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FORTUNA MINING CORP.

US:FSMTSX:FVI
US$10.12Close 7 Oct 2026 · delayed

Past year: ▲ 25%(11.59 – 18.64 CAD)

Market cap
A$4.38bn
Shares on issue
306m
Story beats
47 since 2017
Last event
11 Aug 2026

Announcements, explained

Each one in plain English, with the numbers worked through for a shareholder.

13 July 2026resource reserve update● Neutral

A short notice that the Diamba Sud feasibility technical report had been filed on SEDAR+ and EDGAR. It adds no figures beyond the 29 June announcement, and describes Fortuna as holding three operating mines with exploration in Argentina, Côte d'Ivoire, Guinea, Guyana, Peru and Senegal.

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13 July 2026resource reserve update● Neutral

The Diamba Sud feasibility study technical report, effective 30 June 2026.

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30 June 2026resource reserve update▲ GoodMajor

The feasibility study on Diamba Sud returned a US$1 billion present value at a 5% discount, a 60% return and a one-year payback at US$3,500 gold, rising to US$1.3 billion at US$4,000. Management expects it to be Fortuna's lowest-cost mine and, with the Séguéla expansion, to lift group production about 60% to more than 500,000 ounces in 2028. The Senegalese environmental decree is in hand; a final investment decision awaits the mining permit.

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23 Mar 2026resource reserve update● Neutral

Technical report on the Séguéla gold mine in Côte d'Ivoire, effective 31 December 2025 - the first full report on the mine since it started producing in 2023.

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25 Feb 2026drilling result▲ GoodMajor

The 44 holes for 7,518 metres behind February's resource increase returned 6.0 grams of gold a tonne over 24.1 metres, and made Southern Arc the largest single deposit at Diamba Sud at 6 million tonnes averaging 1.9 grams a tonne for 367,000 ounces. It is open at depth and both ways along strike, and most drilling across the project is still shallow.

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19 Feb 2026resource reserve update▲ GoodMajor

Diamba Sud's indicated resource rose 73% to 1.25 million ounces of gold in 26.0 million tonnes at 1.50 grams a tonne, adding 530,000 ounces, with 94% of all ounces now in the indicated category - the confidence a feasibility study needs. Management ties Diamba Sud and a Séguéla expansion to a target of more than 500,000 ounces of gold a year.

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12 Feb 2026drilling result▲ GoodMajor

Five rigs on Sunbird kept extending high grade at depth and widened a second shoot, with 15.4 grams of gold a tonne over 4.2 metres from 478 metres and 4.1 grams over 13.3 metres from 504 metres. Mineralisation remains open at depth.

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8 Dec 2025drilling result▲ GoodMajor

Southern Arc kept growing, with 6.8 grams of gold a tonne over 35.5 metres true width from infill drilling and broad intervals south-west of the optimised pit shell - 1.7 grams over 29.6 metres and 2.0 grams over 20.0 metres in the same hole. Diamba Sud was heading for a feasibility study and construction decision in the second quarter of 2026.

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28 Nov 2025resource reserve update● Neutral

The technical report for the Diamba Sud project in Senegal, effective 15 October 2025, filed behind the October preliminary economic assessment.

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30 Oct 2025drilling result▲ GoodMajor

The deepest holes yet at Sunbird confirmed a second underground shoot and pushed the central zone another 150 metres down-plunge, with 5.2 grams of gold a tonne over 6.3 metres from 787 metres and 6.0 grams over 11.9 metres from 669 metres, both still open. Over 1.5 kilometres of high-grade strike is now defined.

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15 Oct 2025resource reserve update▲ GoodMajor

The economic assessment for Diamba Sud outlined an open pit with a conventional carbon-in-leach plant: US$563 million present value at a 5% discount, a 72% return and a ten-month payback at US$2,750 gold, for US$283.2 million of construction capital, averaging 147,000 ounces a year over the first three years at all-in sustaining costs of US$904 an ounce. With US$537.3 million of liquidity and US$214.8 million of net cash at mid-2025, Fortuna can fund it from its own balance sheet.

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7 Oct 2025resource reserve update▲ GoodMajor

Filed the environmental and social impact assessment for Diamba Sud with Senegal's environment ministry, the formal start of permitting, with the economic study due in the fourth quarter and a feasibility study and construction decision targeted for the first half of 2026.

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10 Sept 2025drilling progress report● Neutral

Set out a US$19 million greenfields program alongside a US$22 million brownfields budget for 2025, hunting for the next generation of projects in Côte d'Ivoire, Mexico and Argentina. The largest new position is Guiglo in south-west Côte d'Ivoire, 1,142 square kilometres of unexplored Birimian rocks where stream sediment sampling has flagged four anomalies. Nothing here is drilled yet.

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18 Aug 2025drilling result▲ GoodMajor

Kingfisher's infill program finished with 4.5 grams of gold a tonne over 37.4 metres true width confirming broad mineralisation, and step-out holes extended it 300 metres below surface and 250 metres further along strike. Deep drilling at Sunbird returned 8.5 grams over 7.0 metres from 566 metres and found shallow mineralisation about 180 metres into the footwall.

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13 Aug 2025drilling result▲ GoodMajor

Drilling after the cut-off for Southern Arc's first resource returned 22.7 grams of gold a tonne over 21.6 metres true width from only 53 metres downhole and 6.3 grams over 18.2 metres from 31 metres. The deposit is open south, east and at depth, and had been drilled only to about 150 metres.

