<SEC-DOCUMENT>0001193125-24-044462-index.html : 20240223
<SEC-HEADER>0001193125-24-044462.hdr.sgml : 20240223
<ACCEPTANCE-DATETIME>20240223155834
ACCESSION NUMBER:		0001193125-24-044462
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		13
FILED AS OF DATE:		20240223
DATE AS OF CHANGE:		20240223
EFFECTIVENESS DATE:		20240223

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ATI INC
		CENTRAL INDEX KEY:			0001018963
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL PIPE & TUBES [3317]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				251792394
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-277308
		FILM NUMBER:		24670986

	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>S-3ASR
<SEQUENCE>1
<FILENAME>d774902ds3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: d774902ds3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.8
<SEQUENCE>2
<FILENAME>d774902dex48.htm
<DESCRIPTION>EX-4.8
<TEXT>
Document 2 - file: d774902dex48.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>3
<FILENAME>d774902dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 3 - file: d774902dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>d774902dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 4 - file: d774902dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.1
<SEQUENCE>5
<FILENAME>d774902dex251.htm
<DESCRIPTION>EX-25.1
<TEXT>
Document 5 - file: d774902dex251.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.2
<SEQUENCE>6
<FILENAME>d774902dex252.htm
<DESCRIPTION>EX-25.2
<TEXT>
Document 6 - file: d774902dex252.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>7
<FILENAME>d774902dexfilingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 7 - file: d774902dexfilingfees.htm

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<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g774902g18n73.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g774902g18n73.jpg

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<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g774902g92i27.jpg
<DESCRIPTION>GRAPHIC
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Document 9 - file: g774902g92i27.jpg

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<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g774902snap1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g774902snap1.jpg

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<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g774902snap10.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g774902snap10.jpg

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<SEQUENCE>12
<FILENAME>g774902snap4.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g774902snap4.jpg

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<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g774902snap9.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g774902snap9.jpg

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