GGB 6-K

U.S.SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16 UNDER THE

SECURITIESEXCHANGE ACT OF 1934

Dated August 5, 2026

Commission File Number 1-14878

GERDAUS.A.

(Translation of Registrant’s Name into English)

Av. Dra. Ruth Cardoso, 8,501 – 8° andar

São Paulo, São Paulo - Brazil CEP 05425-070

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  x           Form 40-F  ¨

Exhibit Index

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 5, 2026

Exhibit 99.1		2Q26 Earnings<br>Release<br>August 5th, 2026
	DISCLAIMER<br>This document may contain forward-looking statements. These<br>statements are based on estimates, information or methods that may be<br>incorrect or inaccurate and that may not occur. These estimates are<br>also subject to risks, uncertainties, and assumptions that include,<br>among other factors, general economic, political, and commercial<br>conditions in Brazil and in the markets where we operate, as well as<br>existing and future government regulations. Potential investors are<br>cautioned that these forward-looking statements do not constitute<br>guarantees of future performance, given that they involve risks and<br>uncertainties. Gerdau does not undertake, and expressly waives, any<br>obligation to update any of these forward-looking statements, which<br>speak only as of the date they were made.
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	3<br>Highlights<br>STRONG RESULTS IN<br>NORTH AMERICA<br>EXPANSION OF<br>SELF-PRODUCTION OF ENERGY<br>Increase in the ownership stake in<br>Dona Francisca Energética, raising<br>energy self-generation to over 50%<br>of the Company’s total<br>consumption.<br>QoQ and YoY growth, highlighted<br>by a more than 7% increase in<br>North American volumes<br>compared to the prior year.<br>Slight recovery in results, with<br>a focus on higher profitability<br>and productivity despite<br>continued pressure from<br>imports.<br>SHIPMENTS<br>2.9 Mt OF STEEL<br>GRADUAL IMPROVEMENT<br>IN BRAZIL<br>The segment's EBITDA increased<br>15% vs. 1Q26, reinforcing resilient<br>demand in the main sectors in<br>which we operate.
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	4<br>Financial performance<br>6M26 CAPEX INVESTMENTS:<br>R$ 2.1 b<br>~45% of total Capex planned for the year invested<br>SHARE CANCELLATION<br>2Q26 ADJUSTED EBITDA:<br>R$ 3.4 b<br>+16% vs. 1Q26, with positive performance across all<br>reportable segments<br>LEVERAGE:<br>O.69x ND/EBITDA<br>Solid balance sheet with low leverage<br>SHARE BUYBACK2<br>:<br>1 Measurement calculated considering company’s corporate net income.	2 Considers buybacks made up to July 17, 2026<br>% executed	R$ invested:<br>% over outstanding shares:<br>31%	~R$ 334 million<br>0.9%<br>Gerdau S.A.<br>EARNINGS PER<br>SHARE1<br>:<br>R$ 0.74<br>2Q26 ADJUSTED<br>NET INCOME:<br>R$ 1.5 b<br>+45% vs. 1Q26 Vs. R$ 0.51 in 1Q26<br>2Q26 FREE CASH FLOW:<br>R$ 237 m<br>Positive Free Cash Flow driven by<br>Adjusted EBITDA growth<br>Total of the program 2026: ~56.4M shares<br>GERDAU S.A.:<br>2Q26 DIVIDENDS:<br>METALÚRGICA<br>GERDAU S.A.:<br>Payment as of September 11, 2026<br>R$ 0.23/share<br>~R$ 146 m R$ 0.11/share<br>~R$ 451 m<br>14.7 million GGBR shares (or 85% of the repurchased<br>shares)<br>2.2 million GOAU shares (or 100% of the repurchased<br>shares)<br>22%	~R$ 21 million<br>0.2%<br>Metalúrgica Gerdau S.A.<br>~10 M shares
