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Fortuna Reports Results for the Fourth Quarter and Full Year 2025

Financials

Fortuna Reports Results for the Fourth Quarter and Full Year 2025

(All amounts are expressed in US dollars, tabular amounts in millions, unless otherwise stated)

Record quarterly and annual free cash flow1 of $132.3 million and $330.0 million as Fortuna

delivers on its operational plan and achieves production guidance

Vancouver, British Columbia, February 18, 2026: Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) (“Fortuna”

or the “Company”) today reported its financial and operating results for the fourth quarter and full year

of 2025.

(Results from the Company’s San Jose and Yaramoko assets have been excluded from the 2025 continuing results, along with the comparative

figures, due to the classification of the assets as discontinued as at December 31, 2025 unless otherwise disclosed.)

Jorge A. Ganoza President and CEO of Fortuna, commented, “Q4 was a strong end to the year as we

delivered record free cash flow from operations of $132.3 million and returned $ 12.1 million to our

shareholders.” Mr. Ganoza continued “We finished the year in line with production guidance but at a

higher AISC due to the impact of rising metal prices on royalties , gold equivalent ratios and share based

compensation expenses. Adjusting for these items our AISC would have been under $1,700 an ounce.”

Mr. Ganoza concluded “2025 was a transition year for Fortuna as we streamlined our portfolio by divesting

non-core assets and positioned the Company for its next phase of growth at Diamba Sud and the Séguéla

plant expansion. All this is underpinned by one of the best balance sheets in our peer group with $704

million in liquidity and $381 million in net cash.”

Fourth Quarter and Full Year 2025 Highlights

Cash and Cash Flow

• Record free cash flow1 from ongoing operations of $132.3 million; $330.0 million for 2025

• $147.6 million of net cash from operating activities before changes in working capital or $0.48

per share; $455.4 million for the year or $1.48 per share

• Liquidity increased to $704.0 million, and the net cash1 position strengthened to $381.5 million,

from $58.8 million at the end of 2024, a YoY increase of $322.7 million

• Quarter-end cash balance of $554.0 million, an increase of $115.7 million QoQ and $322.7 million

YoY

Profitability

• Record adjusted attributable net income1 from continuing operations was $71.3 million or $0.23

basic EPS; $203.1 million or $0.66 basic EPS for 2025. Results for the quarter were impacted by

lower production at Lindero due to downtime of the HPGR in December

• Attributable net income from continuing operations of $ 68.1 million or $0.22 basic EPS; $269.7

million or $0.88 basic EPS for 2025

Return to Shareholders

• In 2025, the Company returned $16.2 million to shareholders through its share buyback

program with an additional $5.0 million in early 2026

Operational

• Gold equivalent production (“GEO”) of 65,130 ounces; 317,001 GEOs in 2025 meeting annual

guidance

Fortuna | 2

• Consolidated cash cost per GEO1 of $971; $944 for 2025 in line with guidance

• Consolidated AISC per GEO 1 of $2,054 for Q4 2025 and $1,870 for full year 2025. Excluding the

impact of rising gold prices on royalties ($60/ounce), gold equivalent ratios ($54/ounce) and the

value of the Company’s shares increasing share based compensation expenses ($60/ounce) AISC

was $1,696 and within guidance.

• Total recordable injury frequency rate for the year was 0.74 which reflects continued strong

safety performance; and zero lost time injuries in the quarter

Growth and Business Development

• Expanded Mineral Reserves at Séguéla by 31% and extending the mine life to over 9 years. Refer

to the news release dated January 20, 2026 “Fortuna Expands Mineral Reserve Gold Ounces by

31% and Extends Life of Mine to Over 9 Years at the Séguéla Mine, Côte d’Ivoire”

• Commissioned a feasibility study to expand the plant throughput at Séguéla by 15 to 40% with

results expected in the second quarter of 2026. Refer to the news release dated December 3,

2025 “Fortuna Awards the Séguéla Mine Plant Expansion Study, Côte d’Ivoire”

• At the Diamba Sud Gold Project, supported by robust PEA economics (Refer to the news release

dated October 15, 2025, “ 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”) the Company has

allocated approximately $67 million to advance early works and the order of critical equipment

to de-risk construction. A construction decision is targeted for mid 2026.

