Comparable stake leader
FMR LLC
SEC ownership of GERDAU S.A.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001073404.
Disclosed value leader
Capital World Investors
Comparable rows
1/50
Latest evidence
31 Mar 2026
- Public ticker
- GGB on NYSE
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
FMR LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
1 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
FMR LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001073404
- Issuer location
- Sao Paulo, Sp
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GERDAU S.A. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
Capital World Investors
Comparable rows
1/50
Latest evidence
31 Mar 2026
13F
13D/G
Lead comparable stake: 0.2%
49 rows are not safely comparable across share classes.
13D/G row: FMR LLC
Showing 1-8 of 50 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 0.2%.
1 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 1
FMR LLC
0.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13F
13D/G
Company
|
0.2%
from 13D/G
|
$39,552
10,956 shares
|
— | 31 Mar 2026 |
| Capital World Investors |
13F
Company
|
—
class O/S missing
|
$99,384,405
27,530,306 shares
|
— | 31 Mar 2026 |
| TWO SIGMA INVESTMENTS, LP |
13F
Company
|
—
class O/S missing
|
$93,281,389
25,839,720 shares
|
— | 31 Mar 2026 |
| DONALD SMITH & CO., INC. |
13F
Company
|
—
class O/S missing
|
$87,147,505
24,140,583 shares
|
— | 31 Mar 2026 |
| CONTRARIAN CAPITAL MANAGEMENT, L.L.C. |
13F
Company
|
—
class O/S missing
|
$68,839,494
19,069,112 shares
|
— | 31 Mar 2026 |
| Aquamarine Financial (Cayman) Ltd |
13F
Company
|
—
class O/S missing
|
$60,381,477
16,726,171 shares
|
— | 31 Mar 2026 |
| BANK OF AMERICA CORP /DE/ |
13F
Company
|
—
class O/S missing
|
$47,733,669
13,222,623 shares
|
— | 31 Mar 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$47,054,000
13,040,903 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$3,801,414.
Buys
$781,510
Insiders: 1
Sells
$4,582,923
Insiders: 8
Net
-$3,801,414
Shares: -852,567
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 165,224
Shares: 1,017,791
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 165,224 | 932,184 | $781,510 | $4,301,276 | -$3,519,767 |
| 3-6 | 0 | 85,607 | $0 | $281,647 | -$281,647 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to GERDAU S.A.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Gustavo Werneck da Cunha
Net 12M change
-$3,801,413
Latest report
12 Jun 2026
Recent insider transactions for GERDAU S.A.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Gustavo Werneck da Cunha | GGB | Preferred shares | Purchase | $781,510 | $4.73 | 165,224 | 165,224 | 12 Jun 2026 | Direct | |
| Chia Yuan Wang | GGB | Preferred shares | Sale | -100% | $138,898 | $4.49 | -30,935 | 0 | 02 Jun 2026 | Direct |
| Mauricio Metz | GGB | Preferred shares | Sale | -23.7% | $33,950 | $4.85 | -7,000 | 22,536 | 02 Jun 2026 | Direct |
| Mauricio Metz | GGB | Preferred shares | Sale | -14.5% | $23,500 | $4.70 | -5,000 | 29,536 | 26 May 2026 | Direct |
| Rafael Dorneles Japur | GGB | Preferred shares | Sale | -4.9% | $23,750 | $4.75 | -5,000 | 96,967 | 22 May 2026 | Direct |
| Cesar Obino da Rosa Peres | GGB | Preferred shares | Sale | -99.9% | $36,800 | $4.60 | -8,000 | 8 | 19 May 2026 | Direct |
| Mauricio Metz | GGB | Preferred shares | Sale | -12.6% | $24,250 | $4.85 | -5,000 | 34,536 | 13 May 2026 | Direct |
| Gustavo Werneck da Cunha | GGB | Preferred shares | Sale | -100% | $2,107,999 | $4.87 | -432,854 | 0 | 08 May 2026 | Direct |
| Gustavo Werneck da Cunha | GGB | Preferred shares | Award | 540967.5% | 432,774 | 432,854 | 08 May 2026 | Direct | ||
| Mauricio Metz | GGB | Preferred shares | Sale | -4.82% | $9,380 | $4.69 | -2,000 | 39,536 | 05 May 2026 | Direct |
| Chia Yuan Wang | GGB | Preferred shares | Sale | -55.4% | $190,000 | $4.75 | -40,000 | 32,195 | 05 May 2026 | Direct |
| Chia Yuan Wang | GGB | Preferred shares | Sale | -21.7% | $90,800 | $4.54 | -20,000 | 72,195 | 30 Apr 2026 | Direct |
| Gustavo Werneck da Cunha | GGB | Preferred shares | Sale | -99.9% | $396,000 | $4.50 | -88,000 | 80 | 28 Apr 2026 | Direct |
| Chia Yuan Wang | GGB | Preferred shares | Sale | -45.4% | $344,383 | $4.49 | -76,700 | 92,195 | 28 Apr 2026 | Direct |
| Clemir Uhlein | GGB | Preferred shares | Sale | -100% | $172,625 | $4.51 | -38,276 | 0 | 28 Apr 2026 | Direct |
| Mauricio Metz | GGB | Preferred shares | Sale | -2.35% | $4,530 | $4.53 | -1,000 | 41,536 | 28 Apr 2026 | Direct |
| 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 |
* marks a reported price that did not pass the local price check.