<SEC-DOCUMENT>0001476765-18-000015-index.html : 20180207
<SEC-HEADER>0001476765-18-000015.hdr.sgml : 20180207
<ACCEPTANCE-DATETIME>20180207161311
ACCESSION NUMBER:		0001476765-18-000015
CONFORMED SUBMISSION TYPE:	10-Q
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20171231
FILED AS OF DATE:		20180207
DATE AS OF CHANGE:		20180207

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-Q
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	814-00794
		FILM NUMBER:		18581276

	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-Q
<SEQUENCE>1
<FILENAME>gbdcfy2018q1.htm
<DESCRIPTION>10-Q
<TEXT>
Document 1 - file: gbdcfy2018q1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>2
<FILENAME>gbdcexhibit311123117.htm
<DESCRIPTION>EXHIBIT 31.1
<TEXT>
Document 2 - file: gbdcexhibit311123117.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>3
<FILENAME>gbdcexhibit312123117.htm
<DESCRIPTION>EXHIBIT 31.2
<TEXT>
Document 3 - file: gbdcexhibit312123117.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>4
<FILENAME>gbdcexhibit321123117.htm
<DESCRIPTION>EXHIBIT 32.1
<TEXT>
Document 4 - file: gbdcexhibit321123117.htm

</DOCUMENT>
</SEC-DOCUMENT>