ATI insider sale: Kimberly Fields sells 21,154 shares at $82.03

Rhea-AI Filing Summary

Kimberly A. Fields, who serves as President, CEO and Director of ATI Inc (ATI), reported a sale of 21,154 shares of common stock on 10/06/2025 at a price of $82.03 per share. The filing shows 223,821 shares remain beneficially owned after the transaction. The sale was executed under a 10b5-1 trading plan dated 6/11/2025, which the filing says was established for personal tax and estate planning purposes. The Form 4 was signed by an attorney-in-fact on 10/08/2025.

Positive

• Sale executed under a documented 10b5-1 plan, providing an affirmative defense and reducing timing concerns
• Purpose disclosed as personal tax and estate planning, offering clear intent for the transaction

Negative

• CEO sold 21,154 shares, which reduces insider ownership and may be perceived as liquidity-taking
• Transaction at $82.03 removes that notional value from the CEO's equity stake

Insights

Corporate Governance Analyst

CEO executed a preplanned sale of 21,154 shares under a 10b5-1 plan.

The transaction is a non-derivative sale of 21,154 common shares at $82.03 on 10/06/2025, reducing beneficial ownership to 223,821 shares. The filing explicitly states the sale was made pursuant to a 10b5-1 trading plan dated 6/11/2025 and cites personal tax and estate planning as the purpose.

The use of a documented 10b5-1 plan typically lowers execution timing risk and provides an affirmative defense against insider trading claims when conditions are met; investors may observe insider liquidity but should not infer operational issues from a single preplanned sale. Monitor subsequent Form 4 filings over the next 3-12 months for additional pattern changes in insider selling or shifts in ownership that could affect governance signaling.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Fields Kimberly A

(Last) (First) (Middle)

C/O ATI INC.

2021 MCKINNEY AVE., SUITE 1100

(Street)

DALLAS TX 75201

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ATI INC [ ATI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President, CEO and Director

3. Date of Earliest Transaction (Month/Day/Year)
10/06/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.10 per share	10/06/2025		S		21,154(1)	D	$82.03	223,821	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares sold pursuant to a 10b5-1 Trading Plan dated June 11, 2025 entered into for personal tax and estate planning purposes.

	/s/ Amanda J. Skov, Attorney-in-Fact for Kimberly A. Fields	10/08/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did ATI (ATI) insider Kimberly A. Fields sell on 10/06/2025?

She sold 21,154 shares of ATI common stock on 10/06/2025 at $82.03 per share.

How many ATI shares does Kimberly A. Fields own after the sale?

The filing reports 223,821 shares beneficially owned following the reported transaction.

Was the sale part of a trading plan or a one-off transaction?

The sale was made pursuant to a 10b5-1 trading plan dated 6/11/2025 established for personal tax and estate planning purposes.

When was the Form 4 for this transaction filed?

The Form 4 shows a signature date of 10/08/2025 by an attorney-in-fact.

What is the role of the reporting person at ATI?

The reporting person, Kimberly A. Fields, is listed as President, CEO and Director of ATI.