Mr. David Greenway reports

VANGUARD MINING CORP. ANNOUNCES COMPLETION OF BRUSSELS CREEK SAMPLING PROGRAM

Hardline Exploration Ltd. has successfully completed the exploration program at Vanguard Mining Corp.'s 100-per-cent-owned Brussels Creek gold-copper-palladium project, located in the Kamloops mining district in British Columbia.

Sampling program completed

The 2025 program, previously announced on June 10, 2025, was designed to follow up on a near-surface gold discovery reported in 2023 and focused on systematic surface sampling to refine priority targets for follow-up drilling. The work comprised 21 rock samples, collected from surface mineralized zones, structural features and altered host rocks, and 127 soil samples, collected in systematic grids, to define geochemical anomalies and extensions to known mineralized trends. The sampling program was undertaken by Hardline personnel under the direction of Jeremy Hanson, PGeo.

All samples were bagged, security tagged and maintained under secure storage on site until shipment and then shipped by Bandstra Transportation Systems Ltd. to SGS Canada Inc. in Burnaby, B.C., for preparation and analysis. Rock samples are being analyzed using a four-acid ICP package and fire assay for gold, platinum and palladium while soil samples are being analyzed using aqua regia digestion with fire assay for gold, platinum and palladium where warranted. Fire assay with AA and gravimetric finishes remains the industry standard for gold and PGM (platinum group metal) determination, and SGS meets all analytical best-practice requirements. Vanguard implements its own internal quality assurance/quality control program.

A secure chain of custody is maintained throughout sample collection, storage, transport and laboratory submission and, in addition to SGS's QA/QC protocols, supports the reliability of the analytical results.

Analytical results will be reported once received, compiled and reviewed by the company and its qualified person, Lawrence Segerstrom, PGeo, MSc, MBA. Upon receipt and interpretation of the assay results, Vanguard will prioritize targets for a potential 2026 drilling program and incorporate results into the forthcoming National Instrument 43-101 technical report.

About Hardline Exploration Corp.

Hardline Exploration is a geological consulting and project management company based in Smithers, B.C. The company specializes in early- to advanced-stage mineral exploration, offering comprehensive services including geological mapping, geochemical and geophysical program design, data interpretation, and project management. Hardline has a strong record of executing cost-effective, technically robust field programs across Western Canada.

David Greenway, president and chief executive officer of Vanguard Mining, commented: "The 2025 surface program at Brussels Creek represents an important step in advancing our understanding of the broader mineralized system. The near-surface gold intercept reported in 2023 provided a strong proof-of-concept, and this year's detailed rock and soil sampling is designed to refine the vectors toward additional drill targets. These results will also contribute directly to advancing a new NI 43-101 technical report for the project. We look forward to reviewing the assay data as we continue to systematically advance this promising gold-copper-palladium project."

QA/QC and data verification

All samples from Brussels Creek were collected, handled and processed under industry-standard protocols. Samples were maintained under secure chain of custody from collection through transport and laboratory submission. Analytical work is being carried out by SGS, an independent laboratory that meets the requirements of ISO/IEC 17025:2017 and ISO 9001:2015.

SGS retains coarse rejects and pulps for future verification and reanalysis, as required.

Vanguard implements a comprehensive internal QA/QC program. The program includes the routine insertion of blanks, certified reference materials (standards) and duplicate samples into the sample stream at regular intervals to monitor analytical accuracy and precision. Laboratory internal QA/QC procedures are also reviewed to ensure continued compliance with best practices.

The qualified person has reviewed the results of the QA/QC program and reports no issues that would indicate problems with the sampling, analytical procedures or data integrity. All data have been verified to a level appropriate for an early-stage exploration program.

Historical information referenced in this release has been reviewed against available assessment reports; however, such data cannot be independently verified to current NI 43-101 standards and are therefore considered supportive for exploration guidance only.

