Atha Energy commences diamond drilling operations in Angilak Exploration Program

HIGHLIGHTS: The 2026 Angilak Exploration Program, is fully funded with the February closing of CAD $63 Million financing, making ATHA one of the best capitalized uranium exploration Companies globally; ATHA completed mobilization to Angilak in late April – including the arrival of a third diamond drill rig – and commenced diamond drilling operations on May 1st, 2026; The 2026 Angilak Exploration Program is focused on expansion and discovery of uranium mineralization across the three mineralized corridors, building upon the highly successful 2024 and 2025 campaigns; Over the two previous programs, ATHA has had unparalleled success, intersecting uranium mineralization in 100% of targets tested. During the 2025 campaign – focused on testing regional targets outside of the Lac 50 Deposit Exploration Target3 area, within the Angikuni Basin – the Company made five new regional discoveries, including the Mineralized RIB Corridor with four new showings; 2026 Angilak Exploration Program will be the largest to date at the Angilak Uranium Project, with two primary components: 1. Diamond drilling operations: Commenced on May 1st, with three drill rigs scheduled to complete ~20,000 m, continuing through September, focusing on: Mineralized RIB Corridor: Additional discovery potential and expansion, following up on the highly successful 2025 program, which resulted in the four discoveries of uranium mineralization – including RIB North, where the maiden hole intersected 34.7 m of composite uranium mineralization1 with grades up to 8.16% U3O8 over 0.5 m; Lac 50 Deposit Corridor: Testing recently identified, highly prospective, targets along strike from the main Lac 50 Deposit area, and expansion of the Lac 50 Deposit mineralization footprint, which remains open and unconstrained. KU-Nine Iron Corridor: Testing recently identified, highly prospective, targets which directly vector from uranium mineralization intersected in the 2025 KU and historic Nine Iron Discoveries; 2. Geophysics: Expert Geophysic’s Aerial MMT survey, scheduled to commence at the end of June: Angikuni Basin: Acquiring full MMT coverage across the 100% ATHA-owned Angikuni Basin. The resulting survey data will then be used to develop a 3D Inversion model of the entire Angikuni Basin. The same highly successful systematic approach ATHA utilized during the 2025 campaign – adding to ATHA’s already extensive portfolio of regional targets.