ATI director sells 2,485 shares at $201.61

ATI director David J. Morehouse sold 2,485 ATI shares and now directly holds 35,826 shares.

Rhea-AI Filing Summary

ATI INC (ATI) director David J. Morehouse reported selling 2,485 shares of common stock on September 2, 2026 in an open market or private transaction at a weighted average price of $201.61 per share, with individual prices ranging from $201.56 to $201.82. After this sale, he directly holds 35,826 shares of ATI common stock, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 2,485 shares

Net Sell 1 txn

Insider Morehouse David J

Role Director

Sold 2,485 shs ($501K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.10 per share F1	2,485	$201.61	$501K

Holdings After Transaction: Common Stock, par value $0.10 per share — 35,826 shares (Direct)

Footnotes (1)

1. F1. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $201.56 to to $201.82. 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.

Key Figures

Shares sold: 2,485 shares Weighted average sale price: $201.61 per share Sale price range: $201.56–$201.82 per share +1 more

4 metrics

Shares sold 2,485 shares Common stock sale reported for September 2, 2026

Weighted average sale price $201.61 per share Open market or private transactions on September 2, 2026

Sale price range $201.56–$201.82 per share Multiple transactions comprising the reported sale

Shares owned after transaction 35,826 shares Direct holdings of David J. Morehouse after the sale

Key Terms

weighted average price, open market or private transaction, common stock, par value $0.10 per share, U.S. Securities and Exchange Commission

4 terms

weighted average price financial

"The price reported is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open market or private transaction financial

"Sale in open market or private transaction"

common stock, par value $0.10 per share financial

"security title Common Stock, par value $0.10 per share"

U.S. Securities and Exchange Commission regulatory

"Staff of the U.S. Securities and Exchange Commission (the "SEC")"

The U.S. Securities and Exchange Commission is a government agency responsible for overseeing the stock market and protecting investors. It sets rules to ensure that companies share truthful information and that trading is fair, helping to maintain trust in the financial system. This oversight is important because it helps prevent fraud and ensures that investors can make informed decisions.

FAQ

What insider transaction did ATI (ATI) disclose for David J. Morehouse?

ATI disclosed that director David J. Morehouse sold 2,485 shares of ATI common stock on September 2, 2026 in a sale described as an open market or private transaction.

At what price did the ATI (ATI) shares sell in David J. Morehouse’s transaction?

The sale by David J. Morehouse was reported at a weighted average price of $201.61 per share, with the shares sold in multiple transactions at prices ranging from $201.56 to $201.82.

How many ATI (ATI) shares does David J. Morehouse own after the reported sale?

After the reported sale, David J. Morehouse directly owns 35,826 shares of ATI common stock, as stated in the filing’s post-transaction holdings figure.

Was David J. Morehouse’s ATI (ATI) stock sale made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as affirmed, and there is no footnote stating that the September 2, 2026 sale was made under a Rule 10b5-1 trading plan.

What type of security did David J. Morehouse sell in ATI (ATI)?

David J. Morehouse sold common stock, par value $0.10 per share, of ATI INC, according to the non-derivative transaction details reported.

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Available on EDGAR 09/04/2026 - 04:24 PM Accepted by SEC EDGAR 09/04/2026 - 04:24 PM Learn about SEC filing dates

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 TEXAS 75201

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/02/2026

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

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

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

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	09/02/2026		S		2,485	D	$201.61(1)	35,826	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 $201.56 to to $201.82. 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.

	/s/ Amanda J. Skov, Attorney-in-Fact for David J. Morehouse	09/04/2026
	** 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.
* Form 4: SEC 1474 (03-26)