Cautionary Statement: The PEA is preliminary in nature, and 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; as such, there is no certainty that the PEA results will be realized. Mineral resources that are not

mineral reserves do not have demonstrated economic viability.5

Fortuna | 3

Fourth Quarter 2025 Consolidated Results

Three months ended Years ended December 31,

(in millions of US dollars)

Dec. 31,

2025

Dec. 31,

2024

Sep. 30,

2025 2025 2024 %

Change

OPERATING STATISTICS

Total production including discontinued operations (GEO) 65,130 116,358 72,462

317,001

455,958 (30%)

Production from continuing operations (GEO) 65,130 75,562 72,462

279,207

292,169 (4%)

Cash cost continuing ops($/oz GEO) (1)(2) 971 918 942 928 855 9%

Cash cost ($/oz GEO) (1)(2) 971 1,015 942 944 987 (4%)

AISC continuing ops($/oz GEO) (1)(2)(3) 2,054 1,842 1,987 1,933 1,634 18%

AISC including discontinued ops($/oz GEO) (1)(2)(3) 2,054 1,772 1,987 1,870 1,640 14%

FINANCIAL HIGHLIGHTS

Sales 270.2 195.2 251.4 947.1 677.2 40%

Attributable net income from continuing operations 68.1 14.7 123.6 269.7 84.5 219%

Attributable earnings per share from continuing operations

- basic 0.22 0.05 0.40 0.88 0.27 226%

Adjusted attributable net income from continuing

operations (1) 71.3 19.4 51.0 203.1 77.5 162%

Adjusted attributable net income from continuing

operations earnings per share 0.23 0.06 0.17 0.66 0.25 164%

Adjusted EBITDA (1) 157.2 94.9 130.8 514.0 331.1 55%

CASH FLOW AND CAPEX

Net cash provided by operating activities - continuing

operations 162.3 99.2 111.3 455.4 235.7 93%

Free cash flow from ongoing operations (1) 132.3 51.1 73.4 330.0 102.6 222%

Capital expenditures (4)

Sustaining 23.9 41.0 31.2 109.0 122.5 (11%)

Sustaining leases 6.6 4.6 6.5 24.0 15.3 57%

Growth capital 20.6 10.5 17.4 69.0 38.6 79%

Dec. 31,

2025

Dec. 31,

2024

%

Change

Cash and cash equivalents and short-term investments 554.0 231.3 140%

Net liquidity position (excluding letters of credit) 704.0 381.3 85%

Shareholder's equity attributable to Fortuna shareholders 1,677.0 1,403.9 19%

(1) Refer to Non-IFRS Financial Measures section at the end of this news release and to the MD&A accompanying the Company’s financial

statements filed on SEDAR+ at www.sedarplus.ca for a description of the calculation of these measures.

(2)Gold equivalent was calculated using the realized prices for gold of $3,452/oz Au, $40.2/oz Ag, $1,962/t Pb and $2,864/t Zn for Year 2025.

Gold equivalent was calculated using the realized prices for gold of $2,404/oz Au, $27.9/oz Ag, $2,072/t Pb and $2,786/t Zn for Year 2024.

(3) Year to date 2025 AISC reflects production and costs for Yaramoko from January 1 to April 14, 2025, being the date that the Company

agreed to the assumed handover of operations to the purchaser.

(4) Capital expenditures are presented on a cash basis

(5)Refer to the table on page 30 of this news release for a summary of the key assumptions, operational parameters and economic results and

values from the PEA

Figures may not add due to rounding

Contribution from discontinued operations, the Yaramoko and San Jose mines which were disposed of in the second quarter of 2025,

have been removed where applicable

Fortuna | 4

Fourth Quarter 2025 Results

Q4 2025 vs Q3 2025

Cash cost per ounce and AISC

Cash cost per GEO sold from continuing operations was $971 in Q4 2025, representing a marginal increase

from $942 in Q3 2025.

All-in sustaining costs per GEO from continuing operations was $ 2,054 in Q4 2025 representing a $ 67

increase from the $1,9 87 recorded in Q 3 2025. The rise was primarily driven by lower ounces sold at

Lindero and higher royalties of $55, partially offset by lower AISC at Séguéla resulting from a decrease in

strip ratio quarter over quarter.

