STLD: Leadership change

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. At a meeting held on August 12, 2026, the Compensation Committee of the Board of Directors of the Company approved one-time transition awards. Barry Schneider and Christopher Graham will each be granted restricted stock units on December 15, 2026 in the amount of $2,000,000, with half of such restricted stock units vesting on December 15, 2028 and the remaining half vesting on December 15, 2029, in each case subject to such person being currently employed by the Company. 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: August 18, 2026 By: Theresa E. Wagler Title: Executive Vice President and Chief Financial Officer