(TheNewswire)

Vancouver, BC – March 27, 2026 –TheNewswire - Vanguard Mining Corp.("Vanguard" or the "Company") (UUU: CSE |UUUFF: OTCID | SL51: Frankfurt) is pleased toannounce the completion and filing of its first National Instrument43-101 (“NI43-101”) Technical Report for the Company’s100%-owned Redonda Copper-Molybdenum Project (the “Project”),located in the Vancouver Mining Division near Campbell River, BritishColumbia.

This milestone report validates the scale andgeological potential of the Redonda Project and underscores theCompany’s commitment to best practices, technical rigor, andtransparency in advancing its exploration activities. The report hasbeen prepared in accordance with the Canadian SecuritiesAdministrators’ NI 43-101 Standards of Disclosure for MineralProjects.

The report incorporates results from the Company’s2025–2026 drill campaign, updated geophysical data, and historicaldrilling completed by Teck Resources Ltd. in 1979.

“This report represents a majormilestone for Vanguard,” said David Greenway, CEO. “We now haveindependent confirmation of a large-scale copper-molybdenum system atRedonda, supported by both historical and modern drilling.Importantly, mineralization is strong, consistent, and remains open inmultiple directions and may represent the upper portion of a muchlarger porphyry system. With a clear exploration roadmap and definedtargets, we believe Redonda has the potential to evolve into asignificant discovery in British Columbia.”

Project Location & GeologicalSetting

The Redonda Project comprises nine mineral claimstotaling 2,746.46 hectares on West Redonda Island, approximately 40 kmnortheast of Campbell River. The property is accessible year-round viabarge and supported by established logging infrastructure.

Geologically, Redonda lies within the Coast Suture Zonebetween the Wrangellia Terrane and the Coast Plutonic Complex.Copper-molybdenum mineralization is associated with a hornblendeporphyry dike and breccia zones, consistent with porphyry-stylesystems observed elsewhere in southwestern British Columbia.

Figure 1:
Location of the Redonda Project, Vancouver Mining Division, British
Columbia.

Drilling & Exploration
Overview

The report integrates multiple exploration phases,
including historical drilling, re-assaying of legacy core, and
Vanguard’s 2023–2026 drill programs, along with airborne
geophysical surveys.

Key Highlights from the NI 43-101
Report

• Large-Scale Mineralized SystemDefined: Drilling outlines a mineralizedfootprint exceeding approximately 600 metres in strike, 500 metres inwidth, and 300 metres vertically.
  
• Broad Intervals of Copper-MolybdenumMineralization: Multiple drill holes intersectedlong intervals of mineralization, including zones exceeding 100 metresin length with consistent grades.
  
• Near-Surface MineralizationIdentified: Several drill holes encounteredmineralization beginning near surface, supporting favorableexploration geometry.
  
• Geological Model Confirmed andStrengthened: Recent drilling supports amulti-phase intrusive and breccia-hosted porphyry system with amineralized core.
  
• Expansion Potential RemainsOpen: Mineralization remains open at depth andalong strike, indicating potential for a larger underlying system.
  

Disclaimer – Drill Compilation: Management cautions
that the presented drill sample results are historical in nature, and
Vanguard has not undertaken any independent investigation of the
sampling, nor has it independently analyzed the results of previous
exploration work to verify the results. Vanguard considers these
results relevant for planning future exploration programs. All drill
intercepts represent drilled lengths, and insufficient information
exists to determine true widths. The technical information is derived
from publicly available government sources.

Disclaimer – Initial Exploration Target: The
potential quantity and grades are conceptual in nature. There has been
insufficient exploration drilling to define a mineral resource, and it
is uncertain whether further exploration will result in the
delineation of a mineral resource.

Technical Report & Exploration
Strategy

The report recommends a two-phase exploration
program:

Phase 1:

Induced Polarization (IP) geophysical survey, detailed
mapping, and geochemical sampling to refine drill targets.

Phase 2:

Approximately 2,800 metres of diamond drilling across
seven holes to test priority targets and expand mineralization.

Figure 2:
Diagrammatic Illustration of Conceptual model illustrating the
linkages between porphyry and high/low sulphidation epithermal
mineralization (from Corbett, 2017)

Conceptual Geological Model

The Redonda Project is interpreted within the context
of a porphyry-epithermal system, as illustrated in the conceptual
model of Steve Corbett (2017). This model highlights the genetic
relationship between deeper porphyry copper-molybdenum mineralization
and overlying high- and low-sulphidation epithermal environments. At
Redonda, observed features such as multi-phase intrusions,
brecciation, quartz stockwork veining, and chalcopyrite-molybdenite
mineralization are consistent with the upper levels of a porphyry
system. The presence of breccia-hosted mineralization and alteration
patterns suggests that the current drilling may be testing the upper
portions of a larger hydrothermal system, with potential for a more
robust mineralized core at depth. This conceptual framework supports
continued exploration targeting both lateral and vertical extensions
of the system.

