Fortuna Mining Corp.TSX: FVI

Fortuna reports third quarter 2026 production of 69,665 gold equivalent ounces and advances key growth initiatives

· Issued by Fortuna Mining Corp. via GlobeNewswire

VANCOUVER, British Columbia, Oct. 07, 2026 (GLOBE NEWSWIRE) -- Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) reports production results for the third quarter and first nine months of 2026 from its three operating mines in West Africa and Latin America. This release also provides updates on key growth initiatives, safety performance, and other activities across the Company’s portfolio. Unless otherwise indicated, all monetary amounts are expressed in U.S. dollars.

Q3 2026 highlights

Production

  • Production totaled 69,665 gold equivalent ounces (“GEO”)1 in the third quarter of 2026, compared with 72,217 GEO in Q2 20262,3 and 72,462 GEO in Q3 20254,5. Production for the first nine months of 2026 totaled 214,754 GEO, and the Company remains on track to achieve its annual production guidance of 281,000 to 305,000 GEO6.

Growth initiatives

  • Approved a 30% expansion of the Séguéla processing plant, supporting annual gold production growth to target over 200,000 ounces from H2 2028.
  • Significantly expanded our Diamba Sud Gold Project concession holdings with the acquisition of the immediately adjacent 190 km² Bambadji Project, consolidating ~60 kilometers of prospective strike along the gold prolific Senegal-Mali Shear Zone.

Safety

  • The Total Recordable Injury Frequency Rate (TRIFR) was 1.20 per million hours worked in Q3 2026, compared to 1.21 in Q2 20267.

Q3 and 9-month 2026 consolidated GEO production

 GEO Production
 Q3 2026Q2 20269-Month 20262026 Annual Guidance 6
     
Séguéla, Côte d’Ivoire33,74441,683117,443160,000 - 170,000
Lindero, Argentina26,02420,82968,39892,000 - 102,000
Caylloma, Peru9,8979,70528,91329,000 - 33,000
Total69,66572,217214,754281,000 - 305,000

Notes:

  1. Gold equivalent ounces (“GEO”) include gold, silver, lead, and zinc and are calculated using the following metal prices: $4,281/oz Au, $62.70/oz Ag, $1,871/t Pb, and $3,832/t Zn, or Au:Ag = 1:68.27, Au:Pb = 1:2.29, Au:Zn = 1:1.12
  2. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”
  3. GEO includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,446/oz Au, $75.21/oz Ag, $1,930/t Pb and $3,464/t Zn, or Au:Ag = 1:59.11, Au:Pb = 1:2.30, Au:Zn = 1:1.28.
  4. Refer to Fortuna news release dated October 8, 2025, “Fortuna delivers production of 72,462 gold equivalent ounces for the third quarter of 2025.”
  5. GEO includes gold, silver, lead, and zinc and is calculated using the following metal prices: $3,467/oz Au, $39.35/oz Ag, $1,962/t Pb and $2,815/t Zn, or Au:Ag = 1:88.10, Au:Pb = 1:1.77, Au:Zn = 1:1.23.
  6. Refer to Fortuna news release dated January 15, 2026, “Fortuna Achieves 2025 Production Guidance, Delivering 317,001 GEO, and Issues 2026 Outlook.”
  7. Refer to Fortuna “Management´s Discussion and Analysis for the three and six months ended June 30, 2026”

West Africa Region

Séguéla Mine, Côte d’Ivoire: 30% plant expansion approved; annual gold production to target over 200,000 ounces from H2 2028

 Q3 2026Q2 20261
Tonnes milled402,440421,464
Average tpd milled4,3744,581
Gold grade (g/t)2.673.46
Gold recovery (%)90.7592.1
Gold production (oz)233,74441,683

Notes:

  1. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”
  2. Production includes doré only

Mining

During the third quarter of 2026, Séguéla mined 340,714 tonnes of ore at an average grade of 2.69 g/t Au from the Antenna, Ancien, Sunbird, and Koula pits, containing an estimated 29,516 ounces of gold. This compared with 433,231 tonnes of ore mined at an average grade of 3.06 g/t Au in the second quarter of 2026, containing an estimated 42,555 ounces of gold. Waste mined during the quarter totaled 6.5 million tonnes, resulting in a strip ratio of 19.1:1. At the Sunbird South pit, a further 623,390 tonnes of waste were excavated to advance access to the planned portal location for the Sunbird underground mine.

Third quarter mining performance and gold production were affected by reduced equipment availability at one of the Company’s mining contractors and a temporary site-wide stoppage caused by a blockade by artisanal miners operating in the surrounding area. The blockade was lifted following intervention by a government law enforcement agency, and normal operations resumed. These disruptions reduced mining volumes and delayed access to higher-grade ore. Corrective measures were implemented with the mining contractor, and mining volumes returned to planned levels in September.

Processing

Séguéla produced 33,744 ounces of gold in the third quarter of 2026, compared with 41,683 ounces in the second quarter, reflecting lower tonnes milled, head grade, and recovery. The plant processed 402,440 tonnes at an average head grade of 2.67 g/t Au and at a recovery rate of 90.75%.

Gold production is expected to recover to first-half 2026 levels in the fourth quarter as mining volumes normalize and access to higher-grade ore improves. The 1.35% quarter-over-quarter decrease in plant recovery was attributed to localized metallurgical characteristics of the Koula ore.

Year-to-date production

Séguéla produced 117,443 ounces of gold in the first nine months of 2026 and remains on track to achieve the lower end of its annual production guidance.

Project Updates

30% Plant Expansion

During the third quarter, the Board approved a $109 million budget for a 30% expansion of the Séguéla processing plant. The expansion will increase annual throughput to 2.3 million tonnes, restore gold recoveries to the original design rate of 94%, and support annual gold production target of over 200,000 ounces from the second half of 2028.

Detailed engineering is underway with Lycopodium, the EPCM contractor. The owner’s project team is 75% onboarded, and vendors have been selected for key equipment and infrastructure packages. Project completion and commissioning are scheduled for the third quarter of 2028.

Sunbird Underground Project

The Sunbird Underground Project, which is expected to begin supplying mill feed to the expanded plant in 2028, continued to advance during the quarter. The Environmental and Social Impact Assessment (“ESIA”) has been approved, with final permitting expected in the fourth quarter of 2026.

The underground project team has been recruited and is advancing pre-development and operational readiness activities. Major mining equipment has been ordered for delivery in line with the project schedule, and portal construction and development are expected to commence in the second quarter of 2027.

The underground mine design supports expected steady-state production of approximately 1 million tonnes per annum, equivalent to 40% of the expanded plant throughput.

The Sunbird underground deposit remains open at depth, with additional drilling planned from future underground platforms to test its growth potential.

Exploration Activities

Exploration during the quarter focused on converting Inferred Mineral Resources at the Sunbird Underground and Kingfisher deposits and on step-out drilling beyond the boundaries of the current Inferred Resources.

During the fourth quarter of 2026 and into 2027, drilling will focus on other priority targets, including the underground potential at Ancien, southern and depth extensions to the Antenna pit, and emerging prospects across the Séguéla property.

Diamba Sud Gold Project, Senegal: Drilling commences at the Bambadji property

During the third quarter of 2026, Fortuna acquired the 190 km² Bambadji advanced gold exploration project, immediately adjacent to Diamba Sud. The acquisition consolidates approximately 60 kilometers of prospective strike along the Senegal-Mali Shear Zone, where exploration has commenced with six drill rigs.

Diamba Sud continues to advance toward a final investment decision in the fourth quarter as the Company completes the final stages of negotiations for the tax stability agreement with the State of Senegal. First gold pour remains on track for the second quarter of 2028.

Latin America region

Lindero Mine, Argentina: Gold production increases 25% quarter-over-quarter; on track to meet annual guidance

 Q3 2026Q2 20261
Ore placed on pad (t)1,859,7311,558,750
Gold grade (g/t)0.630.64
Gold production2 (oz)26,02420,829

Notes:

  1. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”
  2. Production includes doré, gold-in-carbon, and gold in copper concentrate.

Mining

During the third quarter of 2026, Lindero mined 2.3 million tonnes of ore at a strip ratio of 0.85:1 and stacked 1.9 million tonnes on the leach pad at an average grade of 0.63 g/t, containing an estimated 37,746 ounces of gold. Gold ounces placed on the leach pad increased by 18% compared with the second quarter, driven by improved mechanical availability across the processing circuit and higher crushing and stacking rates.

During the first nine months of 2026, Lindero placed approximately 99% of the planned gold ounces for the period on the leach pad.

