Gerdau S.A. Sponsored ADR (GGB) Insider Trading

Last 12 months

Insiders bought $782k and sold $2.95M on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. CEO and Board Member Gustavo Werneck Da Cunha sold $2.11M on May 8, 100% of their stake, outside a plan.

Net open-market

−$2.17M

1 buy · 4 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

1 / 2

executives and directors

Last open-market buy

Jun 2026

Jun 12, 2026

Get an email when GGB's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 23	Claudio Johannpeter Other	SoldNo plan	85,607	$4.94	$423k	<0.1%	Form 4
Sep 17	Rafael Gamboa Lopes Other	SoldNo plan	51,800	$5.09	$264k	38%	Form 4
Aug 10	Andre Bier Gerdau Johannpeter Other	SoldNo plan	99,200	$4.94	$490k	<0.1%	Form 4
Aug 6	Rafael Dorneles Japur Other	SoldNo plan	10,000	$5.10	$51k	10%	Form 4
Jun 12	Gustavo Werneck Da Cunha CEO and Board Member	Bought	165,224	$4.73	$782k	New	Form 4
Jun 8	Marcos Zilles Mattiello Other	SoldNo plan	10,387	$5.11	$53k	100%	Form 4
Jun 2	Mauricio Metz Other	SoldNo plan	7,000	$4.85	$34k	24%	Form 4
Jun 2	Chia Yuan Wang Other	SoldNo plan	30,935	$4.49	$139k	100%	Form 4
May 26	Mauricio Metz Other	SoldNo plan	5,000	$4.70	$24k	14%	Form 4
May 22	Rafael Dorneles Japur Other	SoldNo plan	5,000	$4.75	$24k	4.9%	Form 4
May 19	Cesar Obino Da Rosa Peres Officer	SoldNo plan	8,000	$4.60	$37k	100%	Form 4
May 13	Mauricio Metz Other	SoldNo plan	5,000	$4.85	$24k	13%	Form 4
May 8	Gustavo Werneck Da Cunha CEO and Board Member	SoldNo plan	432,854	$4.87	$2.11M	100%	Form 4
May 5	Mauricio Metz Other	SoldNo plan	2,000	$4.69	$9k	4.8%	Form 4
May 5	Chia Yuan Wang Other	SoldNo plan	40,000	$4.75	$190k	55%	Form 4
Apr 30	Chia Yuan Wang Other	SoldNo plan	20,000	$4.54	$91k	22%	Form 4
Apr 28	Gustavo Werneck Da Cunha CEO and Board Member	SoldNo plan	88,000	$4.50	$396k	100%	Form 4
Apr 28	Mauricio Metz Other	SoldNo plan	1,000	$4.53	$5k	2.4%	Form 4
Apr 28	Chia Yuan Wang Other	SoldNo plan	76,700	$4.49	$344k	45%	Form 4
Apr 28	Clemir Uhlein Other	SoldNo plan	38,276	$4.51	$173k	100%	Form 4
Apr 10	Mauricio Metz Other	SoldNo plan	1,000	$4.24	$4k	2.3%	Form 4
Apr 10	Chia Yuan Wang Other	SoldNo plan	25,000	$4.21	$105k	13%	Form 4
Apr 9	Marcos Eduardo Faraco Wahrhaftig Other	SoldNo plan	12,419	$4.06	$50k	100%	Form 4
Apr 8 – 9	Gustavo Werneck Da Cunha CEO and Board Member	SoldNo plan 2 parts	100,000	$4.09 average	$409k	53%	Form 4
Apr 8	Chia Yuan Wang Other	SoldNo plan	34,000	$4.00	$136k	15%	Form 4
Mar 20	Guilherme Chagas Gerdau Johannpeter Other	SoldNo plan	85,607	$3.29	$282k	<0.1%	Form 4

