[144] ATI INC SEC Filing

Rhea-AI Filing Summary

Notice of proposed sale under Rule 144 by an insider of ATI. The filing reports an intended sale of 21,154 shares of common stock through Fidelity Brokerage Services LLC with an aggregate market value of $1,735,262.62 based on the filing. The shares were acquired on 01/09/2024 through restricted stock vesting and were paid as compensation. The approximate sale date listed is 10/06/2025 on the NYSE. The filing also discloses two prior sales by the same person in the past three months: 15,941 shares sold on 09/09/2025 for $1,235,746.32 and 20,312 shares sold on 09/22/2025 for $1,631,662.96. The filer certifies no undisclosed material adverse information and includes the standard Rule 10b5-1 notice language.

Positive

• None.

Negative

• Planned insider sale of 21,154 shares valued at $1,735,262.62 on 10/06/2025
• Two recent sales in 09/2025 totaling 36,253 shares for $2,867,409.28 signal continued insider dispositions

Insights

Equity Analyst

Insider selling: planned sale of 21,154 shares (~$1.74M) after recent September disposals.

The filing shows an insider intends to sell $1,735,262.62 worth of common stock on 10/06/2025; the shares were acquired via restricted stock vesting on 01/09/2024 and were paid as compensation. Two earlier dispositions in 09/2025 totaling 36,253 shares generated gross proceeds of $2,867,409.28.

This pattern is relevant to liquidity and insider supply but does not, by itself, indicate company performance. Watch for any additional Form 4/144 filings or announced trading plans near 10/2025 that would clarify whether sales follow a systematic plan or ad-hoc dispositions.

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

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	21154	1735262.62	137832132	10/06/2025	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			21154	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
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	09/09/2025	15941	1235746.32
Kimberly A. Fields 2021 McKinney Avenue Dallas RI 75201	Common	09/22/2025	20312	1631662.96

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 the ATI (ATI) Form 144 disclose about the planned sale?

It discloses a proposed sale of 21,154 common shares with an aggregate market value of $1,735,262.62, to be sold through Fidelity Brokerage Services LLC on or about 10/06/2025.

How were the shares being sold by the ATI insider acquired?

The shares were acquired on 01/09/2024 through restricted stock vesting and the payment type is listed as compensation.

Has the insider sold ATI shares recently?

Yes. The filing lists sales of 15,941 shares on 09/09/2025 for $1,235,746.32 and 20,312 shares on 09/22/2025 for $1,631,662.96.

Through which broker will the ATI shares be sold?

The notice lists Fidelity Brokerage Services LLC (address shown) as the broker for the proposed sale.

Does the Form 144 include any Rule 10b5-1 trading plan date?

No specific plan adoption date or trading-instruction date is provided in the filing; the form includes the standard Rule 10b5-1 notice language but no adoption date is shown.