MGG.V · 2026-08-25 12:00:00

Minaurum Significantly Expands Quintera Vein Zone with 26 m of 369 g/t AgEq and Europa Sur Returns 3.4 m of 589 g/t AgEq Minaurum Silver Inc. (“Minaurum” or the “Company”) (TSXV: MGG) (OTCQX: MMRGF) is pleased to report continued high-grade drill results from the Europa, Quintera, and San Jose

Drill Results

NEWS RELEASE

MINAURUM SILVER INC.

FOR RELEASE: August 25, 2026 TRADING SYMBOL TSX.V: MGG

Minaurum Significantly Expands Quintera Vein Zone with

26 m of 369 g/t AgEq and Europa Sur Returns 3.4 m of 589 g/t AgEq

Minaurum Silver Inc. (“Minaurum” or the “Company”) (TSXV: MGG) (OTCQX: MMRGF)

is pleased to report continued high-grade drill results from the Europa, Quintera, and San Jose

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:

Quintera Vein Zone

• 26.30 m of 369 g/t silver equivalent (“AgEq”)

(306 g/t Ag, 0.03 g/t Au, 0.37% Cu, 0.73% Pb, 0.61% Zn)

including 0.30 m of 2,418 g/t AgEq

(2,220 g/t Ag, 0.10 g/t Au, 1.01% Cu, 2.22% Pb, 2.46% Zn) (Hole AL26-230)

Europa Sur Vein Zone

• 3.40 m of 589 g/t AgEq

(475 g/t Ag, 0.17 g/t Au, 0.53% Cu, 0.79% Pb, 1.59% Zn) (Hole AL26-224)

“The latest drill results continue to highlight the exceptional potential of the Alamos Silver

Project. At Quintera, we're intersecting wide zones of high -grade mineralization in the

footwall of the historic mine workings, strengthening our confidence in future resource

growth,” stated Darrell Rader, President and CEO of Minaurum Silver. “Meanwhile, Europa

Sur continues to return impressive high-grade silver intercepts across the main vein as well

as the associated hanging wall structures. We look forward to releasing additional results as

drilling progresses.”

Figure 1. Plan view showing locations of Travesia, Quintera, Promontorio , and Europa vein zones . Click to

enlarge.

Quintera - Travesia Vein Zones

AL26-230 intersected a significant width of high-grade silver, cutting 26.30 m of 369 g/t AgEq

(306 g/t Ag, 0.03 g/t Au, 0.37% Cu, 0.73% Pb, 0.61% Zn), in the Quintera vein outside of the old

mine workings and about 75 m north of the high -grade intersections of holes AL26-180 and

AL26-188. The AL26-230 intercept is situated about 130 m up dip and 30 m north of hole AL26-

215, which also returned high-grade silver: 5.95 m of 1,117 g/t AgEq (953 g/t Ag, 0.05 g/t Au,

1.22% Cu, 1.58% Pb, 0.41% Zn) (see news release s dated March 31 and July 8 , 2026). Hole

AL26-230D also returned a wide intersection: 9.35 m of 162 g/t AgEq (145 g/t Ag, 0.01 g/t Au,

0.14 % Cu, 0.08% Pb, 0.09% Zn).

At greater depth, hole AL26-223 intersected 2.55 m of 18 5 g/t AgEq (164 g/t Ag , 0.03 g/t Au,

0.15% Cu, 0.17% Pb, 0.11% Zn), cutting the Quintera vein zone slightly higher than and about

75 m north of the AL26-215 intersection. Hole AL26-230 stopped in the vein zone at 399 m due

to fractured rock. AL26-230D wedged off hole AL26-230 at 323 m to drill past the blockage and

cut the complete width of the vein zone. See Table 1, Figures 2 and 3.

Further drilling of the Quintera zone will include targeting down-plunge projections of southwest-

plunging shoots.

Table 1. Assay Highlights for Quintera Vein Zone. True widths are based on current interpretation of mineralized

structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC

Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb,

Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for

Pb, 75% for Zn.

Hole From

(m)

Interval

(m)

True

Width

(m)

