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Fortuna reports second quarter 2026 production of 72,217 gold equivalent ounces and advances key growth initiatives

Production Results

NEWS RELEASE

Fortuna reports second quarter 2026 production of 72,217 gold

equivalent ounces and advances key growth initiatives

Vancouver, British Columbia, July 9, 2026 : Fortuna Mining Corp. (NYSE: FSM |

TSX: FVI) reports production results for the second quarter and first half of 2026 from its three

operating mines in West Africa and Latin America, and provides updates on growth initiatives, capital

allocation, safety, and key operating activities across its portfo lio. All figures presented in this news

release are expressed in U.S. dollars, unless otherwise indicated.

Q2 2026 highlights

Production

• Production totaled 72,217 gold equivalent ounces (“GEO”) 1,2 in the second quarter of 2026,

broadly in line with 72,872 GEO in Q1 20262,5,6 and slightly above 71,229 GEO in Q2 20252,3,4.

First-half production totaled 145,089 GEO, positioning the Company to achieve its 2026

annual production guidance of 281,000 to 305,000 GEO 7.

Growth initiatives

• Séguéla process plant expansion studies were completed in late June by Lycopodium. The

proposed expansion would increase processing capacity to approximately 2.3 million tonnes

per annum and is currently being evaluated for a construction decision expected in the coming

weeks.

• Diamba Sud advanced toward a final investment decision following the receipt of the

Environmental and Social Impact Assessment (ESIA) , and the publication of feasibility study

(FS) results. The FS highlighted a robust project with an after -tax NPV 5% of $1.0 billion, an

IRR of 60%, and a one-year payback period at a gold price of $3,500 per ounce 8.

Return to shareholders

• Returned $80.2 million to shareholders through the repurchase of 8.6 million common shares

under the Company’s normal course issuer bid during the second quarter of 2026, at an

average price of $9.32 per share. This follows $20.3 million of share repurchases in Q1 2026,

and $12.1 million in Q4 2025.

Safety

• It is with deep regret that we report a fatal accident involving an employee of one of our mining

contractors 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.

• Total Recordable Injury Frequency Rate (TRIFR) for Q2 2026 was 1.23, compared to 1.16 in

Q1 2026 per million hours worked.

-2-

Q2 and H1 2026 consolidated GEO production

GEO Production

Q2 2026 Q1 2026 H1 2026 2026 Annual Guidance

Ongoing Operations

Séguéla, Côte d’Ivoire 41,683 42,016 83,699 160,000 - 170,000

Lindero, Argentina 20,829 21,545 42,374 92,000 - 102,000

Caylloma, Peru 9,705 9,311 19,016 29,000 - 33,000

Total 72,217 72,872 145,089 281,000 - 305,000

Notes:

1. Gold equivalent ounces (“GEO”) include gold, silver, lead, and zinc and are 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.

2. Consolidated production excludes the divested operations of the San Jose and Yaramoko mines.

3. Refer to Fortuna news release dated July 9, 2025, “Fortuna delivers production of 71,229 gold equivalent ounces from ongoing operations for the

second quarter of 2025.”

4. GEO includes gold, silver, lead, and zinc and is calculated using the following metal prices: $3,306/oz Au, $33.77/oz Ag, $1,945/t Pb and $2,640/t Zn,

or Au:Ag = 1:97.90, Au:Pb = 1:1.70, Au:Zn = 1:1.25.

5. Refer to Fortuna news release dated April 9, 2026, “Fortuna reports production of 72,872 gold equivalent ounces in the first quarter of 2026 and

provides a business update.”

6. GEO includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,874/oz Au, $82.69/oz Ag, $1,918/t Pb and $3,246/t Zn,

or Au:Ag = 1:58.94, Au:Pb = 1:2.54, Au:Zn = 1:1.50.

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

Outlook.”

8. Refer to Fortuna news release dated June 29, 2026, “Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax

IRR of 60% and NPV5% of US$1 billion using US$3,500/oz.”

West Africa region

Séguéla Mine, Côte d’Ivoire: Advancing growth initiatives

Q2 2026 Q1 20261

Tonnes milled 421,464 430,953

Average tpd milled 4,581 4,788

Gold grade (g/t) 3.46 3.21

Gold recovery (%) 92.1 93.4

Gold production (oz)2 41,683 42,016

Notes:

1. Refer to Fortuna news release dated April 9, 2026, “Fortuna reports production of 72,872 gold equivalent ounces in the first quarter of 2026 and provides

a business update”

2. Production includes doré only

Mining

Séguéla mined a total of 433,231 tonnes of ore, averaging 3.06 g/t Au and containing an estimated

42,555 ounces of gold from the Antenna, Ancien, Koula, and Sunbird pits. A total of 5,902,142 tonnes

of waste was mined during the period, resulting in a stri p ratio of 13.6:1. Additionally, 731,647 tonnes

of waste was mined during the quarter at Sunbird South to gain access to the underground portal

position.

