<SEC-DOCUMENT>0001387131-21-001540-index.html : 20210129
<SEC-HEADER>0001387131-21-001540.hdr.sgml : 20210129
<ACCEPTANCE-DATETIME>20210129132945
ACCESSION NUMBER:		0001387131-21-001540
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20210129
DATE AS OF CHANGE:		20210129
EFFECTIVENESS DATE:		20210129

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			THORNBURG INVESTMENT TRUST
		CENTRAL INDEX KEY:			0000816153
		IRS NUMBER:				061158764
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		497K
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-14905
		FILM NUMBER:		21570041

	BUSINESS ADDRESS:	
		STREET 1:		2300 NORTH RIDGETOP ROAD
		CITY:			SANTA FE
		STATE:			NM
		ZIP:			87506-8361
		BUSINESS PHONE:		5059840200

	MAIL ADDRESS:	
		STREET 1:		2300 NORTH RIDGETOP ROAD
		CITY:			SANTA FE
		STATE:			NM
		ZIP:			87506-8361

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	THORNBURG INCOME TRUST
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LIMITED TERM TRUST
		DATE OF NAME CHANGE:	19870816
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000816153
<SERIES-ID>S000020097
<SERIES-NAME>Thornburg Strategic Income Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000056389
<CLASS-CONTRACT-NAME>Thornburg Strategic Income Fund - Class A
<CLASS-CONTRACT-TICKER-SYMBOL>TSIAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000056390
<CLASS-CONTRACT-NAME>Thornburg Strategic Income Fund - Class C
<CLASS-CONTRACT-TICKER-SYMBOL>TSICX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000056391
<CLASS-CONTRACT-NAME>Thornburg Strategic Income Fund - Class I
<CLASS-CONTRACT-TICKER-SYMBOL>TSIIX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>si-497k_020121.htm
<DESCRIPTION>SUMMARY PROSPECTUS
<TEXT>
Document 1 - file: si-497k_020121.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>si-497k_020121img001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: si-497k_020121img001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>si-497k_020121img002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: si-497k_020121img002.gif

</DOCUMENT>
</SEC-DOCUMENT>