<SEC-DOCUMENT>0001193125-21-106366-index.html : 20210405
<SEC-HEADER>0001193125-21-106366.hdr.sgml : 20210405
<ACCEPTANCE-DATETIME>20210405162353
ACCESSION NUMBER:		0001193125-21-106366
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		9
FILED AS OF DATE:		20210405
DATE AS OF CHANGE:		20210405

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALLEGHENY TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0001018963
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL PIPE & TUBES [3317]
		IRS NUMBER:				251792394
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12001
		FILM NUMBER:		21805671

	BUSINESS ADDRESS:	
		STREET 1:		1000 SIX PPG PLACE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15222
		BUSINESS PHONE:		4123942800

	MAIL ADDRESS:	
		STREET 1:		100 SIX PPG PLACE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15222

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGHENY TELEDYNE INC
		DATE OF NAME CHANGE:	19960716
</SEC-HEADER>
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<SEQUENCE>1
<FILENAME>d12507ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d12507ddefa14a.htm

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<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g12507aa.jpg

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<SEQUENCE>3
<FILENAME>g12507bb.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g12507bb.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g12507g09v22.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g12507g09v22.jpg

</DOCUMENT>
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<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g12507plus.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g12507plus.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g12507rr.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g12507rr.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g12507ss.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g12507ss.jpg

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<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g12507tt.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g12507tt.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g12507uu.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g12507uu.jpg

</DOCUMENT>
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