National Steel officer Campos Rabello files Form 3

National Steel Co submitted a Form 3 identifying Campos Rabello Antonio Marco as an officer of the company, serving as CFO and Investor Relations Officer (IRO).

Accepted by SEC EDGAR 03/23/2026 - 04:00 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

National Steel Co submitted a Form 3 identifying Campos Rabello Antonio Marco as an officer of the company, serving as CFO and Investor Relations Officer (IRO). The filing reports no stock transactions or derivative positions for him, and shows no current holdings in the summarized data.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 3 filing for SID disclose about Campos Rabello Antonio Marco?

The filing identifies Campos Rabello Antonio Marco as an officer of National Steel Co, serving as CFO and Investor Relations Officer. It also shows no reported stock transactions or derivative positions for him in the summarized data from this Form 3.

Are there any share purchases or sales reported for SID’s Campos Rabello in this Form 3?

No share purchases or sales are reported for Campos Rabello Antonio Marco. The transaction summary shows zero buy, sell, acquire, dispose, or other transactions, and lists no derivative transactions or holdings associated with him in this Form 3.

Does the SID Form 3 show any derivative securities held by Campos Rabello?

The Form 3 does not show any derivative securities held by Campos Rabello Antonio Marco. The derivativeSummary is empty, and the transactionSummary indicates zero derivative transactions and zero exercise shares in the data provided for this filing.

What role does Campos Rabello hold at NATIONAL STEEL CO in this Form 3?

Campos Rabello Antonio Marco is listed as an officer of NATIONAL STEEL CO in this Form 3. His stated officer title is “CFO and IRO,” indicating he serves as Chief Financial Officer and Investor Relations Officer for the company.

Does the SID Form 3 indicate Campos Rabello as a 10% owner or director?

The Form 3 data indicates that Campos Rabello Antonio Marco is not a director and not a ten percent owner of NATIONAL STEEL CO. He is reported solely in his capacity as an officer, specifically as CFO and Investor Relations Officer.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Campos Rabello Antonio Marco

(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)
04/30/2025

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)
	CFO and IRO

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 Antonio Marco Campos Rabello	03/23/2026
	** 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)