Minaurum Resource Step-Out Drilling Returns: 3.40 m of 397 g/t AgEq at Europa Sur, 1.90 m of 323 g/t AgEq at Quintera, and 0.90 m of 1469 g/t AgEq at San Jose in Alamos Silver Project

Vancouver, British Columbia--(Newsfile Corp. - September 24, 2026) - Minaurum Silver Inc. (TSXV: MGG) (OTCQX: MMRGF) ("Minaurum" or the "Company") is pleased to report high-grade silver drill results from the Europa, Quintera, San Jose, and Promontorio Sur Vein Zones, as part of its ongoing Phase II, 50,000-metre resource-expansion drilling program at the Alamos Silver Project ("Alamos") in Sonora, Mexico.

Highlights include:

Europa Sur Vein Zone

1.60 m of 412 g/t silver equivalent ("AgEq") (314 g/t Ag, 0.41 g/t Au, 0.42% Cu, 0.41% Pb, 0.78% Zn) including 0.40 m of 708 g/t AgEq (409 g/t Ag, 1.51 g/t Au, 1.27% Cu, 0.82% Pb, 1.66% Zn) (Hole AL26-233)3.40 m of 397 g/t AgEq (237 g/t Ag, 0.20 g/t Au, 0.95% Cu, 0.80% Pb, 1.87% Zn) including 0.30 m of 1,433 g/t AgEq (1,135 g/t Ag, 0.23 g/t Au, 2.26% Cu, 1.42% Pb, 2.36% Zn) (Hole AL26-246)

Quintera Vein Zone

1.90 m of 323 g/t AgEq (263 g/t Ag, 0.02 g/t Au, 0.44% Cu, 0.27% Pb, 0.63% Zn) (Hole AL26-243)0.50 m of 1,559 g/t AgEq (1,460 g/t Ag, 0.04 g/t Au, 1.11% Cu, 0.01% Pb, 0.01% Zn) (Hole AL26-250)

San Jose Vein Zone

0.90 m of 1,469 g/t AgEq (1,103 g/t Ag, 0.26 g/t Au, 2.42% Cu, 2.80% Pb, 3.35% Zn) including 0.50 m of 2,425 g/t AgEq (1,910 g/t Ag, 0.43 g/t Au, 3.90% Cu, 1.60% Pb, 4.71% Zn) (Hole AL26-249)

Quintera - Travesia Vein Zones

Drilling at Quintera is successfully defining the vertical and horizontal extent of the high-grade silver shoot both below and along strike of the historical workings. Positioned 100 to 150 metres in the hanging wall (western side) of the Quintera vein zone, the Travesia vein zone allows a single drill hole to intersect both systems. Although Quintera was excluded from Minaurum's initial resource estimate (see news release dated January 28, 2026), it will be incorporated into the upcoming resource update.

In the Travesia vein zone, hole AL26-243 intersected 1.90 m of 323 g/t AgEq, including 0.50 m of 715 g/t AgEq (637 g/t Ag, 0.69% Cu, 0.30% Pb, 0.53% Zn). Hole AL26-236 and hole AL25-250 cut 0.65 m of 318 g/t AgEq (236 g/t Ag, 0.01 g/t Au, 0.84% Cu, 0.31% Pb, 0.10% Zn) and 0.50 m of 1,559 g/t AgEq, respectively in the Quintera vein zone. Hole AL26-250 cuts Quintera approximately 100 m down-dip from the 5.95 m of 1,117 g/t AgEq intersection (Hole AL26-215) (see news release dated July 8, 2026), while hole AL26-236 cut the Quintera zone about 80 m to the north and 20 m higher than the AL26-250 intercept (Table 1, Figures 2, 3, and 4).