Fortuna delivers robust  PEA for Diamba Sud Gold Project in Senegal: After-tax IRR of 72% and  NPV5% of US$563 million using US$2,750 per ounce 
  globenewswire.com
  October 15, 2025 07:58 ET                                 | Source:                                Fortuna Mining Corp.
   (All financial information contained herein are expressed in US dollars unless otherwise stated)
    VANCOUVER, British Columbia, Oct.  15, 2025  (GLOBE NEWSWIRE) -- Fortuna Mining Corp. (NYSE: FSM | TSX: FVI)  is pleased to report the results of the Preliminary Economic Assessment  (PEA) prepared for the Diamba Sud Gold Project in Senegal.
    The  PEA supports robust project economics for the development of an  open-pit mine and conventional carbon-in-leach (CIL) processing plant.  At a gold price of $2,750 per ounce, the assessment unveils an after-tax  NPV5% of $563 million, an IRR of 72 percent, and a payback  period of ten months. During the first three years of production, Diamba  Sud is projected to deliver an average of 147,000 ounces of gold per  year at an All-In Sustaining Cost1 (AISC) of $904 per ounce.
    Construction  capital cost is estimated at approximately $283.2 million. Project  funding is derisked by the strength of Fortuna’s balance sheet and  robust cash flow generation. As of the end of the second quarter of  2025, Fortuna reported liquidity of $537.3 million and a net cash  position of $214.8 million.
    Jorge A. Ganoza,  President and CEO at Fortuna, commented, “The PEA highlights the strong  value Diamba Sud brings to Fortuna’s portfolio, using a long-term gold  price of $2,750 per ounce. With permitting and the Definitive  Feasibility Study underway, we expect to make a construction decision in  the first half of 2026.” Mr. Ganoza continued, “Ongoing exploration is  advancing with five drill rigs focused on expanding open areas of  mineralization and to upgrade the small portion of Inferred Mineral  Resources to the Measured and Indicated categories by year-end. With  continued exploration success, we expect to enhance Diamba Sud’s life of  mine production profile beyond a decade.” Mr. Ganoza concluded,  “Additionally, we have approved a $17 million budget to advance early  construction works, including the expansion of camp and ancillary  facilities, as well as detailed engineering activities.”
    Note:
    - This  is a non-GAAP financial measure. The definition and purpose of this  non-GAAP financial measure is included under the heading “Cautionary  Note on Non-GAAP Measures” in this news release. 
 
     PEA Key Highlights
    Table 1 summarizes the key assumptions, operational parameters, economic results, and AISC values from the PEA.
    Table 1: PEA key highlights
   
 
 | Metrics | Units |   | Results
  |   |  | Gold price | $/oz |   | 2,750 |   |  | Life of mine | year |   | 8.1 |   |  | Total mineralized material mined1 | Mt |   | 17.75 |   |  | Contained gold in mined resource1 | koz |   | 932 |   |  | Strip ratio | w:o |   | 5.5:1 |   |  | Throughput initial 3 years (oxide) | Mtpa |   | 2.5 |   |  | Throughput @ nameplate (fresh) | Mtpa |   | 2.0 |   |  | Head grade | g/t Au |   | 1.63 |   |  | Recoveries | % |   | 90% |   |  | Gold production |   |   |  | Total Production over LOM | koz |   | 840 |   |  | Average annual production, LOM | koz |   | 106 |   |  | Average annual production, first 3 years | koz |   | 147 |   |  | Per unit costs over LOM |   |   |  | Total mining costs | $/t, mined | $4.82 |   |  | Processing | $/t, processed | $13.91 |   |  | G&A | $/t, processed | $6.70 |   |  | Cash costs1 |   |   |  | Average operating cash costs2, LOM | $/oz | $1,081 |   |  | Average operating cash costs2, first 3 years | $/oz | $759 |   |  | AISC1 |   |   |  | Average AISC2, LOM | $/oz | $1,238 |   |  | Average AISC2, first 3 years | $/oz | $904 |   |  | Capital costs |   |   |  | Initial capital expenditure | $ M | $283 |   |  | Sustaining capital, operations + Infrastructure (includes closure costs) | $ M | $48 |   |  | NPV5%, pre-tax (100% project basis) | $M | $772 |   |  | Pre-tax IRR | % |   | 86% |   |  | NPV5%, after-tax (100% project basis) | $M | $563 |   |  | After-tax IRR | % |   | 72% |   |  | Payback period | year |   | 0.8 |   |  | Annual EBITDA 2 |   |   |  | Average EBITDA2 over LOM | $ M | $167 |   |  | Average EBITDA2 over first 3 years | $ M | $277 |   |  
 
