Mr. Jim MacKenzie reports

VISCOUNT MINING ANNOUNCES MOBILIZATION OF ROSOR EXPLORATION FOR SILVER CLIFF AIRBORNE SURVEY PROGRAM

Rosor Exploration Corp. has commenced mobilization activities in preparation for the previously announced high-resolution airborne electromagnetic (EM) and magnetic survey at Viscount Mining Corp.'s flagship Silver Cliff project in Colorado.

Field operations are expected to commence during the week of May 18, 2026. The airborne survey program is anticipated to take approximately two weeks to complete, with Rosor expected to deliver its final interpreted report and data sets within approximately 40 days following completion of the survey.

The survey will utilize Rosor's advanced drone-based EM and magnetic surveying platform across the Silver Cliff property, with the objective of further refining drill targets associated with the company's emerging Passiflora gold-copper porphyry discovery.

The program is designed to complement the company's previous deep-penetrating Titan MT geophysical survey completed by Quantec Geoscience, which identified a large conductive anomaly interpreted to be consistent with a potential porphyry system at depth. The Rosor survey is expected to provide higher-resolution near-surface and intermediate-depth data that may assist in linking structural, alteration and conductive features throughout the broader mineralized system.

Mark Abrams, vice-president of exploration for Viscount, stated:

"We are pleased to see Rosor commencing mobilization for this important next phase of exploration at Silver Cliff. The integration of this high-resolution airborne survey with our existing geophysical and drilling database is expected to significantly enhance our understanding of the broader Passiflora system and assist in refining future drill targeting."

The airborne survey follows Viscount's previously announced drill results from hole PF-23-03A at the Passiflora target, which intersected 843.9 metres of continuous gold-copper mineralization and confirmed the presence of a large hydrothermal system that remains open in multiple directions.

Qualified persons

The scientific and technical information contained in this news release has been reviewed and approved by Harald Hoegberg, CPG, an independent consulting geologist who is a qualified person (QP) as such term is defined under National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

About Viscount Mining Corp.

Viscount Mining is a project generator and mineral exploration company focused on advancing high-quality silver, gold and copper assets in the Western United States. The company's portfolio includes the Silver Cliff silver project in Colorado and the Cherry Creek multimetal district in Nevada.

Silver Cliff project -- Colorado

Silver Cliff is in the historic Hardscrabble silver district and comprises 96 lode claims with year-round paved access and established local infrastructure. The project covers a large volcanic caldera system recognized for its silver, gold and base-metal potential.

The property includes two principal zones of focus:

• Kate deposit (silver resource area): The Kate hosts a National Instrument 43-101-compliant near-surface silver resource published by an independent QP (details: measured and indicated and inferred silver resources were reported in the company's technical disclosure; investors are encouraged to review the full technical report available on SEDAR+ for tonnage, grade and methodology).
• Passiflora porphyry target: Historical and modern drilling indicates extensive hydrothermal alteration consistent with a large porphyry system. Recent drilling by Viscount (hole PF-23-03A) intersected 843.9 metres of continuous gold-copper mineralization, which the company interprets as being on the periphery of a potentially larger intrusive centre. Mineralization remains open in multiple directions.

Cherry Creek project -- Nevada

Cherry Creek covers 219 unpatented and 19 patented claims in a well-known historic mining district approximately 50 miles north of Ely. The property includes more than 20 past-producing mines and hosts several styles of mineralization, including silver-gold veins, carbonate-replacement (CRD) zones, jasperoids and porphyry-related alteration. The district is 100 per cent controlled by Viscount and is considered highly prospective for multimetal discoveries within the broader mineralized system.

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