Silver Storm Demonstrates Resource Growth Potential at the C550 Zone, Expands the 2026 Drilling Campaign BY 9,000 Metres
NEWS RELEASE
SILVER STORM DEMONSTRATES RESOURCE GROWTH POTENTIAL
AT THE C550 ZONE, EXPANDS THE 2026 DRILLING CAMPAIGN BY 9,000 METRES
Toronto, Ontario, May 21, 2026: Silver Storm Mining Ltd. (“Silver Storm” or the "Company") (TSX.V:
SVRS | OTCQX: SVRSF | FSE: SVR), is pleased to announce drill results from the diamond drilling
program at the Company’s 100% -owned La Parrilla Silver Mine Complex (“La Parrilla”) located in
Durango State, Mexico. Drill results in this release are from the C550 and C535 Zones within the past-
producing Quebradillas mine.
Key highlights include:
C550 Zone
• Hole IDP-QB-26-042 returned 160 g/t Ag.Eq(1,2) over 3.55 metres (“m”) (ETW(3) 2.5 m) and 165
g/t Ag.Eq over 1.90 m (ETW 1.2 m).
• Hole EDP-QB-26-004 returned 1,226 g/t Ag.Eq over 0.30 m ( ETW 0.2 m) and 144 g/t Ag.Eq
over 2.50 m (ETW 2.0 m).
• Hole IDP-QB-26-013 returned 167 g/t Ag.Eq over 1.80 m (ETW 1.0 m) and 622 g/t Ag.Eq over
0.70 m (ETW 0.4 m).
• Hole IDP-QB-26-020 returned 195 g/t Ag.Eq over 1.66 m (ETW 1.7 m) and 331 g/t Ag.Eq over
2.95 m (ETW 2.9 m).
• These drill results are consistent with historical channel sample results from the four mined
levels within the C550 Zone. On average, the channel sample widths varied from 1.0 m to 2.4
m, while grades varied between 182 g/t to 309 g/t Ag.Eq.
• The infill and exploration drill results at the C550 Zone demonstrated the potential to extend
the Indicated Resources by 75 m along strike and 90 m at depth, while the Inferred
Resources could potentially be extended by 50 m at depth.
C535 Zone
• Hole IDP-QB-26-021 returned 441 g/t Ag.Eq over 21.72 m (ETW 3.8 m), including 771 g/t
Ag.Eq over 9.27 m (ETW 1.6 m).
• Hole IDP-QB-26-041 returned 513 g/t Ag.Eq over 2.00 m (ETW 1.3 m) 45 m down-dip from hole
IDP-QB-26-021.
Greg McKenzie, President and CEO , commented: “We are pleased with the infill and exploration
drill results at the C550 Zone that demonstrated the potential to grow the La Parrilla Mineral Resource.
At the C535 Zone , drilling returned high -grade intercepts that support our plan to conduct further
exploration work in the near term.
Given the success of the 2026 La Parrilla drill campaign to date, the initial 6,000 m campaign
will be expanded with additional 9,000 m of drilling.”
C550 Zone
The C550 Zone is comprised of quartz -carbonate vein mineralization within two parallel fault zones
forming cymoid loops that strike east and dip 83 degrees to the south. The Zone has a known strike
length of approximately 315 m and a thickness of up to 5.5 m, with mineralization extending vertically
for 215 m. The mineralized structure pinches and swells, with replacement sulphide bodies developed
at its footwall and hanging wall.
Historical channel sampling conducted on the four levels mined at the C550 Zone indicated that the
mineralization widths varied from 1.0 m to 2.4 m on average, with average grades between 182 g/t to
309 g/t Ag.Eq (Figure 1, Table 2). The following composited weighted average grades of historical
channel samples(3) were calculated:
• 309 g/t Ag.Eq over a strike length of 81 m and average width of 1.9 m in the 2045 EL stope
• 301 g/t Ag.Eq over a strike length of 54 m and average width of 1.3 m in the 1998 EL stope
• 182 g/t Ag.Eq over a strike length of 98 m and average width of 1.0 m in the 1976 EL stope
• 234 g/t Ag.Eq over a strike length of 40 m and average width of 2.4 m in the 1925 EL stope
Figure 1: Longitudinal section of the C550 Zone (view to the south)
Table 1 summarizes the results from the 14 infill and exploration holes drilled at the C550 Zone . The
drill results are consistent with the results from the historical channel samples.
