Timothy J. Harris - 25 Nov 2025 Form 4 Insider Report for ATI INC (ATI)

Signature
/s/ Amanda J. Skov, Attorney-in-Fact for Timothy J. Harris
Issuer symbol
ATI
Transactions as of
25 Nov 2025
Net transactions value
-$1,031,851
Form type
4
Filing time
25 Nov 2025, 20:08:48 UTC
Previous filing
20 Nov 2025
Next filing
09 Dec 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Harris Timothy J Senior VP and CDIO C/O ATI INC., 2021 MCKINNEY AVE., SUITE 1100, DALLAS /s/ Amanda J. Skov, Attorney-in-Fact for Timothy J. Harris 25 Nov 2025 0001776844

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ATI Common Stock, par value $0.10 per share Sale $1,031,851 -10,542 -9.7% $97.88 98,310 25 Nov 2025 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Shares sold pursuant to a 10b5-1 Plan dated August 6, 2025.