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	5<br>Outlook*<br>NORTH AMERICA<br>3Q26: Stable margin<br>Continued discipline in capital allocation and operational efficiency<br> ▪ Backlog remains solid, supporting healthy shipment levels;<br> ▪ Stable metal spreads and moderate pressure on production<br>costs, driven by fuel costs and scheduled maintenance<br>shutdowns;<br> ▪ Start of the scheduled shutdown at the Midlothian plant,<br>temporarily impacting production.<br>2026<br> ▪ Solid demand expected, driven by the renewable energy and<br>data center markets;<br> ▪ Gradual recovery in the special steel markets, although<br>activity remains below historical levels;<br> ▪ USMCA negotiations are ongoing and, so far, there are no<br>concrete indications of relevant changes in steel tariffs in the<br>United States;<br> ▪ Start-up of Phase 1 of the Midlothian expansion.<br>* Does not constitute guidance.<br>BRAZIL<br>3Q26: Slight margin expansion<br> ▪ Slight growth expected in domestic sales, with a lower share of<br>exports in the sales mix.;<br> ▪ Relatively stable pricing dynamics, despite the continued<br>challenging competitive environment;<br> ▪ Costs are expected to remain elevated, mainly due to<br>metallurgical coal prices, logistics expenses, and freight costs;<br> ▪ Start-up of the Miguel Burnier Mining Project and the Scrap<br>Processing Project in Pindamonhangaba;<br>2026<br> ▪ More moderate growth in certain steel-consuming sectors,<br>such as construction and industry;<br> ▪ Continued monitoring of apparent steel consumption,<br>particularly amid inflationary pressures and a prolonged high-interest-rate environment;<br> ▪ Developments in trade defense measures (hot-rolled coil and<br>wire rod antidumping cases).<br> ▪ Ramp-up of the Miguel Burnier Mining Project
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	6<br>Q&A<br>To ask questions, please indicate your name<br>and institution via Raise Hand icon, wait to be<br>announced<br>.<br>Once announced, accept the prompt to<br>activate your microphone and camera<br>.
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	ANEXOS<br>7<br>Appendices
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	Workplace Safety<br>Continued focus on people Accident Frequency Rate¹<br>0.57 in 2Q26<br>0.99<br>1.16<br>1.28<br>1.10 1.08<br>0.87 0.83<br>0.76<br>0.70<br>0.59<br>0.73<br>0.84<br>0.57<br>2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2Q26<br>//<br>1 Number of accidents per million hours worked by each Gerdau employee.<br>2025<br>Deise Nunes-Silva &<br>Ana Flavia Reus Garcia<br>Charqueadas Unit 8<br>1Q26