    Notes:
    - The pit optimization shells used for the mining inventory were generated using a gold price of $2,300 per ounce.
 - This  is a non-GAAP financial measure. The definition and purpose of this  non-GAAP financial measure is included under the heading “Cautionary  Note on Non-GAAP Measures” in this news release. Non-GAAP financial  measures have no standardized meaning under IFRS and therefore, may not  be comparable to similar measures presented by other issuers.
 - Average operating cash costs and average AISC represent costs for projected production for the LOM at the time of gold sales.
 - The  PEA is presented on a 100 percent project basis. However, upon the  granting of the exploitation permit, the Senegalese Government will be  entitled to a 10 percent free-carried interest in the Project, with the  right for the State to acquire an additional contributory interest of up  to 25 percent.
 - The economic  analysis was carried out using a discounted cash flow approach on a  pre-tax and after-tax basis, based on the gold price of $2,750/oz.
 - The IRR on total investment that is presented in the economic analysis was calculated assuming a 100% ownership in Diamba Sud.
 - The  NPV was calculated from the after-tax cash flow generated by the  Project, based on a discounted rate of 5% and an effective date of  October 10, 2025.
 - The PEA assumes  that the percentage of certain royalties and taxes payable to the State,  the percentage of the investment tax credit available to the company  and the percentage payable to the social development fund will be in  accordance with the provisions of the Mining Convention between Boya  S.A. and the State of Senegal dated April 8, 2015. There can be no  assurance that such provisions will not be renegotiated by the State as  part of the exploitation permit approval process.
 - The  PEA is preliminary in nature, and it includes inferred mineral  resources that are considered too speculative geologically to have the  economic considerations applied to them that would enable them to be  categorized as mineral reserves, and, as such, there is no certainty  that the PEA results will be realized.
 
