[144] ATI INC SEC Filing

Rhea-AI Filing Summary

ATI (Form 144): A shareholder filed notice to sell up to 10,543 shares of common stock through Fidelity Brokerage Services on the NYSE, with an approximate sale date of 11/04/2025. The filing lists an aggregate market value of $1,012,866.01 for the proposed sale.

The shares were acquired on 01/04/2024 via restricted stock vesting from the issuer as compensation. Shares outstanding were 135,863,661 at the time noted in the filing; this is a baseline figure, not the amount being sold.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	10543	1012866.01	135863661	11/04/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/04/2024	Restricted Stock Vesting	Issuer			10543	01/04/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does ATI's Form 144 filing disclose?

A holder plans to sell up to 10,543 shares of ATI common stock on the NYSE, with an approximate sale date of 11/04/2025.

What is the aggregate market value of the shares in ATI's Form 144?

The filing lists an aggregate market value of $1,012,866.01 for the proposed sale.

How were the ATI shares being sold acquired?

They were acquired on 01/04/2024 via restricted stock vesting from the issuer as compensation.

Who is the broker for the proposed ATI share sale?

The broker is Fidelity Brokerage Services LLC (Smithfield, RI).

On which exchange will the ATI shares be sold?

The filing names the NYSE as the exchange.

How many ATI shares are outstanding, per the filing?

Shares outstanding were 135,863,661 as noted in the filing.