Vanguard Mining Secures Key Environmental License for Yuty Prometeo Uranium Project

Vancouver, BC — November 14, 2025 — Leads & Copy — Vanguard Mining Corp. (CSE: UUU | OTCID: UUUFF | Frankfurt: SL51) has secured an Environmental License from the Ministerio del Ambiente y Desarrollo Sostenible (MADES), marking a significant step in the regulatory process for its Yuty Prometeo Uranium Project in Paraguay.

The license is a key requirement for advancing exploration and development at the company’s 90,000-hectare Yuty Prometeo Uranium Project (Paraguay Uranium) in southeastern Paraguay. This project is strategically located in an emerging energy jurisdiction that is gaining importance in the global nuclear fuel supply chain.

According to Vanguard Mining Corp. CEO David Greenway, this prospection permit strengthens the company’s portfolio of high-value uranium assets in Paraguay and de-risks the path toward full exploration and development authorization. Greenway added that Paraguay offers a stable and supportive jurisdiction and that the company is focused on building a strong, South America–focused uranium portfolio.

The Yuty Prometeo Project consists of four concessions, including three San Jose concessions and one Yuty Uno concession, spanning approximately 90,000 hectares within the Paraná Basin. The project is located adjacent to Uranium Energy Corp.’s (UEC) Yuty Deposit, which hosts an Indicated resource of 8.96 million pounds of U₃O₈.

The Prometeo Concession spans approximately 27,666 hectares and is contiguous to UEC’s Yuty Project. Historical records reference 28 drill holes on the property, with uranium values ranging from 0.05% to 0.10% U₃O₈. Data from previous work by the Anschutz Corporation suggest that the Prometeo block lies on trend with UEC’s adjacent Transandes block.

The San Jose Concessions encompass approximately 62,210 hectares across three contiguous claims situated along the Upper Permian–Carboniferous contact, approximately 100 km northwest of UEC’s Yuty Project and 40 km west of its Coronel Oviedo Project. A radiometric car survey delineated significant uranium anomalies across the property.

Vanguard cautions that the historical drill results referenced in the release are considered historical in nature and should not be relied upon, as the company has not yet completed the work necessary to independently verify them in accordance with NI 43-101. The company plans to complete confirmatory drilling to verify the historical information.

UEC’s Yuty ISR Project spans approximately 117,359 hectares and hosts an Indicated resource of 8.962 million lbs U₃O₈ and an Inferred resource of 2.203 million lbs U₃O₈, as disclosed in its July 1, 2022, technical report titled“Yuty Uranium Project Initial Assessment US SEC Subpart 1300 Regulation SK Report, Paraguay SA.” The project is considered amenable to in-situ recovery (ISR), the same extraction method UEC employs at its Texas operations. Vanguard cautions that mineralization on adjacent properties is not necessarily indicative of mineralization on the Company’s own projects.

The Republic of Paraguay is an emerging mining jurisdiction known for its political stability, low sovereign risk, and investor-friendly regulatory environment. With a democratic government, strong legal protections for foreign investment, and improving infrastructure, Paraguay offers a supportive framework for mineral exploration and development.

Vanguard Mining Corp. is a Canadian mineral exploration company focused on the discovery and development of high-value strategic minerals, advancing uranium exploration projects in the United States and Paraguay.

The scientific and technical information in this release has been reviewed and approved by Lawrence Segerstrom, a consulting geologist and Qualified Person as defined under National Instrument 43-101.

Brent Rusin, Vanguard Mining Corp., +1 672-533-0348, brent@vanguardminingcorp.com

Source: Vanguard Mining Corp.