ATI INC

For the period ended Mar 31, 2024. Filed Apr 30, 2024.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2024 · Filed Apr 30, 2024

ATI$184.85+5.2%Stored close · as of Nov 9, 2026

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Contents

Item 6. Exhibits

(a) Exhibits

10.1	Retirement, Transition and Release Agreement, dated January 8, 2024, by and between the Company and Elliot S. Davis (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K dated January 10, 2024 (File No. 1-12002)).*
10.2	Form of 2024 Time-Vested Restricted Stock Unit Agreement (incorporated by reference to Exhibit 10.14 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2023).*
10.3	Form of 2024 Performance-Vested Restricted Stock Unit Agreement (incorporated by reference to Exhibit 10.15 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2023).*
10.4	Executive Severance Plan (incorporated by reference to Exhibit 10.16 to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2023).*
31.1	Certification of Chief Executive Officer required by Securities and Exchange Commission Rule 13a – 14(a) or 15d – 14(a) (filed herewith).
31.2	Certification of Chief Financial Officer required by Securities and Exchange Commission Rule 13a – 14(a) or 15d – 14(a) (filed herewith).
32.1	Certification pursuant to 18 U.S.C. Section 1350 (furnished herewith).
101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document.
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104	Cover Page Interactive Data File - the cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.

*Management contract or compensatory plan or arrangement required to be filed as an Exhibit to this Report.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

ATI INC.

(Registrant)

Date:	April 30, 2024	By	/s/ Donald P. Newman
			Donald P. Newman
			Executive Vice President, Finance and Chief Financial Officer(Principal Financial Officer)
Date:	April 30, 2024	By	/s/ Michael B. Miller
			Michael B. Miller
			Vice President, Controller and Chief Accounting Officer(Principal Accounting Officer)

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.