     Exploration Upside: Resource Delineation and Exploration Drilling
    Opportunities  exist to further strengthen and enhance Diamba Sud’s economic  foundation through continued drilling, resource extension testing, and  definition of new targets. Successful exploration programs are expected  to extend the Life of Mine (LOM) gold production profile to beyond a  decade.
    Exploration drilling completed since the  data cut-off for the Mineral Resource estimate in the PEA comprises 125  drill holes totaling 15,794 meters. Results from this recent drilling  include drill hole DSDD488 that intersected 22.7 g/t Au over an  estimated true width of 21.6 meters, highlighting substantial  exploration upside (refer to Fortuna news release dated August 13, 2025:  “ Fortuna drills 22.7 g/t gold over 21.6 meters at Southern Arc, Diamba Sud Gold Project, Senegal”).
    Exploration programs for the second half of 2025 are focused on:
    - Infill  drilling at Area A, Area D, Karakara, Moungoundi, and Southern Arc to  convert Inferred Resources to Indicated Resources in support of the  forthcoming Definitive Feasibility Study (DFS) and Mineral Reserve  estimate.
 - Step-out  and resource expansion drilling at Southern Arc aimed at increasing the  Mineral Resource and enhancing the LOM gold-production profile from  year four onward.
 - Testing prospective targets identified across the broader Diamba Sud tenement package, which offer additional growth potential.
 - Continuing  exploration at Fortuna’s Bondala properties, adjacent to Diamba Sud,  where geophysical surveys and auger drilling have identified anomalies  to be followed up with targeted drill programs.
    Diamba Sud PEA Overview
    The  PEA outlines the design of an open pit gold mining operation targeting a  series of deposits including Area A, Area D, Karakara, Western Splay,  Kassassoko, Moungoundi, and Southern Arc which will feed a central gold  processing facility over the current 8.1-year LOM. The assessment is  based on Diamba Sud´s Mineral Resource estimate, which comprises an  Indicated Mineral Resource of 14.2 million tonnes (Mt) at an average  gold grade of 1.59 grams per tonne (g/t), containing 724,000 ounces of  gold, and an Inferred Mineral Resource of 6.2 Mt at an average grade of  1.44 g/t gold, containing 285,000 ounces of gold, reported as of July 7,  2025 (refer to Fortuna news release dated August 5, 2025, “ Fortuna Advances Diamba Sud Gold Project in Senegal with Updated Mineral Resources; PEA Completion Targeted for Q4 2025”).
    Mining and Processing
    The  PEA and mine plan outline the design of an open pit gold mining  operation feeding a central gold processing facility over the 8.1-year  LOM. The assessment anticipates the concurrent development of multiple  deposits, including Area A, Area D, Karakara, Western Splay, Kassassoko,  Moungoundi, and Southern Arc, with no more than three pits mined at any  one time (refer to Figure 1).
    The production  strategy targets an initial throughput of 2.5 million tonnes per annum  (Mtpa) during the first three years of operation, supported by the high  oxide content at Area D, before transitioning to a sustained rate of 2.0  Mtpa from year four onward as the feed becomes predominantly fresh  material.
    Exploration drilling completed at the  Southern Arc deposit subsequent to the Mineral Resource estimate in the  PEA has intersected near-surface mineralization to the south and east of  the currently defined pit limits. It is anticipated that these results  will be incorporated in future evaluations to enhance gold production in  the later years of the LOM.
    The pit  optimization shells used to define the mining inventory were generated  using a gold price of $2,300 per ounce and a revenue factor of 1.0.  Optimization parameters incorporated government royalties, refining,  mining, processing, and general and administrative costs to ensure  realistic pit designs and economic assumptions.
    
  
    Figure 1: Diamba  Sud PEA Production Profile: Annual gold production profile over the  projected LOM, highlighting the contribution from individual deposits  and the transition from oxide to fresh material.
    Mining  activities at Diamba Sud will employ conventional open pit methods.  Drilling and blasting are planned for both oxide and fresh mineralized  material, followed by conventional truck-and-shovel operations for the  movement of potentially mineralized material and waste within the pits.
    The  Diamba Sud process plant design is based on a metallurgical flowsheet  developed to produce gold doré at optimum recovery while minimizing  initial capital and operating costs. The flowsheet comprises  conventional crushing, milling (single-stage semi-autogenous grinding  mill in closed circuit with cyclones), gravity recovery, carbon-in-leach  processing, carbon elution, and gold recovery.
    A summary of the key operating and production statistics from the PEA is presented in Table 2.
    Table 2: Diamba Sud LOM Mining and Processing Plan Metrics
   
