Americas Gold and Silver drills 654.7 g/t Ag, 1.5% Cu over 20.5 m at Cosala

Toronto, Ontario--(Newsfile Corp. - September 17, 2026) - Americas Gold and Silver Corporation (TSX: USA) (NYSE American: USAS) ("Americas" or the "Company") a North American producer of silver and other critical minerals supporting artificial intelligence ("AI"), electrification, national security and advanced manufacturing, is pleased to announce high-grade Ag-Cu drill results from the Company's ongoing resource conversion drilling program at the Cosalá Complex. The assays released are a result of infill and step-out drilling conducted in 1H 2026 at the San Rafael Upper, 120 Upper and 120 Lower deposits with multiple holes at all three zones returning substantially higher silver grades than the currently modeled resource. These results represent significant upside potential to the future mine plan as they were not included in the Company's 2025 Mineral Resource and Reserve statement (see Americas news release dated March 30, 2026).

Paul Andre Huet, Chairman and CEO, commented: "The Cosalá operation continues to significantly exceed expectations, and I'd like to congratulate the entire team in Mexico for their commitment to mining excellence at all levels of the operation.

Resource conversion drilling at the San Rafael Upper and 120 zones is consistently averaging 2-3x the previously reported inferred Mineral Resource grades. Today's results are highlighted by hole SR583, which intersected a true thickness of 20.5 meters grading 654.7 g/t Ag and 1.5% Cu. It's important to note that this intercept is located just 30 meters outside of the 2025 inferred resource boundary and is expected to contribute new, high-grade silver ounces to the Cosalá mine plan. On a gram-meter basis these intercepts are comparable with some of the best silver intercept