-3-

Processing

Séguéla produced 41,683 ounces of gold during the quarter at an average head grade of 3.46 g/t Au,

broadly in line with the previous quarter and slightly ahead of the mine plan. Tonnes milled were slightly

lower than in the previous quarter, reflecting a planned mill reline during the period.

Project updates

Process plant expansion study

Process plant expansion studies were completed during the quarter by Lycopodium, including

requirements for supporting infrastructure. The proposed expansion would increase processing

capacity to approximately 2.3 million tonnes per annum and is designed to improve recoveries through

increased residence time in the leach circuit.

The scope primarily includes the addition of a ball mill and increased thickener, leach, and gravity

circuit capacity, with existing primary crushing capacity determined to be sufficient for the proposed

throughput.

Estimated project capital is approximately $100 million, including additional backup power generation

capacity and supporting infrastructure. The project is currently being evaluated for a construction

decision.

Sunbird Underground Project

The Sunbird Underground Project continued to advance . During the quarter, Fortuna announced a

34% increase in estimated Mineral Reserve gold ounces and a 55% increase in Inferred Mineral

Resource gold ounces for the Sunbird Underground deposit. Drilling continues to infill Inferred Mineral

Resources and test down-dip and strike extensions.

In parallel, the Company approved a $48 million budget for underground equipment, infrastructure,

and the establishment of an owner-operator team, with orders already placed for long-lead items.

The ESIA for the Sunbird Underground Project has been filed with the government of Côte d’Ivoire

and is at an advanced stage of review, with the permit expected to be received in Q4 2026.

Solar power plant

The 6 MW photovoltaic solar power plant has been commissioned. In light of the expected

advancement of the process plant expansion and Sunbird Underground Project, the Company is

evaluating an expansion of the solar plant to 10 MW. No upfront capital investment by Fortuna would

be required for this expansion, as the contractor would incorporate the related capital cost into its fee.

Exploration activities

During the quarter, two additional drill rigs were mobilized to Séguéla, increasing the total number of

rigs on site to seven. Two rigs remain active at Sunbird, while the remaining five are focused on

upgrading Kingfisher Inferred Mineral Resources to Indicated status and testing further extensions of

the Kingfisher deposit.

-4-

Year-to-date production

Séguéla produced a total of 83,699 ounces of gold in the first half of 2026 and remains on track to

achieve annual production guidance, while advancing key growth initiatives including the process plant

expansion study and Sunbird Underground Project.

Diamba Sud Gold Project, Senegal: Advancing toward final investment decision

During the second quarter of 2026, the Diamba Sud Gold Project advanced toward a final investment

decision following the receipt of the ESIA and publication of feasibility study results. The related NI 43-

101 Technical Report is expected to be filed on SEDAR+ within the required 45 -day period.

Early works and procurement activities continued to support project readiness , including construction

of the new site access road and installation of additional temporary accommodation and office facilities

for the owner’s project and pre-production teams. The contract for a new 320 -person camp has been

awarded, and tendering for other major construction packages is well advanced. Letters of award have

been issued for the project’s critical path contracts, including the process plant and power station ,

securing the delivery schedule for the heavy fuel oil generators, the project’s longest-lead item, which

are expected in mid-2027. In addition, tenders for all process plant long-lead equipment, including the

SAG mill and jaw crusher, have been launched, with purchase orders expected early in the third

quarter.

The project remains positioned for a final investment decision, supporting continued momentum

toward first gold production in mid-2028.

Latin America region

Lindero Mine, Argentina: Positioned for stronger second-half production

Q2 2026 Q1 20261

Ore placed on pad (t) 1,558,750 1,525,286

Gold grade (g/t) 0.64 0.62

Gold production2 (oz) 20,829 21,545

Notes:

1. Refer to Fortuna news release dated April 9, 2026, “Fortuna reports production of 72,872 gold equivalent ounces in the first quarter of 2026 and provides a

business update.”

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

Mining

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. With the completion

in the second quarter of key capital projects aimed at improving comminution reliability and availability,

the operation is well positioned to deliver stronger production and lower sustaining costs in the second

half of the year.

During the second quarter, Lindero mined 1.38 million tonnes of ore at a strip ratio of 1.81:1. A total of

1.56 million tonnes was stacked on the leach pad at an average gold grade of 0.64 g/t, containing an

estimated 32,008 ounces of gold. Gold ounces placed increased by 4.8% compared to the first quarter,

in line with the planned mine sequence and supporting anticipated production growth in the remainder

of 2026.