 
 |   | Unit | Year -1 | Year 0 | Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | Year 6 | Year 7 | Year 8 | LOM |  | Area A |   |   |   |   |   |   |   |   |   |   |   |   |  | Potentially mineralized material mined | kt |   |   |   |   | 9 | 122 | 923 | 2,044 |   |   | 3,098 |  | Au grade | g/t |   |   |   |   | 1.17 | 0.97 | 1.84 | 1.45 |   |   | 1.54 |  | Area D |   |   |   |   |   |   |   |   |   |   |   |   |  | Potentially mineralized material mined | kt |   | 69 | 1,870 | 1,718 | 1,666 |   |   |   |   |   | 5,323 |  | Au grade | g/t |   | 0.87 | 2.51 | 1.33 | 1.41 |   |   |   |   |   | 1.76 |  | Karakara |   |   |   |   |   |   |   |   |   |   |   |   |  | Potentially mineralized material mined | kt |   | 21 | 974 | 1,745 |   |   |   |   |   |   | 2,741 |  | Au grade | g/t |   | 1.97 | 1.87 | 1.83 |   |   |   |   |   |   | 1.84 |  | Kassassoko |   |   |   |   |   |   |   |   |   |   |   |   |  | Potentially mineralized material mined | kt |   | - |   |   |   |   |   | 30 | 1,099 |   | 1,130 |  | Au grade | g/t |   | - |   |   |   |   |   | 1.04 | 0.97 |   | 0.97 |  | Moungoundi |   |   |   |   |   |   |   |   |   |   |   | 34.3 |  | Potentially mineralized material mined | kt |   |   |   |   |   |   |   |   | 499 | 296 | 795 |  | Au grade | g/t |   |   |   |   |   |   |   |   | 0.95 | 1.28 | 1.07 |  | Southern Arc |   |   |   |   |   |   |   |   |   |   |   | 15.2 |  | Potentially mineralized material mined | kt |   |   |   |   | 0 | 1,532 | 1,008 | 299 | 264 |   | 3,103 |  | Au grade | g/t |   |   |   |   | 0.47 | 1.58 | 1.68 | 1.65 | 1.98 |   | 1.65 |  | Western Splay |   |   |   |   |   |   |   |   |   |   |   | 16.8 |  | Potentially mineralized material mined | kt |   |   |   | 121 | 1,172 | 270 |   |   |   |   | 1,564 |  | Au grade | g/t |   |   |   | 1.12 | 1.45 | 3.22 |   |   |   |   | 1.73 |  | Total |   |   |   |   |   |   |   |   |   |   |   |   |  | Potentially mineralized material mined | kt |   | 90 | 2,845 | 3,585 | 2,847 | 1,925 | 1,931 | 2,373 | 1,862 | 296 | 17,754 |  | Au grade | g/t |   | 1.13 | 2.29 | 1.56 | 1.43 | 1.77 | 1.76 | 1.47 | 1.11 | 1.28 | 1.63 |  | Contained gold | koz |   | 3.3 | 209.4 | 180.3 | 130.5 | 109.6 | 109.0 | 111.9 | 66.3 | 12.2 | 932.4 |  | Waste mined | kt |   | 2,322 | 16,326 | 15,588 | 16,380 | 17,166 | 13,793 | 7,264 | 7,597 | 656 | 97,092 |  | Total mined | kt |   | 2,412 | 19,171 | 19,173 | 19,228 | 19,091 | 15,723 | 9,637 | 9,459 | 953 | 114,846 |  | Stockpile |   |   |   |   |   |   |   |   |   |   |   |   |  | Start of period | kt |   |   | 90 | 580 | 1,665 | 2,013 | 1,712 | 1,532 | 1,875 | 1,524 | n/a |  | Grade | g/t |   |   | 1.13 | 0.76 | 0.57 | 0.59 | 0.68 | 0.59 | 0.59 | 0.58 | n/a |  | Processing |   |   |   |   |   |   |   |   |   |   |   |   |  | Material milled | kt |   |   | 2,354 | 2,500 | 2,500 | 2,225 | 2,111 | 2,030 | 2,213 | 1,821 | 17,754 |  | Head grade | g/t |   |   | 2.62 | 2.04 | 1.53 | 1.55 | 1.72 | 1.62 | 1.03 | 0.70 | 1.63 |  | Contained gold | koz |   |   | 198.5 | 163.8 | 122.7 | 110.8 | 117.0 | 105.7 | 73.2 | 40.7 | 932.4 |  | Recovery | % |   |   | 92.5 | 92.1 | 86.1 | 88.2 | 90.0 | 91.9 | 87.9 | 86.6 | 90.1 |  | Gold production | koz |   |   | 183.7 | 150.9 | 105.6 | 97.7 | 105.3 | 97.2 | 64.3 | 35.3 | 840 |  
 
