<SEC-DOCUMENT>0001379491-17-006769-index.html : 20171018
<SEC-HEADER>0001379491-17-006769.hdr.sgml : 20171018
<ACCEPTANCE-DATETIME>20171018094337
ACCESSION NUMBER:		0001379491-17-006769
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20171018
DATE AS OF CHANGE:		20171018
EFFECTIVENESS DATE:		20171018

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIDELITY MT VERNON STREET TRUST
		CENTRAL INDEX KEY:			0000707823
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1130

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-79755
		FILM NUMBER:		171141933

	BUSINESS ADDRESS:	
		STREET 1:		245 SUMMER STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
		BUSINESS PHONE:		617-563-7000

	MAIL ADDRESS:	
		STREET 1:		245 SUMMER STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIDELITY GROWTH COMPANY FUND
		DATE OF NAME CHANGE:	19910110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIDELITY MERCURY FUND
		DATE OF NAME CHANGE:	19861216
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000707823
<SERIES-ID>S000056370
<SERIES-NAME>Fidelity Flex Mid Cap Growth Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000177597
<CLASS-CONTRACT-NAME>Fidelity Flex Mid Cap Growth Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FFMGX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>filing936.htm
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
Document 1 - file: filing936.htm

</DOCUMENT>
</SEC-DOCUMENT>