ATI INC — Capital/Financing Update 2026

Jun 3, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) June 3, 2026

ATI Inc.

(Exact name of registrant as specified in its charter)

Delaware	1-12001	25-1792394
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

2021 McKinney Avenue , Dallas , Texas	75201
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (800) 289-7454

N/A

(Former name or former address, if changed since last report).

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.10 per share	ATI	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events

On June 3, 2026, ATI Inc. (the “Company”) issued a press release announcing its intention to offer a series of seven-year senior notes in an underwritten public offering. The Company’s press release announcing this intention is filed herewith as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

Exhibit 99.1	Press Release dated June 3, 2026.
Exhibit 104	Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

ATI Inc.
By:	/s/ Vaishali S. Bhatia
	Vaishali S. Bhatia
	Senior Vice President, General Counsel and
	Chief Compliance Officer

Dated: June 3, 2026