The Redonda Copper-Molybdenum Project Technical Report
was prepared by W.B. Lennan, P.Geo., of Port Coquitlam, British
Columbia. Mr. Lennan is a Professional Geologist and an Independent
Qualified Person as defined under National
Instrument 43-101 – Standards of Disclosure for Mineral Projects.
The report will be available on the Company’s website and filed on
SEDAR+.

Figure 3: Claim
Map and Logging Road Access to Red Claims Showing Area from Redonda
Bay

The Redonda Copper-Molybdenum Project Technical Report
was prepared by W.B. Lennan, P.Geo., of Port Coquitlam, British
Columbia. Mr. Lennan is a Professional Geologist and an Independent
Qualified Person as defined under National Instrument 43-101 –
Standards of Disclosure for Mineral Projects. The report will be
available on the Company’s website and filed on SEDAR+.

Mr. Lennan is a registered member of Engineers and
Geoscientists British Columbia (Member No. 19,150; Permit to Practice
No. 1003445), a Fellow of the Geological Association of Canada (Fellow
No. 3445), and a Fellow of the Canadian Institute of Mining,
Metallurgy and Petroleum (Fellow No. 94375).

About Redonda

The Redonda Project is a district-scale
copper-molybdenum exploration asset comprising 2,746.46 hectares
across nine contiguous mineral claims, located approximately 40 km northeast of Campbell River, British
Columbia. The property benefits from excellent infrastructure,
including year-round barge access and an established network of
logging roads, supporting efficient and cost-effective
exploration.

Redonda is situated within the highly prospective Coast
Suture Zone, a prolific geological corridor known for hosting
significant porphyry copper systems in southwestern British Columbia.
The Project exhibits key geological features associated with
large-scale porphyry deposits, including multi-phase intrusive
activity, extensive brecciation, and strong copper-molybdenum
mineralization.

Mineralization is centered along a broad hornblende
porphyry dike system, where drilling and surface work have identified
widespread sulphide mineralization within brecciated zones and
stockwork veining. These features, combined with evidence of a robust
hydrothermal system, support the interpretation that Redonda may
represent the upper portion of a larger porphyry center.

Importantly, the Project shares geological similarities
with nearby copper-molybdenum deposits, including OKover and Gambier,
reinforcing its potential to host a significant mineralized system.
With mineralization open in multiple directions and a growing database
of drilling and geophysical data, Redonda represents a compelling
exploration opportunity with strong discovery potential.

The Company has established a solid permitting
foundation and maintains positive engagement with local First Nations,
positioning Redonda for continued advancement through systematic
exploration.

Qualified Person

The scientific and technical information contained in
this news release has been reviewed and approved by Lawrence
Segerstrom, P.Geo., M.SC., MBA, a consulting geologist who is a
“Qualified Person” as such term is defined under National
Instrument 43-101 – Standards of Disclosure for Mineral Projects
(“NI 43-101”). Mr. Segerstrom is not at arm’s length to Vanguard
and is therefore not independent for the purposes of NI 43-101.

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 uranium
exploration projects in the United States 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.

All Stakeholders are encouraged to follow the Company
on its social media profiles on LinkedIn, X.com,Facebook and Instagram and sign up forupdates at Vanguardminingcorp.com

Neither the Canadian SecuritiesExchange nor its Regulation Services Provider (as that term is definedin the policies of the CSE) accepts responsibility for the adequacy oraccuracy of this release.

On Behalf of the Board ofDirectors

“David Greenway”

David Greenway, CEO

For further information, pleasecontact:

Vanguard Mining Corp.

Brent Rusin

Phone: +1 672-533-0348

E-Mail: brent@vanguardminingcorp.com

Website: vanguardminingcorp.com

Disclaimer for Forward-LookingInformation

Certain statements in this newsrelease constitute “forward-looking statements” or“forward-looking information” (collectively, “forward-lookingstatements”) within the meaning of applicable securities laws.Forward-looking statements are statements that are not historicalfacts and include, but are not limited to, statements regardingbeliefs, plans, expectations, intentions, objectives, strategies,future performance, and anticipated events or results. Forward-lookingstatements are based on management’s current expectations,estimates, and assumptions, which may prove to be incorrect, and aresubject to known and unknown risks and uncertainties that could causeactual results, performance, or developments to differ materially fromthose expressed or implied. There can be no assurance that the eventsanticipated in forward-looking statements will occur, or, if they do,what benefits Vanguard will obtain from them. Factors that could causeactual results to differ materially include, among others, explorationresults, availability of financing, commodity prices, permitting andregulatory risks, operating risks, and other risks described in theCompany’s public disclosure. Forward-looking statements in thisrelease are made as of the date hereof, and Vanguard undertakes noobligation to update or revise any forward-looking statements, whetheras a result of new information, future events, or otherwise, except asrequired by applicable securities laws. Readers are cautioned not to place undue relianceon forward-looking statements.

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