Myriad hits high-pressure slurry ablation test milestone at Copper Mountain

Vancouver, British Columbia--(Newsfile Corp. - September 22, 2026) - Myriad Uranium Corp. (CSE: M) (OTCQB: MYRUF) (FSE: C3Q) ("Myriad" or the "Company") is pleased to announce the results of an initial testing campaign conducted by DISA Uranium™ Corporation (" DISA Uranium ") in 2026 with samples from Myriad Uranium. The primary objective of testing was to determine how efficiently DISA's high-pressure slurry ablation technology (" HPSA™") could concentrate uranium and improve recovery of uranium from the concentrated mass fraction.

Myriad's CEO, Thomas Lamb, commented: "Wyoming's DISA Uranium, in partnership with IsoEnergy and with backing from other uranium industry leaders, has developed a slurry ablation technology, which is potentially tailor-made for Copper Mountain's uraniferous material . Simply put, initial tests confirm that the process can reduce rock mass by about 70%, while producing a 3-fold increase in grade. More testing will be required at scale, but this is a highly encouraging initial result."

HPSA™ test results indicate the following:

Effective particle size reduction (setting up the size-based separation that follows).

Meaningful reduction of uranium in the clean coarse material achieved (74.5% to 87.9%). Most of the uranium was successfully stripped out of the coarse rock, which is typically discarded as waste.

78.8% reduction in Ra-226 activity and an 83.5% reduction in Th-230 activity, leaving cleaner waste material for handling and disposal.

Calculated recoveries of uranium in the fines concentrate were 83.9% (over the first-time interval sample) and 90.6% (over the second time interval sample). This is only a marginal increase in recovery over a longer period of ablation.

HPSA™ test results indicate that with minimal particle collisions, the process concentrated 83.9% of the uranium into 29.3% of the overall mass, i.e. a roughly