Processing

Lindero produced 26,024 ounces of gold in the third quarter of 2026, a 25% increase from the second quarter and consistent with the second-half operating plan.

Year-to-date production

Lindero produced 68,398 ounces of gold in the first nine months of 2026 and remains on track to achieve its annual production guidance.

Exploration activities

Drilling to test extensions of mineralization beneath the ultimate Mineral Reserve pit shell at Lindero was completed as planned during the quarter. Assay results have been reported from the commercial laboratory and will be evaluated to determine the potential for future resource growth.

Caylloma Mine, Peru: On track to exceed annual production guidance; tailings storage expansion 64% complete

 Q3 2026Q2 20261
Tonnes milled140,832141,337
Average tpd milled1,5651,588
Silver grade (g/t)6662
Silver recovery2 (%)83.2682.26
Silver production (oz)247,367231,294
Lead grade (%)2.982.76
Lead recovery (%)90.4890.89
Lead production (lbs)8,357,5397,815,387
Zinc grade (%)4.084.26
Zinc recovery (%)89.6890.64
Zinc production (lbs)11,370,29412,037,240
GEO production (oz)9,89739,7054

Notes:

  1. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”
  2. Metallurgical recovery for silver is calculated based on silver content in lead concentrate.
  3. GEO production includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,281/oz Au, $62.70/oz Ag, $1,871/t Pb and $3,832/t Zn, or Au:Ag = 1:68.27, Au:Pb = 1:2.29, Au:Zn = 1:1.12.
  4. GEO production includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,446/oz Au, $75.21/oz Ag, $1,930/t Pb and $3,464/t Zn, or Au:Ag = 1:59.11, Au:Pb = 1:2.30, Au:Zn = 1:1.28.

Mining

Caylloma mined 139,868 tonnes of ore in the third quarter of 2026, in line with the mine plan. Plant throughput of 140,832 tonnes was broadly consistent with the second quarter, with the difference between tonnes mined and processed reflecting the use of ore stockpile. 

Processing

During the third quarter, Caylloma produced 247,367 ounces of silver, a 7% increase from the second quarter, supported by a higher average head grade of 66 g/t and improved recovery. Zinc and lead production totaled 11.4 million pounds and 8.4 million pounds, respectively, at average head grades of 4.08% zinc and 2.98% lead.

The quarter's performance reflects steady plant operations, consistent throughput, and continued strong contribution from base metal production. 

Year-to-date production

Caylloma produced 9,897 GEO in the third quarter and 28,913 GEO during the first nine months of 2026, close to the lower end of its annual guidance range of 29,000 to 33,000 GEO and positioning the operation to exceed its annual guidance by year-end.

Project update

As of September 30, 2026, the expansion of the tailings storage facility No. 3 was approximately 64% complete and on schedule for completion by year-end. The expansion is expected to provide the additional tailings storage capacity required to support operations for several more years.

Qualified Person

Eric Chapman, Senior Vice President of Technical Services for Fortuna Mining Corp., is a Professional Geoscientist registered with Engineers and Geoscientists British Columbia (Registration No. 36328), and a Qualified Person as defined by National Instrument 43-101- Standards of Disclosure for Mineral Projects. Mr. Chapman has reviewed and approved the scientific and technical information contained in this news release and has verified the underlying data. 

About Fortuna Mining Corp.

Fortuna Mining Corp. is a Canadian precious metals mining company with three operating mines, the feasibility-stage Diamba Sud Gold Project in Senegal, and a portfolio of exploration projects in Argentina, Côte d’Ivoire, Guinea, Guyana, and Peru. Sustainability is at the core of our operations and stakeholder relationships. We produce gold and silver while creating long-term shared value through efficient production, environmental stewardship, and social responsibility. For more information, please visit our website at www.fortunamining.com

ON BEHALF OF THE BOARD 

Jorge A. Ganoza 
CEO and Director
Fortuna Mining Corp.

Investor Relations: 

Carlos Baca | info@fmcmail.com | fortunamining.com | X | LinkedIn | YouTube | Instagram | TikTok

Forward-looking Statements

This news release contains forward-looking statements which constitute “forward-looking information” within the meaning of applicable Canadian securities legislation and “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995 (collectively, “Forward-looking Statements”). All statements included herein, other than statements of historical fact, are Forward-looking Statements and are subject to a variety of known and unknown risks and uncertainties which could cause actual events or results to differ materially from those reflected in the Forward-looking Statements. The Forward-looking Statements in this news release include, without limitation, statements about the Company’s plans for its mines and mineral properties; statements reiterating the Company’s 2026 annual production guidance and the likelihood of the Company meeting such annual production guidance, including that the Caylloma Mine is on track to exceed annual gold production guidance; statements relating to the planned underground project at the Séguéla Mine and the anticipated timing for final permitting and commencement of portal construction and development and for supplying mill feed to the expanded plant; statements regarding the processing plant expansion at Séguéla, including the estimated resulting increase in tonnes milled, improvement in recoveries, annual gold production growth, and anticipated project completion and commissioning timeline; expectations that gold production at Séguéla will recover to first-half 2026 levels in the fourth quarter; statements regarding the Company’s brownfields and greenfields exploration activities; statements regarding the development of the Diamba Sud gold project, including advancement towards a final investment decision and first gold pour; statements regarding the project to increase tailings storage facility at the Caylloma Mine, including the expected completion timeline; the Company’s business strategy, plans and outlook; the merit of the Company’s mines and mineral properties; the future financial or operating performance of the Company; the Company’s ability to comply with contractual and permitting or other regulatory requirements; approvals and other matters. Often, but not always, these Forward-looking Statements can be identified by the use of words such as “estimated,” “potential,” “open,” “future,” “assumed,” “projected,” “used,” “detailed,” “has been,” “gain,” “planned,” “reflecting,” “will,” “anticipated,” “estimated,” “containing,” “remaining,” “to be,” or statements that events, “could” or “should” occur or be achieved and similar expressions, including negative variations.

Forward-looking Statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance, or achievements of the Company to be materially different from any results, performance or achievements expressed or implied by the Forward-looking Statements. Such uncertainties and factors include, among others, operational risks associated with mining and mineral processing; uncertainty relating to Mineral Resource and Mineral Reserve estimates; uncertainty relating to capital and operating costs, production schedules and economic returns; risks relating to the Company’s ability to replace its Mineral Reserves; risks associated with mineral exploration and project development; uncertainty relating to the repatriation of funds as a result of currency controls; environmental matters including obtaining or renewing environmental permits and potential liability claims; uncertainty relating to nature and climate conditions; laws and regulations regarding the protection of the environment (including greenhouse gas emission reduction and other decarbonization requirements and the uncertainty surrounding the interpretation of omnibus Bill C-59 and the related amendments to the Competition Act (Canada); risks associated with political instability and changes to the regulations governing the Company’s business operations; changes in national and local government legislation, taxation, controls, regulations and political or economic developments in countries in which the Company does or may carry on business; risks associated with war, hostilities or other conflicts, such as the Ukrainian – Russian, Israel- – Hamas, and Iran – Israel and United States conflicts, and the impacts such conflicts may have on global economic activity; risks relating to the termination of the Company’s mining concessions in certain circumstances; developing and maintaining relationships with local communities and stakeholders; risks associated with losing control of public perception as a result of social media and other web-based applications; potential opposition to the Company’s exploration, development and operational activities; risks related to the Company’s ability to obtain adequate financing for planned exploration and development activities; property title matters; risks relating to the integration of businesses and assets acquired by the Company; impairments; risks associated with climate change legislation; reliance on key personnel; adequacy of insurance coverage; operational safety and security risks; legal proceedings and potential legal proceedings; uncertainties relating to general economic conditions; risks relating to a global pandemic, which could impact the Company’s business, operations, financial condition and share price; competition; fluctuations in metal prices; risks associated with entering into commodity forward and option contracts for base metals production; fluctuations in currency exchange rates and interest rates; tax audits and reassessments; risks related to hedging; uncertainty relating to concentrate treatment charges and transportation costs; sufficiency of monies allotted by the Company for land reclamation; risks associated with dependence upon information technology systems, which are subject to disruption, damage, failure and risks with implementation and integration; labor relations issues; as well as those factors discussed under “Risk Factors” in the Company's Annual Information Form. Although the Company has attempted to identify important factors that could cause actual actions, events, or results to differ materially from those described in Forward-looking Statements, there may be other factors that cause actions, events, or results to differ from those anticipated, estimated or intended.