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	9<br>QUARTERLY OVERVIEW<br> ◼ Total shipments were 2% higher than in<br>1Q26, driven by increased domestic volumes<br>of flat, long, and special steel products.<br> ◼ Net sales was 7% higher than in 1Q26,<br>reflecting slightly higher realized prices<br>across certain product lines and an<br>improved sales mix;<br> ◼ Cost of goods sold was 5% higher than in<br>1Q26, mainly due to higher shipments of<br>value-added products and cost pressures<br>related to metallic inputs, logistics, and<br>freight, partially offset by productivity<br>gains;<br> ◼ The average steel import penetration rate<br>stood at 18% in the quarter, its lowest level<br>since 1Q23. Despite the recent slowdown,<br>the 22.5% rate recorded in 1H26 remained<br>high compared with the Brazilian steel<br>industry’s historical levels.<br>UTILIZATION<br>RATE<br>~45%<br>Industry, Agriculture and Others<br>~40%<br>Civil construction<br>~15%<br>Automotive<br>PRODUCT PORTFOLIO¹ MARKETS OF OPERATION¹<br>30%<br>40%<br>20%<br>10%<br>Rebar and Reinforced<br>Concrete<br>Bars, Beams,<br>SBQ and Others<br>Hot Rolled<br>Coils<br>and Plates<br>Slabs and Other<br> ¹ The participation values of products and markets are approximate and do not refer to 2Q26 volumes.<br>Long Steel<br>70%<br>Flat Steel<br>30%<br>BRAZIL<br>Shipments<br>(1,000 tonnes)<br>Net Sales<br>(R$ million)<br>EBITDA<br>(R$ million and margin)<br>Rolled Steel 64% Crude<br>Steel 79%<br>2Q25 1Q26 2Q26<br>1,356 1,324 1,352<br>+2.1%<br>2Q25 1Q26 2Q26<br>7,317<br>6,271 6,686<br>+6.6%<br>877<br>578<br>705<br>2Q25 1Q26 2Q26<br>+22.0%<br>12.0% 9.2% 10.5%
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	Imports slowdown, but remain at high levels<br>for the Brazilian steel industry<br>Source: Comexstat<br>Steel import penetration rate<br>Source: Brazil Steel Institute<br>TRADE DEFENSE<br>1 New Origins: Egypt, Peru, Russia, Vietnam, India, Indonesia, Hong Kong, Thailand, Malaysia, Singapore and Taiwan.<br>Import Tariffs Antidumping<br>25% rate<br>7 NCMs of drawn products<br>4 NCMs of drawn products<br>10 NCMs: 7 flat steel and 3 long steel<br>4 NCMs: 1 flat steel and 3 long steel<br>Quota + 25% tariff<br>17 NCMs: 12 flat steel and 5 long steel<br>10 NCMs: 5 flat steel and 5 long steel<br>Flat bar<br>(alloy steel)<br>Plate<br>Hot-rolled coils<br>Wire rod<br>Production chain mobilization<br>Expansion of industrial sectors<br>working on trade defense issues<br>Surcharge claim: screws / automotive<br>(for hybrids and electrics) / gas<br>cylinders<br>Renewed<br>until<br>Jun/2027<br>Renewed<br>until<br>Jun/2027<br>Valid<br>through<br>Feb 2027<br>Valid through 2027<br>Positive preliminary<br>decision<br>Expected in 2H26<br>Valid through 2030<br>10<br>11.2% 10.9%<br>16.3%<br>15.4%<br>20.8% 20.8%<br>24.0%<br>22.0%<br>9.2%<br>7.1%<br>13.9%<br>11.2%<br>15.2% 15.0%<br>15.8%<br>14.2%<br>10.4%<br>9.3%<br>15.3%<br>13.6%<br>18.5% 18.5%<br>20.8%<br>19.1%<br>2019 2020 2021 2022 2023 2024 2025 1S26<br>Flat Long Total<br>0.6 0.4<br>1.4 0.9 1.6 1.7 1.9<br>0.8<br>0.8 1.5 1.5<br>2.6<br>2.2<br>2.8 3.1<br>3.9<br>1.7<br>1.7<br>2.2 2.0<br>4.0<br>3.1<br>4.4 4.8<br>5.8<br>5.0<br>0.0<br>1.0<br>2.0<br>3.0<br>4.0<br>5.0<br>6.0<br>7.0<br>8.0<br>9.0<br>2019 2020 2021 2022 2023 2024 2025 2026e<br>Outside the Gerdau Portfolio<br>Within the Gerdau Portfolio<br>1.6<br>3.4<br>Jan-Jun/26<br>annualized<br>0.4 0.4<br>1.1<br>0.6<br>1.6<br>1.0<br>1Q26 2Q26<br>65%<br>12%<br>23%<br>41%<br>25%<br>34%<br>China<br>New Origins<br>Other<br> ¹<br>Pre-COVID-19 Level
