<SEC-DOCUMENT>0001193125-20-112196.txt : 20200420
<SEC-HEADER>0001193125-20-112196.hdr.sgml : 20200420
<ACCEPTANCE-DATETIME>20200420162803
ACCESSION NUMBER:		0001193125-20-112196
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20200420
DATE AS OF CHANGE:		20200420
EFFECTIVENESS DATE:		20200420

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:		20802813

	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>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d915764ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
<HTML><HEAD>
<TITLE>DEFA14A</TITLE>
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  <P STYLE="margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
<CENTER><DIV style="WIDTH: 8.5in" align=left> <P STYLE="margin: 0">&nbsp;</P>
<DIV ALIGN="LEFT" STYLE="margin-top: 1pt; margin-bottom: 1pt"><DIV STYLE="font-size: 1pt; border-top: black 0.75pt solid; width: 100%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></DIV></DIV>
 <P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>
<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>UNITED STATES</B>&nbsp;</FONT></P>
<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>SECURITIES AND EXCHANGE COMMISSION</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>Washington, D.C. 20549</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
<DIV ALIGN="LEFT" STYLE="margin-top: 1pt; margin-bottom: 1pt"><DIV STYLE="font-size: 1pt; border-top: black 1pt solid; width: 100%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></DIV></DIV>
 <P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></P> <P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT
STYLE="font-family: Times New Roman, Times, Serif"><B>SCHEDULE 14A </B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>Proxy Statement Pursuant to Section 14(a) of the</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>Securities Exchange Act of 1934</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>(Amendment No.&nbsp;&nbsp;&nbsp;&nbsp;)</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
<DIV ALIGN="LEFT" STYLE="margin-top: 1pt; margin-bottom: 1pt"><DIV STYLE="font-size: 1pt; border-top: black 1pt solid; width: 100%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></DIV></DIV>
 <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">Filed by the
Registrant&nbsp;&nbsp;&#9746;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Filed by a party other than the
Registrant&nbsp;&nbsp;&#9744;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">Check the appropriate box:</FONT>&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
<TD STYLE="width: 4%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="width: 96%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Preliminary Proxy Statement</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))</B></FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Definitive Proxy Statement</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9746;</FONT></TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Definitive Additional Materials</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Soliciting Material Pursuant to &sect;240.14a-12</FONT></TD></TR> </TABLE>
<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P> <P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT
STYLE="font-family: Times New Roman, Times, Serif; font-size: 22pt"><B>ALLEGHENY TECHNOLOGIES</B></FONT></P> <P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT
STYLE="font-family: Times New Roman, Times, Serif; font-size: 22pt"><B>INCORPORATED </B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>(Name of Registrant as Specified In Its Charter)</B></FONT>&nbsp;</P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif">Payment of Filing Fee (Check the appropriate box):</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>
<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
<TD STYLE="width: 4%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="width: 4%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="width: 92%"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9746;</FONT></TD>
<TD COLSPAN="2" STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">No fee required.</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD COLSPAN="2"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD COLSPAN="2" STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Title of each class of securities to which transaction applies:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Aggregate number of securities to which transaction applies:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on
which the filing fee is calculated and state how it was determined):&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(4)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Proposed maximum aggregate value of transaction:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(5)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Total fee paid:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD COLSPAN="2"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD COLSPAN="2" STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Fee paid previously with preliminary materials.</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD COLSPAN="2"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
<TD COLSPAN="2" STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for
which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.</FONT></TD></TR>
<TR>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Amount Previously Paid:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form, Schedule or Registration Statement No.:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filing Party:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(4)</FONT></TD>
<TD STYLE="vertical-align: top"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">Date Filed:</FONT></P></TD></TR> </TABLE> <P STYLE="margin: 0">&nbsp;</P>
<P STYLE="margin: 0"></P> </DIV></CENTER>
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 <CENTER><DIV style="WIDTH: 8.5in" align=left> <P STYLE="margin: 0">&nbsp;</P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Allegheny Technologies Incorporated</B><BR> 1000 Six PPG Place<BR> Pittsburgh, Pennsylvania
15222</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif"><B>CHANGE OF LOCATION (VIRTUAL MEETING FORMAT) &mdash; ADDITIONAL INFORMATION REGARDING THE 2020 ANNUAL MEETING OF STOCKOWNERS TO BE HELD ON FRIDAY, MAY 8, 2020</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 15pt"><FONT