• Hole IDP-QB-26-042 returned 160 g/t Ag.Eq over 3.55 m (ETW 2.5 m) from the C550 Zone and
165 g/t Ag.Eq over 1.90 m (ETW 1.2 m) from the C550S Zone.
• Hole EDP-QB-26-004 returned 1,226 g/t Ag.Eq over 0.30 m ( ETW 0.2 m) from the C550 Zone
and 144 g/t Ag.Eq over 2.50 m ( ETW 2.0 m) from the C550N Zone 25 m below the 1925 EL
stope.
• Hole IDP-QB-26-013 returned 167 g/t Ag.Eq over 1.80 m (ETW 1.0 m) from the C550 Zone and
622 g/t Ag.Eq over 0.70 m (ETW 0.4 m) from the C550N Zone 22 m west of the 1925 EL stope.
• Hole IDP-QB-26-020 returned 195 g/t Ag.Eq over 1.66 m (ETW 1.7 m) and 331 g/t Ag.Eq over
2.95 m (ETW 2.9 m) from the C550 Zone.
New zones of mineralization were encountered before reaching the C550 Zone in two of the holes.
• Hole IDP-QB-26-023 returned 503 g/t Ag.Eq over 2.45 m (ETW 1.6 m).
• Hole EDP-QB-26-008 returned 144 g/t Ag.Eq over 2.15 m (ETW 1.5 m) and 278 g/t Ag.Eq over
4.45 m (ETW 3.1 m) in close proximity to the previously drilled hole PPM_Q_24_065 that returned
364 g/t Ag.Eq over 2.50 m (ETW 1.6 m) within a broader interval of 243 g/t Ag.Eq over 7.20 m
(ETW 4.6 m) 17 m prior to reaching the C550 Zone. Silver Storm plans to conduct further drilling
to the west of hole EDP-QB-26-008 to follow up on this new zone.
The infill and exploration results from the 14 holes drilled at the C550 Zone have demonstrated the
potential to extend the Indicated Resources by additional 75 m along strike and 90 m at depth,
while Inferred Resources could potentially be extended by additional 50 m at depth.
C535 Zone
The C535 Zone is comprised of moderately oxidized and faulted replacement sulphides that strike
north and dip 65 degrees to the east . It was identified through the underground exploration and infill
drilling program that targeted the C550 Zone (Figure 2).
• Hole IDP-QB-26-021 cut along the C535 Zone and returned 441 g/t Ag.Eq over 21.72 m (ETW
3.8 m), including 771 g/t Ag.Eq over 9.27 m (ETW 1.6 m).
• Hole IDP-QB-26-041 returned 513 g/t Ag.Eq over 2.00 m (ETW 1.3 m) 45 m down-dip from hole
IDP-QB-26-021.
Ongoing mine development subsequently cut through the C535 Zone at 1980 m elevation, allowing
Silver Storm’s geologists to conduct mapping and channel sampling. Further surface and underground
mapping and sampling are currently being conducted, and future drilling is being planned on the C535
Zone.
Silver Storm has two underground drill rigs in operation to advance the current drilling program more
rapidly. A total of 68 holes have been completed to date (~5,000 m).
For further information, the National Instrument 43-101 – Standards of Disclosure for Mineral Projects
(“NI 43-101”) Technical Report entitled "Independent Technical Report for the La Parrilla Silver Mine,
Durango State, Mexico" with an effective date of March 24, 2025 is available for review on SEDAR
(www.sedarplus.ca) and on the Company's website (www.silverstorm.ca).
