<SEC-DOCUMENT>0001628280-25-035239.txt : 20250717
<SEC-HEADER>0001628280-25-035239.hdr.sgml : 20250717
<ACCEPTANCE-DATETIME>20250717170543
ACCESSION NUMBER:		0001628280-25-035239
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250715
FILED AS OF DATE:		20250717
DATE AS OF CHANGE:		20250717

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Satoren Brandon
		CENTRAL INDEX KEY:			0001894209
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	814-00735
		FILM NUMBER:		251131399

	MAIL ADDRESS:	
		STREET 1:		650 MADISON AVENUE
		STREET 2:		23RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Portman Ridge Finance Corp
		CENTRAL INDEX KEY:			0001372807
		ORGANIZATION NAME:           	
		EIN:				205951150
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		650 MADISON AVNUE
		STREET 2:		3RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212.891.2880

	MAIL ADDRESS:	
		STREET 1:		650 MADISON AVNUE
		STREET 2:		3RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KCAP Financial, Inc.
		DATE OF NAME CHANGE:	20120710

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Kohlberg Capital CORP
		DATE OF NAME CHANGE:	20061211

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Kohlberg Capital, LLC
		DATE OF NAME CHANGE:	20060815
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1752786336.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-07-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001372807</issuerCik>
        <issuerName>Portman Ridge Finance Corp</issuerName>
        <issuerTradingSymbol>PTMN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001894209</rptOwnerCik>
            <rptOwnerName>Satoren Brandon</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PORTMAN RIDGE FINANCE CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>650 MADISON AVENUE, 3RD FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-07-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>52</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1113.1514</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Acquired upon the completion of, and pursuant to the transactions contemplated by, the Agreement and Plan of Merger, dated as of January 29, 2025, by and among Portman Ridge Finance Corporation, a Delaware corporation (&quot;PTMN&quot;), Logan Ridge Finance Corporation, a Maryland corporation (&quot;LRFC&quot;), Portman Ridge Merger Sub, Inc., a Maryland corporation, Sierra Crest Investment Management LLC, a Delaware limited liability company and Mount Logan Management LLC, a Delaware limited liability company (the &quot;Merger Agreement&quot;). Pursuant to the Merger Agreement, each share of LRFC's common stock, par value $0.01 per share, was converted into the right to receive 1.5 shares of PTMN's common stock, par value $0.01 per share (subject to adjustment for cash payable in lieu of fractional shares).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Brandon Satoren</signatureName>
        <signatureDate>2025-07-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