    Tailings, Water and Power
    The  tailings management system will comprise a tailings pipeline and a  water return pipeline housed within a geomembrane-lined trench, with  associated tailings pumps. The Tailings Storage Facility (TSF) will be  fully lined with a geomembrane and will be developed as a side-valley  storage facility formed by robust, multi-zoned earth-fill embankments.  It is designed to accommodate 17.8 Mt of tailings and will be  constructed using the downstream methodology, in accordance with  industry best practices and the Global Industry Standard on Tailings  Management (GISTM).
    A water storage dam will  serve as the main collection and storage facility for clean, raw, and  process water. Raw water is currently assumed to be supplied via a  pipeline from the Falémé River, supplemented by pit dewatering  activities. Ongoing studies are evaluating the potential to develop a  water harvesting facility as an alternative source. Process water from  the TSF will be recycled back to the plant, with site operations  designed as a closed-circuit system to maximize water reuse and minimize  environmental impacts on surrounding communities.
    Power  for Diamba Sud is expected to be self-supplied through an on-site power  plant. The current plan envisages a heavy fuel oil power plant  constructed in an N+1 configuration, supported by light fuel oil  generators to meet site-wide demand. In parallel, a hybrid solar  photovoltaic system is being evaluated as part of the preparation of the  DFS.
    Capital Costs Summary
    The  PEA estimates the total initial capital required to develop Diamba Sud  to be $283.2 million, including $4.0 million in capitalized closure  costs to be deposited into escrow and a $46.4 million contingency.  Sustaining capital is estimated at an additional $40.0 million, directly  related to mining operations, processing, and infrastructure sustaining  capital, along with a further $8.0 million in closure costs over the  8.1-year LOM.
    Mining pre-production capital  includes all mining activities required prior to commissioning of the  processing facility. A total of 2.3 Mt of waste and 90 kt of potentially  mineralized material will be mined to establish a stockpile ahead of  processing operations. All contractor mobilization and setup costs are  included in the pre-production capital allowance.
    The  processing plant capital estimate relates to a facility with a  nameplate throughput of 2.0 Mtpa, designed to accommodate up to 2.5  Mtpa. The capital cost estimate is based on an Engineering, Procurement,  Construction, and Management (EPCM) implementation approach.
    A  summary of estimated capital costs is presented in Table 3, and the  estimated annual sustaining capital costs are set out in Table 4.
    Table 3: Summary of Initial Development Capital Costs
   | Capital Costs | Value ($ M) |  | Construction costs | $191.7 |  | Pre-production costs (excluding mining) | $21.6 |  | Mining pre-stripping | $19 |  | Contingency | $46.4 |  | Withholding taxes, duties, levies | $4.5 |  | Total | $283.2 |     Table 4: Estimated Annual Sustaining Capital Costs
   
 
 Year
  | Units
  | Year | Year | Year | Year | Year | Year | Year | Year | Year | Year | Total
  |  | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |  | TSF lifts | $ M | 4.5 | - | 7.3 | - | 11.7 | - | 11.1 | - |   |   | 34.6 |  | Roads | $ M | - | 2.1 | 0.2 | - | - | 0.1 | 0.3 | - |   |   | 2.7 |  | Surface water management | $ M | - | 1.0 | 0.9 | - | - | - | 0.3 | - |   |   | 2.3 |  | Closure | $ M | - | - | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 5.3 |   |   | 8.5 |  | Total | $ M | 4.5 | 3.1 | 9.1 | 0.6 | 12.3 | 0.7 | 12.4 | 5.3 |   |   | 48.0 |  
 
    Operating Costs Summary
    The PEA estimates direct operating costs of $51.16 per tonne of material milled or $1,081 per ounce of gold produced, and AISC1 of $1,238 per ounce over the LOM, as summarized in Table 5.
    Table 5: LOM AISC1
   
 
 |   | $M | $/t milled | $/payable oz |  | Operating cost |   |   |   |  | Mining | 542 | 30.54 | 646 |  | Processing | 247 | 13.91 | 294 |  | G&A | 119 | 6.70 | 142 |  | Subtotal, direct operating costs | 908 | 51.16 | 1,081 |  | Refining | 3 | 0.14 | 3 |  | Royalties2 | 69 | 3.90 | 83 |  | Social Development Fund2 | 12 | 0.65 | 14 |  | Total Operating Costs | 992 | 55.85 | 1,180 |  | Sustaining Capital, and Reclamation |   |   |   |  | Sustaining Capital | 40 | 2.23 | 47 |  | Closure | 8 | 0.48 | 10 |  | All-in Sustaining Cost1 | 1,040 | 58.56 | 1,238 |  
 
