<SEC-DOCUMENT>0001387131-19-002988-index.html : 20190426
<SEC-HEADER>0001387131-19-002988.hdr.sgml : 20190426
<ACCEPTANCE-DATETIME>20190426151606
ACCESSION NUMBER:		0001387131-19-002988
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20190426
DATE AS OF CHANGE:		20190426
EFFECTIVENESS DATE:		20190426

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:		19771347

	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>S000043669
<SERIES-NAME>Thornburg Low Duration Municipal Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000135383
<CLASS-CONTRACT-NAME>Thornburg Low Duration Municipal Fund Class A
<CLASS-CONTRACT-TICKER-SYMBOL>TLMAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000135384
<CLASS-CONTRACT-NAME>Thornburg Low Duration Municipal Fund Class I
<CLASS-CONTRACT-TICKER-SYMBOL>TLMIX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>ldm-497k_042619.htm
<DESCRIPTION>SUMMARY PROSPECTUS
<TEXT>
Document 1 - file: ldm-497k_042619.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>ldm-497k_042619img001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: ldm-497k_042619img001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>ldm-497k_042619img002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: ldm-497k_042619img002.gif

</DOCUMENT>
</SEC-DOCUMENT>