ATI director plans $501K sale of 2,485 shares

ATI INC director David J. Morehouse filed a Rule 144 notice to sell 2,485 ATI common shares valued at about $501,003, acquired via restricted stock vesting.

Rhea-AI Filing Summary

ATI INC (ATI) received a Rule 144 notice that director David J. Morehouse intends to sell 2,485 shares of ATI common stock through Fidelity Brokerage Services LLC on the NYSE. The filing lists an aggregate market value of $501,002.70 for these shares and shows 136,170,383 ATI common shares outstanding.

The shares to be sold were acquired as restricted stock vesting from the issuer on May 20, 2026 as compensation. The notice indicates no ATI common stock sales for this account during the prior three months.

Key Figures

Shares proposed to be sold: 2,485 shares Aggregate market value of shares: $501,002.70 ATI common shares outstanding: 136,170,383 shares +3 more

6 metrics

Shares proposed to be sold 2,485 shares ATI INC common stock under a Rule 144 notice for David J. Morehouse

Aggregate market value of shares $501,002.70 Value of the 2,485 ATI INC common shares covered by the Rule 144 notice

ATI common shares outstanding 136,170,383 shares Outstanding ATI INC common stock as listed in the Form 144

Acquisition date of shares May 20, 2026 Date the 2,485 shares were acquired via restricted stock vesting as compensation

Number of shares acquired 2,485 shares Shares acquired from the issuer through restricted stock vesting on May 20, 2026

Notice date September 2, 2026 Date associated with the Form 144 remarks and signature block

Key Terms

Rule 144, restricted stock vesting, aggregate market value, attorney-in-fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock vesting financial

"Common | 05/20/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

aggregate market value financial

"Common | Fidelity Brokerage Services LLC ... | 2485 | 501002.70"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for David Morehouse"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for ATI (ATI)?

The filing discloses that director David J. Morehouse has filed a Rule 144 notice for a proposed sale of 2,485 shares of ATI INC common stock through Fidelity Brokerage Services LLC on the NYSE, with an aggregate market value of $501,002.70.

How many ATI (ATI) shares are covered by David Morehouse’s Rule 144 notice?

The notice covers a proposed sale of 2,485 shares of ATI INC common stock. These shares are held at Fidelity Brokerage Services LLC and are the only shares listed in the filing as securities to be sold under this Rule 144 notice.

What is the reported market value of the ATI (ATI) shares in this Form 144?

The Form 144 lists an aggregate market value of $501,002.70 for the 2,485 ATI common shares proposed to be sold. This figure reflects the value used for the Rule 144 notice and is tied to the specific block of shares in the filing.

How were the ATI (ATI) shares to be sold by David Morehouse acquired?

The shares were acquired as restricted stock vesting from ATI INC on May 20, 2026, categorized as compensation. The filing identifies the issuer as the source of these shares and labels the acquisition type as restricted stock vesting.

How many ATI (ATI) common shares are outstanding according to this Form 144?

The Form 144 lists 136,170,383 ATI INC common shares as outstanding. This figure appears with the class of securities information and serves as the outstanding share baseline for the Rule 144 disclosure.

Were there any ATI (ATI) shares sold by this person in the past three months?

The section for Securities Sold During The Past 3 Months contains no entries for ATI INC shares, indicating that the filing does not report any ATI common stock sales for this account in the prior three-month period.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/02/2026 - 02:43 PM EDT Accepted by SEC EDGAR 09/02/2026 - 02:42 PM EDT Learn about SEC filing dates

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	0001635153
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ATI INC
SEC File Number	001-12001
Address of Issuer	2021 MCKINNEY AVENUE DALLAS TEXAS 75201
Phone	4123942800
Name of Person for Whose Account the Securities are To Be Sold	Morehouse David J
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	Director

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	2485	501002.70	136170383	09/02/2026	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	05/20/2026	Restricted Stock Vesting	Issuer			2485	05/20/2026	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	09/02/2026
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	/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for David Morehouse
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)