Aterra Metals cuts Totora inferred resource estimate by 6.1%

• Aterra Metals cut inferred resources at Chile's Totora copper-gold project by 6.1% to 150,100,000 tonnes, effective October 27, 2026.
• The updated resource grades 0.52% copper equivalent, up from 0.51% in the September 24 estimate.
• The reduction mainly reflects the exclusion of isolated deep blocks at Totora-Algarrobilla under revised conceptual mining constraints.
• Contained copper fell 5.5% to 1,009 million pounds; contained gold declined 3% to 768,700 ounces.
• A supporting NI 43-101 technical report was filed, with a 13,000-meter drilling program planned to begin in November.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Aterra Metals Inc. published the original content used to generate this news brief via Newsfile (Ref. ID: 202611100715NEWSFILECNPR____20261110_323276_1) on November 10, 2026, and is solely responsible for the information contained therein.