Mr. Ungad Chadda of Global Uranium reports

GLOBAL URANIUM COMPLETES PHASE 1 EARN-IN AT ASTRO PROJECT AND SECURES INITIAL 20% INTEREST

Pursuant to its option agreement with Cosa Resources Corp., Global Uranium Corp. has completed the phase 1 requirements to earn an initial 20-per-cent interest in the Astro project, located in the eastern Athabasca basin in Saskatchewan.

Under the terms of the option agreement (announced on April 9, 2025), Global may earn up to an 80-per-cent interest in Astro over five earn-in phases by sole financing exploration expenditures and completing cash payments and share issuances. Completion of phase 1 marks an important milestone in the advancement of the project and reflects the company's continued focus on building a meaningful uranium exploration portfolio in the Athabasca basin.

Astro comprises a large land package in the eastern Athabasca basin and is considered highly prospective for unconformity-related uranium mineralization. During 2025, the project advanced through an initial helicopter-borne Z-axis tipper electromagnetic survey (ZTEM), which identified a 25-kilometre conductive corridor and several priority target areas for follow-up. More recently, the company announced plans for an ambient noise tomography survey designed to further refine high-priority structural targets and support future drill targeting.

Ungad Chadda, chief executive officer of Global Uranium, commented: "Completing phase 1 at Astro is an important milestone for Global Uranium and reflects the steady progress we are making across our exploration portfolio. We are pleased to have earned this initial interest in the project under our agreement with Cosa and look forward to continuing to advance Astro as we evaluate the next phase of work."

The Astro project is operated by Cosa pursuant to the terms of the option agreement. Global intends to continue advancing the project through follow-up geophysical work and target refinement as it evaluates the next phase of earn-in activities.

Qualified person

Dr. Jared Suchan, PhD, PGeo, Global Uranium's vice-president of exploration and qualified person under National Instrument 43-101, has reviewed and approved the contents of this news release. For a discussion of the company's quality assurance/quality control and data verification procedures and processes, please see its technical report entitled, "NI 43-101 on the Northwest Athabasca Project, Northern Saskatchewan, Centered at: Latitude 59 degrees 24'00" N, Longitude 109 degrees 54'00" W," a copy of which may be obtained under the company's profile on SEDAR+.

About Global Uranium Corp.

Global Uranium focuses on exploring and developing uranium assets primarily in North America. The company currently holds key uranium projects: the Wing Lake project in the Mudjatik domain of Northern Saskatchewan, Canada; the Astro project (with Cosa Resources ) in the eastern Athabasca basin in Saskatchewan; the Airline project in the northern Wind River basin in Wyoming, United States; as well as additional projects across the Gas Hills and Great Divide districts in Wyoming.

About Cosa Resources Corp.v

Cosa Resources is a Canadian uranium exploration company operating in Northern Saskatchewan. Its portfolio comprises roughly 237,000 hectares across multiple 100-per-cent-owned and Cosa-operated joint venture projects in the Athabasca basin region, all of which are underexplored, and the majority reside within or adjacent to established uranium corridors. Cosa's award-winning management team has a long record of success in Saskatchewan. In 2022, members of the Cosa team were awarded the AME Colin Spence Award for their previous involvement in discovering IsoEnergy's Hurricane deposit. In addition to Hurricane, Cosa personnel led teams or had integral roles in the discovery of Denison's Gryphon deposit and held key roles in the founding of both NexGen and IsoEnergy.

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