<SEC-DOCUMENT>0001476765-19-000106-index.html : 20191125
<SEC-HEADER>0001476765-19-000106.hdr.sgml : 20191125
<ACCEPTANCE-DATETIME>20191125171438
ACCESSION NUMBER:		0001476765-19-000106
CONFORMED SUBMISSION TYPE:	10-K
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20190930
FILED AS OF DATE:		20191125
DATE AS OF CHANGE:		20191125

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GOLUB CAPITAL BDC, Inc.
		CENTRAL INDEX KEY:			0001476765
		IRS NUMBER:				471893276
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		10-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	814-00794
		FILM NUMBER:		191246992

	BUSINESS ADDRESS:	
		STREET 1:		666 FIFTH AVENUE
		STREET 2:		18TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10103
		BUSINESS PHONE:		212.750.6060

	MAIL ADDRESS:	
		STREET 1:		666 FIFTH AVENUE
		STREET 2:		18TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GOLUB CAPITAL INVESTMENT Corp
		DATE OF NAME CHANGE:	20170511

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Golub Capital BDC, Inc.
		DATE OF NAME CHANGE:	20100414

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Golub Capital BDC LLC
		DATE OF NAME CHANGE:	20091113
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K
<SEQUENCE>1
<FILENAME>gbdcfy2019q410-k.htm
<DESCRIPTION>10-K
<TEXT>
Document 1 - file: gbdcfy2019q410-k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-14.1
<SEQUENCE>2
<FILENAME>gbdcexhibit141-fy2019q4.htm
<DESCRIPTION>EXHIBIT 14.1
<TEXT>
Document 2 - file: gbdcexhibit141-fy2019q4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-21.1
<SEQUENCE>3
<FILENAME>gbdcexhibit211-fy2019q4.htm
<DESCRIPTION>EXHIBIT 21.1
<TEXT>
Document 3 - file: gbdcexhibit211-fy2019q4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>4
<FILENAME>gbdcfy2019q4exhibit311.htm
<DESCRIPTION>EXHIBIT 31.1
<TEXT>
Document 4 - file: gbdcfy2019q4exhibit311.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>5
<FILENAME>gbdcfy2019q4exhibit312.htm
<DESCRIPTION>EXHIBIT 31.2
<TEXT>
Document 5 - file: gbdcfy2019q4exhibit312.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>6
<FILENAME>gbdcfy2019q4exhibit321.htm
<DESCRIPTION>EXHIBIT 32.1
<TEXT>
Document 6 - file: gbdcfy2019q4exhibit321.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.2
<SEQUENCE>7
<FILENAME>gbdcexhibit322-fy2019q4.htm
<DESCRIPTION>EXHIBIT 32.2
<TEXT>
Document 7 - file: gbdcexhibit322-fy2019q4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>8
<FILENAME>gbdcexhibit991-fy2019q4.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 8 - file: gbdcexhibit991-fy2019q4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>chart-20bac3ec138b5e838e8a01.jpg
<TEXT>
Document 9 - file: chart-20bac3ec138b5e838e8a01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>illustrativedealevaluationpr.jpg
<TEXT>
Document 10 - file: illustrativedealevaluationpr.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>preincentivefeenetinvest2017.jpg
<TEXT>
Document 11 - file: preincentivefeenetinvest2017.jpg

</DOCUMENT>
</SEC-DOCUMENT>