<SEC-DOCUMENT>0001379491-19-000251-index.html : 20190125
<SEC-HEADER>0001379491-19-000251.hdr.sgml : 20190125
<ACCEPTANCE-DATETIME>20190125105100
ACCESSION NUMBER:		0001379491-19-000251
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		14
FILED AS OF DATE:		20190125
DATE AS OF CHANGE:		20190125
EFFECTIVENESS DATE:		20190129

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:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-79755
		FILM NUMBER:		19541626

	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

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:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-03583
		FILM NUMBER:		19541625

	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>S000007118
<SERIES-NAME>Fidelity Growth Strategies Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000019447
<CLASS-CONTRACT-NAME>Fidelity Growth Strategies Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FDEGX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000064241
<CLASS-CONTRACT-NAME>Class K
<CLASS-CONTRACT-TICKER-SYMBOL>FAGKX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000707823
<SERIES-ID>S000007119
<SERIES-NAME>Fidelity Growth Company Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000019448
<CLASS-CONTRACT-NAME>Fidelity Growth Company Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FDGRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000064242
<CLASS-CONTRACT-NAME>Class K
<CLASS-CONTRACT-TICKER-SYMBOL>FGCKX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000707823
<SERIES-ID>S000007120
<SERIES-NAME>Fidelity New Millennium Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000019449
<CLASS-CONTRACT-NAME>Fidelity New Millennium Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FMILX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000707823
<SERIES-ID>S000042626
<SERIES-NAME>Fidelity Series Growth Company Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000131783
<CLASS-CONTRACT-NAME>Fidelity Series Growth Company Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FCGSX
</CLASS-CONTRACT>
</SERIES>
<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>
<SERIES>
<OWNER-CIK>0000707823
<SERIES-ID>S000057290
<SERIES-NAME>Fidelity Growth Strategies K6 Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000182866
<CLASS-CONTRACT-NAME>Fidelity Growth Strategies K6 Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FSKGX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>filing936.htm
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
Document 1 - file: filing936.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.I LEGAL OPININ
<SEQUENCE>2
<FILENAME>exi.htm
<DESCRIPTION>EXI.HTM
<TEXT>
Document 2 - file: exi.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.J OTHER OPININ
<SEQUENCE>3
<FILENAME>exj1.htm
<DESCRIPTION>EXJ1.HTM
<TEXT>
Document 3 - file: exj1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.J OTHER OPININ
<SEQUENCE>4
<FILENAME>exj2.htm
<DESCRIPTION>EXJ2.HTM
<TEXT>
Document 4 - file: exj2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>fipro_logo.jpg
<TEXT>
Document 7 - file: fipro_logo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>img453064662.jpg
<TEXT>
Document 8 - file: img453064662.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>img453061985.jpg
<TEXT>
Document 9 - file: img453061985.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>img453029673.jpg
<TEXT>
Document 10 - file: img453029673.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>img453219304.jpg
<TEXT>
Document 11 - file: img453219304.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>img453622027.jpg
<TEXT>
Document 12 - file: img453622027.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>img453713367.jpg
<TEXT>
Document 13 - file: img453713367.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>img453741019.jpg
<TEXT>
Document 14 - file: img453741019.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>img453701938.jpg
<TEXT>
Document 15 - file: img453701938.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>fi_logo.jpg
<TEXT>
Document 16 - file: fi_logo.jpg

</DOCUMENT>
</SEC-DOCUMENT>