---
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"
generated_at: "2026-06-08T15:17:45.212055+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Purebase amends extraction deal with US Mine; cancels 116M share option, adopts $20/ton royalty

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01, 9.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-23-039721
- JSON: https://secwatch.observer/filing/0001493152-23-039721.json
- Plain text: https://secwatch.observer/filing/0001493152-23-039721.txt

## Key facts
- Material Agreements
  Purebase Corp amended Second Amendment with US Mine, LLC valued at production royalty of $20.00 per ton (effective 2023-11-01).
  - Action: amendment
  - Counterparty: US Mine, LLC
  - Value: production royalty of $20.00 per ton
  - Effective: 2023-11-01
  source text: 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_url: https://www.sec.gov/Archives/edgar/data/1575858/000149315223039721/0001493152-23-039721-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.