Forward-looking Statements contained herein are based on the assumptions, beliefs, expectations and opinions of management, including but not limited to the accuracy of the Company’s current Mineral Resource and Mineral Reserve estimates; that the Company’s activities will be conducted in accordance with the Company’s public statements and stated goals; that there will be no material adverse change affecting the Company, its properties or its production estimates (which assume accuracy of projected head grade, mining rates, recovery timing, and recovery rate estimates and may be impacted by unscheduled maintenance, labor and contractor availability and other operating or technical difficulties); the duration and effect of global and local inflation; geo-political uncertainties on the Company’s production, workforce, business, operations and financial condition; the expected trends in mineral prices, inflation and currency exchange rates; that all required approvals and permits will be obtained for the Company’s business and operations on acceptable terms including for the construction of a mine at the Diamba Sud Project and the underground mining method at the Séguéla Mine; that there will be no significant disruptions affecting the Company’s operations and such other assumptions as set out herein. Forward-looking Statements are made as of the date hereof and the Company disclaims any obligation to update any Forward-looking Statements, whether as a result of new information, future events, or results or otherwise, except as required by law. There can be no assurance that these Forward-looking Statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on Forward-looking Statements.

Cautionary Note to United States Investors Concerning Mineral Resources and Mineral Reserves

Technical disclosure regarding the Company’s properties included herein has been prepared in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects (“NI 43-101”) and the Canadian Institute of Mining, Metallurgy, and Petroleum Definition Standards on Mineral Resources and Mineral Reserves. Canadian standards, including NI 43-101, differ from the requirements of the Securities and Exchange Commission, and information included herein may not be comparable to similar information disclosed by U.S. companies.

A PDF accompanying this announcement is available at http://ml.globenewswire.com/Resource/Download/57c5fafa-c5c0-489b-ba1d-38ca4b4ac82c


Attached document

Contents
  1. CONTENTS · page 3
  2. BUSINESS OVERVIEW · page 4
  3. CORPORATE DEVELOPMENTS · page 4
  4. Awalé Investment · page 4
  5. Séguéla Plant Expansion · page 4
  6. Financial · page 4
  7. Operating · page 5
  8. Health & Safety · page 5
  9. Environment · page 5
  10. Community Engagement · page 5
  11. Operating and Financial Highlights From Continuing Operations · page 6
  12. FINANCIAL RESULTS FROM CONTINUING OPERATIONS · page 7
  13. Sales · page 7
  14. Second Quarter 2026 vs Second Quarter 2025 · page 7
  15. First Six Months of 2026 vs First Six Months of 2025 · page 7
  16. Operating Income (Loss) and Adjusted EBITDA · page 8
  17. Second Quarter 2026 vs Second Quarter 2025 · page 8
  18. First Six Months of 2026 vs First Six Months of 2025 · page 9
  19. All-in Sustaining Cost (“AISC”) · page 9
  20. Second Quarter 2026 vs Second Quarter 2025 · page 9
  21. First Six Months of 2026 vs First Six Months of 2025 · page 9
  22. General and Administrative (“G&A”) Expenses · page 10
  23. Foreign Exchange · page 10
  24. Income Tax Expense · page 10
  25. RESULTS OF OPERATIONS · page 12
  26. Lindero Mine, Argentina · page 12
  27. Quarterly Operating and Financial Highlights · page 12
  28. Séguéla Mine, Côte d’Ivoire · page 13
  29. Quarterly Operating and Financial Highlights · page 13
  30. Caylloma Mine, Peru · page 14
  31. Quarterly Operating and Financial Highlights · page 15
  32. QUARTERLY INFORMATION · page 16
  33. EXPLORATION AND EVALUATION · page 17
  34. Côte d’Ivoire · page 17
  35. Peru · page 17
  36. Argentina · page 17
  37. Senegal · page 17
  38. Guyana · page 18
  39. LIQUIDITY AND CAPITAL RESOURCES · page 19
  40. Cash and Cash Equivalents · page 19
  41. Operating Activities · page 19
  42. Investing Activities · page 19
  43. Financing Activities · page 19
  44. Capital Resources · page 20
  45. Contractual Obligations · page 20
  46. Off-Balance Sheet Arrangements · page 20
  47. FINANCIAL INSTRUMENTS · page 20

Page 1

Fortuna Mining Corp. Management’s Discussion and Analysis For the three and six months ended June 30, 2026

## Fortuna Mining Corp. ### Management’s Discussion and Analysis For the three and six months ended June 30, 2026 (in US dollars, tabular amounts in millions, except where noted) # MANAGEMENT’S DISCUSSION AND ANALYSIS ## For the three and six months ended June 30, 2026 ## As of August 5, 2026 #### Fortuna | 1

(in US dollars, tabular amounts in millions, except where noted)

Fortuna | 1

Page 2

This Management’s Discussion and Analysis (“MD&A”) of the financial position and results of operations for Fortuna Mining Corp. (the “Company” or “Fortuna”) (TSX: FVI and NYSE: FSM) should be read in conjunction with the audited consolidated financial statements of the Company for the years ended December 31, 2025 and 2024 (the “2025 Financial Statements”), and the unaudited condensed interim consolidated financial statements of the Company for the three and six months ended June 30, 2026 and 2025 (the “Q2 2026 Financial Statements”) and the related notes thereto which have been prepared in accordance with IAS 34, Interim Financial Reporting, using accounting policies consistent with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”). For further information on the Company, reference should be made to its public filings, including its annual information form, on SEDAR+ at www.sedarplus.ca and on EDGAR at www.sec.gov/edgar.

This MD&A is prepared by management and approved by the Board of Directors as of August 5, 2026. The information and discussion provided in this MD&A covers the three and six months ended June 30, 2026 and 2025, and where applicable, the subsequent period up to the date of issuance of this MD&A. Unless otherwise noted, all dollar amounts in this MD&A are expressed in United States (“US”) dollars. References to "$" or "US$" in this MD&A are to US dollars and references to C$ are to Canadian dollars.

Fortuna has a number of direct and indirect subsidiaries which own and operate assets and conduct activities in different jurisdictions. The terms "Fortuna" or the "Company" are used in this MD&A for simplicity of the discussion provided herein and may include references to subsidiaries that have an affiliation with Fortuna, without necessarily identifying the specific nature of such affiliation.

This MD&A contains forward-looking statements. Readers are cautioned as to the risks and uncertainties related to the forward-looking statements, the risks and uncertainties associated with investing in the Company’s securities and the technical and scientific information under National Instrument 43-101 – Standards for Disclosure of Mineral Projects (“NI 43-101”) concerning the Company’s material properties, including information about mineral reserves and resources, which classifications differ from the requirements required by the U.S. Securities and Exchange Commission (“SEC”) as set out in the cautionary note on page 32 of this MD&A. All forward-looking statements are qualified by cautionary notes in this MD&A as well as risks and uncertainties discussed in the Company’s Annual Information Form for fiscal 2025 dated March 23, 2026 and its Management Information Circular dated May 7, 2026, which are available on SEDAR+ and EDGAR.

This MD&A uses certain Non-IFRS financial measures and ratios that are not defined under IFRS, including but not limited to: all-in costs, cash cost per ounce of gold; cash cost per ounce of gold equivalent; all-in sustaining costs; all-in sustaining cash cost per ounce of gold sold; all-in sustaining cash cost per ounce of gold equivalent sold; cash cost per payable ounce of silver equivalent; all-in sustaining cash cost per payable ounce of silver equivalent sold; sustaining capital, growth capital; all-in cash cost per payable ounce of silver equivalent sold; free cashflow and free cashflow from ongoing operations; adjusted net income; adjusted attributable net income, adjusted EBITDA, EBITDA margin, net debt, total net debt to adjusted EBITDA ratio and working capital which are used by the Company to manage and evaluate operating performance at each of the Company’s mines and are widely reported in the mining industry as benchmarks for performance. Non-IFRS financial measures and non-IFRS ratios do not have a standard meaning under IFRS, and may not be comparable to similar financial measures disclosed by other issuers. Non-IFRS measures are further discussed in the “Non-IFRS Measures” section on page 21 of this MD&A.

Where applicable, the Company has presented operating and financial results for the previous financial periods based on its continuing operations. Contributions from the San Jose and Yaramoko Mines have been removed as they were disposed of during the second quarter of 2025.

