<SEC-DOCUMENT>0001445546-20-005712-index.html : 20201201
<SEC-HEADER>0001445546-20-005712.hdr.sgml : 20201201
<ACCEPTANCE-DATETIME>20201201094944
ACCESSION NUMBER:		0001445546-20-005712
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20201201
DATE AS OF CHANGE:		20201201
EFFECTIVENESS DATE:		20201201

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST TRUST EXCHANGE-TRADED ALPHADEX FUND
		CENTRAL INDEX KEY:			0001383496
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-140895
		FILM NUMBER:		201360004

	BUSINESS ADDRESS:	
		STREET 1:		120 EAST LIBERTY DRIVE, SUITE 400
		CITY:			WHEATON
		STATE:			IL
		ZIP:			60187
		BUSINESS PHONE:		630-765-8000

	MAIL ADDRESS:	
		STREET 1:		120 EAST LIBERTY DRIVE, SUITE 400
		CITY:			WHEATON
		STATE:			IL
		ZIP:			60187
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0001383496
<SERIES-ID>S000032963
<SERIES-NAME>First Trust Mega Cap AlphaDEX Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000101702
<CLASS-CONTRACT-NAME>First Trust Mega Cap AlphaDEX Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FMK
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>etf1_497e.htm
<DESCRIPTION>SUPPLEMENT TO PROSPECTUS, SUMMARY PROSPECTUS & SAI
<TEXT>
Document 1 - file: etf1_497e.htm

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

</DOCUMENT>
</SEC-DOCUMENT>