{"filing":{"accession_number":"0001279569-26-000873","cik":"0001641229","ticker":"FFMGF","company_name":"First Mining Gold Corp.","form":"6-K","filing_date":"2026-09-10","report_date":"2026-09-10","primary_document":"firstmining6k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1641229/000127956926000873/firstmining6k.htm"},"events":[{"id":32554,"run_id":29912,"accession_number":"0001279569-26-000873","anchor_item_number":"EX-99.1","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"This is a news release announcing exploration drilling results at the Duparquet Gold Project, specifically high-grade gold intercepts from the Miroir discovery target (e.g., \"5.26 g/t Au over 19.55 m\" and \"3.43 g/t Au over 28.0 m\"). The disclosure reports on an ongoing 15,000 m drilling program and resource model advancement, demonstrating material progress in exploration and resource delineation. While not a discrete M\u0026A event or financial restatement, the expansion of a high-priority discovery zone with multiple robust intercepts represents a material operational and strategic development that would affect a reasonable investor's assessment of the registrant's project value and future development potential.","company_name":"First Mining Gold Corp.","ticker":"FFMGF","filing_date":"2026-09-10","form":"6-K","submitted_at":null,"items":[{"id":35751,"accession_number":"0001279569-26-000873","item_number":"EX-99.1","item_title":"ex991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This is a news release announcing exploration drilling results at the Duparquet Gold Project, specifically high-grade gold intercepts from the Miroir discovery target (e.g., \"5.26 g/t Au over 19.55 m\" and \"3.43 g/t Au over 28.0 m\"). The disclosure reports on an ongoing 15,000 m drilling program and resource model advancement, demonstrating material progress in exploration and resource delineation. While not a discrete M\u0026A event or financial restatement, the expansion of a high-priority discovery zone with multiple robust intercepts represents a material operational and strategic development that would affect a reasonable investor's assessment of the registrant's project value and future development potential.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-09-10T12:12:56.891973+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":35751,"accession_number":"0001279569-26-000873","item_number":"EX-99.1","item_title":"ex991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This is a news release announcing exploration drilling results at the Duparquet Gold Project, specifically high-grade gold intercepts from the Miroir discovery target (e.g., \"5.26 g/t Au over 19.55 m\" and \"3.43 g/t Au over 28.0 m\"). The disclosure reports on an ongoing 15,000 m drilling program and resource model advancement, demonstrating material progress in exploration and resource delineation. While not a discrete M\u0026A event or financial restatement, the expansion of a high-priority discovery zone with multiple robust intercepts represents a material operational and strategic development that would affect a reasonable investor's assessment of the registrant's project value and future development potential.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-09-10T12:12:56.891973+00:00","company_name":"First Mining Gold Corp.","ticker":"FFMGF","filing_date":"2026-09-10"}]}