National Steel (NYSE: SID) executive submits initial Form 3 filing

Rhea-AI Filing Summary

National Steel Co executive officer Garcia Diniz Eneas has filed an initial insider ownership report on Form 3. This filing establishes him as a reporting person for the company’s securities but does not list any buy, sell, or other transactions, and shows no derivative positions in the excerpt provided.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Garcia Diniz Eneas

(Last) (First) (Middle)

AVENIDA BRIGADEIRO FARIA LIMA, 3400

20 ANDAR

(Street)

SAO PAULO SAO PAULO 04538-132

(City) (State) (Zip)

BRAZIL

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
12/09/2025

3. Issuer Name and Ticker or Trading Symbol
NATIONAL STEEL CO [ SID ]

3a. Foreign Trading Symbol

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive Officer

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Mayra Favero Celleguin, Attorney-in-Fact for Eneas Garcia Diniz	03/18/2026
	** 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 5 (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.
* Form 3: SEC 1473 (03-26)

FAQ

What does the National Steel Co (SID) Form 3 filing show?

The Form 3 filing identifies Garcia Diniz Eneas as an Executive Officer reporting person of National Steel Co. It is an initial ownership report and does not disclose any specific security transactions or derivative positions in the provided data.

Did Garcia Diniz Eneas buy or sell National Steel Co (SID) shares?

No transactions are reported for Garcia Diniz Eneas in this Form 3 data. The summary counts for buys, sells, gifts, exercises, and other dispositions are all zero, indicating only initial reporting status, not trading activity.

What is the role of the reporting person in this SID Form 3?

The reporting person, Garcia Diniz Eneas, is listed as an Executive Officer of National Steel Co. His designation triggers insider reporting obligations for the company’s securities under SEC rules, even though no specific trades are disclosed here.

Are there any derivative securities reported for SID in this Form 3?

No derivative securities are reported in the derivative summary for this Form 3. The derivative section is empty, and the exercise-related counts in the transaction summary are zero, indicating no reported options, warrants, or similar instruments.

Does this National Steel Co (SID) Form 3 indicate any insider trading activity?

The Form 3 excerpt does not indicate insider trading activity. All transaction-related counts, including buys, sells, gifts, tax withholdings, and restructurings, are zero, so it functions solely as an initial insider ownership registration.