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ATHA Files Updated Technical Reports

Technical Reports (NI 43-101)

ATHA FILES UPDATED TECHNICAL REPORTS

Vancouver, British Columbia, September 10, 2025 – ATHA Energy Corp. (TSX.V: SASK) (FRA: X5U) (OTCQB:

SASKF) (“ATHA” or the “Company”), as a result of a review by the British Columbia Securities Commission, the

Company is issuing the following news release to clarify certain disclosure. The Company announces today that it

has filed: (i) an updated technical report in respect of its CMB property located in Newfoundland and Labrador,

Canada dated July 8, 2025 and effective June 14, 2025 entitled “NI 43-101 Technical Report, Central Mineral Belt

Property, Newfoundland and Labrador, Canada” prepared by Stefan Kruse, Ph.D., P. Geo. of Terrane Geoscience

Inc.; and (ii) an updated technical report in respect of its Gemini property located in Saskatchewan, Canada dated

May 22, 2025 and effective February 10 , 202 4 entitled “Technical Report on the Gemini Project , Northern

Saskatchewan, Canada ” prepared by William Yeomans, B.Sc., P. Geo. Of Yeomans Geological Inc. , each in

accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). Copies

of the technical reports are available under the Company’s SEDAR+ profile at www.sedarplus.ca.

The Company has also updated certain disclosures on its website, investor presentation and other materials in

connection with the foregoing.

Qualified Person

Cliff Revering, P.Eng., Vice President, Exploration of the Company and a qualified person in accordance with NI

43-101, has reviewed and approved of the scientific and technical disclosure in this news release.

About ATHA

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%-owned uranium

projects (the Angilak Project in Nunavut, CMB Discoveries in Labrador, and the basement hosted GMZ zone located

in the Athabasca Basin). In addition, the Company holds the largest cumulative prospective exploration land

package (>7 million acres) in two of the world’s most prominent basins for uranium discoveries – ATHA is well

positioned to drive value. AT HA also holds a 10% carried interest in key Athabasca Basin exploration projects

operated by NexGen Energy Ltd. and IsoEnergy Ltd. For more information visit www.athaenergy.com.

On Behalf of the Board of Directors

Troy Boisjoli

CEO and Director

ATHA Energy Corp.

For more information, please contact:

Troy Boisjoli

Chief Executive Officer and Director

Email: [email protected]

www.athaenergy.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the

TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.