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Fortuna Awards the Séguéla Mine Plant Expansion Study, Côte d’Ivoire

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Fortuna (NYSE: FSM) awarded Lycopodium Minerals Canada Ltd. to conduct a Séguéla processing plant expansion options study in Côte d’Ivoire.

Key disclosed facts: reserve life extended to 7.5 years; completion of an underground mining study to support potential conversion of 3.6 Mt at 4.34 g/t containing 502,000 oz of Sunbird indicated resources to reserves is expected in December 2025; the plant study will assess increasing throughput from 1.75 Mtpa to 2.0–2.5 Mtpa (a 15–40% increase) targeting >200,000 oz gold/year; study start immediate with completion targeted in Q2 2026.

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Positive

  • Reserve life extended to 7.5 years
  • Potential conversion of 3.6 Mt at 4.34 g/t containing 502,000 oz
  • Targeting processing throughput increase to 2.0–2.5 Mtpa (15–40%)
  • Plant study targets >200,000 oz gold per year
  • Study completion targeted in Q2 2026, advancing growth planning

Negative

  • No final expansion decision or capital commitment during study phase (completion targeted Q2 2026)

News Market Reaction

-1.85%
1 alert
-1.85% News Effect

On the day this news was published, FSM declined 1.85%, reflecting a mild negative market reaction.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

Reserve life of mine: 7.5 years Sunbird resource tonnage: 3.6 Mt Sunbird grade: 4.34 g/t +5 more
8 metrics
Reserve life of mine 7.5 years Séguéla Mine reserve life as recently reported
Sunbird resource tonnage 3.6 Mt Potential underground conversion of Sunbird Indicated Mineral Resources
Sunbird grade 4.34 g/t Average grade for 3.6 Mt Sunbird Indicated Mineral Resources
Sunbird contained gold 502,000 oz Gold contained in Sunbird Indicated Mineral Resources targeted for conversion
Current plant capacity 1.75 Mtpa Existing Séguéla processing plant throughput
Target plant capacity 2.0–2.5 Mtpa Expansion study range, a 15–40% throughput increase
Gold output target >200,000 oz/year Séguéla production target after potential plant expansion
Group production objective 500,000 oz/year Gold equivalent production objective within the next three years

Market Reality Check

Price: $11.57 Vol: Volume 10,976,378 is 1.58...
high vol
$11.57 Last Close
Volume Volume 10,976,378 is 1.58x the 20-day average of 6,967,440, indicating elevated trading interest ahead of this update. high
Technical Price at 9.78 is trading above the 200-day MA of 7.09, reflecting a pre-existing uptrend into this growth announcement.

Peers on Argus

Gold peers showed mixed moves with some up (e.g., EGO +4.78%, SSRM +4.48%, NG +2...

Gold peers showed mixed moves with some up (e.g., EGO +4.78%, SSRM +4.48%, NG +2.11%) and others down (SAND -5.16%, BTG -0.64%), suggesting FSM’s setup was more stock-specific than a uniform sector trend.

Historical Context

5 past events · Latest: Dec 08 (Positive)
Pattern 5 events
Date Event Sentiment Move Catalyst
Dec 08 Drill results & PEA Positive -0.4% Strong Diamba Sud drill results and robust PEA economics highlighted project potential.
Dec 03 Plant expansion study Positive -1.9% Award of Séguéla plant expansion study targeting higher throughput and gold output.
Nov 26 Technical report filing Positive +3.7% Filing of NI 43-101 technical report formalizing Diamba Sud PEA disclosure.
Nov 18 Reserve/resource update Positive +0.8% Séguéla reserve and resource growth with extended life of mine and expansion plans.
Nov 05 Q3 2025 earnings Positive +0.5% Q3 results with strong cash generation, liquidity, and Diamba Sud PEA progress.
Pattern Detected

Recent news skewed positive (growth, reserves, project economics). Price reactions were mostly positive but two exploration/growth updates saw mild negative divergence, indicating occasional profit-taking on good news.

Recent Company History

Over the last month, Fortuna reported several growth-focused updates. On Nov 5, Q3 2025 results highlighted strong cash generation and liquidity. On Nov 18, Séguéla reserves and resources increased, extending life of mine to 7.5 years. A formal NI 43-101 technical report for Diamba Sud followed on Nov 26. Subsequent Séguéla expansion and Diamba Sud drilling/PEA news emphasized higher production and project advancement, with share price reactions generally modest relative to the strategically positive tone.

