{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-26-012054","form_type":"8-K","ticker":"USGO","cik":"0001947244","company_name":"U.S. GoldMining Inc.","filed_at":"2026-03-23T23:59:59+00:00","discovered_at":"2026-05-14T18:02:36.850704+00:00","generated_at":"2026-05-15T09:24:59.642656+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"Whistler PEA shows $2.0B after-tax NPV5%, 33% IRR, 2.1-year payback at base prices","bullets":["After-tax NPV5% of $2.0B, IRR 33%, initial payback 2.1 years at base prices ($3,200/oz Au, $4.50/lb Cu, $37.50/oz Ag).","At spot prices ($5,000/oz Au, $5.85/lb Cu, $70/oz Ag), after-tax NPV5% increases to ~$4.9B, IRR 62%, payback 1.2 years.","Average annual production of 246,000 oz AuEq over 14.6-year mine life; first 3 years 345,000 oz AuEq annually.","Initial capex of ~$1.3B (incl. 20% contingency), LOM AISC $1,046/oz Au (by-product basis).","PEA considers only one of three deposits; exploration potential for additional targets."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-26-012054","json":"https://secwatch.observer/filing/0001493152-26-012054.json","markdown":"https://secwatch.observer/filing/0001493152-26-012054.md","text":"https://secwatch.observer/filing/0001493152-26-012054.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1947244/000149315226012054/0001493152-26-012054-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1947244/000149315226012054/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T09:24:59.642656+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}