Atha Energy makes Major New Discovery along the Rib Corridor

23 September 2025

ATHA Energy Corp. (TSX.V: SASK) (FRA: X5U) (OTCQB: SASKF) (“ATHA” or the “Company”), is pleased to announce additional drilling results from the 2025 Angilak Exploration Program at its 100%-owned Angilak Uranium Project in Nunavut, Canada. The results are from an additional three diamond drillholes: RIBN-DD-001, RIBS-DD-001, and RIBW-DD-003, all of which targeted east-west and north-south cross cutting structures along the Mineralized Rib Corridor (“MRC”).

The MRC is now defined by over 12 km of stacked conductors based on the EM Inversion Model (Figure 2). The eastern limb of the MRC now has mineralization traced over a potential 4.4 km strike length, extending from RIB South, across RIB East to RIB North. Mineralization along the parallel, western limb of the MRC, extends from the Historic RIB Discovery through to the RIB West Discovery, tracing mineralization over a potential 4.0 km strike length. Outside of the currently defined discoveries, the MRC remains open and prospective for additional discoveries across the entire 12 km MRC.