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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

October 21, 2026

Date of Report (Date of earliest event reported)

WORTHINGTON STEEL, INC.

(Exact name of registrant as specified in its charter)

\n\n\n\n\n\n\n\n\n\n\n\n\n\n

Ohio

001-41830

92-2632000

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

\n\n\n\n\n\n\n\n\n\n

100 W. Old Wilson Bridge Road

Columbus, Ohio

43085

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (614) 840-3462

Not Applicable

(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 (see General Instruction A.2. below):

\n\n\n

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

\n\n\n

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

\n\n\n

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

\n\n\n

☐	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:

\n\n\n\n\n\n\n\n\n\n\n\n\n\n

\n	\n	\n	\n
Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Shares, without par value		WS		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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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. ☐

\n\n\n

Item 7.01

Regulation FD Disclosure.

On October 21, 2026, the Company issued a press release. A copy of the press release is furnished as Exhibit 99.1 hereto.

The information contained in this Item 7.01 and in Exhibit 99.1 attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

\n\n\n

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits.

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

\n\n	\n
Exhibit No.		Document Description
\n
99.1		Press Release dated October 21, 2026.*
\n
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

\n\n\n

*	Furnished herewith and not filed.

SIGNATURES

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.

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

\n\n	\n	\n\n	\n	\n\n	\n
\n		\n		WORTHINGTON STEEL, INC.
\n	\n	\n
Date: October 21, 2026		\n		By:		/s/ Joseph Y. Heuer
\n		\n		Name:		Joseph Y. Heuer
\n		\n		Title:		Vice President - General Counsel and Secretary

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