g/t

AgEq

g/t

AL26-223

193.45 193.75 0.30 0.20 147 0.01 0.29 0.00 0.01 173

443.00 445.55 2.55 1.60 164 0.03 0.15 0.17 0.11 185

including

443.85 444.15 0.30 0.20 273 0.08 0.18 0.06 0.17 301

and

445.00 445.55 0.55 0.35 421 0.06 0.29 0.60 0.16 467

AL26-230

90.40 90.80 0.40 0.25 35 0.04 0.18 2.90 1.62 150

216.75 217.30 0.55 0.35 209 0.01 0.81 0.00 0.03 280

258.05 258.55 0.50 0.35 147 0.01 0.41 0.00 0.04 184

358.35 384.65 26.30 17.10 306 0.03 0.37 0.73 0.61 369

including

358.65 358.95 0.30 0.20 2220 0.10 1.01 2.22 2.46 2418

and

361.95 369.15 7.20 4.70 623 0.06 0.57 2.09 1.26 764

which includes

361.95 364.90 2.95 1.90 1180 0.10 0.84 4.05 1.59 1379

and

376.70 377.90 1.20 0.80 391 0.04 0.32 0.08 0.28 430

AL26-230D

377.60 386.95 9.35 6.10 145 0.01 0.14 0.08 0.09 162

including

377.60 382.00 4.40 2.85 226 0.02 0.20 0.13 0.13 250

which includes

381.50 382.00 0.50 0.35 902 0.06 0.69 0.54 0.10 979

Figure 2. Longitudinal section of Quintera vein zone, showing reported historic mine workings. Click to enlarge.

Figure 3. Cross section of Quintera vein zone, showing relationship of holes AL26-223, -230, -230D.

Europa – Europa Sur Vein Zones

Drilling in the Europa Sur extension of the Europa vein zone continues to return high-grade

results. Hole AL26-224 cut 3.40 m of 589 g/t AgEq, including 0.30 m of 1,189 g/t AgEq (988

g/t Ag, 0.32 g/t Au, 1.35% Cu, 0.89% Pb, 1.66% Zn), and 1.00 m of 1,185 g/t AgEq (951 g/t Ag,

0.23 g/t Au, 1.05% Cu, 1.55% Pb, 3.92% Zn). Hole AL26-225 intersected multiple narrower but

significant high-grade intervals in the Europa hanging wall veins, including 0.40 m of 1,569 g/t

AgEq (1,280 g/t Ag, 0.06 g/t Au, 1.55% Cu, 2.33% Pb, 4.40% Zn); 0.55 m of 901 g/t AgEq

(751 g/t Ag, 0.10 g/t Au, 1.02% Cu, 1.08% Pb, 1.37% Zn); 0.50 m of 1,004 g/t AgEq (564 g/t Ag,

0.18 g/t Au, 2.13% Cu, 3.32% Pb, 7.42% Zn); and 0.45 m of 2,069 g/t AgEq (950 g/t Ag, 1.64

g/t Au, 7.61% Cu, 9.76% Pb, 5.36% Zn). See Table 2, Figures 4-6.

The Europa vein inferred initial resource of 26.5 Moz AgEq of the 55. 2 Moz AgEq (34.8 Moz

Ag, 35.6 Koz Au, 114.77 Mlbs Pb, and 237.80 Mlbs Zn) does not include its southern extension

Europa Sur (see news releases dated January 28, and July 8, 2026). The drill results continue to

confirm the potential for significant resource expansion outside of the central Europa vein zone

and in the Europa Sur vein zone.

Further drilling is planned below and above hole AL26-225 intercept to target and further define

the potential of Europa Sur vein zone.

Figure 4. Longitudinal section of Europa-Europa Sur vein zone , showing locations of highlighted mineralized

intersections. Click to enlarge.

Figure 5. Cross section of Europa-Europa Sur vein zone , showing locations of highlighted mineralized

intersections around AL26-224. Click to enlarge.

Figure 6. Cross section of Europa-Europa Sur vein zone , showing locations of highlighted mineralized

intersections around AL26-225. Click to enlarge

Table 2. Assay Highlights for Europa Vein Zone. True widths are based on current interpretation of mineralized

structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC

Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb,

Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for

Pb, 75% for Zn.

Hole From

(m)

Interval

(m)

True

Width

(m)