STYLE="font-family: Times New Roman, Times, Serif">The following Additional Information Regarding Change of Location for the 2020 Annual Meeting of Stockholders relates to the Notice of Annual Meeting and accompanying Proxy Statement of Allegheny
Technologies Incorporated (the &ldquo;Company&rdquo;), dated March 24, 2020, furnished to shareowners of the Company in connection with the solicitation of proxies by the Board of Directors of the Company for use at the 2020 Annual Meeting of
Stockholders to be held on Friday, May 8, 2020. This Supplement is being filed with the Securities and Exchange Commission and is being made available to shareowners on April 20, 2020.</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 15pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif"><B>THIS ADDITIONAL INFORMATION SHOULD BE READ IN CONJUNCTION WITH THE PROXY STATEMENT.</B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> </DIV></CENTER>
 <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Gray 3pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
<DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
 <CENTER><DIV style="WIDTH: 8.5in" align=left> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>CHANGE OF LOCATION (VIRTUAL MEETING FORMAT)</B><BR> <B>ADDITIONAL INFORMATION REGARDING</B><BR> <B>THE
2020 ANNUAL MEETING OF STOCKHOLDERS</B><BR> <B>TO BE HELD ON MAY 8, 2020</B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Dear ATI Stockholders:</B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">After careful consideration, and in light of public
health concerns regarding the coronavirus pandemic and the importance of safeguarding the health of our stockholders, employees, directors and officers, Allegheny Technologies Incorporated (the &ldquo;Company&rdquo;) has decided to forego for this
year the physical location of the 2020 Annual Meeting of Stockholders (the &ldquo;2020 Annual Meeting&rdquo;) in favor of a <B>virtual meeting format only</B>. <B>The 2020 Annual Meeting will still be held at 11:00 a.m. Central Time on May 8,
2020.</B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif"><B>As there will not be a physical location, stockholders will not be able to vote their shares in person at the 2020 Annual Meeting. The only way for stockholders to vote their shares is to submit
a proxy in advance of the meeting using one of the methods described in the proxy materials for the 2020 Annual Meeting or to attend the meeting virtually per the instructions below.</B></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We are committed to ensuring, to the extent possible, that our stockholders will be afforded the ability to participate at the virtual meeting like they would at an in-person
meeting. If you were a stockholder of record as of the close of business on March 9, 2020, the record date, or hold a legal proxy for the meeting provided by your bank, broker or nominee, you are entitled to participate in the 2020 Annual Meeting,
vote electronically and submit questions during the live webcast of the meeting by visiting </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif"><U>www.meetingcenter.io/200046429 </U><FONT STYLE="font-size: 10pt">and entering your control
number and the password, <B>ATI2020</B>. You may also submit questions in advance of and during the 2020 Annual Meeting by emailing your question, along with proof of ownership, to <U>investors@ATImetals.com</U>.</FONT></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif">To be admitted to the 2020 Annual Meeting as a &ldquo;Stockholder&rdquo; (with the option to vote your shares, examine the shareowner list and submit questions during the meeting), you must follow
specific instructions, including, for shareowners of record, entering the control number you previously received and, for beneficial owners, obtaining a legal proxy and registering in advance for the virtual meeting. Questions and answers relating
to the virtual meeting format, including specific instructions on how to be admitted to the meeting, can be found on our website at <U>www.atimetals.com/annualmeeting</U> and will be filed as additional proxy soliciting materials with the Securities
and Exchange Commission.</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif"><B>Your vote is important to us</B>. Whether or not you plan to participate in the live webcast of the 2020 Annual Meeting, we urge you to vote and submit your proxy in advance of the meeting by one
of the methods described in the proxy materials for the 2020 Annual Meeting. The proxy card included with the proxy materials previously distributed will not be updated to reflect the virtual meeting format and may continue to be used to vote your
shares in connection with the 2020 Annual Meeting. If you have already submitted your proxy, there is no need to submit another proxy or vote at the 2020 Annual Meeting unless you wish to change or revoke your vote.</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">A list of stockholders of record as of the record date will continue to be available upon request at our corporate headquarters for inspection by stockholders for any purpose
germane to the meeting from April 28 through May 7, 2020. The list will also be available to shareowners at </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif"><U>www.meetingcenter.io/200046429 </U><FONT STYLE="font-size: 10pt">during
the live webcast of the 2020 Annual Meeting.</FONT></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">We look forward to your participation at our virtual 2020 Annual Meeting.</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif">April 20, 2020<BR> By Order of the Board of Directors</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">
<IMG SRC="g915764img002_v1.jpg" ALT=""><BR> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Elliot S. Davis </FONT><BR> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Secretary</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT
STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>The 2020 Annual Meeting on May 8, 2020 at 11:00 a.m. Central Time is available at
</B></FONT><FONT STYLE="font-family: Times New Roman, Times, Serif"><U>www.meetingcenter.io/200046429</U><FONT STYLE="font-size: 10pt"><B>. </B>ATI&rsquo;s Proxy Statement and Annual Report on Form 10-K for the year ended December 31, 2019 are
available at <U>www.envisionreports.com/ati</U>. Additionally, you may access our proxy materials on our 2020 Annual Meeting website at <U>www.atimetals.com/annualmeeting</U>. </FONT></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P> </DIV></CENTER> </BODY></HTML>
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