Mr. Thomas Lamb reports

EARLY WARNING PRESS RELEASE REGARDING RUSH RARE METALS CORP.

Myriad Uranium Corp. has acquired an aggregate of 46,223,258 common shares of Rush Rare Metals Corp. pursuant to a statutory plan of arrangement as previously announced by Myriad on Aug. 21, 2026. Under the arrangement, Myriad issued an aggregate of 24,983,671 Myriad common shares to Rush shareholders at a deemed price of 42 cents per Myriad share, representing aggregate consideration of $10,493,141.80. Prior to the arrangement, Myriad did not hold any Rush shares. Following the arrangement, Myriad holds 46,223,258 Rush shares, representing 100 per cent of the issued and outstanding Rush shares.

The Form 62-103F1 (Required Disclosure under the Early Warning Requirements) associated with this news release can be obtained from Rush's profile on SEDAR+. To obtain a copy of the report, please contact Thomas Lamb of Vancouver, B.C., at 1-604-418-2877 or tlamb@myriaduranium.com.

About Myriad Uranium Corp.

Myriad Uranium holds a 100-per-cent interest in the Copper Mountain uranium project in Wyoming, United States. Copper Mountain hosts multiple historic uranium deposits and past-producing mines, including the Arrowhead mine (approximately 500,000 pounds truranium octoxide 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.

Myriad holds a 10-per-cent free carried interest in the Red Basin uranium project, recently sold to 8VC- 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.

Myriad's 100-per-cent-owned Breccia Pipe project in Arizona comprises at least 23 breccia pipes that are prospective for uranium and 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: 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.

We seek Safe Harbor.