National Steel (SID) executive officer files initial Form 3 insider report

Rhea-AI Filing Summary

NATIONAL STEEL CO executive officer Daher Filho Tufi has filed an initial ownership report on Form 3. This filing identifies him as an executive officer of the company but, in the excerpt provided, shows no reported transactions or derivative positions and no buy or sell activity.

Understanding Insider Trading Forms →

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^*

Daher Filho Tufi

(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 Tufi Daher Filho	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 for Daher Filho Tufi show?

The Form 3 lists Daher Filho Tufi as an executive officer of NATIONAL STEEL CO. In the data provided, it reports no transactions, no derivative positions, and a neutral net buy/sell direction, indicating only an initial ownership status disclosure.

Did Daher Filho Tufi buy or sell SID shares in this Form 3 filing?

No buy or sell activity is reported for Daher Filho Tufi in this Form 3 data. The transaction summary shows zero buy and zero sell counts, with net buy/sell shares at zero and a neutral net buy/sell direction for this filing.

What insider role is disclosed for Daher Filho Tufi at NATIONAL STEEL CO (SID)?

The Form 3 identifies Daher Filho Tufi as an Executive Officer of NATIONAL STEEL CO. He is not listed as a director or ten percent owner in the provided data, which focuses on his officer status and related initial ownership reporting obligations.

Does the SID Form 3 for Daher Filho Tufi include derivative securities information?

The derivative section in this Form 3 excerpt is empty, and the derivativeTransactionCount is zero. This indicates no reported options, warrants, or other derivative positions for Daher Filho Tufi in the data shown for this initial ownership statement.

Are there any gifts or tax-withholding transactions reported for SID insider Daher Filho Tufi?

No. The transaction summary shows giftCount and taxWithholdingCount as zero, with corresponding share amounts at zero. This means the excerpted Form 3 does not report any gifts, tax-withholding dispositions, or similar non-market transactions for this insider.