Mr. David Greenway reports

VANGUARD MINING ANNOUNCES EFFECTIVE DATE OF PREVIOUSLY ANNOUNCED NAME CHANGE TO URANIUM ONE MINING CORP. AND CONSOLIDATION

Effective April 27, 2026, Vanguard Mining Corp.'s name will change from Vanguard Mining Corp. to Uranium One Mining Corp., and the company will consolidate its common shares on a one-for-3.5 basis as previously announced on April 21, 2026.

It is expected that the company will begin trading on the Canadian Securities Exchange under the new name and on a consolidated basis on April 27, 2026. The new Cusip number will be 916927106, and the new ISIN will be CA9169271066 for the postconsolidation common shares of Uranium One. The total issued and outstanding number of common shares postconsolidation will be approximately 29,123,355. The company's stock symbol will remain unchanged.

Registered holders of physical share certificates will receive a letter of transmittal by mail advising that the name change and consolidation have been effected and will contain instructions on how to exchange share certificates evidencing preconsolidated common shares for new share certificates representing the number of postconsolidated common shares to which they are entitled.

No action is required for shares held by non-registered holders (shareholders who hold their shares through an intermediary) and outstanding direct registration system.

The name change is intended to reflect the company's expanded focus on its uranium portfolio, including the Yuty Prometeo project located in Paraguay, the Nuclean uranium project in the Athabasca basin, Saskatchewan, and the Quark uranium property, also located in the Athabasca basin, as well as potential future acquisitions in the uranium sector.

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 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.

We seek Safe Harbor.