MILLETT MARK D 4

4 · STEEL DYNAMICS INC · Filed Mar 13, 2026

AI-generated summary of this filing

Updated Mar 13, 2026

Steel Dynamics CEO Mark Millett Receives Award; 20,625 Shares Withheld

What Happened

Mark D. Millett, Chairman and CEO of Steel Dynamics (STLD), was awarded 46,422 shares under the company's Long-Term Incentive Program on March 13, 2026. To cover withholding taxes on the award, 20,625 of those shares were surrendered to the company at an indicated per-share value of $182.19, generating $3,757,669 in tax withholding. Net shares retained from this grant = 25,797.

Key Details

Transaction date: 2026-03-13.
Award (code A): 46,422 shares granted at $0.00 (issuer award under LTIP).
Tax withholding (code F): 20,625 shares withheld at $182.19/share for $3,757,669.
Net new shares retained: 25,797 (46,422 granted − 20,625 withheld), worth roughly $4.70M at $182.19/share.
Footnotes: F1 — award issued under the Company’s 2023 Equity Incentive Plan and LTIP, exempt from Section 16(b) per Rule 16b-3(d). F2 — shares were withheld by the issuer to satisfy the reporting person’s tax withholding obligation, exempt under Rule 16b-3(e).
Shares owned after the transaction: not disclosed in the provided filing details.
Filing timeliness: report covers transactions on 2026-03-13 and was filed with period of report 2026-03-13 (no late filing indicated).

Context

This is a compensation-related award and routine tax-withholding event, not an open-market sale. The F-code disposition reflects shares withheld to satisfy taxes rather than a market sale; such transactions are common following equity vesting.

Form 4

Period: 2026-03-13

DirectorChairman and CEO

Transactions

Award
Common Stock
[F1]
2026-03-13+46,422→ 3,037,326 total
Tax Payment
Common Stock
[F2]
2026-03-13$182.19/sh−20,625$3,757,669→ 3,016,701 total

Footnotes (2)

[F1]Acquisition from Issuer: Shares awarded under Long-Term Incentive Program adopted by Compensation Committee composed of three or more independent non-employee directors pursuant to the Company's 2023 Equity Incentive Plan approved by Compensation Committee and Stockholders and exempt from Section 16(b) of Exchange Act pursuant to Rule 16b-3(d).
[F2]Disposition to Issuer: Shares withheld by Issuer in payment of reporting person's withholding tax liability in connection with such person's receipt or vesting of an equity security, and either approved in advance by Compensation Committee or mandated by the express terms of the Plan and exempt from Section 16(b) of Exchange Act in accordance with Exchange Act Rule 16b-3(e).

Signature

/s/ Mark D. Millett|2026-03-13

1 file