Gerdau (NYSE: GGB) vice-chairman reports RSU awards and share holdings

Rhea-AI Filing Summary

GERDAU S.A. vice-chairman Johannpeter Guilherme Chagas Gerdau filed an initial ownership report showing existing equity interests, rather than new market transactions. The filing lists restricted stock units linked to preferred shares and both direct and indirect share holdings.

He holds restricted stock units tied to 106,519, 116,745 and 105,670 preferred shares, vesting on February 12 of 2027, 2028 and 2029, at exercise prices denominated in Brazilian reais. The report also shows 85,607 preferred shares held directly and 702,952,615 common shares held indirectly as referenced in the remarks.

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^*

Johannpeter Guilherme Chagas Gerdau

(Last) (First) (Middle)

AVENUE DOUTORA RUTH DE CARDOSO, 8501

8TH FLOOR, PINHEIROS

(Street)

SAO PAULO SAO PAULO 05425-070

(City) (State) (Zip)

BRAZIL

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/17/2026

3. Issuer Name and Ticker or Trading Symbol
GERDAU S.A. [ GGB ]

3a. Foreign Trading Symbol
[GGBR]

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

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

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Vice-Chairman of Board

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)
Preferred shares	85,607	D
Common shares	702,952,615	I	Remarks(4)

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
Restricted Stock Units	(1)	02/12/2027	Preferred shares	106,519	$19.5	D
Restricted Stock Units	(2)	02/12/2028	Preferred shares	116,745	$18.32	D
Restricted Stock Units	(3)	02/12/2029	Preferred shares	105,670	$20.83	D

Explanation of Responses:

1. Restricted stock units vest on February 12, 2027. Exercise price denominated in Brazilian reais (R$).

2. Restricted stock units vest on February 12, 2028. Exercise price denominated in Brazilian reais (R$).

3. Restricted stock units vest on February 12, 2029. Exercise price denominated in Brazilian reais (R$).

4. See remarks below

Remarks:

The Reporting Person has a 25% interest in Frepar Participacoes S.A.. Frepar Participacoes S.A. holds a 25% equity interest in INDAC - Investimentos e Participacoes S.A. INDAC owns 57% of Grupo Gerdau Empreendimentos Ltda. INDAC holds 100% of Acoter Participacoes Ltda. Acoter Participacoes Ltda. owns the remaining 43% of Grupo Gerdau Empreendimentos Ltda. Grupo Gerdau Empreendimentos Ltda., together with INDAC, jointly controls Gerdau Metalurgica S.A. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

	Guilherme Chagas Gerdau Johannpeter	03/17/2026
	** 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 Gerdau (GGB) Form 3 filing by Johannpeter Guilherme Chagas Gerdau show?

The Form 3 shows Johannpeter Guilherme Chagas Gerdau’s existing ownership in Gerdau, including restricted stock units and direct and indirect share holdings. It is an initial ownership report, not a record of new share purchases or sales.

How many preferred-share-linked restricted stock units does GGB’s vice-chairman report?

He reports restricted stock units linked to 106,519, 116,745 and 105,670 preferred shares. These awards represent future equity that may be received if vesting and other conditions are satisfied, rather than current freely tradable shares.

When do the reported restricted stock units for Gerdau (GGB) vest?

The restricted stock units vest on February 12, 2027, February 12, 2028 and February 12, 2029. Each vesting date applies to a different RSU grant, and the exercise prices are stated in Brazilian reais in the filing footnotes.

What direct share holdings does Johannpeter Guilherme Chagas Gerdau report in GGB?

He reports direct ownership of 85,607 preferred shares of Gerdau. In addition to these direct holdings, he also reports large indirect ownership of common shares, providing a fuller picture of his total reported economic exposure to the company.

How many Gerdau (GGB) common shares are reported as indirectly owned?

The filing lists 702,952,615 common shares as indirectly owned, with the nature of this indirect ownership referenced in the remarks. Indirect ownership commonly reflects holdings through entities or structures rather than personally registered shares.

Does this Gerdau (GGB) Form 3 indicate insider buying or selling?

No, the Form 3 records existing equity and derivative positions, not new market trades. Transaction codes and summaries indicate no buy or sell activity, only holdings and derivative awards already in place as of the reporting date.