Dolly Varden Silver Corporation (TSX-V: DV) (NYSE American: DVS) (FSE: DVQ) is pleased to announce results from drilling on the Wolf Vein. A total of 32 drill holes were completed at the Wolf Vein in the 2025 program combining infill and vertical extension as well as southwest step-outs towards the projected position of the Central Valley Fault. High-grade silver mineralization was intersected in infill drill holes including DV25-435 which returned 467 g/t silver over 15.32 meters, including 1,309 g/t silver over 2.32 meters within the mineralized plunge.

A very significant finding during the 2025 program was the discovery of mineralization similar to that of the Torbrit silver deposit at a shallow depth in drilling across the Central Valley Fault (CVF). 518 g/t silver was intersected over 0.52 meters in drill hole DV25-470. A portion of the total 56,131 meter drilled in 2025 at the Company’s 100% owned Kitsault Valley Silver and Gold Project was drilled at the Wolf Vein to expand and infill along the plunge of high-grade silver mineralization to the southwest and test across the CVF once it was encountered.

Highlights from Wolf Vein Infill and Vertical expansion Drilling

“In addition to the successful infill and expansion of the Wolf Vein, the discovery of silver bearing mineralization similar to the Torbrit Deposit is a very significant step in connecting the Wolf Vein with Torbrit, located over one kilometer to the south. Connecting the two largest silver deposits in the Kitsault Valley trend has been a priority goal of our exploration team,” said Shawn Khunkhun, President and CEO of Dolly Varden Silver.

Two drill holes testing below the lower extent of the plunging silver zone intersected gold values from within the Wolf structure and vein extension down dip.

DV25-467: Follow up drilling targeting 60m down dip from DV25-446 (previously released September 2, 2025) intersected the vein grading 2.15 g/t Au (with 0.23% Pb and 5.19% Zn) over 3.77 meters, no significant silver

DV25-457: also tested below the main silver plunge zone and intersected 0.53 g/t Au and over 6.85 meters within the wider Wolf Structure alteration zone that graded 15 g/t silver and 0.22 g/t gold (with 0.48% lead and 0.49% zinc) over 26.85 meters.

* Intervals shown are core length. Estimated true widths vary depending on intersection angles and range from 55% to 65% of core lengths, further modelling of the new intersections is needed before true widths can be estimated. See results table for depths.

Figure 1. Plan of Wolf Vein mineralized zone (in red) highlighting all 2025 drilling completed with lithology on drill trace. Central Valley Fault inferred from drilling below sediment cap.

Wolf Vein and New Discovery

The Wolf Vein is hosted in Jurassic-age Hazelton Formation volcanic rocks and is interpreted as a structurally controlled, multi phased, epithermal vein and vein breccias that occur along a southwest plunging zone of wider, high-grade silver mineralization. Native silver, pyrargyrite, argentite and argentiferous galena are hosted in multiple phases of silica and iron carbonate veins and breccias. The presence of elevated gold below the high-grade silver system as well as increased lead and zinc values deeper on the plunge indicate a strengthening system at depth. The extention of the mineralization discovered underneath the sedimentary rock cap and the initial Wolf deposit that comes to surface has now been defined over a plunge extent of 1,100 meters at -45 degree plunge to the southwest.

Drilling in 2025 continued to expand the down plunge potential of the Wolf Vein towards the intercept point with the CVF. The deepest southwest holes drilled proximal to the CVF intercepted broken Wolf mineralization and off set blocks. A single drill hole, DV25-470, that was designed to test the possible projection of the Wolf Vein across the CVF instead intercepted Torbrit style exhalative and oxide layered mineralization associated with a 40 meter length (true width not known) quartz-pyrite vein with an average silver grade of 23 g/t similar to a vein within the Moose Lamb Fault near the Torbrit deposit. This important discovery will be followed during the 2026 exploration program.

Highlight from step out across CVF:

DV25-470: Torbrit Style: 518 g/t Ag, 0.19% Pb and 0.34% Zn over 0.52 meters, within a wider zone of mineralization and wall rock grading 66 g/t Ag, 0.12% Pb and 0.19% Zn over 12.45 meters

Figure 2. Longitudinal Section of Wolf Vein with mineralization envelope in red. All drilling shown with 2025 drilling labelled and lithology. Plunge of high-grade silver mineralization extended down dip below DV24-421 2024 step out.

Figure 3 Cross Section of Wolf Vein looking Northeast with mineralization envelope in red. 2025 drilling extended vertical extent of high-grade, wider silver mineralization to over 100 meters.

Figure 4. Core from drill hole DV25-470 exhibiting Torbrit style mineralization discovered across the southwest side of the Central Valley Fault. Native silver mineralization within a 0.52 centimetre interval starting at 490 meters depth grades 518 g/t Ag.

Table 1: Drill Hole Assays from Wolf Vein

*All intervals shown are core length. Estimated true widths vary depending on intersection angles and range from 55% to 65% of core lengths, further modelling of the new interpretation is needed before true widths can be calculated.

Table 2: Drill hole data for Wolf Vein holes reported in this release

Quality Assurance and Quality Control

The Company adheres to CIM Best Practices Guidelines for exploration related activities conducted on its property. Quality Assurance and Quality Control (QA/QC) procedures are overseen by the Qualified Person.

Dolly Varden QA/QC protocols are maintained through the insertion of certified reference material (standards), blanks and field duplicates within the sample stream. Drill core is cut in-half with a diamond saw, with one-half placed in sealed bags and shipped to the laboratory and the other half retained on site. Third party laboratory checks on 5% of the samples are carried out as well. Chain of custody is maintained from the drill to the submittal into the laboratory preparation facility.

Analytical testing was performed by ALS Canada Ltd. in North Vancouver, British Columbia. The entire sample is crushed to 70% minus 2mm (10 mesh), of which a 500 gram split is pulverized to minus 200 mesh. Multi-element analyses were determined by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) for 48 elements following a 4-acid digestion process. High grade silver testing was determined by Fire Assay with either an atomic absorption, or a gravimetric finish, depending on grade range. Au is also determined by fire assay on a 30g split with either atomic absorption, or gravimetric finish, depending on grade range. Metallic screen on a 1.0kg sample may be completed on high-grade gold samples.

Qualified Person

Rob van Egmond, P.Geo., Vice-President Exploration for Dolly Varden, the “Qualified Person” as defined by NI 43-101 has reviewed and approved the scientific and technical information contained in this news release. Rob van Egmond, P.Geo. is not independent of the Company in accordance with NI 43-101.

About Dolly Varden Silver Corporation

Dolly Varden Silver Corporation is a mineral exploration company focused on advancing its 100% held Kitsault Valley Project (which combines the Dolly Varden Project and the Homestake Ridge Project) located in the Golden Triangle of British Columbia, Canada, 25kms by road to tide water. Including the Kitsault Valley Project, the Company has consolidated approximately 100,000Ha of prospective tenure in the Golden Triangle with 5 past producing high-grade silver mines including Dolly Varden, Torbrit, Porter Idaho, Mountain Boy and Esperanza historic mines. The 163 sq. km. Kitsault Valley Project hosts the high-grade silver and gold resources of Dolly Varden and Homestake Ridge along with the past producing Dolly Varden and Torbrit silver mines. It is considered to be prospective for hosting further precious metal deposits, being on the same structural and stratigraphic belts that host numerous other, on-trend, high-grade deposits, such as Eskay Creek and Brucejack. The Kitsault Valley Project also contains the Big Bulk property which is prospective for porphyry and skarn style copper and gold mineralization, similar to other such deposits in the region (Red Mountain, KSM, Red Chris).