Atha Energy drills uranium at Angilak's Mushroom Lake

Mr. Troy Boisjoli reports ATHA ENERGY AT ANGILAK PROJECT INTERSECTS HIGH-GRADE URANIUM MINERALIZATION AT MUSHROOM LAKE, ADDITIONAL RESULTS FROM KU DISCOVERY, AND IDENTIFIES SIGNIFICANT RIB-STYLE 3D EM INVERSION ANOMALIES Atha Energy Corp. has released additional drilling results from the 2025 Angilak exploration program at its 100-per-cent-owned Angilak uranium project in Nunavut, Canada. The drill hole results are from two areas: the Mushroom Lake discovery, situated along the Lac 50 trend and the KU discovery, located along the RIB-Nine Iron trend. At the Mushroom Lake discovery, two drill holes were completed, ML-DD-013 and ML-DD-014, both of which intersected uranium mineralization. At the KU discovery, five additional drill holes were completed, all designed to follow-up on the initial discovery drill hole KU-DD-001 (see June 24, 2025, news release). Highlights At Mushroom Lake -- situated along the Lac 50 trend and outside of the Lac 50 exploration target 3 area -- the company successfully completed two drill holes targeting the depth extent of uranium mineralization identified in outcrops over a three-kilometre strike length; Both drill holes successfully intersected uranium mineralization along one km of strike, with drilling highlighted by: Drill hole ML-DD-014: Intersected two zones of uranium mineralization between 334.85 metres and 364.45 m, with total composite mineralization of 2.1 m, including 0.2 m of high-grade mineralization. The first zone (334.85 to 335.95 m) had average radioactivity of 2,830 counts per second (cps) and a maximum reading of 7,659 cps measured on the down hole gamma probe. The second zone (363.45 to 364.45 m) had average radioactivity of 8,045 cps and a maximum reading of 23,365 cps. At the KU discovery -- situated within the 31 km RIB-Nine Iron trend -- The company successfully completed an additional five drill holes, following up on the initial discovery hole KU-DD-001 (see June 24, 2025, news release). Additional drill hole results from KU are highlighted by: Drill hole KU-DD-004: Intersected eight zones of uranium mineralization between 478.05 m and 583.45 m, with total composite mineralization of 10.4 m. The thickest zone of mineralization was intersected between 480.65 and 483.45 m, with average radioactivity of 1,674 cps and a maximum reading 5,805 cps. The 2025 program's unparalleled success directly corresponds to Atha's exploration approach, which has unlocked the geological controls hosting uranium mineralization at Angilak along the RIB-Nine Iron trend. Expert Geophysics Ltd.'s advanced electromagnetic inversion (EM inversion) modelling of its MMT survey data have proven successful in identifying prospective structural corridors associated with uranium mineralization. EM inversion modelling is now complete over the northeastern section of the Angikuni basin, inclusive of the Lac 50 trend and sections of the RIB-Nine Iron trend -- from the KU discovery to the Nine Iron discovery. Lac 50 trend: The EM inversion modelling proved successful in mapping structural corridors hosting the currently defined footprint of mineralization outlined in the exploration target. Outside of the Lac 50 exploration target area, numerous areas with structural complexities similar to the mineralized RIB corridor (MRC), have been identified and remain untested. KU discovery -- Nine Iron: Beyond the current discoveries at KU and Nine Iron, numerous areas of intense structural complexity, similar to the MRC, have been identified and remain untested. Atha has now concluded the diamond drilling component of its highly impactful 2025 Angilak exploration program, which successfully tested regional exploration targets outside of the Lac 50 exploration target area. Two thousand twenty-five Angilak exploration program comprised 23 diamond drill holes totalling 10,774 m and resulted in the discoveries of five new areas of uranium mineralization along the 31 km RIB-Nine Iron trend; All mineralized drill core samples have been submitted for analysis and assay results are pending. The company anticipates receiving results from other components of the 2025 Angilak exploration program within Q4 2025. Troy Boisjoli, chief executive officer, commented: "The successful results from Mushroom Lake and KU discovery continue to demonstrate the Angilak difference. The 2025 Angilak exploration program was an unprecedented success with five new discoveries along the RIB-Nine Iron trend and the effective application of EM inversion providing a road map to discovery. The company has transformed the Angilak uranium project and set the stage for what will be a catalyst filled 2026. At a time when the world is looking to stable jurisdictions to supply the nuclear renaissance with the raw materials it needs to make it happen, Atha Energy is primed to help answer those demands." Cliff Revering, vice-president of exploration, added: "The 2025 Angilak exploration program was designed with two core objectives: expanding the mineralization footprint at the Lac 50 deposit and advancing two high-priority regional targets -- KU and RIB -- located along the RIB-Nine