Figure 2: Cross section view of the C550 and C535 Zones
Table 1(1) – Select assay intervals from the 2026 holes drilled at the C550 Zone; results from
previous drilling conducted by Silver Storm and historic assay results
Zone Hole From To Length
(m)
ETW(3)
(m)
Ag.Eq(2)
g/t
Ag
g/t
Au
g/t
Pb
%
Zn
%
C550N EDP-QB-26-004 65.65 66.50 0.85 0.60 287 50 0.81 1.16 7.69
C550N EDP-QB-26-004 72.60 75.10 2.50 2.05 144 68 0.03 1.61 2.20
C550 EDP-QB-26-004 94.35 94.65 0.30 0.23 1,226 815 0.17 14.80 5.05
C550N EDP-QB-26-005 100.00 100.60 0.60 0.42 185 114 0.14 2.28 0.69
C550 EDP-QB-26-005 120.60 121.45 0.85 0.43 308 190 0.07 1.00 4.88
NEW EDP-QB-26-008 70.95 73.10 2.15 1.52 144 59 0.10 1.06 2.89
NEW EDP-QB-26-008 84.00 88.45 4.45 3.15 278 52 0.20 0.76 10.28
C550 EDP-QB-26-009 70.90 71.55 0.65 0.50 184 125 0.13 0.83 1.63
C550N EDP-QB-26-009 89.45 90.30 0.85 0.65 272 177 0.04 0.74 4.10
C550 IDP-QB-26-009 51.25 52.80 1.55 1.53 140 50 0.25 1.28 2.27
C550 IDP-QB-26-013 34.40 36.20 1.80 1.03 167 42 0.97 0.12 2.22
C550N IDP-QB-26-013 42.00 42.70 0.70 0.40 622 610 0.03 0.15 0.35
C550S IDP-QB-26-014 3.10 4.50 1.40 1.32 190 68 0.47 2.26 1.96
C550S IDP-QB-26-015 9.40 9.80 0.40 0.20 471 106 0.18 2.67 15.65
C550S IDP-QB-26-015 16.00 16.65 0.65 0.32 415 151 0.12 2.91 10.35
C550N IDP-QB-26-020 8.47 9.65 1.18 1.18 187 27 0.00 0.18 8.28
C550N IDP-QB-26-020 16.64 17.89 1.25 1.25 167 73 0.01 0.33 4.53
C550N IDP-QB-26-020 22.10 22.50 0.40 0.40 244 139 0.24 2.14 2.21
C550 IDP-QB-26-020 29.54 31.20 1.66 1.66 195 31 0.02 0.20 8.41
C550 IDP-QB-26-020 35.25 38.20 2.95 2.95 331 174 0.11 3.58 3.92
C535 IDP-QB-26-021 0.00 21.72 21.72 3.77 441 254 0.12 5.98 2.90
including 0.00 9.27 9.27 1.61 771 492 0.13 10.38 2.97
C550 IDP-QB-26-021 30.00 30.41 0.41 0.31 258 111 0.08 3.02 4.15
C550N IDP-QB-26-022 23.75 35.40 11.65 8.92 188 76 0.16 2.19 2.84
NEW IDP-QB-26-023 8.10 10.55 2.45 1.57 503 328 0.48 3.02 3.86
NEW IDP-QB-26-023 23.95 24.45 0.50 0.32 403 142 0.17 8.02 4.46
C535 IDP-QB-26-041 37.30 39.30 2.00 1.29 513 19 0.01 0.10 26.00
C550S IDP-QB-26-042 5.45 7.35 1.90 1.22 165 77 0.48 1.54 0.88
C550 IDP-QB-26-042 24.00 27.55 3.55 2.51 160 108 0.13 1.12 0.97
PREVIOUS RESULTS
NEW PPM_Q_24_062 54.18 54.68 0.50 0.32 325 53 0.12 0.75 13.05
C550 PPM_Q_24_062 119.82 123.65 3.83 2.46 179 72 0.17 1.74 3.07
NEW PPM_Q_24_065 89.90 97.10 7.20 4.63 243 113 0.55 1.55 2.80
including 94.60 97.10 2.50 1.61 364 177 0.73 2.23 4.30
C550S PPM_Q_24_065 113.80 121.00 7.20 5.09 483 240 0.29 5.39 5.74