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	11<br>Shipments<br>(1,000 tonnes)<br>Net Sales<br>(R$ million)<br>EBITDA<br>(R$ million and margin)<br>QUARTERLY OVERVIEW<br> ◼ Total shipments were 6% higher than in<br>1Q26, with shipments of common long steel<br>reaching a record level under the<br>Company's current industrial<br>configuration;<br> ◼ Backlog exceeded 100 days in 2Q26,<br>reaching its highest level since 2021,<br>supported by resilient demand from the<br>data center and renewable energy<br>markets;<br> ◼ Net sales was 8% higher than in 1Q26,<br>driven by higher shipments, the expansion<br>of realized prices and a greater share of<br>value-added products in the sales mix;<br> ◼ Cost of goods sold was 5% higher than in<br>1Q26, reflecting higher shipments and<br>increased maintenance, fuel and energy<br>costs. 45%<br>50%<br>Bars<br>Shapes<br>5%<br>Downstream<br>~40%<br>Non-residential Construction and<br>Infrastructure<br>~60%<br>Manufacturing, Energy, and<br>Automotive<br>Long<br>Steel<br>100%<br> ¹ The participation values of products and markets are approximate and do not refer to 2Q26 volumes.<br>NORTH AMERICA UTILIZATION<br>RATE<br>PRODUCT PORTFOLIO¹ MARKETS OF OPERATION¹<br>Rolled Steel 90%<br>Crude<br>Steel 87%<br>2Q25 1Q26 2Q26<br>1,256 1,276 1,347<br>+5.5%<br>2Q25 1Q26 2Q26<br>9,139 9,349<br>10,126<br>+8.3%<br>2Q25 1Q26 2Q26<br>1,635<br>2,252<br>2,600<br>+15.4%<br>17.9% 24.1% 25.7%
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	Shipments<br>(1,000 tonnes)<br>Net Sales<br>(R$ million)<br>EBITDA<br>(R$ million and margin)<br>12<br>86%<br>UTILIZATION<br>RATE<br>Rolled Steel Crude<br>Steel 77%<br>QUARTERLY OVERVIEW<br>80%<br>20%<br>Bars & Beams<br>Downstream & Others ~70%<br>Distribution (semi-finished)<br>~20%<br>Civil construction<br>~10%<br>Industry<br>SOUTH AMERICA<br>288 306<br>282<br>2Q25 1Q26 2Q26<br>-7,8%<br>2Q25 1Q26 2Q26<br>1,331 1,396<br>1,279<br>-8.4%<br>149<br>186<br>205<br>2Q25 1Q26 2Q26<br>+10,4%<br>11.2% 13.3% 16.0%<br>PRODUCT PORTFOLIO¹ MARKETS OF OPERATION¹<br>Long Steel<br>100%<br> ◼ Shipments were 8% lower than in 1Q26,<br>reflecting the pull-forward of volumes in<br>Peru in 1Q26 and weaker demand in the<br>main sectors served in Argentina and<br>Uruguay;<br> ◼ Net sales was 8% lower than in 1Q26,<br>reflecting lower shipments and the<br>depreciation of the U.S. dollar against the<br>Brazilian real;<br> ◼ Net sales per tonne remained stable<br>compared with 1Q26, supported by an<br>improved sales mix in Argentina and stable<br>prices in Peru;<br> ◼ Cost of goods sold per tonne remained<br>stable compared with 1Q26, supported by<br>higher capacity utilization in Argentina and<br>Uruguay and operational efficiency gains in<br>Peru.<br> ¹ The participation values of products and markets are approximate and do not refer to 2Q26 volumes.
