Silver Storm Demonstrates Resource Growth Potential at the C550 Zone, Expands the 2026 Drilling Campaign by 9,000 Metres

TORONTO, ON / ACCESS Newswire / May 21, 2026 / Silver Storm Mining Ltd. ("Silver Storm" or the "Company") (TSXV: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