Myriad Uranium and Rush Rare Metals receive final court approval for plan of arrangement

Vancouver, British Columbia--(Newsfile Corp. - August 19, 2026) - Myriad Uranium Corp. (" Myriad ") and Rush Rare Metals Corp. (" Rush ", and together with Myriad, the " Parties ") are pleased to announce that Rush has obtained a final order (the " Final Order ") from the Supreme Court of British Columbia approving the previously announced statutory plan of arrangement (the " Arrangement ") under the Business Corporations Act (British Columbia), pursuant to which Myriad will acquire all of the issued and outstanding common shares of Rush (the " Rush Shares ").

Receipt of the Final Order follows the special meeting of shareholders of Rush held on August 17, 2026 (the " Meeting "), at which the Arrangement was approved by the requisite majority of Rush shareholders.

Pursuant to the Arrangement, Myriad will acquire all of the Rush Shares in exchange for common shares of Myriad (the " Myriad Shares ") on the basis of one (1) Myriad Share for every 1.85 Rush Shares held, subject to adjustment in accordance with the terms of the arrangement agreement dated February 13, 2026 (the " Arrangement Agreement "). In addition, holders of Rush Shares will receive shares of 1577075 B.C. Ltd. (" Rush Spinco ") on the basis of one (1) Rush Spinco share for every four (4) Rush Shares held, in connection with the previously announced spin-out of Rush's Boxi Property.

Subject to the satisfaction or waiver of the remaining customary closing conditions set out in the Arrangement Agreement, including receipt of final approval from the Canadian Securities Exchange (the " CSE "), the Parties currently anticipate that the Arrangement will be completed on or about August 21, 2026 (the " Closing Date ").

Upon completion of the Arrangement, Rush will become a wholly owned subsidiary of Myriad. The common shares of Rush will be delisted from the CSE, and Rush intends to apply to cease to be a reporting issuer under applicable Canadian securities laws.

On the Closing Date, Rush will have completed all of its responsibilities under the Arrangement except in regard of the spinout of Rush Spinco that will hold the Boxi Property in Quebec. Any remaining share exchanges or return to treasury of shares are expected to be completed by Rush Spinco at some time following the Closing Date, as determined by management of Rush Spinco.

Full details of the Arrangement are set out in the management information circular of Rush dated June 23, 2026, which is available under Rush's profile on SEDAR+ at www.sedarplus.ca .

About Myriad Uranium Corp.

Myriad Uranium Corp. holds a 75% interest in the Copper Mountain Uranium Project in Wyoming, USA, with a definitive agreement in place to acquire the remaining 25% via the acquisition of Rush Rare Metals Corp. Copper Mountain hosts multiple historic uranium deposits and past-producing mines, including the Arrowhead Mine (approximately 500,000 lbs U₃O₈ produced). Union Pacific conducted extensive exploration and development in the district during the late 1970s, including approximately 2,000 boreholes and advanced mine planning, before the uranium market downturn in 1980. Union Pacific is estimated to have invested approximately C$125 million (2026 dollars) in the project, generating significant historical resource estimates.