Steel Dynamics CEO granted 569 STLD shares, sells 253 for tax

Steel Dynamics (STLD) reported insider equity activity by Chairman and CEO Mark D. Millett, who is also a director.

Rhea-AI Filing Summary

Steel Dynamics (STLD) reported insider equity activity by Chairman and CEO Mark D. Millett, who is also a director. On 11/21/2025, he received a grant of 569 shares of common stock for no cash consideration, structured as restricted stock because of his age and subject to a two-year holding period. The filing notes this grant is exempt from certain short-swing profit rules under Rule 16b-3.

On the same date, 253 shares of common stock were surrendered to the issuer at $153.11 per share to cover taxes due on the share issuance, which is also reported as exempt under Rule 16b-3. After these transactions, Millett directly beneficially owned 2,989,257 shares of Steel Dynamics common stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider MILLETT MARK D

Role Chairman and CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	569	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	253	$153.11	$39K

Holdings After Transaction: Common Stock — 2,989,257 shares (Direct)

Footnotes (2)

1. F1. Represents grant of restricted stock, in lieu of restricted stock units because of reporting person's age, for no consideration, and exempt from Section 16(b) by virtue of Rule 16b-3(d)(1) and (3), subject, however, to a two year holding period.
2. F2. Represents disposition to issuer to cover taxes payable upon issuance of shares reported in footnote (1), exempt pursuant to Rule 16b-3.

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Accepted by SEC EDGAR 11/25/2025 - 08:17 AM EST Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

MILLETT MARK D

(Last) (First) (Middle)

7575 W. JEFFERSON BLVD.

(Street)

FORT WAYNE IN 46804

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
STEEL DYNAMICS INC [ STLD ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman and CEO

3. Date of Earliest Transaction (Month/Day/Year)
11/21/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/21/2025		A		569(1)	A	$0	2,989,510	D
Common Stock	11/21/2025		F		253(2)	D	$153.11	2,989,257	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents grant of restricted stock, in lieu of restricted stock units because of reporting person's age, for no consideration, and exempt from Section 16(b) by virtue of Rule 16b-3(d)(1) and (3), subject, however, to a two year holding period.

2. Represents disposition to issuer to cover taxes payable upon issuance of shares reported in footnote (1), exempt pursuant to Rule 16b-3.

	/s/ Mark D. Millett	11/25/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.