ATI (NYSE: ATI) insider files to sell 31,757 shares of common stock

Rhea-AI Filing Summary

ATI reporting person Kimberly A. Fields filed a notice to sell up to 31,757 shares of common stock through Fidelity Brokerage Services LLC, with an aggregate market value of $6,065,269.43, based on 136,470,427 shares outstanding, for a planned sale on 07/28/2026 on the NYSE.

The filing also notes that the 31,757 shares arose from restricted stock vesting on 01/06/2025 and discloses prior common stock sales in the last three months, including 40,000 shares on 05/11/2026 and 59,749 shares on 06/02/2026, among additional smaller transactions in June and July 2026.

Key Figures

Shares to be sold: 31,757 shares Aggregate market value of planned sale: $6,065,269.43 Shares outstanding: 136,470,427 shares +5 more

8 metrics

Shares to be sold 31,757 shares Planned ATI common stock sale under Form 144

Aggregate market value of planned sale $6,065,269.43 Value of 31,757 ATI shares to be sold

Shares outstanding 136,470,427 shares ATI common shares outstanding at time of notice

Planned sale date 07/28/2026 Expected date of ATI share sale on NYSE

Restricted stock vesting date 01/06/2025 Date the 31,757 ATI shares vested as compensation

Sale on 05/11/2026 40,000 shares; $6,368,283.35 ATI common stock sold by Kimberly A. Fields

Sale on 06/02/2026 59,749 shares; $10,699,079.13 ATI common stock sold by Kimberly A. Fields

Sale on 07/07/2026 40,000 shares; $7,316,298.32 ATI common stock sold by Kimberly A. Fields

Key Terms

Form 144, Restricted Stock Vesting, aggregate market value

3 terms

Form 144 regulatory

"144: Securities Information Common | Fidelity Brokerage Services LLC"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Vesting financial

"Common | 01/06/2025 | 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 ... | 31757 | 6065269.43"

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.

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

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Available on EDGAR 07/28/2026 - 10:31 AM Accepted by SEC EDGAR 07/28/2026 - 10:31 AM Learn about SEC filing dates

FAQ

What stock sale is disclosed for ATI in this Form 144 filing?

The filing discloses a planned sale of 31,757 shares of ATI common stock, with an aggregate market value of $6,065,269.43, expected to be sold on 07/28/2026 on the NYSE.

Who is the reporting person in ATI’s Form 144 and what is the security?

The reporting person is Kimberly A. Fields, and the security involved is ATI common stock. The shares are to be sold through Fidelity Brokerage Services LLC on the NYSE.

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

The filing states there are 136,470,427 shares of ATI common stock outstanding. This figure provides context for the relative size of the planned 31,757-share sale under the Form 144 notice.

What is the origin of the ATI shares being sold by Kimberly A. Fields?

The 31,757 ATI shares planned for sale are reported as arising from Restricted Stock Vesting dated 01/06/2025, with the issuer identified as the source under a compensation-related vesting event.

What recent ATI stock sales by Kimberly A. Fields are listed in the past 3 months?

The filing lists several recent sales, including 40,000 shares on 05/11/2026, 59,749 shares on 06/02/2026, 13,269 shares on 06/22/2026, and additional smaller transactions in June and July 2026.

What was the value of recent ATI sales by Kimberly A. Fields on 07/07/2026?

On 07/07/2026, Kimberly A. Fields is reported to have sold 40,000 shares of ATI common stock for total proceeds of $7,316,298.32, as part of the three-month transaction history.

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	31757	6065269.43	136470427	07/28/2026	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	01/06/2025	Restricted Stock Vesting	Issuer			31757	01/06/2025	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	05/11/2026	40000	6368283.35
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	06/02/2026	59749	10699079.13
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	06/22/2026	13269	2686707.12
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	06/23/2026	3641	719024.68
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	06/24/2026	3783	746045.43
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	07/07/2026	40000	7316298.32

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)