ATI Form 4 shows Senior VP and CDIO stock sale under 10b5-1

Rhea-AI Filing Summary

ATI Inc. (ATI) Senior VP and CDIO reports stock sale under a pre-set plan. Officer Timothy J. Harris sold 10,542 shares of ATI common stock on 11/25/2025 at a price of $97.88 per share in an open market transaction coded as a sale. After this transaction, he beneficially owns 98,310 ATI shares directly.

The filing notes that the shares were sold pursuant to a Rule 10b5-1 trading plan dated August 6, 2025, which is a pre-arranged program allowing scheduled trades of company stock. The report is filed by one reporting person and reflects a routine insider transaction disclosure rather than a change in company operations or strategy.

Insider Trade Summary

Net Seller: 10,542 shares ($1,031,851)

Net Sell 1 txn

Insider Harris Timothy J

Role Senior VP and CDIO

Sold 10,542 shs ($1.03M)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.10 per share	10,542	$97.88	$1.03M

Holdings After Transaction: Common Stock, par value $0.10 per share — 98,310 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

Harris Timothy J

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Senior VP and CDIO

3. Date of Earliest Transaction (Month/Day/Year)
11/25/2025

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	11/25/2025		S		10,542(1)	D	$97.88	98,310	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 Plan dated August 6, 2025.

	/s/ Amanda J. Skov, Attorney-in-Fact for Timothy J. Harris	11/25/2025
	** 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 insider transaction did ATI (ATI) disclose in this Form 4?

The filing reports that Senior VP and CDIO Timothy J. Harris sold 10,542 shares of ATI common stock on 11/25/2025 in an open market sale.

At what price were the ATI shares sold by the executive?

The reported sale price for the ATI common stock was $97.88 per share for the 10,542 shares sold.

How many ATI shares does the reporting person own after the transaction?

Following the reported sale, the filing shows that the executive beneficially owns 98,310 shares of ATI common stock, held directly.

What is the role of the insider involved in this ATI Form 4?

The reporting person is an officer of ATI Inc., serving as Senior VP and CDIO, as indicated in the relationship section of the filing.

Was the ATI insider sale made under a Rule 10b5-1 plan?

Yes. The explanation states that the 10,542 shares were sold pursuant to a 10b5-1 Plan dated August 6, 2025, which is a pre-arranged trading plan.

Is this ATI Form 4 filed by more than one reporting person?

No. The form indicates it is filed by one reporting person, not a group filing.