-5-

Processing

Lindero produced 20,829 ounces of gold during the second quarter of 2026, broadly consistent with

production levels achieved in the first quarter.

Looking ahead, with all major plant capital projects now complete, Management expects improved

mechanical availability across the processing circuit, supporting higher crushing and stacking rates.

Combined with higher ore grades scheduled in the mine plan for the second half of the year, these

improvements are expected to drive a significant increase in gold production and support the

achievement of Lindero’s 2026 annual guidance.

Year-to-date production

Lindero produced a total of 42,374 ounces of gold in the first half of 2026 and remains on track to

achieve annual production guidance.

Exploration activities

Brownfields exploration at Lindero continued during the quarter, with two drill rigs focused on testing

Inferred Mineral Resources and open mineralization areas below the ultimate Mineral Reserve pit

shell. The program is advancing as planned and is expected to be completed during the third quarter

of 2026.

At the Cerro Lindo gold prospect, drilling is targeting approximately 7,000 metres, with the current

campaign expected to be completed by year-end.

-6-

Caylloma Mine, Peru: Continued strong operating performance

Q2 2026 Q1 20261

Tonnes milled 141,337 136,701

Average tpd milled 1,588 1,553

Silver grade (g/t) 62 72

Silver recovery2 (%) 82.26 81.89

Silver production (oz) 231,294 257,603

Lead grade (%) 2.76 2.99

Lead recovery (%) 90.89 90.59

Lead production (lbs) 7,815,387 8,174,740

Zinc grade (%) 4.26 4.21

Zinc recovery (%) 90.64 90.80

Zinc production (lbs) 12,037,240 11,525,766

GEO production (oz) 9,7053 9,3114

Notes:

1. Refer to Fortuna news release dated April 9, 2026, “Fortuna reports production of 72,872 gold equivalent ounces in the first quarter of 2026 and provides a

business update.”

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: $4,446/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. GEO production includes gold, silver, lead, and zinc and is calculated using the following metal prices: $4,874/oz Au, $82.69/oz Ag, $1,918/t Pb and

$3,246/t Zn, or Au:Ag = 1:58.94, Au:Pb = 1:2.54, Au:Zn = 1:1.50.

Mining

Mine production totaled 133,940 tonnes of ore in the second quarter, predominantly from overhand

cut-and-fill mining, which accounted for 7 5% of production, with 25% extracted through sub -level

stoping.

Processing

Caylloma produced 231,294 ounces of silver during the second quarter at an average head grade of

62 g/t Ag, a 10% decrease compared to the previous quarter, in line with the planned mining sequence

for the period. Zinc and lead production totaled 12.0 million pounds and 7.8 million pounds,

respectively, at average head grades of 4.26% Zn and 2.76% Pb, reflecting cons istent production

when compared to the first quarter and in line with the mining sequence.

Project update

As of June 30, 2026, the project to expand the capacity of tailings storage facility No. 3 at the Caylloma

Mine was 28% complete and progressing according to plan.

Year-to-date production

Caylloma produced 9,705 GEO in the second quarter and 19,016 GEO in the first half of 2026,

positioning the mine to achieve its annual production guidance.

-7-

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 and

a portfolio of exploration projects in Argentina, Côte d’Ivoire, Guinea, Guyana, 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 | [email protected] | fortunamining.com | X | LinkedIn | YouTube | Instagram | TikTok

-8-

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 plan s 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; statements reiterating the Company’s 202 6

annual production guidance and the likelihood of the Company meeting such annual production

guidance, including that the Lindero Mine is positioned for a stronger second half o f 2026 to achieve

mid-point of its production guidance ; statements relating to the planned underground project at the

Séguéla Mine and the anticipated timing for the receipt of the ESIA for the project ; the evaluation of

an expansion to the solar power plant at the S éguéla Mine and the costs related to same; the

evaluation of the results from the processing plant expansion studies at Séguéla and the estimated

resulting increase in tonnes milled and improvement in recoveries, the timing of a construction

decision for the plant expansion ; statements regarding the Company’s brownfields and greenfields

exploration activities; statements regarding the development of the Diamba Sud gold project, including

the timing of the filing of the feasibility study, delivery of long lead items, final investment decision and

first gold pour; statements regarding the completion of certain capital projects with the expectation of

improving comminution reliability and availabilit y and improved mechanical availability across the

processing circuit; statements regarding the project to increase tailings storage facility at the Caylloma

Mine; 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 liabi lity 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