C550S including 113.80 117.95 4.15 2.93 732 379 0.49 8.45 7.38
NEW PPM_Q_24_066 78.04 78.54 0.50 0.35 392 182 0.20 5.01 4.81
C550S PPM_Q_24_066 97.88 98.38 0.50 0.35 131 63 0.01 1.67 1.82
C550S PPM_Q_24_066 98.88 99.32 0.44 0.31 202 81 0.06 2.28 3.69
C550 PPM_Q_24_066 151.82 152.27 0.45 0.32 149 34 0.24 0.31 4.71
HISTORICAL RESULTS
C550 SLP-TQ-12-04 154.70 155.65 0.95 0.67 144 0.08 108 0.16 1.42
C550 ILP-V-12-04 163.35 164.15 0.80 0.57 578 0.03 440 3.26 3.67
Table 2(1) – Historical channel sample results (4) – C550 Zone
Elevation Zone Channel TW(3) (m) Ag.Eq g/t Ag g/t Pb % Zn %
1925 C550 V550-1925-040 1.50 198 91 1.60 3.96
1925 C550 V550-1925-043 5.50 203 93 1.37 4.37
1925 C550 V550-1925-046 2.60 297 197 2.41 2.70
1925 C550 V550-1925-049 2.30 256 151 2.68 2.67
1925 C550 V550-1925-052 2.20 142 66 1.26 2.68
1925 C550 V550-1925-055 1.70 266 105 2.01 6.38
1925 C550 V550-1925-063 5.00 334 177 3.50 4.53
1925 C550 V550-1925-070 0.30 305 102 1.84 8.77
1925 C550 V550-1925-073 0.80 103 0 0.48 4.92
1976 C550 VN550-1976-099 2.30 397 254 4.11 3.15
1976 C550 VN550-1976-0102 0.70 67 42 0.81 0.45
1976 C550 VN550-1976-0105 0.70 125 58 1.68 1.72
1976 C550 VN550-1976-0108 0.50 37 0 0.68 1.23
1976 C550 VN550-1976-0111 1.10 161 80 1.30 2.87
1976 C550 VN550-1976-0114 0.70 83 44 0.72 1.30
1976 C550 VN550-1976-0117 2.40 167 76 2.00 2.65
1976 C550 VN550-1976-0119 1.10 142 55 1.64 2.84
1976 C550 VN550-1976-0121 1.90 167 50 0.41 5.76
1976 C550 VN550-1976-0125 0.80 171 135 0.84 1.01
1976 C550 VN550-1976-0128 0.60 205 56 1.24 6.57
1976 C550 VN550-1976-0131 1.00 202 66 1.82 5.23
1976 C550 VN550-1976-0134 0.60 194 184 0.34 0.18
1976 C550 VN550-1976-0139 0.70 202 66 1.42 5.65
1976 C550 VN550-1976-0142 1.20 159 98 1.57 1.54
1976 C550 VN550-1976-0146 0.70 204 112 2.05 2.68
1976 C550 VN550-1976-0149 2.40 238 78 1.43 6.92
1976 C550 VN550-1976-0152 0.70 245 108 1.99 5.12
1976 C550 VN550-1976-0156 1.80 173 79 1.59 3.25
1976 C550 VN550-1976-0160 0.70 232 180 2.55 0.02
1976 C550 VN550-1976-0163 2.00 256 115 1.99 5.31
1976 C550 VN550-1976-0166 0.40 245 46 0.66 9.82
1976 C550 VN550-1976-0168 1.00 306 68 0.52 12.03
1976 C550 VN550-1976-0170 0.60 351 92 1.55 12.05
1976 C550 VN550-1976-0173 0.90 23 0 0.26 0.94
1976 C550 VN550-1976-0177 0.60 301 128 1.74 7.26
1976 C550 VN550-1976-0180 0.50 106 32 0.43 3.47
1976 C550 VN550-1976-0182 0.90 18 4 0.27 0.44
1976 C550 VN550-1976-0185 0.70 244 142 1.90 3.32
1976 C550 VN550-1976-0188 0.60 141 28 0.41 5.53
