1 unchanged sentence
Rule 10b5-1 Plan Elections
−Removed: During the fiscal quarter ended June 29, 2025, Kimberly A.
−Removed: Fields , the Company’s Chief Executive Officer , entered into a pre-arranged stock trading plan on June 12, 2025 , which provides for the potential sale of up to 78,560 shares of the Company’s common stock between September 9, 2025 and October 24, 2025 for her personal tax and estate planning purposes.
−Removed: This trading plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense criteria articulated by Rule 10b5-1(c) under the Securities Exchange Act of 1934, as amended, as well as the Company’s policies and procedures pertaining to transactions in Company securities.
−Removed: 3.1 Fifth Amended and Restated Bylaws of ATI Inc.
−Removed: (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K, dated May 21, 2025 ) .
−Removed: 10.1 Second Amended and Restated Revolving Credit, Term Loan, Delayed Draw Term Loan and Security Agreement, dated as of June 13, 2025, by and among the Borrowers party thereto, the Company and other Guarantors party thereto, the Lenders party thereto and PNC Bank, National Association, as Lender and Agent (filed herewith).*
+Added: During the fiscal quarter ended September 28, 2025, Robert S.
+Added: Wetherbee , the Company’s Executive Chairman , entered into a pre-arranged stock trading plan on August 15, 2025 , which provides for the potential sale of up to 300,000 shares of the Company’s common stock between November 18, 2025 and August 14, 2026 for his personal tax and estate planning purposes.
+Added: Additionally, Timothy J.
+Added: Harris , the Company’s Senior Vice President and Chief Digital and Information Officer , entered into a pre-arranged stock trading plan on August 6, 2025 , which provides for the potential sale of up to 42,170 shares of the Company’s common stock between November 4, 2025 and January 30, 2026 for his personal tax and estate planning purposes.
+Added: These trading plans were entered into during an open insider trading window and are intended to satisfy the affirmative defense criteria articulated by Rule 10b5-1(c) under the Securities Exchange Act of 1934, as amended, as well as the Company’s policies and procedures pertaining to transactions in Company securities.
+Added: 10.1 Rece ivab l es Purchase and Financing Agreement, dated as of September 1 9 , 2025, by and among the ATI Securitization LLC, the Purchasers and L enders from time to time party ther eto, ATI Specialty Materials LLC, PNC Bank, National Association, as Administrative Agent, and PNC Capital Markets LLC, as Structuring A gent (filed herewith).*
+Added: 10.2 First Tier Purchase and Sale Agreement, dated as of September 19, 2025, b etween ATI Specialty Materials LLC, as Servicer and ATI Securitization Holdings LLC (filed herewith).
+Added: 10.3 Second Tier Purchase and Sale Agreement, dated as of September 19, 2025, between ATI Specialty Materials LLC, as Servicer , ATI Securitization Holdings LLC and ATI Securitization LLC (filed herewith).
+Added: 10.4 Retirement and Consulting Agreement, date d as of October 27, 2025 , between the Company and Donal d P.
+Added: Newman (filed herewith).
31.1 Certification of Chief Executive Officer required by Securities and Exchange Commission Rule 13a – 14(a) or 15d – 14(a) (filed herewith).
12 unchanged sentences
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.
−Removed: July 31, 2025 By /s/ Donald P.
+Added: October 28, 2025 By /s/ Donald P.
Executive Vice President, Finance and Chief Financial Officer
(Principal Financial Officer)
−Removed: July 31, 2025 By /s/ Michael B.
+Added: October 28, 2025 By /s/ Michael B.
Vice President, Controller and Chief Accounting Officer
1 unchanged sentence
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.