Insider Transactions Reported by 18 Insiders of GERDAU S.A.

Symbol: GGB on NYSE
Location: Sao Paulo, Sp

Quick Takeaways

GGB - GERDAU S.A. has 18 insiders with reported activity on this page.
Net insider value flow over the last year: -$986,058.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: ; sell value: $986,058.
Net share flow: -258,026.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$986,058.

Buys

Shares: 0

Insiders: 0

Sells

$986,058

Shares: 258,026

Insiders: 5

Net

-$986,058

Shares: -258,026

Insiders: -5

Window (months)	Sell shares	Buy $	Sell $	Net $
0-3	258,026	$0	$986,058	-$986,058
3-6	0	$0	$0	$0
6-9	0	$0	$0	$0
9-12	0	$0	$0	$0

GERDAU S.A. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Chia Yuan Wang	Senior Management	$711,047	-$241,250	-25%	Filing P/S	10 Apr 2026
Gustavo Werneck da Cunha	CEO and Board Member	$366,412	-$408,500	-53%	Filing P/S	08 Apr 2026
Mauricio Metz	Executive Vice President	$180,352	-$4,240	-2.3%	Filing P/S	10 Apr 2026
Guilherme Chagas Gerdau Johannpeter	Vice-Chairman of Board	$0	-$281,647	-100%	Mixed	20 Mar 2026
Marcos Eduardo Faraco Wahrhaftig	Executive Vice President	$0	-$50,421	-100%	Mixed	09 Apr 2026
Wendel Gomes da Silva	Officer				Mixed	17 Mar 2026
Alberto Fernandes	Independent Board Member				Mixed	17 Mar 2026
Cesar Obino da Rosa Peres	Officer				Mixed	17 Mar 2026
Claudia Sender Ramirez	Independent Board Member				Mixed	17 Mar 2026
Clemir Uhlein	Senior Management				Mixed	17 Mar 2026
Rafael Gamboa Lopes	Executive Vice President				Mixed	17 Mar 2026
Marcos Zilles Mattiello	Senior Management				Mixed	17 Mar 2026
Leandro Miana Telles	Senior Management				Mixed	17 Mar 2026
Andre Bier Gerdau Johannpeter	Chairman of Board of Directors				Mixed	17 Mar 2026
Claudio Johannpeter	Vice-Chairman of Board				Mixed	17 Mar 2026
Belloc Rodrigo Soares	Senior management				Mixed	17 Mar 2026
Flavia Dias da Silva de Souza	Officer				Mixed	17 Mar 2026
Rafael Dorneles Japur	VP, CFO and IR Officer				Mixed	17 Mar 2026

