Atlantico identifies rare earth anomalies over 19.4 km at Novo Cruzeiro

Thirteen Samples Exceed 1,000 ppm TREO, with Magnet Rare Earth Oxides Consistently Representing 18.8% to 21.5% of TREO

Vancouver, British Columbia--(Newsfile Corp. - August 20, 2026) - Atlantico Energy Metals Corp. (CSE: ATLA) (FSE: 1CJ1) (WKN: A42CRT) (the " Company " or " Atlantico ") reports findings from a property-scale ioGAS interpretation completed in January 2026 using its previously reported 231-sample first-pass dataset. The interpretation identified multiple anomalous rare earth element ("REE") response areas across the northeast, southeast, south and east of Novo Cruzeiro.

The 231-sample first-pass program provided broad reconnaissance coverage across the more than 240-square-kilometre Novo Cruzeiro property, including 170 stream-sediment samples collected at an average density of approximately one sample per 1.45 square kilometres.

Thirty-seven of 170 stream-sediment samples returned more than 500 ppm total rare earth oxides ("TREO"), and 13 returned more than 1,000 ppm, including a peak value of 1,427.05 ppm. The maximum straight-line separation between the 13 higher-TREO sample locations is approximately 19.4 kilometres, calculated from the reported SIRGAS 2000 / UTM Zone 24S coordinates.

Each of the 13 higher-TREO samples contains all four oxides included in Atlantico's magnet rare earth oxide ("MREO") calculation: neodymium, praseodymium, dysprosium and terbium oxides. Their consistent presence across all 13 higher-TREO samples is strategically relevant because these magnet rare earths are used in high-performance permanent magnets for electric vehicles, wind turbines, robotics, advanced electronics and defence systems.

Figure 1. Property-scale TREO, neodymium, praseodymium, dysprosium and terbium contour maps from the January 2026 ioGAS interpretation. The contours are January 2026 interpretation out