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5 Aug 2025resource reserve update▲ GoodMajor

Diamba Sud's indicated resource rose 53% in about seven months to 724,000 ounces of gold in 14.2 million tonnes at 1.59 grams a tonne, with inferred up 93% to 285,000 ounces, including first estimates of 194,000 ounces at Southern Arc and 31,000 at Moungoundi. An economic study was due in the fourth quarter of 2025.

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27 May 2025drilling result▲ GoodMajor

Southern Arc emerged as the best prospect yet at Diamba Sud in Senegal, with 8.6 grams of gold a tonne over 13.6 metres true width and 9.3 grams over 11.8 metres in lightly drilled ground, while infill at Area D returned 113.7 grams over 6.4 metres. Auger sampling was turning up further soil anomalies across the property.

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13 Mar 2025drilling result▲ GoodMajor

Infill drilling along the kilometre of Kingfisher inside the pit shell returned 7.2 grams of gold a tonne over 31.5 metres true width, work meant to move Kingfisher into Séguéla's reserves during 2025. At Sunbird, the deepest hole to date cut 4.3 grams over 23.1 metres from 733 metres, and the deposit is still open at depth and down-plunge.

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16 Dec 2024drilling result▲ GoodMajor

Kingfisher now carries a first inferred resource of 294,000 ounces at 2.3 grams a tonne, and this drilling extended it about 150 metres further along strike with 4.1 grams over 15.3 metres and 3.3 grams over 17 metres. At Sunbird, mineralisation was traced roughly 650 metres beyond the limit of the existing underground resource and is still open.

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12 Sept 2024drilling result▲ GoodMajor

Western Splay emerged as the next prospect at Diamba Sud, with 6.9 grams of gold a tonne over 33.3 metres true width and 8.9 grams over 27.7 metres - wide intersections at good grade in ground that had barely been drilled.

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10 Sept 2024drilling result▲ GoodMajor

Kingfisher now has a drill-defined strike of more than 2 kilometres and is still open at depth, with 14.2 grams of gold a tonne over 16.8 metres true width. Depth extension drilling at Sunbird, 8.8 grams over 6.3 metres at 301 metres, continued to support underground mining beneath the Séguéla pits.

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25 June 2024drilling result▲ GoodMajor

First strong results from Senegal: 31.3 grams of gold a tonne over 12.0 metres true width at the Karakara prospect at Diamba Sud, with early holes at satellite targets returning 8.9 grams over 27.7 metres at Western Splay and 2.9 grams over 15.3 metres at Kassasoko. This is the first release under the company's new name, Fortuna Mining Corp.

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20 June 2024drilling result▲ GoodMajor

Kingfisher delivered 23.7 grams of gold a tonne over 17.9 metres true width from 113 metres, with the Badior prospect returning a string of intersections between 15 and 38 grams over 3.5 to 11.9 metres and the Ancien deposit 27.4 and 12.3 grams at depth. Three separate prospects around one mine were all returning ore-grade widths.

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16 Apr 2024drilling result▲ GoodMajor

Eight months of drilling turned the Yessi discovery at San Jose into a defined system, with 1,327 grams a tonne silver-equivalent over 3.0 metres true width and 1,036 grams over 8.1 metres marking high-grade shoots, and 179 grams over 17.5 metres showing the vein can also be wide.

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11 Mar 2024drilling progress report▲ GoodMajor

Found a fourth new prospect at Séguéla, Kingfisher, after Barana, Badior and Kestrel in 2022 and 2023 - an unusual run of discoveries around a mine only a year into production. Drilling below the Koula pit returned 68.0 grams of gold a tonne over 2.1 metres inside a 22.5 gram intersection over 9.8 metres, opening the possibility of underground mining, and confirmatory drilling at Diamba Sud in Senegal was wrapping up.

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8 Mar 2024resource reserve update● Neutral

Technical report on the San Jose silver-gold mine in Oaxaca, Mexico, effective 31 December 2023, filed three weeks after the Caylloma report.

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16 Feb 2024resource reserve update● Neutral

Technical report on the Caylloma silver-lead-zinc mine in Peru, effective 31 December 2023.

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12 Dec 2023drilling result▲ GoodMajor

More high grade around Séguéla: 17.3 grams of gold a tonne over 6.3 metres true width at the newly found Badior prospect, and 27.1 grams over 7.7 metres at 239 metres depth in the Ancien deposit, which points to mineralisation below the pits. The update also covered first work on the newly acquired Diamba Sud ground in Senegal and San Jose in Mexico.

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5 Sept 2023drilling result▲ GoodMajor

Mine geologists at San Jose in Mexico drilled into a previously unknown blind structure, now called the Yessi vein, returning 1,299 grams a tonne silver-equivalent over 9.9 metres true width and 621 grams over 5.0 metres, about 200 metres east of the known Victoria zone. It is a real discovery inside an eighteen-year-old mine whose reserves had been shrinking. The release carries a typographical date of September 5, 2021 in its body; the filing is from 2023.

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8 Aug 2023drilling result▲ GoodMajor

Infill drilling at Sunbird finished and moved into reserve estimation and mine design intended to extend Séguéla's life. Attention shifted to new ground, with 90.9 grams of gold a tonne over 1.8 metres true width near surface at the Barana prospect, while at Yaramoko in Burkina Faso high grade was found at least 130 metres west of the Zone 55 resource - 32.8 grams over 3.1 metres - and confirmed by underground development.

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