Top shareholders of GERDAU S.A. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
FMR LLC	13F 13D/G	Company	0.2% from 13D/G	98,651,805	$364,025,161	—	31 Dec 2025	13F 13D/G
Capital International Investors	13F	Company	— class O/S missing	27,415,434	$101,162,951	—	31 Dec 2025	13F
DONALD SMITH & CO., INC.	13F	Company	— class O/S missing	24,211,588	$89,340,760	—	31 Dec 2025	13F
Aquamarine Financial (Cayman) Ltd	13F	Company	— class O/S missing	19,526,171	$72,051,571	—	31 Dec 2025	13F
CONTRARIAN CAPITAL MANAGEMENT, L.L.C.	13F	Company	— class O/S missing	19,069,112	$70,365,023	—	31 Dec 2025	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	— class O/S missing	12,059,942	$44,510,149	—	31 Dec 2025	13F
Itau Unibanco Holding S.A.	13F	Company	— class O/S missing	8,744,732	$32,294,810	—	31 Dec 2025	13F
CAUSEWAY CAPITAL MANAGEMENT LLC	13F	Company	— class O/S missing	7,259,433	$26,787,308	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	— class O/S missing	7,067,528	$26,079,180	—	31 Dec 2025	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	— class O/S missing	6,211,324	$22,919,786	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	— class O/S missing	6,067,900	$22,390,551	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	— class O/S missing	5,802,585	$21,411,542	—	31 Dec 2025	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	— class O/S missing	5,424,093	$20,014,903	—	31 Dec 2025	13F
SPX Gestao de Recursos Ltda	13F	Company	— class O/S missing	4,894,496	$18,060,690	—	31 Dec 2025	13F
MACKENZIE FINANCIAL CORP	13F	Company	— class O/S missing	4,117,253	$15,286,049	—	31 Dec 2025	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	— class O/S missing	3,751,067	$13,841,437	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	— class O/S missing	3,531,028	$13,029,493	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	— class O/S missing	3,505,150	$12,934,004	—	31 Dec 2025	13F
UBS Group AG	13F	Company	— class O/S missing	3,034,398	$11,196,928	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	— class O/S missing	2,626,041	$9,690,091	—	31 Dec 2025	13F
FIL Ltd	13F	Company	— class O/S missing	2,544,394	$9,388,814	—	31 Dec 2025	13F
Optiver Holding B.V.	13F	Company	— class O/S missing	2,530,923	$9,339,106	—	31 Dec 2025	13F
VANGUARD GROUP INC	13F	Company	— class O/S missing	2,199,360	$8,115,638	—	31 Dec 2025	13F
Point72 Asset Management, L.P.	13F	Company	— class O/S missing	2,072,395	$7,647,138	—	31 Dec 2025	13F
Jump Financial, LLC	13F	Company	— class O/S missing	2,005,343	$7,399,716	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	— class O/S missing	1,882,450	$6,946,241	—	31 Dec 2025	13F
D. E. Shaw & Co., Inc.	13F	Company	— class O/S missing	1,615,446	$5,960,996	—	31 Dec 2025	13F
Sagil Capital LLP	13F	Company	— class O/S missing	1,567,825	$5,785,274	—	31 Dec 2025	13F
Amundi	13F	Individual	— class O/S missing	1,359,223	$5,015,533	—	31 Dec 2025	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	— class O/S missing	1,327,066	$4,896,874	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	— class O/S missing	1,251,423	$4,617,752	—	31 Dec 2025	13F
Aquatic Capital Management LLC	13F	Company	— class O/S missing	1,028,902	$3,796,648	—	31 Dec 2025	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	— class O/S missing	1,024,392	$3,780,000	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	— class O/S missing	1,017,007	$3,752,756	—	31 Dec 2025	13F
Capital International Sarl	13F	Company	— class O/S missing	934,528	$3,448,408	—	31 Dec 2025	13F
Russell Investments Group, Ltd.	13F	Company	— class O/S missing	869,699	$3,235,280	—	31 Dec 2025	13F
Legal & General Group Plc	13F	Company	— class O/S missing	840,628	$3,097,714	—	31 Dec 2025	13F
VAN ECK ASSOCIATES CORP	13F	Company	— class O/S missing	833,545	$3,076,000	—	31 Dec 2025	13F
HSBC HOLDINGS PLC	13F	Company	— class O/S missing	822,772	$3,036,032	—	31 Dec 2025	13F
Cantonale Vaudoise Banque	13F	Individual	— class O/S missing	800,000	$2,952,000	—	31 Dec 2025	13F
Quadrature Capital Ltd	13F	Company	— class O/S missing	784,361	$2,894,292	—	31 Dec 2025	13F
Connor, Clark & Lunn Investment Management Ltd.	13F	Company	— class O/S missing	719,207	$2,653,874	—	31 Dec 2025	13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	— class O/S missing	598,087	$2,205,000	—	31 Dec 2025	13F
XTX Topco Ltd	13F	Company	— class O/S missing	588,619	$2,172,004	—	31 Dec 2025	13F
Grantham, Mayo, Van Otterloo & Co. LLC	13F	Company	— class O/S missing	586,191	$2,163,046	—	31 Dec 2025	13F
Virtus Family Office LLC	13F	Company	— class O/S missing	574,870	$2,121,270	—	31 Dec 2025	13F
Schonfeld Strategic Advisors LLC	13F	Company	— class O/S missing	545,963	$2,014,602	—	31 Dec 2025	13F
CAPITAL INTERNATIONAL LTD /CA/	13F	Company	— class O/S missing	527,933	$1,948,073	—	31 Dec 2025	13F
TWO SIGMA ADVISERS, LP	13F	Company	— class O/S missing	525,580	$1,939,390	—	31 Dec 2025	13F
GUGGENHEIM CAPITAL LLC	13F	Company	— class O/S missing	406,644	$1,500,516	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for GERDAU S.A.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Mauricio Metz	GGB	Preferred shares	Sale	-2.3%	$4,240	$4.24	-1,000	42,536	10 Apr 2026	Direct
Chia Yuan Wang	GGB	Preferred shares	Sale	-12.9%	$105,250	$4.21	-25,000	168,895	10 Apr 2026	Direct
Marcos Eduardo Faraco Wahrhaftig	GGB	Preferred shares	Sale	-100%	$50,421	$4.06	-12,419	0	09 Apr 2026	Direct
Gustavo Werneck da Cunha	GGB	Preferred shares	Sale	-36.2%	$208,000	$4.16	-50,000	88,080	09 Apr 2026	Direct
Gustavo Werneck da Cunha	GGB	Preferred shares	Sale	-26.6%	$200,500	$4.01	-50,000	138,080	08 Apr 2026	Direct
Chia Yuan Wang	GGB	Preferred shares	Sale	-14.9%	$136,000	$4.00	-34,000	193,895	08 Apr 2026	Direct
Guilherme Chagas Gerdau Johannpeter	GGB	Preferred shares	Sale	-100%	$281,647	$3.29	-85,607	0	20 Mar 2026	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.