Including 1,423,081 ounces of silver and 21,148 tonnes of zinc

Santacruz Silver Mining Ltd. (TSX-V: SCZ) (OTCQX: SCZMF) (FSE: 1SZ)  reports its Q2 2025 production results from its Bolivar mine, Porco mine, Caballo Blanco Group of mines and the San Lucas Group which includes the Reserva Mina and the San Lucas feed sourcing business, all located in Bolivia, and the Zimapan mine located in Mexico.

Q2 2025 Production Highlights:

Silver Equivalent Production: 3,547,054 silver equivalent ounces
Silver Production: 1,423,081 ounces
Zinc Production: 21,148 tonnes
Lead Production: 2,773 tonnes
Copper Production: 229 tonnes
Underground Development: 11,531 meters

Arturo Préstamo, Executive Chairman and CEO of Santacruz, commented, “Santacruz maintained robust and stable production levels during the second quarter of 2025, and, notably, San Lucas reaffirmed its strategic importance within the Company this quarter, successfully compensating for the slower production from the Bolivar mine. From Q1 2025 to Q2 2025, consolidated throughput remained stable, increasing slightly by 2%; however, consolidated silver equivalent production decreased by 4%, with silver ounces declining 11%. The reductions were primarily driven by flooding at the Bolivar mine, which was caused by an unexpected water inflow event that temporarily exceeded the system’s designed pumping capacity. As a result, access to the high-grade Pomabamba and Nane silver stopes at the Bolivar mine was suspended. The water overflow has now been resolved, and work on both stopes is gradually being restored to normal. Consolidated Zinc production was roughly unchanged, with a slight 2% decrease. Looking at the second half of the year, we remain focused on maximizing silver production and metallurgical recoveries across all our operations, an approach that is especially important in today’s favorable silver price environment.”

Production Summary – Total

Bolivar Mine 

Q2 2025 vs Q1 2025

Silver equivalent production decreased by 24% due to a 12% decline in tonnes processed; silver ounces declined by 28% and zinc by 19%. These reductions stem from a mid-May water inflow that flooded the Pomabamba South and Nané high grade areas, cutting access to planned stopes and lowering average head grades (silver -20%, zinc -7%). A modest gain in silver recoveries (+3%) only partially offset the impact of lower grades, while zinc recoveries were essentially flat (-1%). San Lucas’ flexible sourcing model has mitigated a significant portion of Bolivar’s production shortfall, helping sustain overall throughput and revenues until the affected areas are fully restored.

Q2 2025 vs Q2 2024

Silver equivalent production was 33% lower year over year driven by a 24% decline in material processed; silver output dropped by 29% and zinc by 38%. The water inflow event described above limited mining flexibility and access to higher grade stopes, which resulted in weaker head grades (silver -8%, zinc -17%). Weaker head grades were marginally offset by improved silver recoveries (+2%) while zinc recoveries remained stable (-1%). San Lucas’ flexible sourcing model has mitigated a significant portion of the Bolívar shortfall, helping sustain overall throughput and revenues until operations in the affected areas are fully restored.

Porco Mine

Q2 2025 vs Q1 2025

Material processed increased by 3%, while silver equivalent production remained roughly the same. Silver production declined 12% due to a 20% decrease in head grades that was offset by a 6% improvement in recoveries. Zinc production grew 4% with stable head grades (-1%) and recoveries (nil %). The offsetting movement between silver grades and recoveries limited the impact on overall silver equivalent ounces.

Q2 2025 vs Q2 2024

Material processed decreased by 4%, and silver equivalent production declined by 21%. Silver output was down 30% due to a 25% drop in silver head grades and a 3% decrease in recoveries. Zinc production fell 15% due to lower head grades (-11%) and recoveries remained consistent.

Caballo Blanco Group

Q2 2025 vs Q1 2025

Material processed increased by 12%, while silver equivalent production increased by 4%; the lower relative growth is due to reduced silver head grades (-17%) that were partially offset by slightly higher recoveries (1%). Silver production decreased 6% due to the grade variance. Zinc production increased 12% with stable grades and recoveries.

Q2 2025 vs Q2 2024

Results between quarters are not directly comparable because prior‑year figures included three mines, whereas current performance reflects only Colquechaquita and Tres Amigos following the reorganization in which Reserva mine production was 100% dedicated to the San Lucas processing facility starting in the second quarter of 2024. Material processed decreased by 31%, yet silver equivalent production declined by only 18%, indicating improved efficiency. Silver output decreased by 7% as materially higher silver head grades (+27%) and improved recoveries (+6%) were offset by lower tonnes processed; this, combined with the positive trend in silver prices, supported revenues. Zinc production decreased 25% due to lower throughput, partly mitigated by modest improvements in zinc head grades (+5%) and recoveries (+3%).

San Lucas Group

Q2 2025 vs Q1 2025

The San Lucas ore sourcing and trading business operates under a margin‑based business model that maintains contribution margins by aligning ore purchase costs with its metallurgical content. Material processed increased by 10% and silver equivalent production grew proportionally by 10%, reflecting stable metallurgical performance. Silver output rose by 8% with stable head grades (1%) and slightly lower recoveries (-2%). Zinc production increased 10% due to marginal improvements in head grades (2%) and stable recoveries (-1%). San Lucas also fulfilled its strategic role by supporting overall Group mill utilization and helping to offset part of the impact from the temporary water flood event at Bolívar.

Q2 2025 vs Q2 2024

The San Lucas ore sourcing and trading business operates under a margin‑based business model that maintains contribution margins by aligning ore purchase costs with its metallurgical content. Material processed increased 13%; however, silver equivalent production decreased 8% as lower silver head grades (-25%) more than offset a 3% improvement in recoveries. Silver output declined 12% on the same grade trend. Zinc production decreased by 7% due to lower head grades (-16%) and stable recoveries (-2%). Through flexible sourcing, San Lucas continued to preserve margins and provided strategic support to mitigate the temporary disruption at Bolivar during the period.

Zimapan Mine

Q2 2025 vs Q1 2025

Throughput was stable (nil%) while silver equivalent production decreased 6%. Silver output fell 10% due to a 7% drop in recoveries and slightly lower head grades (-3%). Zinc production was stable (+1%) with marginally higher head grades (+2%) offset by a slight decrease in recoveries (-2%).

Q2 2025 vs Q2 2024

Material processed increased by 7%, and silver equivalent production improved by 1%, as a higher zinc contribution offset slightly lower silver production. Silver production decreased 3% due to modestly lower head grades (-3%) and a decrease in recoveries (-6%). Zinc production increased by 10%, supported by a 7% rise in head grades.

Qualified Person

Garth Kirkham, P.Geo., an independent consultant to the Company, is a qualified person under NI 43-101 and has approved the scientific and technical information contained within this news release.

About Santacruz Silver Mining Ltd.

Santacruz Silver is engaged in the operation, acquisition, exploration, and development of mineral properties across Latin America. In Bolivia, the Company operates the Bolivar, Porco, and Caballo Blanco mining complexes, with Caballo Blanco comprising the Tres Amigos and Colquechaquita mines. The Reserva mine, whose production is provided to the San Lucas ore sourcing and trading business, is also located in Bolivia. Additionally, the Company oversees the Soracaya exploration project. In Mexico, Santacruz operates the Zimapán mine.