Vancouver, BC – TheNewswire - November 21, 2025 – Vanguard Mining Corp. ("Vanguard" or the "Company") (CSE: UUU | OTC: UUUFF | Frankfurt: SL51) is pleased to announce drilling has now surpassed 500 metres of drilling at its 100%-owned Redonda Copper-Molybdenum Project (the “Project”), located in the Vancouver Mining Division near Campbell River, British Columbia.

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Figure 1: 2024 Airborne Magnetics (RTP) with lineaments – See release

To execute the program, Vanguard engaged Paradigm Drilling Ltd. (“Paradigm Drilling”), which will deploy a Boyles T-75 hydraulic, track-mounted diamond drill equipped with NQ tooling and capable of testing targets to depths exceeding 600 metres.

David Greenway, CEO of Vanguard Mining Corp., commented: “Drilling is progressing well at Redonda, and samples have now been shipped for analysis. Early indications continue to reinforce the potential scale of the mineralized system. This year’s program builds on previous work, including a 174-metre interval from surface and strong surface sampling averaging approximately 0.5% CuEq, which together provide clear vectors for deeper targeting. British Columbia remains a world-class jurisdiction for responsible resource development, and the launch of Canada’s Major Projects Office underscores the country’s commitment to efficiently advancing critical mineral projects. Our focus for the 2025 season is straightforward: expand on the encouraging 2023–2024 results and begin defining the true extent of the Redonda system at depth.”

The Drill Program has been guided by targets and structural corridors interpreted from the previously announced Precision GeoSurveys, Inc. (“Precision”) airborne geophysical survey, integrated with results from recent drilling and surface sampling. Recent drilling at Redonda returned intervals of up to 142.6 metres (467.8 feet) grading 0.279% Cu and 0.0281% Mo, while surface sampling yielded near-surface intervals ranging from 3.1 metres (10.17 feet) to 48 metres (157.4 feet) grading 0.529% CuEq (See News Release dated January 25, 2024). 2023 drilling bottomed on mineralization at less than 200 m.

Copper equivalent (“CuEq”) values are calculated using metal prices and recovery assumptions disclosed in the Company’s news release dated January 25, 2024.

Core logging for 2025 is being conducted by an independent, certified senior geologist. Half the expected drill core samples have been submitted to ALS Laboratories with blanks and standards under a strict chain-of-custody protocol.

Vanguard further announces the Company has made it a priority to work in close collaboration with the Klahoose First Nation (“Klahoose”) throughout the campaign, prioritizing local labour, training opportunities, and the use of Klahoose-affiliated service providers for logistics where practicable. The Company will maintain ongoing engagement throughout the program, including regular updates on work plans and timelines, incorporation of feedback into field operations, and adherence to cultural heritage protocols and environmental best practices within Klahoose Traditional Territory. Vanguard will coordinate site access, safety, and environmental monitoring with Klahoose representatives and will continue to explore additional opportunities for additional capacity-building and economic-participation opportunities as the program advances.

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Figure 2. Drilling Underway at Redonda Copper-Molybdenum Project

2025 Program Scope and Targeting

The Company is currently permitted for up to 10 drill sites and is evaluating an aggressive 2025 program that includes detailed geological mapping of brecciation trends and deeper drilling below 500 metres within the known potassic core. Mineralized zones remain open to the north and south, with potential extensions along an old road system ~1 kilometre to the northwest. To the south, mineralization is interpreted to plunge beneath the Coast Plutonic Complex, where follow-up airborne geophysics and subsequent drilling are warranted. In addition, extensive iron skarns identified on the east side of Redonda Island may represent part of a larger magmatic-hydrothermal system at depth, reinforcing the Project’s district-scale potential.

Program Highlights

• Mobilization underway for 2025 diamond drilling at Redonda (2,746.46 ha), near Campbell River, BC. 

• Prior work indicates mineralization open north–south, with a possible NW extension (~1 km) along an old road system. 

• Southern plunge beneath the Coast Plutonic Complex to be assessed with additional geophysics and drilling. 

• Iron-skarn occurrences on east Redonda Island support a district-scale magmatic-hydrothermal model. 

• Ongoing collaboration with the Klahoose First Nation for labour and logistics. 

The Company will provide updates on drill start, meterage, and subsequent assay results as they become available.