Regional context and indigenous collaboration

On Nov. 3, 2025, Coeur Mining Inc. announced a definitive agreement to acquire New Gold Inc. in a $7-billion (U.S.) all-stock transaction, creating a combined $20-billion (U.S.) mining company. This development further elevates the strategic importance of the region and highlights the consolidation of major copper-gold assets in British Columbia.

Brussels Creek is strategically located adjacent to New Gold's New Afton mine, a long-running copper-gold operation situated within the same prolific Quesnel terrane. The proximity of Brussels Creek to this established, high-value mining complex enhances Vanguard's exploration potential and underscores the strategic significance of its land position within a district known for large alkalic porphyry copper-gold systems. The proximity of Brussels Creek to this established, high-value mining complex enhances Vanguard's exploration upside and underscores the strategic significance of its land position within British Columbia's prolific Quesnel terrane, a district renowned for hosting large porphyry copper-gold systems.

Vanguard acknowledges that the Brussels Creek project lies within the Stk'emlupsemc te Secwepemc territory, on the unceded traditional lands of the Secwepemc Nation. The company is committed to working in close collaboration with Tk'emlups te Secwepemc (TteS) throughout the execution of current and future exploration programs. This collaboration includes a focus on local employment and training opportunities, procurement from indigenous-owned businesses, environmental stewardship aligned with community priorities, and transparent, continuing engagement as activities progress.

Vanguard also continues first nation consultation and an archeological impact assessment (AIA), required prior to accessing additional priority sites identified in the NI 43-101 technical report prepared for Vanguard (formerly Le Mare Gold Corp.) dated Feb. 19, 2021, and revised April 12, 2021, by Chris M. Healey, PGeo, principal geologist, Healex Consulting Ltd. (EGBC No. 36477).

About the Brussels Creek property (Kamloops, B.C.)

The Brussels Creek property lies approximately 24 kilometres west of Kamloops, immediately adjacent to New Gold's New Afton mine. The project covers 1,350.43 hectares (17 claims; 66 cells) and hosts a geological setting analogous to New Afton as well as Highland Valley, Mount Polley, Kemess and Galore Creek -- all silica-saturated, copper-gold alkalic porphyry deposits.

Fieldwork has identified a mineralized quartz-feldspar porphyry body intruding Nicola group volcanics. Historical sampling (1983 to 1984) delineated a 200-metre-by-400-metre anomalous zone grading up to 3.5 grams per tonne gold, and 2019 grab samples returned 10.1 grams per tonne gold (with 0.7 gram per tonne palladium) and 11.5 grams per tonne gold, confirming high-grade surface mineralization.

Disclosure regarding New Afton: Information on New Gold's New Afton mine is sourced from New Gold's publicly filed 2024 annual results and provided solely to illustrate Brussels Creek's proximity to an operating mine. The qualified person confirms this does not constitute restricted disclosure under NI 43-101, Section 2.3(1)(a), as it refers to production from a third party operation, not the company's property.

About Vanguard Mining Corp.

Vanguard Mining 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 and precious metal properties.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Mr. Segerstrom, a consulting geologist who is a qualified person as such term is defined under NI 43-101, Standards of Disclosure for Mineral Projects. Mr. Segerstrom is not at arm's length to Vanguard and is therefore not independent for the purposes of NI 43-101.

The disclosure regarding production results from New Gold's New Afton mine is based on information contained in New Gold's publicly filed 2024 annual results. This information is provided strictly for contextual purposes to highlight the proximity of the company's Brussels Creek project to an established mining operation. The qualified person confirms that this disclosure does not constitute restricted disclosure under Section 2.3(1)(a) of NI 43-101 as it refers to actual reported production from a third party mine and not to the company's property or mineralization.

The references to historical sampling results (1983 to 1984) and grab samples collected in 2019 are exploration results, not historical estimates, as defined in Section 2.4 of NI 43-101. Accordingly, the historical estimate disclosure requirements of NI 43-101 do not apply. The company cautions that grab samples are selective by nature and may not be representative of overall mineralization on the property.

Vanguard cautions that past results or production from properties in proximity to Vanguard may not necessarily be indicative of mineralization on the company's properties.

We seek Safe Harbor.