Sep 23No plan
Claudio Johannpeter
Other · sold 85,607 at $4.94
$423k
<0.1% of stake
Sep 17No plan
Rafael Gamboa Lopes
Other · sold 51,800 at $5.09
$264k
38% of stake
Aug 10No plan
Andre Bier Gerdau Johannpeter
Other · sold 99,200 at $4.94
$490k
<0.1% of stake
Aug 6No plan
Rafael Dorneles Japur
Other · sold 10,000 at $5.10
$51k
10% of stake
Jun 12
Gustavo Werneck Da Cunha
CEO and Board Member · bought 165,224 at $4.73
$782k
New position
Jun 8No plan
Marcos Zilles Mattiello
Other · sold 10,387 at $5.11
$53k
100% of stake
Jun 2No plan
Mauricio Metz
Other · sold 7,000 at $4.85
$34k
24% of stake
Jun 2No plan
Chia Yuan Wang
Other · sold 30,935 at $4.49
$139k
100% of stake
May 26No plan
Mauricio Metz
Other · sold 5,000 at $4.70
$24k
14% of stake
May 22No plan
Rafael Dorneles Japur
Other · sold 5,000 at $4.75
$24k
4.9% of stake
May 19No plan
Cesar Obino Da Rosa Peres
Officer · sold 8,000 at $4.60
$37k
100% of stake
May 13No plan
Mauricio Metz
Other · sold 5,000 at $4.85
$24k
13% of stake
May 8No plan
Gustavo Werneck Da Cunha
CEO and Board Member · sold 432,854 at $4.87
$2.11M
100% of stake
May 5No plan
Mauricio Metz
Other · sold 2,000 at $4.69
$9k
4.8% of stake
May 5No plan
Chia Yuan Wang
Other · sold 40,000 at $4.75
$190k
55% of stake
Apr 30No plan
Chia Yuan Wang
Other · sold 20,000 at $4.54
$91k
22% of stake
Apr 28No plan
Gustavo Werneck Da Cunha
CEO and Board Member · sold 88,000 at $4.50
$396k
100% of stake
Apr 28No plan
Mauricio Metz
Other · sold 1,000 at $4.53
$5k
2.4% of stake
Apr 28No plan
Chia Yuan Wang
Other · sold 76,700 at $4.49
$344k
45% of stake
Apr 28No plan
Clemir Uhlein
Other · sold 38,276 at $4.51
$173k
100% of stake
Apr 10No plan
Mauricio Metz
Other · sold 1,000 at $4.24
$4k
2.3% of stake
Apr 10No plan
Chia Yuan Wang
Other · sold 25,000 at $4.21
$105k
13% of stake
Apr 9No plan
Marcos Eduardo Faraco Wahrhaftig
Other · sold 12,419 at $4.06
$50k
100% of stake
Apr 8 – 9No plan
Gustavo Werneck Da Cunha
CEO and Board Member · sold 100,000 at avg $4.09
$409k
53% of stake
Apr 8No plan
Chia Yuan Wang
Other · sold 34,000 at $4.00
$136k
15% of stake
Mar 20No plan
Guilherme Chagas Gerdau Johannpeter
Other · sold 85,607 at $3.29
$282k
<0.1% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch GGB, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Related stocks: Steel

BAKBraskem S.A. Sponsored ADR

MTArcelorMittal NY Registry Shares

HMYHarmony Gold Mining Company Limited - Depositary Receipt (Common Stock)

BAS.XETRBasf SE

RIO.XLONRio Tinto PLC

0010F0.XKRXBowon Chemical Co., Ltd.

BHP.XLONBHP Group PLC

SUZSuzano S.A. - Sponsored ADR

Spot a number that looks wrong?

Download this analysis as a PDF (Pro)

Data sourced from company filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

2 of 2 free stocks used today

Keep analysing GGB

Create a free account and get 14 days of Premium: every stock and every tool.

Unlimited stocksQuality, fair value and dividends for 10,000+ stocks
Stock screenerFilter on quality, valuation and dividend safety
Portfolio trackerReal return, dividend calendar and portfolio quality
Editable DCFChange the assumptions and watch fair value move
Compare side by sideUp to 10 stocks in one table
Unlimited alertsPrice, P/E, Quality Score and yield

No card. Moves to Free after, unless you upgrade.

Already have an account?

Or come back tomorrow. Stocks on your watchlist are always free to view.