X0508 4 2026-02-02 0001022671 STEEL DYNAMICS INC STLD 0002098057 Bell Matthew Lane 7575 W. JEFFERSON BLVD. FORT WAYNE IN 46804 0 1 0 0 Vice President 0 Common Stock 2026-02-02 4 A 0 609 0 A 1299 D Common Stock 2026-02-02 4 F 0 58 179.57 D 1241 D Common Stock 17 I By Roth IRA Shares awarded pursuant to 2018 Executive Incentive Plan approved by Board of Directors and Stockholders and exempt from Section 16(b) of Exchange Act pursuant to Rule 16b-3 thereunder. One-third of shares granted vest on date of grant, one-third vest one year from grant, and final one-third vest two years from grant. Payment of withholding tax liability by issuer's withholding of securities incident to the reporting person's vesting of a security in accordance with Rule 16b-3. /s/ Matthew Lane Bell 2026-02-03