Altamira Gold Intersects Additional Mineralized Porphyry outside the Maria Bonita Mineral Resource, Extending the Exploration Footprint within the Cajueiro District, Brazil

Vancouver, British Columbia--(Newsfile Corp. - May 12, 2026) - Altamira Gold Corp. (TSXV: ALTA) (FSE: T6UP) (OTCQB: EQTRF) ("Altamira" or the "Company") is pleased to report assay results from an exploration diamond drill hole outside the Maria Bonita mineral resource. Highlights: Scout drilling below the western edge of the Maria Bonita mineral resource has intersected a wide interval of porphyry mineralization including an interpreted preserved portion of an early phase of the porphyry.