   Notes:
    - AISC  and cash costs per payable ounce of gold sold are non-GAAP financial  measures; refer to “Cautionary Note on Non-GAAP Measures”
 - The PEA assumes a 3% royalty payable to the State and 0.5% contribution to a Social Development Fund
    Financial Analysis
  Diamba  Sud has been evaluated on a discounted cash flow basis and the results  of the PEA demonstrate that it is potentially economically robust. The  base case, using a gold price of $2,750 per ounce, generates an  after-tax NPV at a 5 percent discount rate of $563 million, an IRR of 72  percent, and a payback period of approximately ten months. Figure 2  illustrates the estimated cash flow profile of Diamba Sud over the LOM.
    
  
    Figure 2: Diamba Sud Cash Flow Profile
    Sensitivity Analysis: Strong economic performance across a range of key variables
    Diamba  Sud´s NPV and IRR are most sensitive to changes in revenue parameters,  including gold price, head grade, and process plant recovery. NPV and  IRR are more sensitive to variations in operating costs than to capital  costs. 
    Estimated NPV sensitivities for key operating and economic metrics are presented in Figure 3.
    
  
    Figure 3: After-tax NPV5% Sensitivities
    The  sensitivity of Diamba Sud’s NPV to changes in the applied discount rate  and gold price is presented in Table 5; base case highlighted.
    Table 5: Gold Price and Discount Rate Sensitivities on Post-tax NPV ($ M)
   
 
 |   | Gold Price ($/oz) |  | $2,000 | $2,250 | $2,500 | $2,750 | $3,000 | $3,250 | $3,500 | $3,750 |  Discount Rate (%)
  | 3.0 | $230 | $362 | $494 | $622 | $750 | $878 | $1,007 | $1,134 |  | 5.0 | $200 | $322 | $444 | $563 | $682 | $800 | $919 | $1,037 |  | 7.0 | $173 | $287 | $400 | $511 | $621 | $731 | $841 | $951 |  
 
    The sensitivity of Diamba Sud’s IRR to changes in the key operating parameters is illustrated in Figure 4.
    
  
    Figure 4: Diamba Sud Post-Tax IRR sensitivities
    Environmental and Permitting
    On  October 6, 2025, Fortuna filed an Environmental and Social Impact  Assessment (ESIA) with the Direction de la Réglementation  Environnementale et du Contrôle (DiREC), a division of the Ministry of  the Environment and Sustainable Development of Senegal (refer to Fortuna  news release dated October 7, 2025, “ Fortuna  Files Environmental and Social Impact Assessment for the Diamba Sud  Gold Project in Senegal and provides update on Preliminary Economic  Assessment status”). The filing of the ESIA marks an important milestone in the permitting process.
    Fortuna  expects to apply and receive an exploitation permit for Diamba Sud  before the expiry of its exploration permit in June 2026.
    Next Steps: Definitive Feasibility Study and Early Works
    Fortuna  has approved a supplementary budget of $17 million to de-risk Diamba  Sud’s development schedule by advancing early work planning and  permitting in parallel with early works construction activities to  establish site access and a new accommodation camp. In addition, subject  to Board approval, front-end engineering and design is scheduled to  commence this quarter, followed by the procurement of long-lead items in  the second quarter of 2026 to ensure readiness for project execution.
    The  DFS is expected to be completed towards the end of the second quarter  of 2026, leading to an anticipated construction decision shortly  thereafter. A positive construction decision would position Diamba Sud  to begin full construction in the fourth quarter of 2026, following the  wet season, with first gold pour targeted for the second quarter of  2028.
    The projected timeline for development and key milestones is illustrated in Figure 5.
    
