David J. Morehouse - 04 Aug 2025 Form 4 Insider Report for ATI INC (ATI)

Role: Director
Signature: /s/ Amanda J. Skov, Attorney-in-Fact for David J. Morehouse
Issuer symbol: ATI
Transactions as of: 04 Aug 2025
Net transactions value: -$598,920
Form type: 4
Filing time: 06 Aug 2025, 17:44:26 UTC
Previous filing: 22 May 2025
Next filing: 11 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Morehouse David J	Director	C/O ATI INC., 2021 MCKINNEY AVENUE, SUITE 1100, DALLAS	/s/ Amanda J. Skov, Attorney-in-Fact for David J. Morehouse	06 Aug 2025	0001635153

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATI	Common Stock, par value $0.10 per share	Sale	$583,660	-7,700	-15%	$75.80	44,977	04 Aug 2025	Direct	F1
transaction	ATI	Common Stock, par value $0.10 per share	Sale	$15,260	-200	-0.44%	$76.30	44,777	04 Aug 2025	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $75.29 to to $76.27. 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.
F2	The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $776.29 to to $76.31. 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.

Content

The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $75.29 to to $76.27. 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 $776.29 to to $76.31. 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.