<SEC-DOCUMENT>0001193125-17-048096-index.html : 20170217
<SEC-HEADER>0001193125-17-048096.hdr.sgml : 20170217
<ACCEPTANCE-DATETIME>20170217170605
ACCESSION NUMBER:		0001193125-17-048096
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20170217
DATE AS OF CHANGE:		20170217
EFFECTIVENESS DATE:		20170217

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JANUS INVESTMENT FUND
		CENTRAL INDEX KEY:			0000277751
		IRS NUMBER:				840592523
		STATE OF INCORPORATION:			MA

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-215393
		FILM NUMBER:		17622232

	BUSINESS ADDRESS:	
		STREET 1:		151 DETROIT STREET
		CITY:			DENVER
		STATE:			CO
		ZIP:			80206
		BUSINESS PHONE:		303-333-3863

	MAIL ADDRESS:	
		STREET 1:		151 DETROIT STREET
		CITY:			DENVER
		STATE:			CO
		ZIP:			80206

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	JANUS FUND /MD/
		DATE OF NAME CHANGE:	19870701
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000277751
<SERIES-ID>S000010470
<SERIES-NAME>Janus Research Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000028926
<CLASS-CONTRACT-NAME>Class T
<CLASS-CONTRACT-TICKER-SYMBOL>JAMRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077669
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>JRAAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077670
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>JRACX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077671
<CLASS-CONTRACT-NAME>Class I
<CLASS-CONTRACT-TICKER-SYMBOL>JRAIX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077672
<CLASS-CONTRACT-NAME>Class S
<CLASS-CONTRACT-TICKER-SYMBOL>JRASX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000083517
<CLASS-CONTRACT-NAME>Class D
<CLASS-CONTRACT-TICKER-SYMBOL>JNRFX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000114872
<CLASS-CONTRACT-NAME>Class N
<CLASS-CONTRACT-TICKER-SYMBOL>JRANX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000177053
<CLASS-CONTRACT-NAME>Class R
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000277751
<SERIES-ID>S000010493
<SERIES-NAME>Janus Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000028955
<CLASS-CONTRACT-NAME>Class T
<CLASS-CONTRACT-TICKER-SYMBOL>JANSX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077747
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>JDGAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077748
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>JGOCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077749
<CLASS-CONTRACT-NAME>Class I
<CLASS-CONTRACT-TICKER-SYMBOL>JGROX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077750
<CLASS-CONTRACT-NAME>Class R
<CLASS-CONTRACT-TICKER-SYMBOL>JDGRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077751
<CLASS-CONTRACT-NAME>Class S
<CLASS-CONTRACT-TICKER-SYMBOL>JGORX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000083537
<CLASS-CONTRACT-NAME>Class D
<CLASS-CONTRACT-TICKER-SYMBOL>JANDX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000114885
<CLASS-CONTRACT-NAME>Class N
<CLASS-CONTRACT-TICKER-SYMBOL>JDGNX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>d289405d497.htm
<DESCRIPTION>497
<TEXT>
Document 1 - file: d289405d497.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g289405g44z89.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g289405g44z89.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g289405g48l79.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g289405g48l79.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g289405g54m57.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g289405g54m57.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g289405g98l69.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g289405g98l69.jpg

</DOCUMENT>
</SEC-DOCUMENT>