STEEL DYNAMICS INC (STLD) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-13 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: STEEL DYNAMICS INC (STLD) CIK: 0001022671 --- Reporting Owner --- Name: Graham Christopher A CIK: 0001607477 Role: Officer (Senior Vice President) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-13 | Code: S (Open market sale) Shares: -2,999 | Price: $236.52 Total Value: $709,323.48 Shares Owned After: 74,748 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-05-13 | Code: S (Open market sale) Shares: -3,000 | Price: $237.01 Total Value: $711,030.00 Shares Owned After: 71,748 | Ownership: D (Direct) [Transaction #3] Security: Common Stock Date: 2026-05-13 | Code: S (Open market sale) Shares: -3,001 | Price: $236.90 Total Value: $710,936.90 Shares Owned After: 68,747 | Ownership: D (Direct) --- Signature --- /s/ /s/ Christopher A. Graham (2026-05-15)