ATI insider Form 144 details 10,542-share NYSE stock sale

Rhea-AI Filing Summary

ATI has a Form 144 notice for a planned sale of 10,542 shares of common stock through Fidelity Brokerage Services on the NYSE, with an approximate sale date of 11/25/2025. These shares were acquired on 01/09/2024 through restricted stock vesting as compensation. The form reports that 135,863,661 shares of this class were outstanding. Over the prior three weeks in November 2025, the same seller, Timothy Harris, reported three sales of common stock totaling 31,628 shares with aggregate gross proceeds of about $3.07 million.

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	10542	1041760.44	135863661	11/25/2025	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	01/09/2024	Restricted Stock Vesting	Issuer			10542	01/09/2024	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Timothy Harris 2021 McKinney Avenue Dallas TX 75201	Common	11/04/2025	10543	1012866.01
Timothy Harris 2021 McKinney Avenue Dallas TX 75201	Common	11/11/2025	10543	1029945.67
Timothy Harris 2021 McKinney Avenue Dallas TX 75201	Common	11/18/2025	10542	1030691.34

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 latest Form 144 filing disclose?

The Form 144 filing for ATI discloses a planned sale of 10,542 shares of common stock on the NYSE through Fidelity Brokerage Services LLC, with an approximate sale date of 11/25/2025.

How many ATI shares are covered by the new Form 144 notice?

The notice covers a proposed sale of 10,542 shares of ATI common stock, as listed in the section for the number of shares or other units to be sold.

How were the ATI shares in the Form 144 acquired?

The 10,542 shares in the Form 144 were acquired on 01/09/2024 through a restricted stock vesting transaction from the issuer, with the nature of payment described as compensation.

How many ATI shares are outstanding according to the Form 144?

The Form 144 lists 135,863,661 shares of ATI common stock as the number of shares or other units outstanding for this class of securities.

What ATI stock sales has the same seller reported in the past 3 months?

Over the past 3 months, Timothy Harris reported three ATI common stock sales: 10,543 shares on 11/04/2025, 10,543 shares on 11/11/2025, and 10,542 shares on 11/18/2025, with gross proceeds of 1,012,866.01, 1,029,945.67, and 1,030,691.34 respectively.

On which exchange are the ATI shares in the Form 144 expected to trade?

The Form 144 identifies the NYSE as the securities exchange for the ATI common stock covered by the planned 10,542-share sale.