Iron trend. The program not only met these objectives but also exceeded expectations, yielding multiple new discoveries at both KU and RIB. A key highlight was the identification of a 12 km long structural corridor associated with uranium mineralization, anchored by the significant new discovery at RIB North. "The 3-D inversion modeling of the 2024 MMT survey data, developed by Expert Geophysics, has proven to be a highly reliable tool for mapping prospective structural corridors tied to uranium mineralization and has substantially enhanced our targeting strategy. The most recent 3-D inversion model covering the Lac 50, KU and Nine Iron areas, further highlights numerous prospective trends and structural complexities comparable to those already drill-tested and confirmed within the RIB mineralized corridor. "With the successful completion of the 2025 Angilak exploration program, I want to extend my gratitude to our dedicated employees, contractors and service providers. Their commitment enabled us to achieve these significant technical milestones while upholding the highest standards of safety and environmental stewardship. At Atha, we firmly believe that technical success must go hand in hand with rigorous safety and environmental practices, and we deeply value the effort and professionalism of everyone involved in our operations." The company is also pleased to announce the results from the latest round of Expert Geophysics Ltd.'s advanced electromagnetic inversion (EM inversion) modelling of its 2024 MMT survey data. The company focused on modelling the northeastern section of the Angikuni basin, inclusive of the Lac 50 trend and sections of the RIB-Nine Iron trend -- from the KU discovery to the Nine Iron discovery. Across the Lac 50 trend and the RIB-Nine Iron trend, the EM inversion modelling highlights prospective trends coincident with identified uranium mineralization drill tested in 2025. Furthermore, the latest round of modelling has identified numerous additional high-priority targets within the project area. Market-making services Atha is also pleased to announce that it has engaged the services of ICP Securities Inc. to provide market-making services in compliance with the policies and guidelines of the TSX Venture Exchange and other applicable legislation. ICP will be paid a monthly fee of $7,500, plus applicable taxes, which will be payable within five business days of the receipt of an invoice from ICP by the company, which will be provided on the first day of every month. The market-making services agreement between the company and ICP is dated effective Nov. 3, 2025, and is for an initial term of three months. The agreement will automatically renew for subsequent one-month terms unless either party provides at least 30 days written notice prior to the end of the initial term or additional term, as applicable. There are no performance factors contained in the agreement and no stock options or other compensation in connection with the engagement of ICP by the company. ICP and its clients may acquire an interest in the securities of the company in the future. ICP is an arm's-length party to the company. ICP's market-making activity will be primarily to correct temporary imbalances in the supply and demand of the company's shares. ICP will be responsible for the costs it incurs in buying and selling the company's shares, and no third party will be providing funds or securities for the market-making activities. ICP is a closely held Canadian corporation and an arm's-length party to the company. ICP and its affiliates do not own any securities in the company. Down hole gamma probe Core samples are submitted to the Saskatchewan Research Council (SRC) geoanalytical laboratories in Saskatoon. The SRC facility is ISO/IEC 17025:2005 accredited by the Standards Council of Canada. The samples are analyzed for a multielement suite using partial and total digestion inductively coupled plasma methods, for boron by Na2O2 fusion, and for uranium by fluorimetry. Qualified person The scientific and technical information contained in this news release have been reviewed and approved by Cliff Revering, PEng, vice-president, exploration, of Atha, who is a qualified person as defined under National Instrument 43-101 -- Standards of Disclosure for Mineral Projects. About Atha Energy Corp. Atha is a Canadian mineral company engaged in the acquisition, exploration and development of uranium assets in the pursuit of a clean energy future. With a strategically balanced portfolio including three 100-per-cent-owned postdiscovery uranium projects (the Angilak project located in Nunavut, and CMB discoveries in Labrador and the newly discovered basement hosted GMZ high-grade uranium discovery located in the Athabasca basin). In addition, the company holds the largest cumulative prospective exploration land package (greater than seven million acres) in two of the world's most prominent basins for uranium discoveries -- Atha is well positioned to drive value. Atha also holds a 10-per-cent carried interest in key Athabasca basin exploration projects operated by NexGen Energy Ltd. and IsoEnergy Ltd. We seek Safe Harbor.