<SEC-DOCUMENT>0001193125-23-210742-index.html : 20230811
<SEC-HEADER>0001193125-23-210742.hdr.sgml : 20230811
<ACCEPTANCE-DATETIME>20230811161554
ACCESSION NUMBER:		0001193125-23-210742
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		16
CONFORMED PERIOD OF REPORT:	20230807
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20230811
DATE AS OF CHANGE:		20230811

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ATI 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:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12001
		FILM NUMBER:		231164315

	BUSINESS ADDRESS:	
		STREET 1:		2021 MCKINNEY AVENUE
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201
		BUSINESS PHONE:		4123942800

	MAIL ADDRESS:	
		STREET 1:		2021 MCKINNEY AVENUE
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGHENY TECHNOLOGIES INC
		DATE OF NAME CHANGE:	19991213

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGHENY TELEDYNE INC
		DATE OF NAME CHANGE:	19960716
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d538851d8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: d538851d8k.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-1.1 <SEQUENCE>2 <FILENAME>d538851dex11.htm <DESCRIPTION>EX-1.1 <TEXT> Document 2 - file: d538851dex11.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-4.2 <SEQUENCE>3 <FILENAME>d538851dex42.htm <DESCRIPTION>EX-4.2 <TEXT> Document 3 - file: d538851dex42.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.1 <SEQUENCE>4 <FILENAME>d538851dex51.htm <DESCRIPTION>EX-5.1 <TEXT> Document 4 - file: d538851dex51.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>5 <FILENAME>ati-20230807.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA <TEXT> Document 5 - file: ati-20230807.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>6 <FILENAME>ati-20230807_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE <TEXT> Document 6 - file: ati-20230807_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>7 <FILENAME>ati-20230807_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE <TEXT> Document 7 - file: ati-20230807_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>g538851page63a.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 8 - file: g538851page63a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>9 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 9 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>10 <FILENAME>d538851d8k_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 10 - file: d538851d8k_htm.html
Document 10 - RAW XML: d538851d8k_htm.xml
</DOCUMENT> <DOCUMENT> <TYPE>EXCEL <SEQUENCE>11 <FILENAME>Financial_Report.xlsx <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 11 - file: Financial_Report.xlsx
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>12 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 12 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>13 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 13 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>14 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 14 - file: FilingSummary.html
Document 14 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>17 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 17 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>18 <FILENAME>0001193125-23-210742-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 18 - file: 0001193125-23-210742-xbrl.zip
</DOCUMENT> </SEC-DOCUMENT>