<SEC-DOCUMENT>0001193125-13-383821-index.html : 20131224
<SEC-HEADER>0001193125-13-383821.hdr.sgml : 20131224
<ACCEPTANCE-DATETIME>20130930100008
ACCESSION NUMBER:		0001193125-13-383821
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		17
FILED AS OF DATE:		20130930
DATE AS OF CHANGE:		20130930
EFFECTIVENESS DATE:		20130930

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:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-12112
		FILM NUMBER:		131121667

	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

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:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-05032
		FILM NUMBER:		131121668

	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>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000130960
<CLASS-CONTRACT-NAME>Institutional Shares
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>d566495d485bpos.htm
<DESCRIPTION>BARON INVESTMENT FUNDS TRUST
<TEXT>
Document 1 - file: d566495d485bpos.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.D6 <SEQUENCE>2 <FILENAME>d566495dex99d6.htm <DESCRIPTION>INVESTMENT ADVISORY AGREEMENT BETWEEN BARON DISCOVERY FUND AND BAMCO, INC. <TEXT> Document 2 - file: d566495dex99d6.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.D8 <SEQUENCE>3 <FILENAME>d566495dex99d8.htm <DESCRIPTION>AMENDED AND RESTATED SCHEDULE A, DATED AUGUST 19, 2013 <TEXT> Document 3 - file: d566495dex99d8.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.E <SEQUENCE>4 <FILENAME>d566495dex99e.htm <DESCRIPTION>DISTRIBUTION AGREEMENT BETWEEN REGISTRANT & BARON CAPITAL INC DTD 8/19/13 <TEXT> Document 4 - file: d566495dex99e.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.G11 <SEQUENCE>5 <FILENAME>d566495dex99g11.htm <DESCRIPTION>ADD'L SERIES LETTER FOR MASTER CUSTODIAN AGREEMENT & ADMINISTRATION AGREEMENT <TEXT> Document 5 - file: d566495dex99g11.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.H7 <SEQUENCE>6 <FILENAME>d566495dex99h7.htm <DESCRIPTION>SIXTH AMENDMENT TO LINE OF CREDIT AGREEMENT, DATED JULY 12, 2013. <TEXT> Document 6 - file: d566495dex99h7.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.J <SEQUENCE>7 <FILENAME>d566495dex99j.htm <DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM, PWC LLP. <TEXT> Document 7 - file: d566495dex99j.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.M <SEQUENCE>8 <FILENAME>d566495dex99m.htm <DESCRIPTION>PLAN OF DISTRIBUTION PURSUANT TO RULE 12B-1 <TEXT> Document 8 - file: d566495dex99m.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.N <SEQUENCE>9 <FILENAME>d566495dex99n.htm <DESCRIPTION>MULTI-CLASS PLAN ADOPTED PURSUANT TO RULE 18C-3. <TEXT> Document 9 - file: d566495dex99n.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.P <SEQUENCE>10 <FILENAME>d566495dex99p.htm <DESCRIPTION>AMENDED AND RESTATED CODE OF ETHICS, DATED FEBRUARY 12, 2013. <TEXT> Document 10 - file: d566495dex99p.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>g566495g08r73.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 13 - file: g566495g08r73.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>g566495g18x17.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 14 - file: g566495g18x17.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>g566495g43u15.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 15 - file: g566495g43u15.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>g566495g55o83.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 16 - file: g566495g55o83.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>g566495g55w27.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 17 - file: g566495g55w27.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>g566495g64n58.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 18 - file: g566495g64n58.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>g566495g72s36.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 19 - file: g566495g72s36.jpg
</DOCUMENT> </SEC-DOCUMENT>