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	Operational performance<br>1 Non-accounting measurement prepared by the Company. The Company states the Adjusted EBITDA to provide additional information on cash generated in the period.	2 I Includes iron ore and co-products sales.<br>Importance of geographic diversification for resilient results<br>ADJUSTED EBITDA (R$ million) and ADJUSTED EBITDA MARGIN ¹ NET SALES² (R$ million)<br>North Am. Brazil South Am. Eliminations<br>(301)<br>Eliminations<br>10,126<br>6,686<br>9,349<br>6,271<br>(220)<br>1,396<br>Net Sales<br>2Q26<br>Net Sales<br>1Q26<br>777<br>North Am.<br>415<br>Brazil<br>(117)<br>South Am.<br>81 16,716 17,871<br>1,279<br>+7%<br>-171<br>578 705<br>(57) (80)<br>2,252<br>186<br>EBITDA 1Q26 North Am.<br>127<br>Brazil<br>19<br>South Am.<br>(23)<br>Eliminations<br>2,600<br>205<br>EBITDA 2Q26<br>2,958<br>17.7%<br>3,430<br>19.2%<br>348<br>+16%<br>1Q26 vs.<br>2Q26<br>877<br>965<br>705<br>(100)<br>1,635<br>149<br>EBITDA 2Q25 North Am.<br>(172)<br>Brazil<br>56<br>South Am.<br>20<br>Eliminations<br>2,600<br>205<br>(80)<br>EBITDA 2Q26<br>2,561<br>14.6%<br>3,430<br>19.2%<br>+34%<br>(261)<br>Eliminations<br>10,126<br>6,686<br>9,139<br>7,317<br>Net Sales<br>2Q26<br>1,331<br>Net Sales<br>2Q25<br>987<br>North Am.<br>(631)<br>Brazil<br>(52)<br>South Am.<br>17,526 17,871<br>(220)<br>41<br>1,279<br>2Q25 vs. +2%<br>2Q26<br>13
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	14<br>Cash flow & net cash variation<br>1<br>Includes thecash effect of customers, inventories,andsuppliersaccounts.	2<br>Includes the addition of R$1.1billionin CAPEXinvestments in 2Q26, adjusted for the cash effect ofthechange in accounts payable to Property, plant, and equipment<br>suppliersin theamount of R$56million, relatedto acquisitions from previousperiodspaid in the currentperiod.	4<br>Includes the payment ofinterest on loans and financing andinterest on lease.	5 ProportionalEBITDA ofthe joint venturesnet of<br>dividendsreceivedfrom these JVs.	6 Disbursements for otherintangibleassets and lease payments.	7 Other changes includeOther Assetsand Liabilities accounts.<br>CASH FLOW<br>(R$ million)<br>NET CASH VARIATION<br>(R$ million)<br>5,590<br>1Q26 Cash<br>237<br>2Q26 Free<br>Cash Flow<br>62<br>Financing<br>Variation<br>(363)<br>Dividends<br>(105)<br>Share buyback<br>5<br>M&A<br>14<br>Exchange<br>variation & other<br>5,440<br>2Q26 Cash<br>3,430<br>2Q26<br>Adjusted<br>EBITDA<br>(933)<br>Working<br>Capital 1<br>(657)<br>Income Tax 2<br>(1,064)<br>CAPEX3<br>(630)<br>Interest4<br>56<br>JVs<br>Proportional<br>EBITDA 5<br>(171)<br>Intangibles<br>and Leasing 6<br>206<br>Other 7<br>237<br>2Q26 Free<br>Cash Flow
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	CASH, DEBT, AND LEVERAGE<br>(R$ billion)<br>LIQUIDITY POSITION AND DEBT AMORTIZATION1<br>(R$ billion)<br>RATINGS:<br> ¹ Global Revolving Credit Facility<br>POLÍTICA FINANCEIRA GERDAU:<br>15<br>GROSS DEBT<br> < R$12 BILLION<br>AVERAGE TERM<br> > 6 YEARS<br>NET DEBT /EBITDA<br> ≤1.5X BBB POSITIVE BBB STABLE Baa2 STABLE<br>GERDAU FINANCIAL POLICY :<br>9.1<br>9.0<br>2Q25<br>8.8<br>9.9<br>3Q25<br>7.8<br>6.4<br>4Q25<br>8.2<br>5.6<br>1Q26<br>8.1<br>5.4<br>2Q26<br>18.1 18.6<br>14.2 13.8 13.6<br>Net Debt Cash<br>0.85x 0.81x 0.76x 0.74x 0.69x<br>Gross Debt Net debt/Adjusted EBITDA<br>Liquidity & indebtedness<br>Cash & Equiv. RCF ¹ Bonds Debentures Bank loans<br>5.5<br>4.5<br>Liquidity<br>0.3<br>2026<br>0.9<br>1.0<br>2027<br>1.5<br>0.1<br>2028<br>1.5<br>0.1<br>2029<br>1.4<br>0.3<br>2032<br>3.4<br>2035<br>2.8<br>0.3<br>2036<br>onwards<br>10.0<br>AVERAGE COST<br>7.6 years<br>AVERAGE TERM<br>BRL: CDI – 0.15% Y/Y<br>USD: 6.13% Y/Y<br>15