Fortuna | 2

Page 3

CONTENTS

Business Overview Highlights Financial Results Results of Operations Quarterly Information Exploration and Evaluation Liquidity and Capital Resources

Financial Instruments 20 Share Position & Outstanding Options & Equity Based Share Units 21 Related Party Transactions 21

Non-IFRS Financial Measures Risks and Uncertainties Critical Accounting Estimates, Assumptions, and Judgements Controls and Procedures Cautionary Statement on Forward-Looking Statements

Cautionary Note to United States Investors Concerning Estimates of Reserves and Resources 39

Fortuna | 3

Page 4

BUSINESS OVERVIEW

Fortuna is a growth focused Canadian precious metals mining company with operations and projects in South America and West Africa. The Company produces gold, silver, and base metals and generates shared value over the long-term through efficient production, environmental protection, and social responsibility. As at the date of the MD&A, the Company has three operating mines and exploration activities in Argentina, Côte d'Ivoire, Peru, Guyana, Guinea and Mexico as well as the Diamba Sud gold project in Senegal.

The Company operates the open pit Lindero gold mine (“Lindero” or the “Lindero Mine”) located in northern Argentina, the underground Caylloma silver, lead, and zinc mine (“Caylloma” or the “Caylloma Mine”) located in southern Peru, and the open pit Séguéla gold mine (“Séguéla” or the “Séguéla Mine”) located in southwestern Côte d’Ivoire. Each of the Company's producing mines is considered to be a separate reportable segment, along with the Company's corporate stewardship segment.

Fortuna is a publicly traded company incorporated and domiciled in British Columbia, Canada. Its common shares are listed on the New York Stock Exchange (“NYSE”) under the trading symbol FSM and on the Toronto Stock Exchange (“TSX”) under the trading symbol FVI.

CORPORATE DEVELOPMENTS

Awalé Investment

On July 28, 2026, the Company acquired 5,695,312 common shares of Awalé Resources Limited (“Awalé”), a mineral exploration company in Côte d’Ivoire, for $3.4 million, thereby increasing the Company’s investment to 20,732,905 common shares of Awalé and maintaining Fortuna’s ownership interest in Awalé at approximately 14.7%.

Séguéla Plant Expansion

On July 29, 2026, the Company announced an investment decision on the Séguéla Plant Expansion. The project includes an expansion of the Séguéla processing facility, upgrades to supporting infrastructure, and development of the Sunbird underground mine. Together, these investments are expected to increase throughput, improve gold recoveries, accelerate production from Séguéla’s growing resource base, and reinforce the mine’s position as a cornerstone asset in Fortuna’s portfolio. The expansion is expected to support average annual gold production of more than 200,000 ounces per year over the next decade at an estimated capital cost of $109 million. Funding for the project will be through operating cash flow and existing cash balances.

Fortuna plans to advance the Séguéla expansion through a phased execution plan designed to minimize disruption to ongoing operations.

Key milestones include:

Show more of the filing

• H2 2026: Expected commencement of construction activities, including site preparation, camp expansion, procurement of long-lead items, and advancement of EPCM activities.

• Q2 2027: Expected commencement of underground mining at the Sunbird deposit.

• H2 2028: Targeted ramp-up to the expanded processing plant throughput of approximately 2.3 Mtpa.

HIGHLIGHTS FOR THE THREE MONTHS ENDED JUNE 30, 2026

Financial

• Sales were $318.4 million, an increase of 38% from the $230.4 million reported in the three months ended June 30, 2025 (“Q2 2025”)

Fortuna | 4

Page 5

• Mine operating income was $183.5 million, an increase of 75% from the $105.0 million reported in Q2 2025

• Operating income was $156.9 million, an increase of $73.2 million from the $83.7 million in operating income reported in Q2 2025

• Attributable net income from continuing operations was $75.5 million or $0.25 per share, an increase from attributable net income of $42.6 million or $0.14 per share reported in Q2 2025

• Adjusted attributable net income (refer to Non-IFRS Financial Measures) was $75.5 million compared to $44.7 million in Q2 2025, representing a 69% increase

• Adjusted EBITDA (refer to Non-IFRS Financial Measures) was $200.8 million compared to $133.3 million reported in Q2 2025, representing a 51% increase

• Free cash flow from ongoing operations (refer to Non-IFRS Financial Measures) was $85.7 million compared to $57.4 million reported in Q2 2025, representing a 49% increase

• Net cash provided by operating activities from continuing operations was $138.3 million, an increase of 49% from the $92.7 million reported in Q2 2025

Operating

• Gold production of 62,512 ounces, a 1% increase from Q2 2025

• Silver production of 231,294 ounces, a 4% decrease from Q2 2025

• Lead production of 7,815,387 pounds, a 12% decrease from Q2 2025

• Zinc production of 12,037,240 pounds, a 6% decrease from Q2 2025

• Consolidated All-in Sustaining Costs (“AISC”) of $2,157 per ounce on a gold equivalent sold basis compared to $1,932 per ounce for Q2 2025. See “Non-IFRS Measures - All-in Sustaining Cash Cost per Ounce of Gold Equivalent Sold” for additional information

Health & Safety

With deep regret, we reported a fatal accident involving an employee of one of our mining contractors in May at the Séguéla Mine. The accident involved a haul truck. Following the accident, a comprehensive investigation was completed and resulting learnings have been incorporated into the Company’s ongoing safety and operational controls.

The Company recorded one lost time injury, one restricted work injury, and one medical treatment injury over 3.2 million hours worked during the period. As a result, the year-to-date lost time injury frequency rate (“LTIFR”) at the end of the quarter was 0.17 per million hours worked, compared to 0.00 in Q2 2025. The total recordable injury frequency rate (“TRIFR”) was 1.21 per million hours worked, compared to 0.87 in Q2 2025.

Environment

During the second quarter of 2026, there were no serious environmental incidents, no incidents of non-compliance related to water permits, standards, and regulations and no material environmental fines recorded.

Community Engagement

During the second quarter of 2026, there were no material disputes with communities at any of our sites. The Company recorded 517 local stakeholder engagement activities during the period, including consultation meetings with local administration and community leaders, participation in ceremonies and courtesy visits.

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Operating and Financial Highlights From Continuing Operations

A summary of the Company’s consolidated financial and operating results for the three and six months ended June 30, 2026 and 2025 is presented below:

Consolidated MetricsThree months ended June 30, 2026Three months ended June 30, 2025Three months ended June 30, % ChangeSix months ended June 30, 2026Six months ended June 30, 2025Six months ended June 30, % Change
Selected highlights
Gold
Metal produced (oz)62,51261,7361%126,073120,5565%
Metal sold (oz)62,45361,6311%125,876118,7256%
Realized price ($/oz)4,4473,30734%4,6673,10350%
Silver
Metal produced (oz)231,294240,621(4%)488,897483,6141%
Metal sold (oz)285,916251,79814%489,349503,607(3%)
Realized price ($/oz)75.2233.77123%78.3232.77139%
Lead
Metal produced (000's lbs)7,8158,924(12%)15,99017,760(10%)
Metal sold (000's lbs)9,7149,1836%16,75318,382(9%)
Zinc
Metal produced (000's lbs)12,03712,851(6%)23,56326,623(11%)
Metal sold (000's lbs)12,70712,2833%23,72426,109(9%)
Unit costs
Cash cost ($/oz Au Eq)(1)(2)1,03492911%99389910%
All-in sustaining cash cost ($/oz Au Eq)(1)(2)2,1571,93212%2,1341,84616%
Mine operating income183.5105.075%395.3185.4113%
Operating income156.983.787%337.0139.7141%
Net income from continuing operations83.747.776%203.786.6135%
Attributable net income from continuing operations75.542.677%186.578.1139%
Attributable income from continuing operations per share - basic0.250.1479%0.620.25148%
Attributable net income75.537.3102%186.595.895%
Attributable income per share - basic0.250.12108%0.620.31100%
Adjusted attributable net income from continuing operations(1)75.544.769%186.580.4132%
Adjusted EBITDA(1)200.8133.351%419.6235.878%
Net cash provided by operating activities - continuing operations138.392.749%347.6181.791%
Free cash flow from ongoing operations(1)85.757.449%259.7124.1109%
Capital Expenditures(3)
Sustaining36.631.417%64.554.019%
Sustaining leases8.96.048%15.710.944%
Growth capital31.315.6101%48.731.057%
(in millions of US dollars, except percentages)June 30, 2026December 31, 2025% Change
Cash and cash equivalents606.7554.010%
Total assets2,497.32,360.66%

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Debt138.9134.43%
Equity attributable to Fortuna shareholders1,767.01,677.05%

(1) Refer to Non-IFRS financial measures.