1976 C550 VN550-1976-0191 1.80 135 66 1.17 2.39
1976 C550 VN550-1976-0195 0.80 134 76 1.54 1.41
1998 C550 V550-1998-0133 1.90 141 39 0.51 4.88
1998 C550 V550-1998-0136 0.70 290 152 2.96 4.14
1998 C550 V550-1998-0138 2.80 271 105 3.87 4.66
1998 C550 V550-1998-0140 1.20 515 229 6.77 7.79
1998 C550 V550-1998-0143 0.80 225 106 2.63 3.46
1998 C550 V550-1998-0146 1.80 238 96 2.30 5.00
1998 C550 V550-1998-0155 1.90 533 345 4.54 5.08
1998 C550 V550-1998-0157 1.00 382 295 2.66 1.73
1998 C550 V550-1998-0160 1.10 182 86 1.45 3.54
1998 C550 V550-1998-0163 1.00 187 143 1.45 0.78
1998 C550 V550-1998-0163 A 1.10 519 329 1.39 8.59
1998 C550 V550-1998-0163 B 1.30 422 208 1.25 9.95
1998 C550 V550-1998-0167 0.80 45 30 0.56 0.17
1998 C550 V550-1998-0170 0.70 275 182 2.02 2.77
1998 C550 V550-1998-0172 2.10 148 103 1.45 0.79
1998 C550 V550-1998-0174 0.90 83 6 0.73 3.30
1998 C550 V550-1998-0178 1.20 134 80 0.77 2.05
1998 C550 V550-1998-0182 1.40 454 303 2.83 4.93
1998 C550 V550-1998-0185 0.60 672 484 7.42 1.93
2045 C550 V550-2045-0117 3.50 461 197 5.32 8.24
2045 C550 V550-2045-0119 2.70 394 208 6.03 3.34
2045 C550 V550-2045-0122 0.90 100 100 0.00 0.00
2045 C550 V550-2045-0124 0.80 303 144 4.27 3.80
2045 C550 V550-2045-0127 0.70 173 56 0.85 5.31
2045 C550 V550-2045-0131 1.30 171 24 1.34 6.34
2045 C550 V550-2045-0135 2.30 172 80 1.83 2.93
2045 C550 V550-2045-0139 2.10 147 84 0.96 2.28
2045 C550 V550-2045-0143 0.90 150 80 1.25 2.36
2045 C550 V550-2045-0146 1.50 114 79 0.43 1.38
2045 C550 V550-2045-0148 2.10 244 113 2.18 4.59
2045 C550 V550-2045-0150 0.60 308 182 2.20 4.31
2045 C550 V550-2045-0153 2.80 1,068 842 6.72 4.71
2045 C550 V550-2045-0155 3.10 303 228 1.90 1.95
2045 C550 V550-2045-0159 2.30 530 342 4.12 5.53
2045 C550 V550-2045-0163 2.30 306 175 3.23 3.44
2045 C550 V550-2045-0165 2.40 391 241 2.70 5.06
2045 C550 V550-2045-0168 1.10 89 56 0.81 0.85
2045 C550 V550-2045-0171 1.80 562 363 5.82 4.28
2045 C550 V550-2045-0174 2.00 384 272 2.45 3.26
2045 C550 V550-2045-0177 2.80 665 468 3.45 6.69
2045 C550 V550-2045-0180 2.40 433 331 3.00 2.16
2045 C550 V550-2045-0183 1.80 333 263 1.86 1.67
2045 C550 V550-2045-0186 2.00 192 154 1.06 0.88
2045 C550 V550-2045-0189 0.90 312 182 3.11 3.51
2045 C550 V550-2045-0192 0.60 91 72 0.41 0.55
2045 C550 V550-2045-0195 1.80 92 50 0.66 1.50
2045 C550 V550-2045-0198 2.60 162 106 1.00 1.87
(1) The individual grades of the metals that were used as inputs into the metal equivalent Ag.Eq g/t are provided
in Tables 1 and 2.
