Goldmining renews Colider exploration claim

Executive Summary

• Goldmining Inc. has been granted a renewal of exploration claim 866032/2008 (the Colider project) by the Brazilian National Mining Agency (ANM), effective October 30, 2025.
• The renewal is valid for three years, during which the company must prepare and present a final exploration report.
• The Colider project is a 10,000-hectare exploration claim in Mato Grosso state, Brazil, located within the Alta Floresta gold belt.

Key Details

• Concession Details: The renewed claim covers 10,000 hectares (100 square kilometers) and was originally obtained by a wholly owned subsidiary in 2011.
• Legal History: The company initially applied for renewal in 2013; after an initial denial and appeal, the claim has now been restored to active exploration status.
• Location: The project is situated in Mato Grosso state, central-west Brazil, within the Alta Floresta gold belt, an area known for extensive alluvial gold mining.
• Historic Exploration Data:
  • Western Mining Corp. conducted systematic exploration in the 1990s, including geological mapping, geophysical surveys (magnetics and induced polarization), and soil sampling.
  • A total of 29 Reverse Circulation (RC) holes were drilled for 1,847 meters.
  • Systematic grid soil sampling covered approximately 13% of the concession, showing elevated gold and copper associated with a large discrete magnetic high anomaly.
  • Historic surface rock grab samples exhibited gossan and sulphide mineralization overprinting granitoid intrusive rocks.
  • Historic assay values reported up to 11.2 grams per tonne gold, along with anomalous copper, lead, molybdenum, and zinc.
• Current Activities: The company is currently compiling, validating, and interpreting historic exploration results, including basic quality assurance of original assay certificates. Initial plans include systematic compilation of historic data sets and initial ground-truthing fieldwork.
• Portfolio Context: The Colider project is part of Goldmining's Brazil exploration portfolio, which also includes the Batistao gold project located 55 km to the northeast (comprising one exploration permit of 5,107 hectares).

Notable Quotes

• "We're pleased to have added the Colider concession to our Brazil exploration portfolio of highly prospective gold (plus or minus copper) projects. Colider lies within the emerging and underexplored Alta Floresta gold belt in Mato Grosso state, and our initial analysis of the historic data sets suggests that Colider is highly prospective for bedrock gold and copper mineralization. Colider provides additional optionality in an already extensive portfolio of prospective properties in central Brazil, and we look forward to the compilation and validation of historic exploration results, followed by planning for the first stages of systematic exploration data sets across the property." — Alastair Still, Chief Executive Officer