Table of Contents st UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended March 31, 2024 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from _______ to _______ Commission File Number 0-21719 Steel Dynamics, Inc. (Exact name of registrant as specified in its charter) Indiana 35-1929476 (St ...