{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-23-039786","form_type":"8-K/A","ticker":"PUBC","cik":"0001575858","company_name":"Purebase Corp","filed_at":"2023-11-07T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.596936+00:00","generated_at":"2026-06-08T15:17:11.810533+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Purebase cancels 116M share option in US Mine pact, adopts $20/ton royalty","bullets":["Cancelled US Mine's option to purchase up to 116,000,000 shares of common stock.","Replaced with production royalty of $20.00 per ton of kaolin clay for supplementary cementitious materials.","CEO A. Scott Dockter and director John Bremer are manager-members of US Mine; abstained from board approval.","Amendment dated November 1, 2023 to Materials Extraction Agreement originally dated May 27, 2021."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-23-039786","json":"https://secwatch.observer/filing/0001493152-23-039786.json","markdown":"https://secwatch.observer/filing/0001493152-23-039786.md","text":"https://secwatch.observer/filing/0001493152-23-039786.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1575858/000149315223039786/0001493152-23-039786-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1575858/000149315223039786/form8-ka.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-08T15:17:11.810533+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":"273f2ee1a579e6d1767238046a095d4603aeee8a","claim":"Purebase Corp amended Materials Extraction Agreement with US Mine, LLC valued at $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/1575858/000149315223039786/0001493152-23-039786-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"amendment"},{"label":"Counterparty","value":"US Mine, LLC"},{"label":"Value","value":"$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"}