Attributable Net Income and Adjusted Net Income

Attributable net income from continuing operations for the period was $ 68.1 million in Q4 2025 ,

compared to $123.6 million in Q3 2025. Net income in Q3 2025 included the reversal of an impairment

charge of $52.7 million and the reversal of a previous write-down of $16.7 million of low-grade stockpiles

at Lindero as a result of an increase in medium and long-term gold price assumptions.

After adjusting for impairment reversals and other non-recurring items, adjusted attributable net income

was $ 71.3 million or $0. 23 per share compared to $ 51.0 million or $0. 17 per share in Q 3 2025. The

increase was primarily driven by higher realized gold prices, partially offset by lower gold sales volume,

and a modestly higher effective tax rate. The realized gold price in Q4 2025 was $4,166 per ounce

compared to $3,467 in Q3 2025. Lower gold sales were mainly attributable to lower production at Lindero

related to a 12-day stoppage of the HPGR tertiary crusher in December.

Foreign Exchange

In Q4 2025, the Company recorded a foreign exchange loss of $2.9 million compared to a loss of $7.4

million in Q3 2025.

For the full year, the Company recorded a foreign exchange loss of $7.8 million, comprised of a $13.8

million realized loss and a $6.0 million unrealized gain. The foreign exchange realized loss was primarily

related to the Company’s Argentine operations, where the peso devalued 41% during 2025 . Of the

realized loss, over $6.0 million relates to cash accumulated in -country in the first half of 2025; however,

this loss was fully offset by interest, investment, and derivative gains throughout the year. In early Q3

2025 the Company was able to restart the repatriation of funds from Argentina, allowing local cash

balances to be minimized . Foreign exchange losses of $3. 4 million were incurred as part of the cost of

repatriations during the year through the "Blue-Chip Swap Market”.

Cash Flow

Net cash generated by operations before changes in working capital totaled $147.6 million or $0.48 per

share. After adjusting for working capital, net cash generated by operations for the quarter was $162.3

million compared to $111.3 million in Q3 2025. T his increase was driven by higher sales, lower income

tax payments, and a favorable swing in working capital, which contributed $14.8 million in Q4 compared

to an outflow of $2.6 million in the prior quarter. Income taxes paid decreased to $20.8 million in Q4 2025

(including $14.4 million of withholding taxes from fund repatriation), down from $34.7 million in Q3 2025.

Fortuna | 5

The Q3 figure included $13.6 million in withholding taxes paid related to the repatriation of funds from

Argentina and Côte d’Ivoire.

Free cash flow from ongoing operations in Q4 2025 was $132.3 million, an increase of $58.9 million

compared to $73.4 million in Q3 2025 reflecting higher cash from operating activities and a reduction in

sustaining capital expenditures from $31.2 million in the prior quarter to $23.9 million.

In Q4 2025, the Company invested $20.6 million in non -sustaining capital expenditures , comprising of

$10.7 million in mine site exploration and other items, and $10.1 million at the Diamba Sud project.

Q4 2025 vs Q4 2024

Cash cost per ounce and AISC

Consolidated cash cost per GEO increased to $971 in Q4 2025, representing a $53 increase compared to

$918 recorded in Q4 2024. The increase was mainly due to higher stripping ratios at Séguéla and Lindero,

as per the mine plan.

All-in sustaining costs per gold equivalent ounce from continuing operations increased $212 to $2,054 in

Q4 2025 from $1,842 in Q4 2024. This increase primarily resulted from higher royalties of $139, the impact

of higher gold prices on the GEO calculation at Caylloma of $74, and $77 related to higher share-based

compensation. This was partially offset by a decrease in AISC at Lindero explained by lower capital

expenditures in 2025.

Attributable Net Income and Adjusted Net Income

Attributable net income from continuing operations was $68.1 million, or $0.22 per share, compared to

$11.4 million, or $0.05 per share, in Q4 2024.

After adjusting for reversals of impairments and stockpile write -downs and other non -recurring items,

adjusted attributable net income from continuing operations was $71.3 million or $0.23 per share

compared to $19.4 million or $0.06 per share in Q4 2024. The increase was primarily due to higher realized

gold prices, which averaged $4,166 per ounce in Q4 2025 compared to $2,659 per ounce in Q4 2024. This

was partially offset by lower production and higher share-based compensation expense of $6.9 million

compared to $1.6 million in Q4 2024.

