{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-23-039721","form_type":"8-K","ticker":"PUBC","cik":"0001575858","company_name":"Purebase Corp","filed_at":"2023-11-07T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.597225+00:00","generated_at":"2026-06-08T15:17:45.212055+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Purebase amends extraction deal with US Mine; cancels 116M share option, adopts $20/ton royalty","bullets":["Cancels US Mine's option to purchase up to 116,000,000 shares of Purebase common stock.","Replaces option with a production royalty of $20.00 per ton of metakaolin extracted.","CEO A. Scott Dockter and director John Bremer have ownership interest in US Mine; board approved with abstentions.","Amendment effective November 1, 2023."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-23-039721","json":"https://secwatch.observer/filing/0001493152-23-039721.json","markdown":"https://secwatch.observer/filing/0001493152-23-039721.md","text":"https://secwatch.observer/filing/0001493152-23-039721.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1575858/000149315223039721/0001493152-23-039721-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1575858/000149315223039721/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-08T15:17:45.212055+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":[{"claim_id":"f5b59a77697699a65dce5fb924bfd1e814dd562e","claim":"Purebase Corp amended Second Amendment with US Mine, LLC valued at production royalty of $20.00 per ton (effective 2023-11-01).","evidence_excerpt":"On November 1, 2023, Purebase Corporation (the “Company”) entered into a Second Amendment (the “Amendment”) to the Materials Extraction Agreement with US Mine, LLC (“US Mine”), dated May 27, 2021, as amended on October 6, 2021, and further amended on June 17, 2022","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1575858/000149315223039721/0001493152-23-039721-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"amendment"},{"label":"Counterparty","value":"US Mine, LLC"},{"label":"Value","value":"production royalty of $20.00 per ton"},{"label":"Effective","value":"2023-11-01"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}