Market Pulse Summary

This announcement outlines a plant expansion study aiming to raise Séguéla throughput from 1.75 Mtpa...
Analysis

This announcement outlines a plant expansion study aiming to raise Séguéla throughput from 1.75 Mtpa to 2.0–2.5 Mtpa, targeting more than 200,000 oz of gold per year and building on a 7.5-year reserve life. It also links to potential underground conversion of 502,000 oz at Sunbird and a broader goal of roughly 500,000 oz annual gold-equivalent production. Investors may watch study timelines, capital estimates, and subsequent reserve updates to gauge progress.

Key Terms

mineral reserves, mineral resources, indicated mineral resources, metallurgical performance, +2 more
6 terms
mineral reserves technical
"Fortuna Expands Mineral Reserves and Mineral Resources for the Séguéla Mine"
Mineral reserves are the amounts of a metal or mineral that a company has identified and can legally and economically extract with current technology. Think of it like the usable fuel in a car’s tank rather than all the oil in the ground; reserves determine how long a mine can produce, help estimate future revenue and costs, and shape a company’s value and investment risk.
mineral resources technical
"Mineral Reserves and Mineral Resources for the Séguéla Mine, Côte d’Ivoire."
Mineral resources are naturally occurring concentrations of metals or other valuable materials in the earth that could be mined and sold, like pockets of useful ingredients inside a giant pantry. For investors they show the raw-material potential behind a mining project: bigger or higher-quality resources can mean more future revenue, while the cost, technical difficulty and regulatory hurdles determine how much of that value can actually be realized.
indicated mineral resources technical
"Sunbird Indicated Mineral Resources into Mineral Reserves"
Indicated mineral resources are quantities and qualities of a mineral deposit estimated with a reasonable level of confidence based on spaced sampling and analysis, sitting between a rough guess and a high-certainty measurement. For investors, they matter because they support preliminary economic studies and mine planning—think of them as a reasonably reliable shopping list for a recipe, useful for deciding whether to invest further but not yet proof that profitable extraction is guaranteed.
metallurgical performance technical
"while optimizing metallurgical performance to unlock its full production potential"
Metallurgical performance describes how well a metal or metal-containing material behaves during processing and in its final use — for example, how easily it can be melted, shaped, purified, or how strong, resistant to wear, and durable the final product is. For investors, it matters because better metallurgical performance typically means lower production costs, fewer defects, higher product value and more reliable supply, which can boost profitability and reduce operational risk; think of it as the difference between a recipe that yields consistent, high-quality bread and one that wastes ingredients and time.
qualified person regulatory
"and a Qualified Person as defined by National Instrument 43-101"
A qualified person is someone with specialized knowledge, experience, and training in a particular field, allowing them to accurately assess and verify information or work. Their expertise helps ensure that reports, evaluations, or decisions are trustworthy and meet required standards. For investors, a qualified person provides confidence that the information they rely on is credible and properly validated.
national instrument 43-101 regulatory
"as defined by National Instrument 43-101- Standards of Disclosure for Mineral Projects"
National Instrument 43-101 is a set of rules and guidelines that govern how mineral exploration and mining companies must report information about their projects. It ensures that the details shared with investors are accurate, consistent, and reliable—similar to how a detailed, verified blueprint ensures a building’s safety. This helps investors make informed decisions based on trustworthy information about a company's mineral resources.

AI-generated analysis. Not financial advice.

VANCOUVER, British Columbia, Dec. 03, 2025 (GLOBE NEWSWIRE) -- Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) is pleased to announce that Lycopodium Minerals Canada Ltd. has been selected to undertake Séguéla’s Processing Plant Expansion Options Study (the “Study”), supporting Fortuna´s next phase of growth in Côte d’Ivoire.

Key Highlights

  • The Company recently reported:
  • Assessment of expansion options aimed at increasing processing plant throughput by 15 to 40 percent.
  • Completion of the plant expansion feasibility study planned for the second quarter of 2026.

Jorge A. Ganoza, President and CEO, commented, “Initiating the Séguéla plant expansion study is a key step in unlocking the next phase of growth for the mine and fully capturing the opportunities created by our exploration success.” Mr. Ganoza continued, “Awarding the study to Lycopodium reflects our confidence in their deep understanding of Séguéla and their ability to deliver practical, innovative solutions.” Mr. Ganoza concluded, “Together with continued progress at our Diamba Sud Gold Project in Senegal, this work advances Fortuna toward our objective of achieving approximately 500,000 ounces of annual gold equivalent production within the next three years.”

