STLD files 8-K on leadership appointment with Exhibit 99.1

Rhea-AI Filing Summary

Steel Dynamics, Inc. reported a leadership appointment, noting it issued a press release titled “Steel Dynamics Announces Leadership Appointment.” The press release is included as Exhibit 99.1 to the report.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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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) 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. ¨

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.

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

FAQ

What did STLD announce in this report?

Steel Dynamics, Inc. announced a leadership appointment via a press release titled “Steel Dynamics Announces Leadership Appointment.”

Where can I find details of the leadership appointment for STLD?

The press release containing details is attached as Exhibit 99.1 to the report.

What SEC form did STLD use for this disclosure?

Steel Dynamics used a Form 8-K for this disclosure.

What is Steel Dynamics’ trading symbol and exchange?

The common stock trades under STLD on the NASDAQ Global Select Market.

Who signed the report for STLD?

It was signed by Theresa E. Wagler, Executive Vice President and Chief Financial Officer.

What is the earliest event date referenced?

The earliest event date referenced is November 11, 2025.