William C. Howald, Certified Professional Geologist and a qualified personas as defined under NI43-101, has reviewed and approved the contents of this website

*Technical information relating to the Tonopah West Project is based on and derived from the technical report prepared for Blackrock in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects entitled “Updated Preliminary Economic Assessment of Mineral Resource Estimate – Tonopah-West Silver-Gold Project, Nye and Esmeralda Counties, Nevada, USA” effective March 25, 2026 and dated May 12, 2026, which includes an updated preliminary economic assessment on the Tonopah West Project with an effective date of March 25, 2026 (the “PEA”) and an updated mineral resource estimate on the Tonopah West Project with an effective date of January 4, 2026 (the “MRE”). The PEA is preliminary in nature and includes inferred mineral resources that are considered too speculative, geologically, to have the economic considerations applied to them to be categorized as mineral reserves. There is no certainty that the PEA will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Silver Equivalent (AgEq) Disclosure: In accordance with the NI 43-101 Technical Report filed May 12, 2026, silver equivalency is calculated using the following methodology: For non-Victor areas, the AgEq grade ratio used is 108:1 based on silver and gold prices of US$35/ounce and US$3,500/ounce, respectively, and recoveries for silver and gold of 88% and 95%, respectively. For the Victor area, the Silver Equivalent grade ratio used is 102:1 based on silver and gold prices of US$35/ounce and US$3,500/ounce, respectively, and recoveries for silver and gold of 96% and 98%, respectively. AgEq Factor= (Ag Price / Au Price) x (Ag Rec / Au Rec); g AgEq/t = g Ag/t + (g Au/t / AgEq Factor).