ATI Inc. (NYSE: ATI) director sells 6,609 shares, retains stake

Rhea-AI Filing Summary

ATI Inc. director David J. Morehouse reported selling a total of 6,609 shares of ATI common stock in open-market transactions on 2026-03-09. The sales occurred in two blocks: 1,285 shares at a weighted average price of $153.11 and 5,324 shares at a weighted average price of $154.53, each executed across multiple trades within disclosed price ranges. Following these transactions, he directly holds 38,168.4028 shares of ATI common stock.

Insider Trade Summary

Net Seller: 6,609 shares ($1,019,464)

Net Sell 2 txns

Insider Morehouse David J

Role Director

Sold 6,609 shs ($1.02M)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.10 per share	1,285	$153.11	$197K
Sale	Common Stock, par value $0.10 per share	5,324	$154.53	$823K

Holdings After Transaction: Common Stock, par value $0.10 per share — 43,492.403 shares (Direct)

Footnotes (1)

1. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $152.77 to to $153.53. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each specific price within the range reported. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $154.31 to to $154.81. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

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).

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^*

Morehouse David J

(Last) (First) (Middle)

C/O ATI INC.

2021 MCKINNEY AVENUE, 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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

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	03/09/2026		S		1,285	D	$153.11(1)	43,492.4028	D
Common Stock, par value $0.10 per share	03/09/2026		S		5,324	D	$154.53(2)	38,168.4028	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. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $152.77 to to $153.53. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each specific price within the range reported.

2. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $154.31 to to $154.81. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

	/s/ Amanda J. Skov, Attorney-in-Fact for David J. Morehouse	03/11/2026
	** 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 for David J. Morehouse?

ATI reported that director David J. Morehouse sold 6,609 shares of common stock in open-market transactions. The sales were split into two blocks and occurred on 09 March 2026, as shown in the Form 4 filing.

At what prices did ATI director David J. Morehouse sell his shares?

David J. Morehouse sold 1,285 ATI shares at a weighted average price of $153.11 and 5,324 shares at a weighted average price of $154.53. Both prices reflect multiple trades within narrow disclosed ranges.

How many ATI shares does David J. Morehouse hold after the reported sale?

After selling 6,609 ATI shares, David J. Morehouse directly holds 38,168.4028 shares of ATI common stock. This post-transaction ownership figure is taken directly from the Form 4 transaction details.

What type of transaction was reported in ATI’s Form 4 filing?

The Form 4 shows open-market sales of ATI common stock by director David J. Morehouse, coded as “S.” These are standard non-derivative stock sales executed in the market at prevailing prices on the trade date.

Were the ATI insider sales executed in single trades or multiple trades?

Each reported ATI stock sale was executed through multiple trades. The Form 4 footnotes state that the prices are weighted averages, with individual trades occurring within specified price ranges for each transaction block.