Sierra Madre Gold and Silver and First Majestic Silver Announce Closing of Acquisition of the Del Toro Silver Mine for up to US$60M

About this update from Sierra Madre Gold & Silver Ltd.

Vancouver, British Columbia--(Newsfile Corp. - June 22, 2026) - Sierra Madre Gold and Silver Ltd. (TSXV: SM) (OTCQX: SMDRF) ("Sierra Madre") and First Majestic Silver Corp. (NYSE: AG) (TSX: AG) (FSE: FMV) ("First Majestic", and together with Sierra Madre, the "Parties") are pleased to announce that, pursuant to the share purchase agreement dated December 17, 2025 (the "Share Purchase Agreement") between Sierra Madre and First Majestic, Sierra Madre has completed its previously announced acquisition (the "Acquisition") of First Majestic Del Toro, S.A. de C.V. ("Subco"), a wholly-owned subsidiary of First Majestic incorporated under the laws of Mexico that holds a 100% interest in the Del Toro Silver Mine ("Del Toro"), as described in further detail in Sierra Madre's and First Majestic's news releases dated December 17, 2025 and Sierra Madre's management information circular dated March 24, 2026 (the "Circular"). All amounts herein are expressed in Canadian dollars, unless otherwise stated in U.S. dollars ("US$"). Alex Langer, Sierra Madre's President and Chief Executive Officer, commented, "The acquisition of Del Toro marks an important step for Sierra Madre Gold and Silver as we advance towards mid-tier silver production. A past-producing asset of this scale is a complementary addition to our Mexico-focused silver portfolio. With existing production infrastructure in place, our focus now turns to near-term resource expansion drilling, with approximately 30,000 metres planned. This program is expected to support an updated Mineral Resource estimate, followed by a potential mine restart, positioning the asset for a return to cash flow generation. We see significant upside at Del Toro, both from resource growth and restart potential. We are excited to get boots on the ground at Del Toro and wish to thank First Majestic for their continued support and trust." Under the terms of the Share Purchase Agreement, and as further described in the Circular, Sierra Madre acquired all of the issued and outstanding shares of Subco in exchange for a cash payment of US$20,000,000 and the issuance to First Majestic of 10,870,000 common shares of Sierra Madre (the "Common Shares") at a deemed price of $1.30 per Common Share, with each occurring at closing. In addition, within 18 months of closing the Acquisition, Sierra Madre must pay First Majestic US$10,000,000 in cash or,...

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