ATI Inc (NYSE: ATI) insider may pursue multimillion-dollar stock sale

Rhea-AI Filing Summary

ATI reporting person Kimberly A. Fields filed a Form 144 indicating an intention to sell up to 34,823 shares of ATI common stock held at Fidelity Brokerage Services, linked to a value of $8,021,826.28 with a reference date of 08/17/2026 on the NYSE.

The filing also lists prior restricted stock vesting events in 2023 and 2025 and details multiple ATI common stock sales by Fields during June and July 2026, including individual transactions of 59,749 shares on 06/02/2026 and 40,000 shares on 07/07/2026.

Key Figures

Planned shares to be sold: 34,823 shares Aggregate value of planned sale: $8,021,826.28 Sale 06/02/2026: 59,749 shares for $10,699,079.13 +5 more

8 metrics

Planned shares to be sold 34,823 shares Maximum ATI common shares indicated for potential sale on Form 144

Aggregate value of planned sale $8,021,826.28 Aggregate market value linked to 34,823 ATI shares

Sale 06/02/2026 59,749 shares for $10,699,079.13 ATI common stock sold by Kimberly A. Fields during past 3 months

Sale 07/07/2026 40,000 shares for $7,316,298.32 ATI common stock sold by Kimberly A. Fields during past 3 months

Restricted stock vesting 01/04/2023 12,771 shares ATI restricted stock vesting as compensation from issuer

Restricted stock vesting 02/23/2023 7,160 shares ATI restricted stock vesting as compensation from issuer

Restricted stock vesting 01/03/2025 6,919 shares ATI restricted stock vesting as compensation from issuer

Restricted stock vesting 01/04/2025 7,973 shares ATI restricted stock vesting as compensation from issuer

Key Terms

Form 144, restricted stock vesting, aggregate value, compensation

4 terms

Form 144 regulatory

"Kimberly A. Fields filed a Form 144 indicating an intention"

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 | 01/04/2023 | 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 value financial

"linked to a value of $8,021,826.28 with a reference date"

compensation financial

"01/04/2025 | Restricted Stock Vesting | Issuer | | | 7973 |"

FAQ

What does ATI's Form 144 filing by Kimberly A. Fields disclose?

The Form 144 for ATI discloses that Kimberly A. Fields may sell up to 34,823 common shares. It also lists several prior ATI stock sales in June–July 2026 and earlier restricted stock vesting events in 2023 and 2025.

How many ATI shares does Kimberly A. Fields plan to sell under this Form 144?

The filing indicates a potential sale of up to 34,823 ATI common shares. This amount is associated with an aggregate value of $8,021,826.28 and a reference date of 08/17/2026 for potential NYSE transactions.

What ATI stock sales has Kimberly A. Fields made in the past three months?

The Form 144 shows ATI common stock sales including 59,749 shares on 06/02/2026 and 40,000 shares on 07/07/2026. Additional sales occurred on 06/22, 06/23, 06/24, and 07/28/2026 in smaller share amounts.

What is the aggregate market value tied to Kimberly A. Fields’ planned ATI share sale?

The potential sale of 34,823 ATI shares is tied to an aggregate value of $8,021,826.28. This figure reflects the market valuation used in the Form 144 and is associated with NYSE trading through Fidelity Brokerage Services.

What restricted stock vesting events for ATI are noted in the Form 144?

The filing lists ATI restricted stock vesting events on 01/04/2023 (12,771 shares), 02/23/2023 (7,160 shares), 01/03/2025 (6,919 shares), and 01/04/2025 (7,973 shares). Each vesting is identified as compensation from the issuer.

On which exchange are the ATI shares in Kimberly A. Fields’ Form 144 associated with trading?

The Form 144 associates the 34,823 ATI common shares with trading on the NYSE. The securities are held at Fidelity Brokerage Services, with the reference date 08/17/2026 for the planned transactions.

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

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Available on EDGAR 08/17/2026 - 12:57 PM Accepted by SEC EDGAR 08/17/2026 - 12:56 PM 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
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	34823	8021826.28	136170383	08/17/2026	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	01/04/2023	Restricted Stock Vesting	Issuer			12771	01/04/2023	Compensation
Common	02/23/2023	Restricted Stock Vesting	Issuer			7160	02/23/2023	Compensation
Common	01/03/2025	Restricted Stock Vesting	Issuer			6919	01/03/2025	Compensation
Common	01/04/2025	Restricted Stock Vesting	Issuer			7973	01/04/2025	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	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
Kimberly A. Fields 2021 McKinney Avenue Dallas TX 75201	Common	07/28/2026	31757	6065269.43

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)