  
    Figure 5: Diamba Sud Projected Development Timeline and Key Milestones
    Technical Report
    A  technical report supporting the results of the PEA will be prepared in  accordance with National Instrument 43-101, Standards of Disclosure for  Mineral Projects and filed on SEDAR+ at  www.sedarplus.com and on EDGAR at  www.sec.gov/edgar under  Fortuna Mining’s profile within 45 days of the date of this news  release. The technical report will also be available on the Company’s  website at  www.fortunamining.com.
    Further  information regarding the PEA referenced in this news release,  including details on data verification, key assumptions, parameters,  opportunities, risks, and other factors, will be contained in the  technical report.
    The PEA is preliminary in  nature, and it includes inferred mineral resources that are considered  too speculative geologically to have the economic considerations applied  to them that would enable them to be categorized as mineral reserves,  and, as such, there is no certainty that the PEA results will be  realized.
    Qualified Person
    Raul  Espinoza, Director of Technical Services for the Company, is a Fellow  member and Chartered Professional of the Australasian Institute of  Mining and Metallurgy (FAusIMM CP) 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 pertaining to the Project 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@fmcmining.com |  fortunamining.com |  X |  LinkedIn |  YouTube
    Cautionary Note Regarding 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. Forward-looking statements contained in  this news release include, without limitation, statements with respect  to: the calculation of mineral resources at the Project and the  possibility of eventual economic extraction of minerals from the  Project; the identification of future mineral resources at the Project;  the Company’s ability to convert existing mineral resources into  categories of mineral resources or mineral reserves of increased  geological confidence; the projected yearly gold production profile from  both open pit and underground operations, all-in sustaining costs, mill  throughput and average grades; future plans for exploration drilling;  the projected economics of the project, including total gold sales,  margins, taxes, average annual production, the net present value of the  Project, the internal rate of return on the Project, project payback  period, average yearly free cash flow, life of mine unit costs,  projected mine life, the total initial capital and sustaining capital  required; the project design, including the location of the tailings  management facility, process plant, water storage dam, infrastructure  area, stockpile areas, camp; and the proposed open pit mine plans; the  plans for completing the early works program; the project development  timeline to production including the Company’s work relating to its  environmental impact assessment statement and obtaining the permit, the  permitting of future phases of the Project, the timing of the completion  of future studies including a feasibility study, obtaining an  exploitation permit for the Project, other permitting approvals, and the  development and construction of and production at the Project,  including the constructing of a series of open pit mines; the timing of  and future prospects for exploration and any expansion of the Project,  including upside associated with the Project and the Company’s adjacent  permits; the potential for expanding the initial mineral resource and  the potential for identifying additional mineralization in areas of  intercepts and conceptual areas for extension and expansion; potential  recovery rates or processing techniques.
    These  statements are based on information currently available to the Company  and the Company provides no assurance that actual results will meet  management's expectations. In certain cases, forward-looking information  may be identified by such terms as "anticipates", "believes", "could",  "estimates", "expects", "may", "shall", "will", or "would".  Forward-looking information contained in this news release is based on  certain factors and assumptions regarding, among other things, the PEA,  the estimation of Mineral Resources, the realization of resource  estimates and mining inventory, any potential upgrades of existing  resource estimates, gold metal prices, the timing and amount of future  exploration and development expenditures, the estimation of initial and  sustaining capital requirements, the estimation of labour and operating  costs, the availability of necessary financing and materials to continue  to explore and develop the Company’s properties in the short and  long-term, the progress of exploration and development activities, the  receipt of necessary regulatory approvals, and assumptions with respect  to currency fluctuations, environmental risks, title disputes or claims,  and other similar matters. The Company also notes that, under  Senegalese mining legislation, the Government is entitled to a 10%  free-carried interest and may elect to purchase up to an additional 25%  interest in the project at a “fair price” determined through an  independent valuation upon the granting of the exploitation permit.  While the Company considers these assumptions to be reasonable based on  information currently available to it, they may prove to be incorrect.