(2) Gold equivalent was calculated using the realized prices for gold of $4,447/oz Au, $75.22/oz Ag, $1,930/t Pb and $3,464/t Zn for Q2 2026. Gold equivalent was calculated using the realized prices for gold of $3,307/oz Au, $33.8/oz Ag, $1,945/t Pb and $2,640/t Zn for Q2 2025. Gold equivalent was calculated using the realized prices for gold of $4,667/oz Au, $78.32/oz Ag, $1,925/t Pb and $3,363/t Zn for YTD 2026. Gold equivalent was calculated using the realized prices for gold of $3,103/oz Au, $32.8/oz Ag, $1,958/t Pb and $2,747/t Zn for YTD 2025.

(3) Capital expenditures are presented on a cash basis.

Figures may not add due to rounding.

Discontinued operations have been removed where applicable.

FINANCIAL RESULTS FROM CONTINUING OPERATIONS

Sales

(in millions of US dollars, except percentages)Three months ended June 30, 2026Three months ended June 30, 2025Three months ended June 30, % ChangeSix months ended June 30, 2026Six months ended June 30, 2025Six months ended June 30, % Change
Provisional sales
Lindero90.375.719%191.8128.949%
Séguéla185.7126.547%392.0237.565%
Caylloma44.828.458%78.959.233%
Adjustments(1)(2.4)(0.2)1,100%(1.8)(0.1)1,700%
Total sales318.4230.438%660.9425.555%

(1) Adjustments consist of mark to market, final price and assay adjustments.

Based on provisional sales before final price adjustments. Net after payable metal deductions, treatment, and refining charges.

Treatment charges are allocated to base metals at Caylloma.

Discontinued operations have been removed.

Second Quarter 2026 vs Second Quarter 2025

Consolidated sales from continuing operations for the three months ended June 30, 2026 were $318.4 million, a 38% increase from the $230.4 million reported in the same period in 2025. Sales by reportable segment for the three months ended June 30, 2026 were as follows:

• Lindero recognized sales of $90.3 million from the sale of 20,404 ounces of gold, a 19% increase from the comparable period in 2025. Sales increased at Lindero as a result of higher realized metal prices of $4,422 per gold ounce compared to $3,293. Higher metal prices were partially offset by lower production due to a maintenance shutdown of the primary crusher and work completed on the agglomerator. See "Results of Operations – Lindero Mine, Argentina" for additional information.

• Séguéla recognized sales of $185.7 million from the sale of 41,677 ounces of gold, an increase of 47% over the comparable period. Higher sales at Séguéla were the result of higher production from higher grades as well as a realized metal price of $4,456 per gold ounce compared to $3,315 in the comparable period. See "Results of Operations – Séguéla Mine, Côte d’Ivoire" for additional information.

• Caylloma recognized sales of $44.8 million compared to $28.4 million reported in the same period in 2025. Increased sales were driven by higher realized silver prices of $75.33 per ounce compared to $33.76 per ounce in the comparable period. See "Results of Operations – Caylloma Mine, Peru" for additional information.

First Six Months of 2026 vs First Six Months of 2025

Consolidated sales from continuing operations for the six months ended June 30, 2026 were $660.9 million, a 55% increase from the $425.5 million reported in the same period in 2025. Sales by reportable segment for the six months ended June 30, 2026 were as follows:

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• Lindero recognized sales of $191.8 million from the sale of 41,587 ounces of gold, a 49% increase from the comparable period in 2025. Sales increased at Lindero as a result of higher realized metal prices of $4,633 per gold ounce compared to $3,108. See "Results of Operations – Lindero Mine, Argentina" for additional information.

• Séguéla recognized sales of $392.0 million from the sale of 83,731 ounces of gold, an increase of 65% over the comparable period. Higher sales at Séguéla were the result of higher production from higher grades as well as higher realized metal prices of $4,682 per gold ounce compared to $3,101 in the comparable period. See "Results of Operations – Séguéla Mine, Côte d’Ivoire" for additional information.

• Caylloma recognized sales of $78.9 million compared to $59.2 million reported in the same period in 2025. Increased sales were driven by higher realized silver prices of $78.40 per ounce compared to $32.76 per ounce in the comparable period. The increase was partially offset by lower base metal production. See "Results of Operations – Caylloma Mine, Peru" for additional information.

Operating Income (Loss) and Adjusted EBITDA

Three months ended June 30, 2026Three months ended June 30, % (1)Three months ended June 30, 2025Three months ended June 30, % (1)Six months ended June 30, 2026Six months ended June 30, % (1)Six months ended June 30, 2025Six months ended June 30, % (1)
Operating income (loss)
Lindero36.540%29.138%92.048%46.536%
Séguéla115.762%62.049%235.660%106.545%
Caylloma19.746%8.731%37.549%19.233%
Corporate(15.0)(16.1)(28.1)(32.5)
Total156.949%83.736%337.051%139.733%
Adjusted EBITDA (2)
Lindero51.457%38.751%121.964%67.452%
Séguéla139.875%91.773%284.573%166.870%
Caylloma24.457%13.247%45.759%28.247%
Corporate(14.8)(10.3)(32.5)(26.6)
Total200.863%133.358%419.663%235.855%

(1) As a percentage of sales.

(2) Refer to Non-IFRS Financial Measures.

Figures may not add due to rounding.

Discontinued operations have been removed.

Second Quarter 2026 vs Second Quarter 2025

Operating income for the three months ended June 30, 2026 was $156.9 million, an increase of $73.2 million over the same period in 2025 which was primarily due to:

• Higher operating income at the Lindero Mine was primarily the result of higher sales and partially offset by increased operating costs due to maintenance and rehandling costs as well as higher Argentine Peso denominated costs due to macroeconomic factors and rising diesel prices. Depletion per ounce also increased due to an impairment reversal on mineral properties in the third quarter of 2025.

• The Séguéla Mine recognized operating income of $115.7 million in the second quarter compared to $62.0 million in the comparable period. The increase in operating income was a result of higher sales and lower depletion per ounce due to an increase in reserves partially offset by higher royalties. Operating income for the second quarter of 2026 included $11.5 million in depletion related to the purchase price of Roxgold Inc. in 2021.

• Operating income at the Caylloma Mine for the second quarter of 2026 increased by $11.0 million compared to 2025 as a result of higher silver sales.

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After adjusting for items that are not indicative of future operating earnings, adjusted EBITDA (refer to Non-IFRS Financial Measures) was $200.8 million for the three months ended June 30, 2026, an increase of $67.5 million over the same period in 2025. Higher adjusted EBITDA was primarily the result of higher sales.

The most comparable IFRS measure to the Non-IFRS measure adjusted EBITDA is net income from continuing operations. Net income from continuing operations for the three months ended June 30, 2026 was $83.7 million, a $39.6 million increase from the $44.1 million reported in the comparable period. Refer to the discussion above and to the section entitled “Non-IFRS Measures” for more detailed information.

First Six Months of 2026 vs First Six Months of 2025

Operating income for the six months ended June 30, 2026 was $337.0 million, an increase of $197.3 million over the same period in 2025 which was primarily due to the same factors described above.

After adjusting for items that are not indicative of future operating earnings, adjusted EBITDA (refer to Non-IFRS Financial Measures) was $419.6 million for the six months ended June 30, 2026, an increase of $183.8 million over the same period in 2025. Higher adjusted EBITDA was primarily the result of higher sales

The most comparable IFRS measure to the Non-IFRS measure adjusted EBITDA is net income from continuing operations for the six months ended June 30, 2026 was $203.7 million, a $94.8 million increase from the $108.9 million reported in the comparable period. Refer to the discussion above and to the section entitled “Non-IFRS Measures” for more detailed information.

