignature>
        <signatureName>/s/ Kimberly Shea, Attorney-in-Fact for Maurice J. Duca</signatureName>
        <signatureDate>2026-07-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