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	Return to shareholders<br>Continued share buyback and distribution of dividends<br>above the mandatory minimum 2026 Share Buyback Program<br> ◼Total program:<br>up to 56.4 million shares;<br> ◼ Financial volume repurchased<br>until July 17, 2026: R$333.8 million<br>GGBR4/GGBR3;<br> ◼Cancellation of 85% of the total<br>repurchased.<br>Repurchased<br>31%<br>69%<br>240<br>555<br>198<br>354 451<br>492<br>213<br>183<br>206 105<br>2Q25 3Q25 4Q25 1Q26 2Q26¹<br>732 769<br>381<br>560 556<br>89.9% 74.9%<br>-30.9%<br>58.8% 40.3%<br>Dividends distributed (R$ million) Buyback (R$ million) Payout²<br>DISTRIBUTION OF DIVIDENDS<br>AMOUNT<br>PER SHARE<br>R$451 million<br>R$0.23<br>2Q26<br>Gerdau S.A.<br>R$146 million<br>R$0.11<br>Metalúrgica Gerdau S.A.<br>1 Dividends consider the amounts resolved to be paid on September ´11,2026 and buyback considers operations carried out until June 30, 2026.	2 Measurement<br>calculated considering payout and shares repurchased divided by the parent company’s corporate net income after recording the reserves provided for in its Bylaws. 16<br>Metalúrgica Gerdau S.A.<br> ◼Total program:<br>up to 10 million preferred shares;<br> ◼ Financial volume repurchased<br>until July 17, 2026: R$21.2 million<br>GOAU4;<br> ◼Cancellation of 100% of the total<br>repurchased.<br>Repurchased<br>22%<br>78%<br>Gerdau S.A.<br>To repurchase<br>To repurchase
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	CAPEX<br>Investments in business growth, competitiveness, and<br>maintenance<br>2026e¹<br>Maintenance Coking plants +<br>blast furnaces Competitiveness<br>2.3<br>1.8<br>0.6<br>R$ 4.7 bi²<br>1 Doesnotinclude investments injointly-controlled entitiesandassociates.<br>2 Exposure by currency: 2026, ~55% in US$ and ~45% in R$.<br>2Q26¹<br>0.4<br>0.6<br>R$ 1.0 bi<br>Miguel Burnier sustainable mining<br>platform – grinding<br>17<br>6M26¹<br>0.9<br>1.2<br>R$ 2.1 bi
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	Competitiveness CAPEX<br>Main Projects: status 2Q26<br>MIGUEL BURNIER MINING<br>PHYSICAL<br>PROGRESS<br>FINANCIAL<br>PROGRESS<br>95% 90%<br>Screening<br>START-UP: SECOND SEMESTER OF 2026<br>POTENTIAL EBITDA: ~ R$1.1 BILLION<br>CAPEX: ~ R$3.6 BILLION<br>SCRAP PROCESSING<br>PINDAMONHANGABA<br>Scrap Yard<br>PHYSICAL<br>PROGRESS<br>FINANCIAL<br>PROGRESS<br>90% 85%<br>START-UP: SECOND SEMESTER OF 2026<br>POTENTIAL EBITDA: ~R$100 MILLION<br>CAPEX: ~ R$ 400 MILLION<br>MIDLOTHIAN EXPANSION<br> “PHASE 1”<br>Midlothian Unit<br>PHYSICAL<br>PROGRESS<br>FINANCIAL<br>PROGRESS<br>80% 95%<br>START-UP (PHASE 1): SECOND SEMESTER OF 2026<br>POTENTIAL EBITDA: ~R$ 275 MILLION<br>CAPEX: ~ R$ 1.2 BILLION<br>18
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	Follow Gerdau on social media.<br>Earnings<br>Release 3Q26<br>October 26,2026<br>Videoconference<br>October 27,2026<br>[email protected]	ri.gerdau.com
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