Processing Plant Expansion Options Study
The Study will evaluate practical and cost-effective solutions to increase Séguéla’s processing plant throughput beyond its current 1.75 Mtpa capacity to between 2.0 and 2.5 Mtpa, while optimizing metallurgical performance to unlock its full production potential, targeting more than 200,000 ounces of gold per year. This growth initiative supports Fortuna’s strategic objective to maximize value from the Séguéla Mine and to accommodate resource growth, including the potential future inclusion of underground mineralization from the Sunbird deposit into the mine plan.

Lycopodium brings unparalleled expertise to this project, having designed, built, and commissioned Séguéla’s processing plant. Their proven execution track record in West African gold projects and their robust technical approach ensure a comprehensive assessment of expansion scenarios, including capital and operating cost estimates, risk analysis, and implementation planning.

The Study is scheduled to commence immediately, with completion targeted within the second quarter of 2026. Fortuna looks forward to working closely with Lycopodium to advance this important organic growth initiative.

Qualified Person
Raul Espinoza, Director of Technical Services, is a Fellow of the Australasian Institute of Mining and Metallurgy and is registered as a Chartered Professional in Mining - FAusIMM (CP) with Membership Registration # 309581 and a Qualified Person as defined by National Instrument 43-101- Standards of Disclosure for Mineral Projects. Mr. Espinoza 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 and a portfolio of exploration projects in Argentina, Côte d'Ivoire, Mexico, and Peru, as well as the Diamba Sud Gold Project in Senegal. 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
President, CEO, and Director
Fortuna Mining Corp.

Investor Relations:
Carlos Baca | info@fmcmail.com | fortunamining.com | X | LinkedIn | YouTube

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 may include, without limitation, the Company’s expectations regarding the expansion of processing plant capacity and a potential increase in annual gold production at Séguéla; statements regarding projected resource growth, including the potential future inclusion of underground mineralization for the Sunbird deposit into the mine plan; the Company’s expectations regarding its estimated annual gold equivalent production growth objective; the expected timeline for completion of the Study; the life of mine estimate for the Séguéla Mine; statements regarding the potential conversion of Indicated Mineral Resources into Mineral Reserves at Sunbird and the expected timing thereof; Mineral Resource and Mineral Reserve estimates; the Company’s proposed exploration plans and objectives; statements about the Company’s business strategies, plans and outlook; the Company’s plans for its mines and mineral properties; changes in general economic conditions and financial markets; the impact of inflationary pressures on the Company’s business and operations; the future results of exploration activities; expectations with respect to metal grade estimates and the impact of any variations relative to metals grades experienced; assumed and future metal prices; the merit of the Company’s mines and mineral properties; and the future financial or operating performance of the Company. Often, but not always, these Forward-looking Statements can be identified by the use of words such as “estimated”, “potential”, “open”, “future”, “assumed”, “projected”, “proposed”, “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 related to the conversion of Mineral Resources to 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, and Israeli – Hamas conflicts, and the impacts they 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 related to the ability to retain or extend title to the Company’s mineral properties; 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 for the fiscal year ended December 31, 2024. 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 ore 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; the duration and impacts of 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; 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.

PDF available: http://ml.globenewswire.com/Resource/Download/0360fb26-7158-4438-bb97-72f2513e9a4c


FAQ

What will Fortuna (FSM) study for the Séguéla processing plant and when will it finish?

Lycopodium will evaluate expansion options to raise throughput from 1.75 Mtpa to 2.0–2.5 Mtpa; the study is underway with completion targeted in Q2 2026.

How much additional gold production does Fortuna expect from the Séguéla plant expansion (FSM)?

The study targets unlocking >200,000 ounces of gold per year at elevated throughput levels.

What reserve and resource updates did Fortuna report for Séguéla (FSM) on Dec 3, 2025?

Fortuna reported a reserve life of 7.5 years and expects potential conversion of 3.6 Mt at 4.34 g/t containing 502,000 oz from Sunbird resources by December 2025.

Who is conducting the Séguéla plant expansion study for Fortuna (FSM) and why was it selected?

Lycopodium Minerals Canada Ltd. was selected based on prior design, construction, and commissioning experience at Séguéla and West African gold projects.

Does the Séguéla expansion study mean Fortuna (FSM) has approved construction or spending?

No; the announcement states the study will assess options and cost estimates, with no final construction decision or capital commitment reported.
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