All-in Sustaining Cost (“AISC”)

Second Quarter 2026 vs Second Quarter 2025

Consolidated AISC per gold equivalent ounce (“GEO”) sold from continuing operations for the second quarter of 2026 was $2,157 compared to $1,932 for the comparable quarter. Factors that contributed to higher AISC for the period were:

• A $105/oz increase in cash costs mainly due to maintenance shutdowns at Lindero, real appreciation of the Peso increasing USD operating costs, and rising diesel prices

• A $74/oz increase from royalties as a result of higher realized metal prices

• ($48)/oz from lower G&A primarily due to lower share-based compensation

• $94/oz for higher sustaining capital due to capitalized stripping at Séguéla and project work at Caylloma

First Six Months of 2026 vs First Six Months of 2025

Consolidated AISC per gold equivalent ounce (“GEO”) sold from continuing operations for the first six months of 2026 was $2,134 compared to $1,846 for the comparable period. Factors that contributed to higher AISC for the period were:

• A $94/oz increase due to higher cash costs

• A $93/oz increase from royalties as a result of higher realized metal prices

• $90/oz for higher sustaining capital due to capitalized stripping at Séguéla and project work at Caylloma

• The comparable period included a ($10)/oz benefit related to the gain on blue chip swaps in Argentina

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General and Administrative (“G&A”) Expenses

(in millions of US dollars except percentages)Three months ended June 30, 2026Three months ended June 30, 2025Three months ended June 30, % ChangeSix months ended June 30, 2026Six months ended June 30, 2025Six months ended June 30, % Change
Mine G&A9.37.819%18.015.119%
Corporate G&A9.59.23%20.416.623%
Share-based payments(0.3)4.5(107)%7.513.7(45)%
Workers' participation0.20.1100%0.60.1500%
Total18.721.6(14)%46.545.52%

G&A expenses for the three months ended June 30, 2026 decreased 14% to $18.7 million compared to $21.6 million reported in the same period in 2025. The decrease was a result of lower share-based compensation caused by a decline in the Company’s share price and the resulting change in value of share units expected to settle in cash.

For the six months ended June 30, 2026, the G&A expenses increased 2% to $46.5 million compared to $45.5 million reported in the same period in 2025 with lower share-based compensation offsetting higher G&A costs due to timing of spend.

Foreign Exchange

Foreign exchange loss for the three months ended June 30, 2026 was $6.3 million compared to a $2.3 million gain reported in the same period in 2025. The higher foreign exchange loss in the quarter was due to the purchase of US dollars in Argentina to repatriate funds and a devaluation of the Peso and the impact on cash and VAT balances.

Foreign exchange loss for the six months ended June 30, 2026 was $8.4 million compared to a $2.5 million gain reported in the same period in 2025. The higher foreign exchange loss in the period was due to the purchase of US dollars in Argentina to repatriate funds and a devaluation of the foreign currencies relative to the US Dollar and the impact on cash and VAT balances held locally.

Income Tax Expense

Income tax expense for the three months ended June 30, 2026 was $71.0 million compared to $33.7 million reported in the same period in 2025. The $37.3 million increase in income tax expense was due to higher net income before taxes, the devaluation of the Peso and the impact on tax balances in local currency in Argentina as well as the accrual of $14.9 million in withholding taxes primarily for planned repatriation of cash from subsidiaries.

Income tax expense for the six months ended June 30, 2026 was $129.4 million compared to $49.0 million reported in the same period in 2025. The $80.4 million increase in income tax expense was due to higher net income before taxes as well as the accrual of $27.2 million in withholding taxes for planned repatriation of cash from subsidiaries.

The effective tax rate (“ETR”) for the three months ended June 30, 2026 was 46% compared to 41% for the same period in 2025. The increase in the ETR for Q2 2026 was primarily due to a higher deferred tax expense as a result of the accrual of withholding taxes and the impact of macro-economic factors on tax balances in Argentina.

The effective tax rate (“ETR”) for the six months ended June 30, 2026 was 39% compared to 36% for the same period in 2025. The increase in the ETR for 2026 was due to the same factors described above.

The Company is subject to tax in various jurisdictions, including Peru, Mexico, Argentina, Côte d’Ivoire, Senegal, Australia, and Canada. There are a number of factors that can significantly impact the Company’s ETR including the geographic distribution of income, variations in our income before income taxes, varying rates in different jurisdictions, the non-

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recognition of tax assets, local inflation rates, fluctuation in the value of the United States dollar and foreign currencies, changes in tax laws, and the impact of specific transactions and assessments. As a result of the number of factors that can potentially impact the ETR and the sensitivity of the tax provision to these factors, the ETR will fluctuate, sometimes significantly. This trend is expected to continue in future periods.

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RESULTS OF OPERATIONS

Lindero Mine, Argentina

The Lindero Mine is an open pit gold mine located in Salta Province in northern Argentina. Its commercial product is gold doré. The table below shows the key metrics used to measure the operating performance of the mine: tonnes placed on the leach pad, grade, production, and unit costs:

Three months ended June 30, 2026Six months ended June 30, 2025Six months ended June 30, 20262025
Mine production
Tonnes placed on the leach pad1,558,7501,828,5203,084,0363,581,536
Gold
Grade (g/t)0.640.570.630.56
Production (oz)20,82923,55042,37443,870
Metal sold (oz)20,40423,48741,58742,142
Realized price ($/oz)4,4223,2934,6333,108
Unit costs
Cash cost ($/oz Au)(1)1,4591,1481,3311,147
All-in sustaining cash cost ($/oz Au)(1)2,2651,7832,0191,839
Capital expenditures ($000's)(2)
Sustaining12,05311,35619,72223,718
Sustaining leases1,2317912,6281,373
Growth capital4,0831,8274,7982,134

(1) Cash cost and All-in sustaining cash cost are non-IFRS financial measures.

Refer to Non-IFRS Financial Measures.

(2) Capital expenditures are presented on a cash basis.

Quarterly Operating and Financial Highlights

In the second quarter of 2026, a total of 1,558,750 tonnes of ore were placed on the heap leach pad, with an average gold grade of 0.64 g/t, containing an estimated 32,008 ounces of gold. Ore mined was 1.38 million tonnes, with a stripping ratio of 1.81:1. During the first half of 2026, Lindero placed on the leach pad approximately 95% of the ounces planned for the period required to achieve the midpoint of its annual production guidance.

Lindero’s gold production for the quarter was 20,829 ounces compared to 23,550 ounces in the comparable period. Lower production was due to Lindero completing key capital projects aimed at improving comminution reliability and availability, which required a planned 30-day shutdown of the primary crusher to replace its steel foundations.

The cash cost per ounce of gold for the quarter was $1,459 compared to $1,148 in the same period of 2025. The increase in cash costs was primarily driven by lower gold production and higher maintenance costs associated with the 30-day shutdown of the primary crusher as well as real appreciation of the Argentine Peso increasing costs in US dollar terms and rising diesel prices.

In the second quarter of 2026, AISC per gold ounce sold increased to $2,265 compared to $1,783 in the comparable period of 2025. The increase in AISC was due to lower payable ounces sold and higher production cash costs.

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Séguéla Mine, Côte d’Ivoire

Showing pages 1–12 of 39. 6ix is still reading pages 21–39.

Attached document

Contents
  1. NEWS RELEASE · page 1
  2. Fortuna reports third quarter 2026 production of 69,665 gold equivalent ounces and advances key growth initiatives · page 1
  3. Q3 2026 highlights · page 1
  4. Growth initiatives · page 1
  5. Safety · page 1
  6. Q3 and 9-month 2026 consolidated GEO production · page 1
  7. West Africa Region · page 2
  8. Mining · page 2
  9. Processing · page 2
  10. Year-to-date production · page 2
  11. Project Updates · page 3
  12. 30% Plant Expansion · page 3
  13. Sunbird Underground Project · page 3
  14. Exploration Activities · page 3
  15. Diamba Sud Gold Project, Senegal: Drilling commences at the Bambadji property · page 3
  16. Latin America region · page 4
  17. Mining · page 4
  18. Processing · page 4
  19. Year-to-date production · page 4
  20. Exploration activities · page 4
  21. Mining · page 5
  22. Processing · page 5
  23. Year-to-date production · page 5
  24. Project update · page 5
  25. Qualified Person · page 6
  26. About Fortuna Mining Corp. · page 6
  27. ON BEHALF OF THE BOARD · page 6
  28. Jorge A. Ganoza · page 6
  29. Investor Relations: · page 6
  30. Forward-looking Statements · page 7
  31. Cautionary Note to United States Investors Concerning Mineral Resources and Mineral Reserves · page 8

Page 1

NEWS RELEASE

Fortuna reports third quarter 2026 production of 69,665 gold equivalent ounces and advances key growth initiatives

Vancouver, British Columbia, October 7, 2026: Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) reports production results for the third quarter and first nine months of 2026 from its three operating mines in West Africa and Latin America. This release also provides updates on key growth initiatives, safety performance, and other activities across the Company’s portfolio. Unless otherwise indicated, all monetary amounts are expressed in U.S. dollars.

Q3 2026 highlights

Production

• Production totaled 69,665 gold equivalent ounces (“GEO”)1 in the third quarter of 2026, compared with 72,217 GEO in Q2 20262,3 and 72,462 GEO in Q3 20254,5. Production for the first nine months of 2026 totaled 214,754 GEO, and the Company remains on track to achieve its annual production guidance of 281,000 to 305,000 GEO6.

