Anteros Metals pauses drilling at Seagull project

Executive Summary

• Anteros Metals provided an operational update on its Seagull Critical Minerals Project in Ontario after drilling encountered gas at approximately 877 meters on January 23, 2026.
• Drilling operations have been temporarily suspended and the hole secured while the company and operator Rift Minerals evaluate downhole conditions and prepare for gas sampling.
• Specialized sampling equipment has been mobilized to determine the nature, composition, and volume of the gas, with the original target depth for the drill hole set at approximately 1,350 meters.

Key Details

• Project Location & Scope: Seagull Critical Minerals Project, located ~80 km northeast of Thunder Bay, Ontario; evaluating platinum group elements, base metals, and naturally occurring gases (hydrogen and helium).
• Operator & Agreement: Drilling conducted by Rift Minerals Inc. under an option agreement announced Oct 9, 2025, which allows Anteros to earn up to a 49% interest in the project.
• Drilling Event: Gas encountered at ~877 meters depth in the early morning hours of Jan 23, 2026.
• Operational Response: Drilling temporarily suspended; hole secured; downhole conditions evaluated; specialized sampling equipment mobilized to site.
• Target Depth: Original planned target depth for the drill hole is ~1,350 meters.
• Historical Exploration: 1998-2012 work included airborne geophysical surveys and ~20,000 meters of diamond drilling reporting disseminated to semi-massive sulphide mineralization containing nickel, copper, and PGEs along the intrusion's basal contact.
• Recent Geophysics: 2024 ambient noise tomography (ANT) survey refined internal geometry of the Seagull intrusion and defined a deeper subsurface target; current drill program aims to provide the first subsurface evaluation of this ANT anomaly.
• Technical Oversight: Scientific and technical information reviewed and approved by Dr. Geoff Heggie, PGeo (Ontario), a Qualified Person under NI 43-101.