Target Generation from 2024 Airborne Geophysics

Drill hole locations have been selected using a combination of historical datasets and results from the Company’s late-2024 airborne geophysical survey, which integrated total magnetic intensity, gradient magnetics, and radiometrics. The survey delineates strong correlations with mapped geological domains, including a northeast–southwest–trending fault system displaying right-lateral offset and several circular magnetic lows interpreted as potential intrusive centres. Radiometric potassium anomalies define arcuate potassic-alteration zones—key vectors in porphyry copper-molybdenum systems—focusing priority targets both adjacent to historical drilling and along newly defined structural corridors. The full airborne data package, including GeoTIFF magnetic and radiometric maps, will be made available on the Company’s website for reference only and should not be relied upon for investment decisions to illustrate the scale and quality of the Redonda exploration opportunity.

About Redonda

The Redonda Project comprises nine mineral claims totaling 2,746.46 ha, located approximately 40 km northeast of Campbell River, British Columbia. The property is accessible year-round via scheduled barge service from Campbell River (e.g., MarineLink or other contract barges), with on-site access provided by 5 km of recently upgraded logging road from Redonda Bay. Active forestry maintains an extensive network of forest service roads across the claims. Field work in 2021 was conducted under a Letter of Support from the Klahoose First Nation within their Traditional Territory, together with a Free Use Permit, Drill Permit, and IP Exemption issued by the Ministry of Energy, Mines and Low Carbon Innovation (EMLI). Consultation with the Homalko First Nation has concluded, and a permit for additional drill sites has been issued.

Redonda lies within the Coast Suture Zone between the Wrangellia Terrane and the Coast Plutonic Complex. Early Cretaceous dioritic intrusions of the Coast Plutonic Complex are cut by at least three later intrusive phases: (i) a quartz plug; (ii) a wide, hornblende-rich dike locally brecciated over ~600 metres of exposed length; and (iii) several smaller feldspar dikes near the southwestern margin of the hornblende body. Copper-molybdenum mineralization is most concentrated along the hornblende dike, particularly within brecciated zones. The geological setting shares several characteristics with nearby porphyry systems, including the OKover copper-molybdenum deposit located ~34 km to the southeast (north of Powell River) and the Gambier Copper deposit in Howe Sound.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by J. T. Shearer, M.Sc., D.I.C., P.Geo. (BC & Ontario), a consulting geologist who is a “Qualified Person” as defined under National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43- 101”). Mr. Shearer is not at arm’s length with Vanguard Mining.

About Vanguard Mining Corp.

Vanguard Mining Corp. is a Canadian mineral exploration company focused on the discovery and development of high-value strategic minerals. The Company is currently advancing exploration projects in Argentina, Canada and Paraguay, with a focus on identifying and developing assets critical to the global energy transition. Vanguard is committed to responsible exploration and value creation through the acquisition and advancement of highly prospective uranium properties.

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On Behalf of the Board of Directors

“David Greenway”

David Greenway, CEO

For further information, please contact:

Vanguard Mining Corp.
Brent Rusin
Phone: +1 672-533-0348
E-Mail: brent@vanguardminingcorp.com
Website: vanguardminingcorp.com

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

Disclaimer for Forward-Looking Information

Certain statements in this news release constitute “forward-looking statements” or “forward-looking information” (collectively, “forward-looking statements”) within the meaning of applicable securities laws. Forward-looking statements are statements that are not historical facts and include, but are not limited to, statements regarding beliefs, plans, expectations, intentions, objectives, strategies, future performance, and anticipated events or results. Forward-looking statements are based on management’s current expectations, estimates, and assumptions, which may prove to be incorrect, and are subject to known and unknown risks and uncertainties that could cause actual results, performance, or developments to differ materially from those expressed or implied. There can be no assurance that the events anticipated in forward-looking statements will occur, or, if they do, what benefits Vanguard will obtain from them. Factors that could cause actual results to differ materially include, among others, exploration results, availability of financing, commodity prices, permitting and regulatory risks, operating risks, and other risks described in the Company’s public disclosure. Forward-looking statements in this release are made as of the date hereof, and Vanguard undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by applicable securities laws. Readers are cautioned not to place undue reliance on forward-looking statements.

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