Growth initiatives

• Approved a 30% expansion of the Séguéla processing plant, supporting annual gold production growth to target over 200,000 ounces from H2 2028.

• Significantly expanded our Diamba Sud Gold Project concession holdings with the acquisition of the immediately adjacent 190 km2 Bambadji Project, consolidating ~60 kilometers of prospective strike along the gold prolific Senegal-Mali Shear Zone.

Safety

• The Total Recordable Injury Frequency Rate (TRIFR) was 1.20 per million hours worked in Q3 2026, compared to 1.21 in Q2 20267.

Q3 and 9-month 2026 consolidated GEO production

GEO Production
Q3 2026Q2 20269-Month 20262026 Annual Guidance 6
Séguéla, Côte d'Ivoire33,74441,683117,443160,000 - 170,000
Lindero, Argentina26,02420,82968,39892,000 - 102,000
Caylloma, Peru9,8979,70528,91329,000 - 33,000
Total69,66572,217214,754281,000 - 305,000

Notes:

1. Gold equivalent ounces (“GEO”) include gold, silver, lead, and zinc and are calculated using the following metal prices: $4,281/oz Au, $62.70/oz Ag, $1,871/t Pb, and $3,832/t Zn, or Au:Ag = 1:68.27, Au:Pb = 1:2.29, Au:Zn = 1:1.12

2. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”

3. GEO includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,446/oz Au, $75.21/oz Ag, $1,930/t Pb and $3,464/t Zn, or Au:Ag = 1:59.11, Au:Pb = 1:2.30, Au:Zn = 1:1.28.

4. Refer to Fortuna news release dated October 8, 2025, “Fortuna delivers production of 72,462 gold equivalent ounces for the third quarter of 2025.”

5. GEO includes gold, silver, lead, and zinc and is calculated using the following metal prices: $3,467/oz Au, $39.35/oz Ag, $1,962/t Pb and $2,815/t Zn, or Au:Ag = 1:88.10, Au:Pb = 1:1.77, Au:Zn = 1:1.23.

6. Refer to Fortuna news release dated January 15, 2026, “Fortuna Achieves 2025 Production Guidance, Delivering 317,001 GEO, and Issues 2026 Outlook.”

7. Refer to Fortuna “Management´s Discussion and Analysis for the three and six months ended June 30, 2026”

Page 2

West Africa Region

Séguéla Mine, Côte d’Ivoire: 30% plant expansion approved; annual gold production to target over 200,000 ounces from H2 2028

Notes:

1. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”

2. Production includes doré only

Mining

During the third quarter of 2026, Séguéla mined 340,714 tonnes of ore at an average grade of 2.69 g/t Au from the Antenna, Ancien, Sunbird, and Koula pits, containing an estimated 29,516 ounces of gold. This compared with 433,231 tonnes of ore mined at an average grade of 3.06 g/t Au in the second quarter of 2026, containing an estimated 42,555 ounces of gold. Waste mined during the quarter totaled 6.5 million tonnes, resulting in a strip ratio of 19.1:1. At the Sunbird South pit, a further 623,390 tonnes of waste were excavated to advance access to the planned portal location for the Sunbird underground mine.

Third quarter mining performance and gold production were affected by reduced equipment availability at one of the Company’s mining contractors and a temporary site-wide stoppage caused by a blockade by artisanal miners operating in the surrounding area. The blockade was lifted following intervention by a government law enforcement agency, and normal operations resumed. These disruptions reduced mining volumes and delayed access to higher-grade ore. Corrective measures were implemented with the mining contractor, and mining volumes returned to planned levels in September.

Processing

Séguéla produced 33,744 ounces of gold in the third quarter of 2026, compared with 41,683 ounces in the second quarter, reflecting lower tonnes milled, head grade, and recovery. The plant processed 402,440 tonnes at an average head grade of 2.67 g/t Au and at a recovery rate of 90.75%.

Gold production is expected to recover to first-half 2026 levels in the fourth quarter as mining volumes normalize and access to higher-grade ore improves. The 1.35% quarter-over-quarter decrease in plant recovery was attributed to localized metallurgical characteristics of the Koula ore.

Year-to-date production

Séguéla produced 117,443 ounces of gold in the first nine months of 2026 and remains on track to achieve the lower end of its annual production guidance.

Page 3

Project Updates

30% Plant Expansion

During the third quarter, the Board approved a $109 million budget for a 30% expansion of the Séguéla processing plant. The expansion will increase annual throughput to 2.3 million tonnes, restore gold recoveries to the original design rate of 94%, and support annual gold production target of over 200,000 ounces from the second half of 2028.

Detailed engineering is underway with Lycopodium, the EPCM contractor. The owner’s project team is 75% onboarded, and vendors have been selected for key equipment and infrastructure packages. Project completion and commissioning are scheduled for the third quarter of 2028.

Sunbird Underground Project

The Sunbird Underground Project, which is expected to begin supplying mill feed to the expanded plant in 2028, continued to advance during the quarter. The Environmental and Social Impact Assessment (“ESIA”) has been approved, with final permitting expected in the fourth quarter of 2026.

The underground project team has been recruited and is advancing pre-development and operational readiness activities. Major mining equipment has been ordered for delivery in line with the project schedule, and portal construction and development are expected to commence in the second quarter of 2027.

The underground mine design supports expected steady-state production of approximately 1 million tonnes per annum, equivalent to 40% of the expanded plant throughput.

The Sunbird underground deposit remains open at depth, with additional drilling planned from future underground platforms to test its growth potential.

Exploration Activities

Exploration during the quarter focused on converting Inferred Mineral Resources at the Sunbird Underground and Kingfisher deposits and on step-out drilling beyond the boundaries of the current Inferred Resources.

During the fourth quarter of 2026 and into 2027, drilling will focus on other priority targets, including the underground potential at Ancien, southern and depth extensions to the Antenna pit, and emerging prospects across the Séguéla property.

Diamba Sud Gold Project, Senegal: Drilling commences at the Bambadji property

During the third quarter of 2026, Fortuna acquired the 190 km2 Bambadji advanced gold exploration project, immediately adjacent to Diamba Sud. The acquisition consolidates approximately 60 kilometers of prospective strike along the Senegal-Mali Shear Zone, where exploration has commenced with six drill rigs.

Diamba Sud continues to advance toward a final investment decision in the fourth quarter as the Company completes the final stages of negotiations for the tax stability agreement with the State of Senegal. First gold pour remains on track for the second quarter of 2028.

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Latin America region

Lindero Mine, Argentina: Gold production increases 25% quarter-over-quarter; on track to meet annual guidance

Notes:

1. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”

2. Production includes doré, gold-in-carbon, and gold in copper concentrate.

Mining

During the third quarter of 2026, Lindero mined 2.3 million tonnes of ore at a strip ratio of 0.85:1 and stacked 1.9 million tonnes on the leach pad at an average grade of 0.63 g/t, containing an estimated 37,746 ounces of gold. Gold ounces placed on the leach pad increased by 18% compared with the second quarter, driven by improved mechanical availability across the processing circuit and higher crushing and stacking rates.

During the first nine months of 2026, Lindero placed approximately 99% of the planned gold ounces for the period on the leach pad.

Processing

Lindero produced 26,024 ounces of gold in the third quarter of 2026, a 25% increase from the second quarter and consistent with the second-half operating plan.

Year-to-date production

Lindero produced 68,398 ounces of gold in the first nine months of 2026 and remains on track to achieve its annual production guidance.

Exploration activities

Drilling to test extensions of mineralization beneath the ultimate Mineral Reserve pit shell at Lindero was completed as planned during the quarter. Assay results have been reported from the commercial laboratory and will be evaluated to determine the potential for future resource growth.

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Caylloma Mine, Peru: On track to exceed annual production guidance; tailings storage expansion 64% complete

Notes:

1. Refer to Fortuna news release dated July 9, 2026, “Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives.”

2. Metallurgical recovery for silver is calculated based on silver content in lead concentrate.

3. GEO production includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,281/oz Au, $62.70/oz Ag, $1,871/t Pb and $3,832/t Zn, or Au:Ag = 1:68.27, Au:Pb = 1:2.29, Au:Zn = 1:1.12.

4. GEO production includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,446/oz Au, $75.21/oz Ag, $1,930/t Pb and $3,464/t Zn, or Au:Ag = 1:59.11, Au:Pb = 1:2.30, Au:Zn = 1:1.28.

