Minaurum Advances Underground Rehabilitation and Exploration at the Historic Promontorio Mine

Minaurum Silver Inc. (TSXV: MGG) (OTCQX: MMRGF) ("Minaurum" or the "Company") is pleased to report that ongoing underground rehabilitation efforts have resulted in safe access to a large section of the main haulage level and a 55-metre-deep internal shaft leading to lower levels of its historic Promontorio mine. These advancements support modern exploration efforts with preliminary channel sampling returning high-grade silver at the Promontorio Vein Zone within the high-grade Alamos Silver Project ("Alamos") in Sonora, Mexico. Underground channel sampling conducted across mineralized structures along the edges of historically mined stopes returned the following highlights: 0.30 m of 4,142 g/t silver equivalent ("AgEq") (Table 1) ( 3,860 g/t Ag , 0.42 g/t Au, 1.91% Cu, 1.58% Pb, 2.21% Zn ) (Sample 101307) 0.50 m of 704 g/t AgEq ( 275 g/t Ag, 1.23 g/t Au , 0.34% Cu, 0.39% Pb, 13.35% Zn ) (Sample 101277) 0.50 m of 733 g/t AgEq ( 282 g/t Ag, 2.67 g/t Au , 0.36% Cu, 0.52% Pb, 8.07% Zn ) (Sample 101276) 0.50 m of 480 g/t AgEq ( 386 g/t Ag , 0.12 g/t Au, 0.69% Cu, 0.27% Pb, 0.82% Zn) (Sample 101297) "Minaurum's 28.6 Moz AgEq inferred resource at Promontorio represents a significant portion of the Alamos Project's 55.2 Moz AgEq initial resource estimate. With more than 600 m of the haulage level and the 55 m-deep Balvanera shaft now securely accessible, we have begun detailed underground mapping and sampling that is already returning encouraging results," stated Darrell Rader, President and CEO. "We look forward to advancing rehabilitation, mapping and sampling across the historic Promontorio, Quintera and Minas Nuevas mines." Promontorio Mine History - Promontorio Vein Zone Resource and Potential The Promontorio mine produced an estimated 70 million ounces of silver historically with underground and surface mine workings traced for more than 1 km. Sampling and mapping of mine dumps at Promontorio revealed a 1 m-wide boulder of massive sulfide vein assaying 3,320 g/t Ag, 54.7 g/t Au, 25% Cu, 6.5% Pb, and 1.1% Zn, an indication of the high grades exploited by early miners (see news release dated November 15, 2022). The Promontorio vein zone accounts for 28.6 Moz AgEq of Minaurum's total inaugural inferred resource estimate of 55.2 Moz AgEq (34.8 Moz Ag, 35.6 Koz Au, 50.99 Mlbs Cu, 114.77 Mlbs Pb, and 237.80 Mlbs Zn) from the Europa, Promontorio, and Travesia vein zones. Geological mapping and drilling show potential for resource expansion at Promontorio at depth and along strike (see news release dated January 28, 2026). Historical maps and reports show the Promontorio Mine to consist of a haulage level extending approximately 1,200 m with crosscuts, shafts, and raises connecting to stopes and lower and upper levels. The Dios Padre and Azulacas shafts connect the northern part of the workings to the surface, while the internal Balvanera and Tirito shafts provide access to at least two lower levels and numerous crosscuts and stopes as indicated by historical lower levels from the haulage level maps (Figures 1 and 2). Rehabilitation Work Crews have secured access and installed lighting to the first 600 m of the Promontorio mine's haulage level and have installed pumps in the Tirito and Balvanera shafts. In the 55 m-deep Balvanera shaft, crews installed a marine ladder to 45 m with 2 rest stations and a bridge leading to an open lower level at 20 m. Levels at 12 and 45 m are blocked by backfill and flooded, respectively. Clean-up and ladder installation in the Tirito shaft is pending. Water lines lead from the shafts to a water tank situated outside the mine portal. The Company previously drilled and cased holes from the surface into the Promontorio mine near the Balvanera and Tirito shafts in order to run electricity, water, and compressed air for lighting, pumps, and ventilation (see news release dated November 22, 2022) (Figures 3-6). The accessible parts ...