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Vancouver, British Columbia--(Newsfile Corp. - May 20, 2026) - Viscount Mining Corp. (TSXV: VML) (OTCQX: VLMGF) ("Viscount" or the "Company") is pleased to announce that Rosor Exploration Corp. ("Rosor") has commenced mobilization activities in preparation for the previously announced high-resolution airborne electromagnetic ("EM") and magnetic survey at the Company'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 datasets 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 ("NI 43-101").

About Viscount Mining (TSXV: VML) (OTCQX: VLMGF)

Viscount Mining Corp. 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 multi-metal 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 NI 43-101 compliant near-surface silver resource published by an independent QP (details: Measured & 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% controlled by Viscount and is considered highly prospective for multi-metal discoveries within the broader mineralized system.

For additional information regarding the above noted property and other corporate information, please visit the Company's website at www.viscountmining.com

ON BEHALF OF THE BOARD OF DIRECTORS

"Jim MacKenzie"

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This news release includes certain statements that may be deemed "forward-looking statements" within the meaning of applicable Canadian securities legislation. Forward-looking statements include, but are not limited to, statements with respect to Viscount Mining's operations, exploration and development plans, expansion plans, estimates, expectations, forecasts, objectives, predictions and projections of the future. Specifically, this news release contains forward looking statements with respect to the actual size of the anomaly, feasibility, grade of mineralization and the content of the mineralization. Generally, forward-looking statements can be identified by the forward-looking terminology such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled", "estimates", "projects", "intends", "anticipates", or "does not anticipate", or "believes", or "variations of such words and phrases or state that certain actions, events or results "may", "can", "could", "would", "might", or "will" be taken", "occur" or "be achieved". Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of Viscount Mining to be materially different from those expressed or implied by such forward-looking statements, including but not limited to: risks related to the exploration and development and operation of Viscount Mining's projects, the actual results of current exploration, development activities, conclusions of economic evaluations, changes in project parameters as plans continue to be refined, future precious metals prices, as well as those factors discussed in the sections relating to risk factors of our business filed in Viscount Mining's required securities filings on SEDARPlus. Although Viscount Mining has attempted to identify important factors that could cause results to differ materially from those contained in forward-looking statements, there may be other factors that cause results to be materially different from those anticipated, described, estimated, assessed or intended.

There can be no assurance that any forward-looking statements will prove accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. Viscount Mining does not undertake to update any forward-looking statements that are incorporated by reference herein, except in accordance with applicable securities laws.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/297905