<SEC-DOCUMENT>0000810902-14-000005-index.html : 20141125
<SEC-HEADER>0000810902-14-000005.hdr.sgml : 20141125
<ACCEPTANCE-DATETIME>20141125140550
ACCESSION NUMBER:		0000810902-14-000005
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20140930
FILED AS OF DATE:		20141125
DATE AS OF CHANGE:		20141125
EFFECTIVENESS DATE:		20141125

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND)
		CENTRAL INDEX KEY:			0000810902
		IRS NUMBER:				136891420
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-05032
		FILM NUMBER:		141248965

	BUSINESS ADDRESS:	
		STREET 1:		767 FIFTH AVE
		STREET 2:		49TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10153
		BUSINESS PHONE:		2125832000

	MAIL ADDRESS:	
		STREET 1:		767 FIFTH AVE
		STREET 2:		49TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10153

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BARON ASSET FUND
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000810902
<SERIES-ID>S000000582
<SERIES-NAME>BARON ASSET FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000001635
<CLASS-CONTRACT-NAME>BARON ASSET FUND
<CLASS-CONTRACT-TICKER-SYMBOL>BARAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077818
<CLASS-CONTRACT-NAME>Institutional Shares
<CLASS-CONTRACT-TICKER-SYMBOL>BARIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000810902
<SERIES-ID>S000000583
<SERIES-NAME>BARON GROWTH FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000001636
<CLASS-CONTRACT-NAME>BARON GROWTH FUND
<CLASS-CONTRACT-TICKER-SYMBOL>BGRFX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077819
<CLASS-CONTRACT-NAME>Institutional Shares
<CLASS-CONTRACT-TICKER-SYMBOL>BGRIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000810902
<SERIES-ID>S000000584
<SERIES-NAME>BARON SMALL CAP FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000001637
<CLASS-CONTRACT-NAME>BARON SMALL CAP FUND
<CLASS-CONTRACT-TICKER-SYMBOL>BSCFX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077820
<CLASS-CONTRACT-NAME>Institutional Shares
<CLASS-CONTRACT-TICKER-SYMBOL>BSFIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000810902
<SERIES-ID>S000000585
<SERIES-NAME>BARON OPPORTUNITY FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000001638
<CLASS-CONTRACT-NAME>BARON OPPORTUNITY FUND
<CLASS-CONTRACT-TICKER-SYMBOL>BIOPX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077821
<CLASS-CONTRACT-NAME>Institutional Shares
<CLASS-CONTRACT-TICKER-SYMBOL>BIOIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000810902
<SERIES-ID>S000000586
<SERIES-NAME>BARON FIFTH AVENUE GROWTH FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000001639
<CLASS-CONTRACT-NAME>BARON FIFTH AVENUE GROWTH FUND
<CLASS-CONTRACT-TICKER-SYMBOL>BFTHX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000077822
<CLASS-CONTRACT-NAME>Institutional Shares
<CLASS-CONTRACT-TICKER-SYMBOL>BFTIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000810902
<SERIES-ID>S000042178
<SERIES-NAME>BARON DISCOVERY FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000130959
<CLASS-CONTRACT-NAME>BARON DISCOVERY FUND
<CLASS-CONTRACT-TICKER-SYMBOL>BDFFX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000130960
<CLASS-CONTRACT-NAME>Institutional Shares
<CLASS-CONTRACT-TICKER-SYMBOL>BDFIX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>biftanswer.fil
<TEXT>
Document 1 - file: biftanswer.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>77B.txt
<TEXT>
Document 2 - file: 77B.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q1 OTHR EXHB
<SEQUENCE>3
<FILENAME>77Q1.txt
<TEXT>
Document 3 - file: 77Q1.txt

</DOCUMENT>
</SEC-DOCUMENT>