Vancouver, BC — April 14, 2026 — Leads & Copy —

Vanguard Mining Corp. (CSE: UUU | OTCID: UUUFF | FWB: SL51) has commenced exploration activities at the Nucleon Uranium Project in Saskatchewan’s Athabasca Basin.

The project consists of four exploration areas within regional geological trends associated with uranium mineralization in the Basin. Hardline Exploration Ltd. is managing the initial exploration program across the company’s seven mineral claims.

The Nucleon Project is organized into four exploration areas totaling 23,424.90 hectares (approximately 57,880 acres), a region known for hosting high-grade uranium deposits.

According to David Greenway, CEO of Vanguard Mining Corp., the Nucleon Project provides the Company with a district-scale land position in Saskatchewan’s Athabasca Basin. The project is located within a regional geological setting that hosts uranium deposits, including Fission Uranium’s Patterson Lake South deposit and NexGen Energy’s Arrow deposit. The Company has not identified records of recent systematic modern exploration on the claims.

Exploration activities are underway through a geochemical screening program conducted by Hardline Exploration, designed to evaluate the property and identify areas for follow-up work.

Hardline Exploration will incorporate regional geological interpretations and publicly available data from nearby projects in the analysis of geochemical results from the Nucleon Project. This approach is intended to support the identification and prioritization of areas for follow-up exploration based on geological and geochemical characteristics associated with uranium mineralization.

The Phase 1 program will focus on evaluating the Company’s land package through a lake sediment geochemical survey designed to assess the distribution of uranium and associated pathfinder elements across the seven mineral claims.

Sampling will be conducted under winter conditions, allowing access to frozen lake surfaces and facilitating systematic and efficient sediment collection. The program is expected to be completed in Q2 and will include:

• Systematic lake sediment sampling across all claim blocks
• Multi-element geochemical analysis targeting uranium and associated pathfinder elements (e.g., U, Th, Pb, Ni, Co, REEs)
• Interpretation and mapping of geochemical anomalies
• Prioritization of areas for follow-up exploration

Results from the Phase 1 program will be used to evaluate and rank exploration areas and to support the planning of subsequent exploration activities, which may include ground geophysics, radiometric surveys, geochemical sampling, permitting, and consultation with relevant stakeholders prior to potential drill testing.

The western portion of the Nucleon Uranium Project is situated within a regional structural corridor of the Athabasca Basin that hosts several known uranium deposits, including Fission Uranium’s Patterson Lake South (PLS) deposit and NexGen Energy’s Arrow deposit. These deposits are spatially associated with basement-hosted and unconformity-related uranium systems controlled by major fault zones, graphitic conductors, and reactivated basement structures.

The Nucleon Uranium Project consists of seven exploration-stage mineral claims totaling 23,424.90 hectares (approximately 57,880 acres) in northern Saskatchewan, Canada, within the Athabasca Basin.

The project is divided into four exploration areas, each situated within or adjacent to regional geological trends associated with uranium mineralization. These include:

• North-Western Claims: Located immediately north of properties held by Fission Uranium Corp. and approximately 5 km north of properties held by Orano Canada.
• North-Central Claims: Located in proximity to properties held by Rio Tinto Canada and Apollo Metals.
• Central Claims: Contiguous with properties held by Atha Energy Corp. and CanAlaska Uranium Ltd., and adjacent to claims held by Allied Corp.
• Eastern-Central Claims: Surrounded by properties held by Atha Energy Corp. and located north of claims held by Cameco Corporation.

Together, these four areas provide the Company with a district-scale land position within an active uranium exploration region.

Hardline Exploration Corp. is a geological consulting and project management company based in Smithers, British Columbia. They specialize in early- to advanced-stage mineral exploration, offering services including geological mapping, geochemical and geophysical program design, data interpretation, and project management.

Lawrence Segerstrom, P.Geo., M.Sc., MBA, a consulting geologist retained directly by Vanguard Mining Corp. and a "Qualified Person" as defined under National Instrument 43-101, has reviewed and approved the scientific and technical information contained in this news release.

Vanguard Mining Corp. is a Canadian mineral exploration company focused on the discovery and development of high-value critical minerals, with a primary focus on uranium. The Company maintains a diversified portfolio of exploration-stage properties across Canada, Paraguay, and Argentina.

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

The Company cautions that the presence of uranium mineralization, deposits, or discoveries on nearby properties, including those operated by third parties, is not necessarily indicative of mineralization on the Nucleon Project.

Source: Vanguard Mining Corp.