g/t

AgEq

g/t

AL26-217

159.15 159.50 0.35 0.35 153 0.01 0.15 0.05 0.13 170

239.65 240.10 0.45 0.45 126 0.01 0.17 0.49 0.60 165

264.00 264.50 0.50 0.50 506 0.09 0.46 0.42 0.37 570

347.20 347.55 0.35 0.35 237 0.03 0.28 0.76 0.05 280

370.85 372.35 1.50 1.50 102 0.16 0.50 0.30 0.98 189

AL26-218 506.75 507.25 0.50 0.50 148 0.01 0.08 0.09 0.17 162

AL26-219 116.00 116.60 0.60 0.55 86 0.04 0.17 0.16 0.45 118

AL26-221 556.05 556.35 0.30 0.30 15 0.04 0.04 0.38 1.14 56

AL26-224

158.30 161.70 3.40 2.20 475 0.17 0.53 0.79 1.59 589

including

158.30 158.60 0.30 0.20 988 0.32 1.35 0.89 1.66 1189

and

159.50 161.40 1.90 1.25 659 0.24 0.66 1.12 2.44 817

which includes

160.40 161.40 1.00 0.65 951 0.23 1.05 1.55 3.92 1185

286.40 288.30 1.90 1.70 285 0.07 0.31 0.48 1.66 366

including

286.40 287.00 0.60 0.55 815 0.08 0.56 0.76 3.62 971

which includes

286.70 287.00 0.30 0.25 1325 0.13 0.82 0.84 4.79 1537

AL26-225

232.75 233.15 0.40 0.40 240 0.10 0.27 0.39 0.95 302

234.85 235.20 0.35 0.35 146 0.03 0.20 0.62 1.45 212

293.30 293.85 0.55 0.55 180 0.03 0.24 0.17 0.30 213

338.25 338.55 0.30 0.30 183 0.01 0.17 1.11 2.35 275

350.35 350.75 0.40 0.40 85 0.02 0.09 0.62 1.90 152

362.25 362.65 0.40 0.40 1280 0.06 1.55 2.33 4.40 1569

365.55 366.30 0.75 0.75 94 0.03 0.35 1.31 3.64 239

369.75 371.05 1.30 1.25 144 0.02 0.07 0.48 1.13 189

374.75 376.90 2.15 2.10 279 0.02 0.16 0.25 0.46 310

including

376.05 376.90 0.85 0.85 480 0.04 0.21 0.31 0.73 525

383.25 383.80 0.55 0.55 751 0.10 1.02 1.08 1.37 901

386.50 391.65 5.15 4.90 198 0.27 1.10 1.69 1.75 392

including

386.50 387.50 1.00 1.00 301 0.10 1.15 1.98 4.47 554

which includes

386.50 387.00 0.50 0.50 564 0.18 2.13 3.32 7.42 1004

and

389.75 391.65 1.90 1.85 346 0.64 2.29 3.39 2.18 718

including

390.85 391.30 0.45 0.45 950 1.64 7.61 9.76 5.36 2069

AL26-227 384.75 385.05 0.30 0.30 42.8 0.01 0.08 0.19 0.48 66

AL26-228

236.40 237.00 0.60 0.40 436 0.05 0.24 0.20 0.17 469

including

236.70 237.00 0.30 0.20 599 0.06 0.35 0.34 0.25 647

255.80 256.10 0.30 0.20 111 0.15 0.09 0.16 0.51 147

282.50 282.95 0.45 0.30 195 0.03 0.17 0.02 0.09 215

AL26-229 403.25 403.80 0.55 0.50 169 0.11 0.55 0.15 0.03 230

San Jose Vein Zone

Hole AL26-220 intersected moderate mineralization returning 4.75 m of 81 g/t AgEq including

0.70 m of 102 g/t AgEq (Table 3). Recent drilling intersected stronger mineralization across wider

a width of 8.5 m in hole AL26-200 returning 111 g/t AgEq (80 g/t Ag, 0.01 g/t Au, 0.05% Cu,

0.08% Pb, 0.21% Zn) including 1.55 m of 128 g/t AgEq (100 g/t Ag, 0.00 g/t Au, 0.03% Cu, 0.04%

Pb, 0.10% Zn) (see news release dated July 8, 2026).

San Jose continues to provide important geological information improving Minaurum's

understanding of the vein zone. With each hole, the Company refines its targeting and vectoring,

increasing confidence in the continuity of mineralization and guiding future drilling to maximize

resource growth potential.

Table 3. Assay Highlights for San Jose Vein Zone. True widths are based on current interpretation of mineralized

structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC

Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb,

Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for

Pb, 75% for Zn.

Hole From

(m)

Interval

(m)

True

Width

(m)

g/t

AgEq

g/t

AL26-216 215.90 216.40 0.50 0.30 32 0.00 0.02 0.03 0.04 35

AL26-220

46.15 46.60 0.45 0.30 3 0.01 1.28 0.00 0.02 114

199.40 204.15 4.75 3.35 64 0.02 0.15 0.03 0.07 81

including

199.40 200.10 0.70 0.50 95 0.01 0.06 0.02 0.07 102

and

203.80 204.15 0.35 0.25 77 0.05 0.38 0.07 0.18 120

AL26-222 177.85 178.15 0.30 0.28 57 0.01 0.10 0.08 0.05 70

AL26-226 213.50 213.80 0.30 0.30 71 0.00 0.02 0.02 0.01 74

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Minaurum Silver Inc. (MGG | TSX Venture Exchange; MMRGF | OTC; 78M 0 Frankfurt)

is an Americas -focused explorer concentrating on the high -grade 100% owned, production -

permitted Alamos silver project in southern Sonora, Mexico and the Lone Mountain CRD Project

in Nevada, USA. Minaurum is managed by one of the strongest technical and finance teams and

will continue its founders' legacy of creating shareholder value by acquiring and developing a

pipeline of Tier-One precious-and base metal projects.

ON BEHALF OF THE BOARD

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