Defiance Silver intercepts high-grade silver at San Acacio; Lucita drilling pending

Vancouver, British Columbia--(Newsfile Corp. - September 9, 2026) - Defiance Silver Corp. (TSXV: DEF) (FSE: D4E) (WKN: A1JQW5) (" Defiance " or the "Company") is pleased to provide the results on the drilling campaign on the San Acacio resource drilling program on the Zacatecas project. The campaign was designed to confirm the extension of the known mineralized structures both laterally and vertically as well as to validate the current geological model that will be used for the upcoming Mineral Resource Estimate. This release contains results from holes: DDSA-26-89 through DDSA-26-92.

The drilling campaign has successfully completed 6,132m distributed in 21 holes in the resource area. The samples from holes DDSA-26-89 to DDSA-26-92 are reported in this release. The company is looking forward to integrating the assay results from the San Acacio drilling into the Mineral Resource Estimate, which is currently underway. The remaining 4,064 meters were used to test highly prospective targets in the Lucita South area, including a significant test of the high-grade multi-kilometre long Palenque vein system. The Lucita project forms part of the 4,217 Ha, Zacatecas Project. Defiance has released previous grassroots discovery results in NR dated August 9, 2022 , DDLU-22-10 intersected several different styles of mineralization, including grades up to 737 g/t Ag (from 398.00m to 398.53m), and in NR dated April 13, 2022 , drillhole DDSA-21-50 returned a downhole interval of 1.15m of 1,603.90 g/t Ag (from 116.25m to 117.4m), within a downhole interval of 3.33m grading 709.04 g/t Ag (from 115.82m to 119.15m). These previously reported drill holes were the first drill holes ever recorded on the Lucita South asset in the world-class Zacatecas district.

Highlights of Results

DDSA-26-89 returned 2.75m of 118.94 g/t Ag (from 42.25m to 45.00m) hosted within a larger interv