Mining

Caylloma mined 139,868 tonnes of ore in the third quarter of 2026, in line with the mine plan. Plant throughput of 140,832 tonnes was broadly consistent with the second quarter, with the difference between tonnes mined and processed reflecting the use of ore stockpile.

Processing

During the third quarter, Caylloma produced 247,367 ounces of silver, a 7% increase from the second quarter, supported by a higher average head grade of 66 g/t and improved recovery. Zinc and lead production totaled 11.4 million pounds and 8.4 million pounds, respectively, at average head grades of 4.08% zinc and 2.98% lead.

The quarter's performance reflects steady plant operations, consistent throughput, and continued strong contribution from base metal production.

Year-to-date production

Caylloma produced 9,897 GEO in the third quarter and 28,913 GEO during the first nine months of 2026, close to the lower end of its annual guidance range of 29,000 to 33,000 GEO and positioning the operation to exceed its annual guidance by year-end.

Project update

As of September 30, 2026, the expansion of the tailings storage facility No. 3 was approximately 64% complete and on schedule for completion by year-end. The expansion is expected to provide the additional tailings storage capacity required to support operations for several more years.

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Qualified Person

Eric Chapman, Senior Vice President of Technical Services for Fortuna Mining Corp., is a Professional Geoscientist registered with Engineers and Geoscientists British Columbia (Registration No. 36328), and a Qualified Person as defined by National Instrument 43-101- Standards of Disclosure for Mineral Projects. Mr. Chapman has reviewed and approved the scientific and technical information contained in this news release and has verified the underlying data.

About Fortuna Mining Corp.

Fortuna Mining Corp. is a Canadian precious metals mining company with three operating mines, the feasibility-stage Diamba Sud Gold Project in Senegal, and a portfolio of exploration projects in Argentina, Côte d’Ivoire, Guinea, Guyana, and Peru. Sustainability is at the core of our operations and stakeholder relationships. We produce gold and silver while creating long-term shared value through efficient production, environmental stewardship, and social responsibility. For more information, please visit our website at www.fortunamining.com

ON BEHALF OF THE BOARD

Jorge A. Ganoza

CEO and Director Fortuna Mining Corp.

Investor Relations:

Carlos Baca | info@fmcmail.com | fortunamining.com | X | LinkedIn | YouTube | Instagram | TikTok

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Forward-looking Statements

This news release contains forward-looking statements which constitute “forward-looking information” within the meaning of applicable Canadian securities legislation and “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995 (collectively, “Forward-looking Statements”). All statements included herein, other than statements of historical fact, are Forward-looking Statements and are subject to a variety of known and unknown risks and uncertainties which could cause actual events or results to differ materially from those reflected in the Forward-looking Statements. The Forward-looking Statements in this news release include, without limitation, statements about the Company’s plans for its mines and mineral properties; statements reiterating the Company’s 2026 annual production guidance and the likelihood of the Company meeting such annual production guidance, including that the Caylloma Mine is on track to exceed annual gold production guidance; statements relating to the planned underground project at the Séguéla Mine and the anticipated timing for final permitting and commencement of portal construction and development and for supplying mill feed to the expanded plant; statements regarding the processing plant expansion at Séguéla, including the estimated resulting increase in tonnes milled, improvement in recoveries, annual gold production growth, and anticipated project completion and commissioning timeline; expectations that gold production at Séguéla will recover to first-half 2026 levels in the fourth quarter; statements regarding the Company’s brownfields and greenfields exploration activities; statements regarding the development of the Diamba Sud gold project, including advancement towards a final investment decision and first gold pour; statements regarding the project to increase tailings storage facility at the Caylloma Mine, including the expected completion timeline; the Company’s business strategy, plans and outlook; the merit of the Company’s mines and mineral properties; the future financial or operating performance of the Company; the Company’s ability to comply with contractual and permitting or other regulatory requirements; approvals and other matters. Often, but not always, these Forward-looking Statements can be identified by the use of words such as “estimated,” “potential,” “open,” “future,” “assumed,” “projected,” “used,” “detailed,” “has been,” “gain,” “planned,” “reflecting,” “will,” “anticipated,” “estimated,” “containing,” “remaining,” “to be,” or statements that events, “could” or “should” occur or be achieved and similar expressions, including negative variations.

Forward-looking Statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance, or achievements of the Company to be materially different from any results, performance or achievements expressed or implied by the Forward-looking Statements. Such uncertainties and factors include, among others, operational risks associated with mining and mineral processing; uncertainty relating to Mineral Resource and Mineral Reserve estimates; uncertainty relating to capital and operating costs, production schedules and economic returns; risks relating to the Company’s ability to replace its Mineral Reserves; risks associated with mineral exploration and project development; uncertainty relating to the repatriation of funds as a result of currency controls; environmental matters including obtaining or renewing environmental permits and potential liability claims; uncertainty relating to nature and climate conditions; laws and regulations regarding the protection of the environment (including greenhouse gas emission reduction and other decarbonization requirements and the uncertainty surrounding the interpretation of omnibus Bill C-59 and the related amendments to the Competition Act (Canada); risks associated with political instability and changes to the regulations governing the Company’s business operations; changes in national and local government legislation, taxation, controls, regulations and political or economic developments in countries in which the Company does or may carry on business; risks associated with war, hostilities or other conflicts, such as the Ukrainian – Russian, Israel- – Hamas, and Iran – Israel and United States conflicts, and the impacts such conflicts may have on global economic activity; risks relating to the termination of the Company’s mining concessions in certain circumstances; developing and maintaining relationships with local communities and stakeholders; risks associated with losing control of public perception as a result of social media and other web-based applications; potential

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opposition to the Company’s exploration, development and operational activities; risks related to the Company’s ability to obtain adequate financing for planned exploration and development activities; property title matters; risks relating to the integration of businesses and assets acquired by the Company; impairments; risks associated with climate change legislation; reliance on key personnel; adequacy of insurance coverage; operational safety and security risks; legal proceedings and potential legal proceedings; uncertainties relating to general economic conditions; risks relating to a global pandemic, which could impact the Company’s business, operations, financial condition and share price; competition; fluctuations in metal prices; risks associated with entering into commodity forward and option contracts for base metals production; fluctuations in currency exchange rates and interest rates; tax audits and reassessments; risks related to hedging; uncertainty relating to concentrate treatment charges and transportation costs; sufficiency of monies allotted by the Company for land reclamation; risks associated with dependence upon information technology systems, which are subject to disruption, damage, failure and risks with implementation and integration; labor relations issues; as well as those factors discussed under “Risk Factors” in the Company's Annual Information Form. Although the Company has attempted to identify important factors that could cause actual actions, events, or results to differ materially from those described in Forward-looking Statements, there may be other factors that cause actions, events, or results to differ from those anticipated, estimated or intended.

Forward-looking Statements contained herein are based on the assumptions, beliefs, expectations and opinions of management, including but not limited to the accuracy of the Company’s current Mineral Resource and Mineral Reserve estimates; that the Company’s activities will be conducted in accordance with the Company’s public statements and stated goals; that there will be no material adverse change affecting the Company, its properties or its production estimates (which assume accuracy of projected head grade, mining rates, recovery timing, and recovery rate estimates and may be impacted by unscheduled maintenance, labor and contractor availability and other operating or technical difficulties); the duration and effect of global and local inflation; geo-political uncertainties on the Company’s production, workforce, business, operations and financial condition; the expected trends in mineral prices, inflation and currency exchange rates; that all required approvals and permits will be obtained for the Company’s business and operations on acceptable terms including for the construction of a mine at the Diamba Sud Project and the underground mining method at the Séguéla Mine; that there will be no significant disruptions affecting the Company’s operations and such other assumptions as set out herein. Forward-looking Statements are made as of the date hereof and the Company disclaims any obligation to update any Forward-looking Statements, whether as a result of new information, future events, or results or otherwise, except as required by law. There can be no assurance that these Forward-looking Statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on Forward-looking Statements.

Cautionary Note to United States Investors Concerning Mineral Resources and Mineral Reserves

Technical disclosure regarding the Company’s properties included herein has been prepared in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects (“NI 43- 101”) and the Canadian Institute of Mining, Metallurgy, and Petroleum Definition Standards on Mineral Resources and Mineral Reserves. Canadian standards, including NI 43-101, differ from the requirements of the Securities and Exchange Commission, and information included herein may not be comparable to similar information disclosed by U.S. companies.

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