Vancouver, BC – TheNewswire - September 3, 2025 – Vanguard Mining Corp. ("Vanguard" or the "Company") (UUU: CSE |UUUFF: OTCID | SL51: Frankfurt) is pleased to announce that, further to its Definitive Agreement (the “Agreement”) dated June 17, 2025, and its Letter of Intent (“LOI”) dated April 8, 2025, the Company has closed the acquisition of the Yuty Prometeo Project (“Paraguay Uranium”) in southeastern Paraguay.

The four concessions — including the three San Jose and one Yuty Uno concession — collectively span approximately 90,000 hectares (222,395 acres) within the prolific Paraná Basin, one of South America’s most promising uranium regions. The project area is located adjacent to Uranium Energy Corp.’s (“UEC”) established Yuty Deposit, which hosts an Indicated resource of 8.96 million pounds of U₃O₈.

David Greenway, CEO of Vanguard Mining Corp., commented, “Closing on the Yuty Prometeo concessions is a major milestone for Vanguard and underscores our commitment to building a dominant uranium portfolio in South America. Paraguay offers a unique combination of political stability, investor-friendly policies, and untapped mineral potential that make it an ideal jurisdiction for long-term uranium exploration. With our ground positioned directly alongside UEC’s established Yuty deposit, we see clear opportunity to apply modern exploration techniques across a historically prospective district. This acquisition not only strengthens our strategic footprint in the Paraná Basin but also advances Vanguard’s broader mission to secure critical minerals that will drive the global clean energy transition.”

This acquisition follows Company updates issued on April 17, 2025 (engagement of senior geologist Ariel Testi, CPG, to prepare an initial NI 43-101 technical report on the Yuty Prometeo Project), June 12, 2025 (initiation of a site visit, core review and data compilation in Paraguay to support that report), and June 17, 2025 (execution of a Definitive Share Purchase Agreement to acquire 100% of 1302343 B.C. Ltd., which holds an 85% interest in Paraguay Uranium S.A., owner of the four Yuty Prometeo concessions).

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Figure 1: Project map of the Yuty Prometeo Concessions showing regional road access, Vanguard’s San Jose and Prometeo concession boundaries, and the adjacent Uranium Energy Corp. (UEC) Yuty Project.

Notes:

Vanguard concession blocks are shown as Vanguard Mining and outlined with black-orange lines. Radiometric anomalies: Increasing intensity is shown in yellow-pink-red-violet-blue.

About the Yuty Prometeo Project

The Yuty Prometeo consists of four (4) concessions—three (3) San Jose concessions and one (1) Prometeo concession—covering a combined area of approximately 90,000 hectares (222,395 acres) within the uranium-rich Paraná Basin in southeastern Paraguay.

The Prometeo Concession spans approximately 27,666 hectares (68,368 acres) and is directly 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 (153,754 acres) 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 conducted over a 40 km by 10 km area delineated significant uranium anomalies across the property. Collectively, these concessions represent a strategically positioned and highly prospective uranium exploration asset within one of South America’s most promising uranium districts.

About UEC’s Yuty ISR Project

UEC’s adjacent Yuty ISR Project, covering approximately 117,359 hectares (290,000 acres) in southeastern Paraguay, hosts an Indicated resource of 8.962 million lbs 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 has been identified as amenable to in-situ recovery (“ISR”), the same extraction method UEC employs at its operations in Texas. Vanguard cautions that mineralization on adjacent properties is not necessarily indicative of mineralization on the Company’s own projects.

On March 30, 2012, UEC acquired all outstanding shares of CUE Resources Ltd., securing a 100% undivided interest in the Yuty Project.1

Resource Estimates

The current disclosed resource for UEC’s Yuty Project is 8.962 million lbs of U308 Indicated, and 2.203 million lbs of U308 Inferred, which has been finalized in a technical report prepared for UEC titled “Yuty Uranium Project Initial Assessment US SEC Subpart 1300 Regulation SK Report, Paraguay SA” dated July 1, 2022. 2

Vanguard’s management cautions that past results or discoveries on properties adjacent to Vanguard’s projects may not be indicative of mineralization on the Company’s own properties.

About Paraguay

The Republic of Paraguay is an emerging mining jurisdiction in the heart of South America, bordered by Brazil, Argentina, and Bolivia. Known for its political stability, low sovereign risk, and investor-friendly regulatory environment, Paraguay offers a supportive framework for mineral exploration and development. The country has a democratic government, strong legal protections for foreign investment, and a growing interest in unlocking its untapped mineral potential, particularly in uranium, rare earth elements, and base metals. With abundant land, a relatively low population density, and improving infrastructure, Paraguay is increasingly recognized as a geopolitically stable and strategically attractive destination for mining companies seeking long-term growth opportunities.

Restricted Share Units Issuance

The Company announces it has granted 800,000 Restricted Share Units (“RSUs”) to officers and directors of the Company. The RSU’s are valid for a term of one year and under the terms of the Company’s Restricted Share Unit Plan (the “RSU Plan”). All RSUs expire on September 1, 2026. 

 

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 for updates at Vanguardminingcorp.com

Qualified Person  

The scientific and technical information contained in this news release has been reviewed and approved by Lawrence Segerstrom, 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”). 

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 release are forward-looking statements, which reflect the expectations of management regarding Vanguard’s intention to continue to identify potential transactions and make certain corporate changes and applications. Forward looking statements consist of statements that are not purely historical, including any statements regarding beliefs, plans, expectations, or intentions regarding the future. Such statements are subject to risks and uncertainties that may cause actual results, performance, or developments to differ materially from those contained in the statements. No assurance can be given that any of the events anticipated by the forward-looking statements will occur or, if they do occur, what benefits Vanguard will obtain from them. These forward-looking statements reflect managements’ current views and are based on certain expectations, estimates and assumptions which may prove to be incorrect. A number of risks and uncertainties could cause actual results to differ materially from those expressed or implied by the forward-looking statements, including Vanguard’s results of exploration or review of properties that Vanguard does acquire. These forward-looking statements are made as of the date of this news release and Vanguard assumes no obligation to update these forward-looking statements, or to update the reasons why actual results differed from those projected in the forward-looking statements, except in accordance with applicable securities laws.

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1 Source : https://www.uraniumenergy.com/news/releases/index.php?content_id=910

2 Source : https://www.sec.gov/Archives/edgar/data/1334933/000143774922017351/ex_396105.htm