Mr. Thomas Lamb of Myriad Uranium reports

MYRIAD URANIUM CORP. AND RUSH RARE METALS CORP. ANNOUNCE RECEIPT OF FINAL COURT APPROVAL FOR PLAN OF ARRANGEMENT

Rush Rare Metals Corp. has obtained a final order from the Supreme Court of British Columbia approving the previously announced statutory plan of arrangement under the Business Corporations Act (British Columbia), pursuant to which Myriad Uranium Corp. will acquire all of the issued and outstanding common shares of Rush.

Receipt of the final order follows the special meeting of shareholders of Rush held on Aug. 17, 2026, 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 on the basis of one Myriad share for every 1.85 Rush shares held, subject to adjustment in accordance with the terms of the arrangement agreement dated Feb. 13, 2026. In addition, holders of Rush shares will receive shares of 1577075 B.C. Ltd. (Rush Spinco) on the basis of one Rush Spinco share for every four Rush shares held, in connection with the previously announced spinout 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 parties currently anticipate that the arrangement will be completed on or about Aug. 21, 2026.

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+.

About Myriad Uranium Corp.

Myriad Uranium holds a 75-per-cent interest in the Copper Mountain uranium project in Wyoming, with a definitive agreement in place to acquire the remaining 25 per cent via the acquisition of Rush Rare Metals. Copper Mountain hosts multiple historic uranium deposits and past-producing mines, including the Arrowhead mine (approximately 500,000 pounds (lb) 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 $125-million (2026 dollars) in the project, generating significant historical resource estimates.

A news release detailing a comprehensive assessment of Copper Mountain's uranium endowment by Bendix Engineering for the U.S. Department of Energy published in 1982 can be viewed on-line.

Myriad holds a 10-per-cent free carried interest in the Red Basin uranium project, recently sold to VC- and Overmatch-backed Subatomic Industries. Red Basin carries significant historical resource estimates from extensive drilling by Occidental Oil in the late 1970s and also hosts vanadium, which has been designated a strategic and critical mineral by the U.S. government. Note the caution on historical estimates below.

Myriad's 100-per-cent-owned Breccia Pipe project in Arizona comprises at least 23 breccia pipes that are prospective for uranium and REEs (rare earth elements). One of the pipes, the Wate pipe, was previously owned and explored by Energy Fuels and is the subject of a historical resource estimate.

Note that a qualified person has not done sufficient work to classify the Copper Mountain, Red Basin and Breccia Pipe project historical estimates as current mineral resources or reserves, and Myriad is not treating historical estimates as current resources or reserves. Myriad intends to conduct further work to determine whether the historical estimates can be verified and, if appropriate, supported by current mineral resource estimates.

For further information, please refer to Myriad's disclosure record on SEDAR+, contact Myriad by telephone at 1-604-418-2877, or refer to Myriad's website.

About Rush Rare Metals Corp.

Rush Rare Metals is a mineral exploration company focused on its Boxi property, located in the province of Quebec, Canada. Rush also owns the Copper Mountain project, located in Wyoming, which it has optioned to Myriad Uranium. Rush currently has a 100-per-cent interest in the Boxi property and a 25-per-cent interest in the Copper Mountain project. For further information, please refer to Rush's disclosure record on SEDAR+, or contact Rush by e-mail at psmith@rushraremetals.com or by telephone at 778-999-7030, or refer to Rush's website.

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