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ATI INC

For the period ended Sep 27, 2026. Filed Oct 29, 2026.

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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.

Sep 27, 2026 · Filed Oct 29, 2026

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

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Item 4. Controls and Procedures

Item 4.Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures

Our Chief Executive Officer and Chief Financial Officer have evaluated the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of September 27, 2026, and they concluded that these disclosure controls and procedures are effective.

(b) Changes in Internal Controls

There was no change in our internal controls over financial reporting identified in connection with the evaluation of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of September 27, 2026 conducted by our Chief Executive Officer and Chief Financial Officer, that occurred during the quarter ended September 27, 2026 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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