    <SEC-DOCUMENT>0001104659-23-060889-index.html : 20230515
    <SEC-HEADER>0001104659-23-060889.hdr.sgml : 20230515
    <ACCEPTANCE-DATETIME>20230515165335
    ACCESSION NUMBER:		0001104659-23-060889
    CONFORMED SUBMISSION TYPE:	40-17G
    PUBLIC DOCUMENT COUNT:		7
    FILED AS OF DATE:		20230515
    DATE AS OF CHANGE:		20230515
    EFFECTIVENESS DATE:		20230515

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			New Mountain Finance Corp
    		CENTRAL INDEX KEY:			0001496099
    		IRS NUMBER:				272978010
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		40-17G
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	814-00832
    		FILM NUMBER:		23923767

    	BUSINESS ADDRESS:
    		STREET 1:		1633 BROADWAY
    		STREET 2:		48TH FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10019
    		BUSINESS PHONE:		2127300200

    	MAIL ADDRESS:
    		STREET 1:		1633 BROADWAY
    		STREET 2:		48TH FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10019

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	New Mountain Guardian Corp
    		DATE OF NAME CHANGE:	20100706
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>40-17G
    <SEQUENCE>1
    <FILENAME>tm2315699d1_4017g.htm
    <DESCRIPTION>40-17G
    <TEXT>
    Document 1 - file: tm2315699d1_4017g.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>tm2315699d1_4017gimg001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: tm2315699d1_4017gimg001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>tm2315699d1_4017gimg002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: tm2315699d1_4017gimg002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>tm2315699d1_4017gimg003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: tm2315699d1_4017gimg003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>tm2315699d1_4017gimg004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: tm2315699d1_4017gimg004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tm2315699d1_4017gimg005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tm2315699d1_4017gimg005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tm2315699d1_4017gimg006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tm2315699d1_4017gimg006.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>