(2) All results in this release are rounded. Assays are uncut and undiluted. Widths are core -lengths, not true
widths. Silver equivalent: Ag.Eq g/t was calculated using commodity prices of US$30.00 /oz Ag, US$2,500 /oz
Au, US$0.95 /lb Pb, and US$1.25 /lb Zn , applying metallurgical recoveries of 70.1% for silver and 82.8% for
gold in oxides and 79.6% for silver, 80.1% for gold, 74.7% for lead and 58.8% for zinc in sulphides. Metal
payable used was 99.6% for silver and 95% for gold in doré produced from oxides, and 95% for silver, gold,
and lead and 85% for zinc in concentrates produced from sulphides. Cut-off grades considered for oxide and
sulphide were 135 g/t Ag.Eq and 115 g/t Ag.Eq , respectively. The cut -off grades were based on 2017 costs
adjusted by the inflation rate and include sustaining costs.
(3) Estimated true widths (“ETW”) of mineralization have been calculated from core -lengths for drill core where
orientation of the zone is known; channel samples were taken perpendicular across the width of mineralization
and are considered true widths (“TW”).
(4) Weighted average grades were calculated over the mineralized widths of each channel across the stope
(Table 2, Figure 1).
Sample Analysis and QA/QC Program
Silver Storm uses a quality assurance/quality control (QA/QC) program that monitors the chain of
custody of samples and includes the insertion of blanks, duplicates, and reference standards in each
batch of samples sent for analysis. The drill core is phot ographed, logged, and cut in half, with one
half retained in a secured location for verification purposes and one half shipped for analysis. Sample
preparation (crushing and pulverizing) is performed at ALS Geochemistry, an independent ISO 9001:
2001 certified laboratory, in Zacatecas, Mexico and pulps are sent to ALS Geochemistry in Vancouver,
Canada for analysis. The entire sample is crushed to 70% passing -2 mm, and a riffle split of 250
grams is taken and pulverized to better than 85% passing 75 microns. Samples are analyzed for gold
using a standard fire assay with Atomic Absorption Spectrometry (AAS) (Au -AA23) from a 30 -gram
pulp. Gold assays greater than 10 g/t are re -analyzed on a 30 -gram pulp by fire assay with a
gravimetric finish (Au -GRA21). Samples are also analyzed using a 34 element inductively coupled
plasma (ICP) method with atomic emission spectroscopy (AES) on a pulp digested by four acids (ME-
ICP61). Overlimit sample values for silver (>100 g/t), lead (>1%), zinc (>1%), and copper (>1%) are
re-assayed using a four-acid digestion overlimit method with ICP -AES (ME-OG62). For silver values
greater than 1,500 g/t, samples are re-assayed using a fire assay with gravimetric finish on a 30-gram
pulp (Ag-GRA21). Samples with lead values over 20% are re-assayed using volumetric titration with
EDTA on a 1-gram pulp (Pb-VOL70). No QA/QC issues were noted with the results reported herein.
Qualified Person
The scientific and technical information in this document has been reviewed and approved by B ruce
Robbins, P.Geo. , Chief Geologist of the Company , engaged as an independent consultant to the
Company, a Qualified Person as defined by National Instrument 43-101 – Standards of Disclosure for
Mineral Projects.
About Silver Storm Mining Ltd.
Silver Storm Mining Ltd. holds advanced-stage silver projects located in Durango State, Mexico. Silver
Storm is committed to advancing toward a potential near -term restart of its 100% -owned La Parrilla
Silver Mine Complex, a prolific operation comprised of a 2,000 tpd mill and three underground mines.
The Company also holds a 100% interest in the San Diego Project which ranks among the largest
undeveloped silver projects in Mexico. For more information regarding the Company and its projects,
please visit our website at www.silverstorm.ca.
For additional information, please contact:
Greg McKenzie, President & CEO
Ph: +1 (416) 504-2024