Mark D. Millett - 20 Feb 2026 Form 4 Insider Report for STEEL DYNAMICS INC (STLD)

Role: Chairman & CEO, Director
Signature: /s/ Mark D. Millett
Issuer symbol: STLD
Transactions as of: 20 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 24 Feb 2026, 13:52:39 UTC
Previous filing: 25 Nov 2025
Next filing: 25 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MILLETT MARK D	Chairman & CEO, Director	7575 W. JEFFERSON BLVD., FORT WAYNE	/s/ Mark D. Millett	24 Feb 2026	0001195949

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	STLD	Common Stock	Award	$0	+12,662	+0.42%	$0.000000	3,001,919	20 Feb 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.

Content

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.