Mr. David Greenway reports

VANGUARD MINING CORP. COMPLETES DEFINITIVE AGREEMENT TO ACQUIRE 100% OF QUARK URANIUM LTD

Further to its news release issued on April 10, 2026, Vanguard Mining Corp. has successfully completed its acquisition of Quark Uranium Ltd., pursuant to a share exchange agreement dated April 22, 2026, among the company, Quark Uranium and the shareholders of Quark.

Pursuant to the terms and conditions of the definitive agreement and as consideration for 100 per cent of the issued and outstanding securities of Quark, the company:

• Issued an aggregate of eight million common shares of the company at a deemed price of 15 cents per share;
• Made aggregate cash payments of $200,000.

The transaction represents a total implied value of approximately $1.4-million. All securities issued in connection with the transaction are subject to a statutory hold period of four months and one day in accordance with applicable securities laws.

The company and its directors, officers and insiders are arm's-length parties to the shareholders, directors and officers of Quark. No finders' fees were paid in connection with the transaction.

David C. Greenway, president and chief executive officer of Vanguard Mining, commented: "The successful closing of the Quark acquisition marks an important milestone in the execution of Vanguard's uranium growth strategy. The Quark land package significantly strengthens our footprint in the western Athabasca basin, one of the world's premier uranium districts. With global demand for nuclear energy continuing to accelerate, we are excited to advance exploration on this highly prospective property and deliver long-term value to our shareholders."

About Quark uranium claims

The Quark uranium property consists of eight mineral claims totalling approximately 28,746 hectares (approximately 71,030 acres) located in the province of Saskatchewan, Canada, within the Athabasca basin region.

The property is situated within a well-established uranium-producing district in Northern Saskatchewan that has historically accounted for a significant portion of global uranium production. All of Canada's currently operating uranium mines and many of its known uranium deposits are located within the Western Wollaston domain and the Wollaston-Mudjatik transition zone. The Quark uranium property comprises a contiguous land position in this region and is in proximity to projects operated by established uranium exploration and mining companies, including Orano Canada and Fission Uranium Corp.

The properties are at an early stage of exploration and do not contain any known mineral resources or mineral reserves. While the company considers the property prospective based on its regional geological setting, there can be no assurance that further exploration will result in the discovery of economically recoverable mineralization.

Mineralization on adjacent or nearby properties is not necessarily indicative of mineralization on the Quark uranium property.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Lawrence Segerstrom, PGeo, MSc, MBA, a consulting geologist and a qualified person as defined under National Instrument 43-101, Standards of Disclosure for Mineral Projects. Mr. Segerstrom is not independent of the company within the meaning of NI 43-101.

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.