STEEL DYNAMICS INC

Regulatory Filings • Nov 12, 2025

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

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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) November 11, 2025

STEEL DYNAMICS, INC.

(Exact name of registrant as specified in its charter)

Indiana	0-21719	35-1929476
(State
or other jurisdiction of incorporation)	(Commission
File Number)	(IRS
Employer Identification No.)

7575 West Jefferson Blvd , Fort Wayne , Indiana 46804

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: 260 - 969-3500

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:

¨ 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	Name of each exchange on which registered
Common
Stock voting, $0.0025 par value	STLD	NASDAQ
Global Select Market

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. ¨

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Item 8.01. Other Events.

On November 11, 2025, Steel Dynamics, Inc. issued a press release titled “Steel Dynamics Announces Leadership Appointment.” A copy of that press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

The following exhibit is filed with this report:

Exhibit Number Description

99.1 A press release dated November 11, 2025, titled “Steel Dynamics Announces Leadership Appointment.”

104 Cover Page Interactive Data File – the cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.

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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 hereto duly authorized.

		STEEL DYNAMICS, INC.
		/s/ Theresa E. Wagler
Date: November 12, 2025	By:	Theresa E. Wagler
	Title:	Executive
Vice President and Chief Financial Officer

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