{"filing":{"accession_number":"0001104659-26-073886","cik":"0001341335","ticker":"FSM","company_name":"FORTUNA MINING CORP.","form":"6-K","filing_date":"2026-06-15","report_date":null,"primary_document":"tm2617960d1_6k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1341335/000110465926073886/tm2617960d1_6k.htm"},"events":[{"id":12220,"run_id":10784,"accession_number":"0001104659-26-073886","anchor_item_number":"EX-99.1","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"This news release announces Fortuna's receipt of an environmental decree from Senegal's Ministry of Environment approving the Environmental and Social Impact Assessment for the Diamba Sud Gold Project. This is a material operational and regulatory milestone—a key permitting approval that advances the project toward mining permit and final construction decision (targeted mid-2026). While not a discrete M\u0026A event, executive change, or financial restatement, it represents a significant operational achievement that would affect a reasonable investor's assessment of the company's ability to develop this project. The disclosure emphasizes the project's robust economics (72% after-tax IRR, US$563M NPV) and the company's progress toward major milestones, making it material to the registrant's strategic development pipeline.","company_name":"FORTUNA MINING CORP.","ticker":"FSM","filing_date":"2026-06-15","form":"6-K","submitted_at":null,"items":[{"id":9020,"accession_number":"0001104659-26-073886","item_number":"EX-99.1","item_title":"tm2617960d1_ex99-1.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This news release announces Fortuna's receipt of an environmental decree from Senegal's Ministry of Environment approving the Environmental and Social Impact Assessment for the Diamba Sud Gold Project. This is a material operational and regulatory milestone—a key permitting approval that advances the project toward mining permit and final construction decision (targeted mid-2026). While not a discrete M\u0026A event, executive change, or financial restatement, it represents a significant operational achievement that would affect a reasonable investor's assessment of the company's ability to develop this project. The disclosure emphasizes the project's robust economics (72% after-tax IRR, US$563M NPV) and the company's progress toward major milestones, making it material to the registrant's strategic development pipeline.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-06-22T02:25:26.694323+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":9020,"accession_number":"0001104659-26-073886","item_number":"EX-99.1","item_title":"tm2617960d1_ex99-1.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This news release announces Fortuna's receipt of an environmental decree from Senegal's Ministry of Environment approving the Environmental and Social Impact Assessment for the Diamba Sud Gold Project. This is a material operational and regulatory milestone—a key permitting approval that advances the project toward mining permit and final construction decision (targeted mid-2026). While not a discrete M\u0026A event, executive change, or financial restatement, it represents a significant operational achievement that would affect a reasonable investor's assessment of the company's ability to develop this project. The disclosure emphasizes the project's robust economics (72% after-tax IRR, US$563M NPV) and the company's progress toward major milestones, making it material to the registrant's strategic development pipeline.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-06-22T02:25:26.694323+00:00","company_name":"FORTUNA MINING CORP.","ticker":"FSM","filing_date":"2026-06-15"}]}