X0508 4 2026-02-20 0001022671 STEEL DYNAMICS INC STLD 0001607477 Graham Christopher A 7575 W. JEFFERSON BLVD. FORT WAYNE IN 46804 0 1 0 0 Senior Vice President 0 Common Stock 2026-02-20 4 A 0 4187 0 A 72056 D Represents grant of restricted stock units equal to the same number of underlying shares, received as an award under the Issuer's equity incentive plan, for no consideration, and exempt from Section 16(b) by virtue of Rule 16b-3(d)(1) and (3). The restricted units vest over a four year period as follows: 1/3 on 02/20/2028, 1/3 on 02/20/2029 and the final 1/3 on 02/20/2030, following which settlement is to be made solely in the same number of shares of the Issuer's common stock shown in Column 4. /s/ Christopher A. Graham 2026-02-24