Depreciation and Depletion

Depreciation and depletion decreased by $2.3 million to $44.9 million compared to $47.2 million Q4 2024.

Despite the lower expense, depletion per ounce increased by $60. This was primarily due to higher

depletion rates at Lindero following the impairment reversal of $52.7 million recorded in Q3 2025. This

increase was partially offset by lower depletion per ounce at Seguela, which benefitted from the addition

of low discovery-cost ounces.

Depreciation and depletion in the period included $16.2 million (FY 2025: $71.4 million) related to the

purchase price allocation from the 2021 Roxgold acquisition.

Fortuna | 6

Cash Flow

Net cash generated by operations for the quarter was $162.3 million compared to $99.2 million in Q4

2024. The increase was primarily driven by higher gold prices and favourable changes in working capital

in Q4 2025 compared to Q4 2024.

Free cash flow from ongoing operations in Q4 2025 was $132.3 million, compared to $51.1 million

reported in Q4 2024. The increase was mainly due to higher prices as discussed above, and lower

sustaining capital expenditures of $17.1 million year over year.

Fortuna | 7

Séguéla Mine, Côte d’Ivoire

Three months ended December 31, Years ended December 31,

2025 2024 2025 2024

Mine production

Tonnes milled 410,014 430,117 1,718,973 1,561,800

Average tonnes crushed per day 4,506 4,727 4,709 4,279

Gold

Grade (g/t) 3.16 2.95 2.98 2.95

Recovery (%) 92 92 92 93

Production (oz) 36,942 35,244 152,426 137,781

Metal sold (oz) 36,998 36,384 152,384 137,753

Realized price ($/oz) 4,162 2,658 3,450 2,399

Unit costs

Cash cost ($/oz Au) (1) 710 653 679 584

All-in sustaining cash cost ($/oz Au) (1) 1,576 1,376 1,560 1,153

Capital expenditures ($000's) (2)

Sustaining 9,053 14,049 57,085 35,184

Sustaining leases 4,070 3,347 16,463 10,381

Growth capital 6,870 5,021 29,509 19,458

(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

During the fourth quarter of 2025, mine production totaled 340,464 tonnes of ore, averaging 3.71 g/t Au,

and containing an estimated 40,614 ounces of gold from the Antenna, Ancien, and Koula pits. Ore tonnes

mined were lower than tonnes milled during the q uarter, in line with the mine plan and the strategy to

reduce surface stockpiles. A total of 3,920,293 tonnes of waste was moved during the period, resulting in

a strip ratio of 11.5:1.

In the fourth quarter of 2025, Séguéla processed 410,014 tonnes of ore, producing 36,942 ounces of gold,

at an average head grade of 3.16 g/t Au, a 5% decrease in tonnes of ore and 7% increase in average head

grade, compared to the same period of the previ ous year. Lower tonnes milled during the quarter were

primarily due to downtime caused by a failure of the SAG mill motor cooling system in October 2025 and

other planned maintenance activities.

Gold production in 2025 totaled 152,426 ounces, above the upper end of the annual guidance range. An

11% increase in ounces of gold produced during the year was mainly due to the realization of throughput

optimization projects through 2024 increasing ore processed, and a 19-day loss of time in 2024 as a result

of power shedding from the national grid supplier.

Cash cost per gold ounce sold was $710 for the fourth quarter and $679 for the full year of 2025, compared

to $653 for the fourth quarter and $584 for the full year of 2024. Cash costs were higher due to an increase

in mining costs from higher stripping requirements in line with the mine plan and higher processing costs

due to an increase of onsite power generation.

All-in sustaining cash cost per gold ounce sold was $1,576 for the fourth quarter of 2025 and $1,560 for

the full year of 2025, compared to $1,376 for the fourth quarter and $1,153 for the full year of 2024. The

Fortuna | 8

increase for the quarter and for the year was primarily a result of higher cash cost per ounce sold, higher

sustaining capital from capitalized stripping and higher royalties due to higher gold prices and a 2%

increase in the royalty rate effective January 10, 2025.

The site finished the year in line with the AISC guidance range of $1,500 to $1,600 per ounce.