Atlantico confirms gallium and rare earths in 114 samples at Novo Cruzeiro

Rare Earth Oxides Reach 2,806.7 ppm; Magnet Rare Earth Oxides Peak at 349.1 ppm and Gallium Oxide at 96.8 g/t

Vancouver, British Columbia--(Newsfile Corp. - September 11, 2026) - Atlantico Energy Metals Corp. (CSE: ATLA) (FSE: 1CJ1) (WKN: A42CRT) (the "Company " or " Atlantico ") reports gallium and rare earths in all 114 follow-up surface samples from the Company's flagship Novo Cruzeiro Project in Brazil's Lithium Valley, with laboratory results issued in March 2026. Exploration and technical work at Novo Cruzeiro have continued since the March 2026 laboratory reporting period, and subsequent updates will address the results of that work when available.

Gallium Confirmed in All 114 Follow-Up Samples

The highest calculated gallium oxide (Ga₂O₃) result was 96.8 g/t in sample NCZ-CR-0175.

The ten highest calculated Ga₂O₃ results ranged from 88.7 to 96.8 g/t

Ga₂O₃ values averaged 72.2 g/t , with a median of 74.6 g/t .

Gallium-based semiconductors play an important role in advanced defence and aerospace systems, including radar and drone communications, as well as satellite communications, 5G networks, smartphones, computers, and high-efficiency power supplies for AI data centres .

The U.S. Geological Survey, Mineral Commodity Summaries, February 2026 ( https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-gallium.pdf ), estimates that China accounted for approximately 99% of worldwide primary low-purity gallium production in 2025. This concentration highlights the importance of diversifying gallium supply chains for industries that depend on reliable access to the metal.

"Gallium in every one of these 114 samples is a very encouraging finding and reinforces the breadth of Novo Cruzeiro's potential as a multi-element critical minerals project," said Bonn Smith, President and CEO of Atlantico. "Equally encouraging is that rare earths used in powerful magnets make up a substan