    Although  the Company believes the expectations expressed in such forward-looking  statements are based on reasonable assumptions, such statements are not  guarantees of future performance and actual results or developments may  differ materially from those in the forward-looking statements. Factors  that could cause actual results to differ materially from those in  forward-looking statements include: changes in market conditions,  unsuccessful exploration results, possibility of project cost overruns  or unanticipated costs and expenses, changes in the costs and timing of  the development of new deposits, inaccurate reserve and mining inventory  estimates, changes in the price of gold, unanticipated changes in key  management personnel and general economic conditions; 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. Mining  exploration and development is an inherently risky business.  Accordingly, actual events may differ materially from those projected in  the forward-looking statements. This list is not exhaustive of the  factors that may affect any of the Company's forward-looking statements,  including the factors included in the Company’s annual information form  for the year ended December 31, 2024. These and other factors should be  considered carefully and readers should not place undue reliance on the  Company's forward-looking statements. 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 Estimates of Reserves and Resources
    Reserve  and resource estimates included in this news release have 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. NI 43-101 is a rule developed by the Canadian  Securities Administrators that establishes standards for public  disclosure by a Canadian company of scientific and technical information  concerning mineral projects. Unless otherwise indicated, all mineral  reserve and mineral resource estimates contained in the technical  disclosure have been prepared in accordance with NI 43-101 and the  Canadian Institute of Mining, Metallurgy and Petroleum Definition  Standards on Mineral Resources and Reserves.
    Canadian  standards, including NI 43-101, differ significantly from the  requirements of the Securities and Exchange Commission, and mineral  reserve and resource information included in this news release may not  be comparable to similar information disclosed by U.S. companies.
    Cautionary Note Regarding Non-GAAP Measures
    This  news release includes certain terms or performance measures commonly  used in the mining industry that are not defined under International  Financial Reporting Standards (“IFRS”), including EBITDA, cash costs and  AISC per payable ounce of gold sold. Non-GAAP measures do not have any  standardized meaning prescribed under IFRS and, therefore, they may not  be comparable to similar measures employed by other companies. We  believe that, in addition to conventional measures prepared in  accordance with IFRS, certain investors use this information to evaluate  our performance. The data presented is intended to provide additional  information and should not be considered in isolation or as a substitute  for measures of performance prepared in accordance with IFRS. Readers  should also refer to our management’s discussion and analysis, available  under our corporate profile on SEDAR+ at  www.sedarplus.com for a more detailed discussion of how we calculate such measures.
    All-in Sustaining Costs
    The  Company, in conjunction with an initiative undertaken within the gold  mining industry, has adopted AISC and all-in sustaining cost measures  based on guidance published by World Gold Council ("WGC"). The Company  conforms its AISC and all-in cash cost definitions to that set out in  the guidance and the Company has presented the cash cost figures on a  sold ounce basis. We define All-in Sustaining Costs as total production  cash costs incurred at the applicable mining operation but excludes  mining royalty recognized as income tax within the scope of IAS12, as  well as non-sustaining capital expenditures. Sustaining capital  expenditures, corporate selling, general and administrative expenses,  gains from blue-chip swaps and brownfield exploration expenditures are  added to the cash cost. AISC is estimated at realized metal prices.
    Cash Costs
    Cash  costs include all direct and indirect operating cash costs related  directly to the physical activities of producing metals, including  mining and processing costs, third-party refining and treatment charges,  on-site general and administrative expenses, applicable production  taxes and royalties which are not based on sales or taxable income  calculations , net of by-product credits, but are exclusive of the  impact of noncash items that are included as part of the cost of sales  that is calculated in the consolidated Income Statement including  depreciation and depletion, reclamation, capital, development and  exploration costs.
    Management believes that cash  cost and AISC measures provide useful information regarding the  Company's ability to generate operating earnings and cash flows from its  mining operations and uses such measures to monitor the performance of  the Company's mining operations. In addition, the Company believes that  each measure provides useful information to investors in comparing, on a  mine-by-mine basis, our operations relative performance on a  period-by-period basis, against our competitors’ operations.
    EBITDA
    EBITDA  is a non-IFRS measure which is calculated as net income before  interest, taxes, depreciation, and amortization, and is an alternate  measure of profitability to net income. Management believes it is used  by investors and analysts as useful indicators of assessing a company's  profitability and financial performance.
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