ATHA Energy Unveils High-Grade Uranium Find at Lac 50

• The Lac 50 Northwest Discovery is part of ATHA's on-going 2026 Angilak Exploration Program, the Company anticipates announcing additional preliminary results from drilling at the Mineralized RIB Corridor imminently.

Troy Boisjoli, CEO commented: "Over the last two decades I have had the privilege of exploring the top uranium districts globally - including Cameco's Rabbit Lake trend and NexGen's world class Rook I Project. It is with that experience, when I look at the exploration results from Angilak over the last two years - successfully intersecting uranium mineralization on 100% of our regional exploration targets, now with six discoveries in just fifteen months of work - Angilak is something truly unique, representing something completely new in the uranium exploration space. Today's results from the Lac 50 Northwest Discovery, intersecting high-grade uranium mineralization 4 km along strike from the Lac 50 Deposit area and the nearest drilling, demonstrates the unrealized potential of Angilak, as well as the Company's ability to execute.

ATHA's success is ever more impactful when considering projections for increases in global energy demand, and prominence of nuclear energy in plans to meet those needs. Compounding those demands with issues of stability of commodity supplies from stable jurisdictions, and ATHA's Angilak Uranium Project has a very bright future."

Cliff Revering, VP Exploration added: "The discovery of a new high-grade mineralized zone more than 4 km from the Lac 50 Deposit, along the extended Lac 50 Northwest Corridor and in only the second hole drilled in this area, marks an exciting step forward for the Angilak Project. These results reinforce the strength of our targeting strategy and highlight the significant exploration upside within the Angikuni Basin.

Building on the success of our 2025 exploration program, we are highly encouraged by the continued discovery momentum at Angilak. Early results from the 2026 program further support our view that Angilak has the scale, continuity and exploration potential to emerge as a significant uranium district."

VANCOUVER, BC / ACCESS Newswire / July 8, 2026 / ATHA Energy Corp. (TSXV:SASK)(FRA:X5U)(OTCQX:SASKF) ("ATHA" or the "Company"), is pleased to announce diamond drilling results from the 2026 Angilak Exploration Program at its 100%-owned Angilak Uranium Project in Nunavut, Canada. Today's release details preliminary results from the first two drill holes targeting Lac 50 Northwest. The second hole, L50W-DD-002, resulted in the discovery of high-grade uranium mineralization 4 km along strike from the Lac 50 Deposit area. L50W-DD-002, intersected 11.5 m of total composite uranium mineralization² over five zones from 305.0 m to 479.9 m, with 7.0 m of continuous mineralization (from 415.6 m to 422.6 m) averaging 7,974 counts per second (CPS¹) including 1.6 m of high-grade mineralization² with maximum radioactivity of 40,162 CPS¹ (Figure 2 & Table 1). Mineralization is basement-style, hosted within brecciated basalts, infilled with quartz-carbonite veining, displaying albite-hematite alteration halos and silicification overprinting. The mineralization demonstrates similar grade, width and style to Athabasca basement-style deposits. Drilling at the Lac 50 Northwest Discovery was designed to test a 3D MMT inversion anomaly with a coincident broad gravity offset. Results from L50W-DD-002 confirm the entire 4 km strike length between the Lac 50 Northwest Discovery and the Lac 50 Deposit area as being prospective to host uranium mineralization.

The 2026 Angilak Exploration Program is largest to date on the project, comprising two components: First, diamond drilling, which commenced operations on May 1^st, 2026, scheduled to continue through the end of September. The Company will complete ~20,000 m, utilizing three diamond drill rigs. Second, aerial geophysics, comprising Expert's MMT survey, scheduled to start early July, with resulting 3D Inversion Modeling to be completed by Q4 2026.

With diamond drilling the Company intends to test the following areas:

• 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, 3D Inversion targets along strike from the main Lac 50 Deposit area, and expansion of the Lac 50 Deposit mineralization footprint which remains open and unconstrained³.

• KU-Nine Iron Corridor: Testing recently identified, highly prospective, 3D Inversion targets, which directly vector from uranium mineralization intersected in the 2025 KU and historic Nine Iron Discoveries.

While the geophysics portion of the program is designed to provide additional targets to the Company's portfolio, and consists of:

• Angikuni Basin: Acquiring full MMT coverage across the 100% ATHA-owned Angikuni Basin. The resulting survey data will be used to develop a 3D Inversion model of the entire Angikuni Basin, the same highly successful systematic approach ATHA utilized during its 2025 campaign, adding to ATHA's already extensive portfolio of regional targets.

Figure 1: Angilak Project Area - 2026 Exploration Target Area (Black Rectangles), & Mapped Historic Mineralized Showings

Table 1: 2026 Angilak Exploration Program Drill Collar Information

Figure 2: Striplog L50W-DD-002 showing radioactivity based on 40TGU-1000 Triple Gamma Down Hole Probe^{1 & 2}.

Figure 3: Striplog L50W-DD-001 showing radioactivity based on 40TGU-1000 Triple Gamma Down Hole Probe^{1 & 2}.

Down Hole Gamma Probe

^1.A Mount Sopris 40TGU-1000 Triple Gamma Geiger down hole probe was utilized for radiometric surveying.

²The Company considers high-grade mineralization to be any interval with radioactivity derived from downhole gamma probe >10,000 CPS. The total gamma results provided were selected using an average cutoff of >300 CPS over intervals of 0.1 metre width. Mineralization was previously described as >500 CPS, however, based on assay results from 2024 & 2025, the Company has now lowered that threshold to >300 CPS, as typical results above 300 CPS return grades above 0.01% U₃O₈. All drill intercepts are core width and true thickness is yet to be determined.

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 (scope of accreditation #537). The samples are analyzed for a multi-element suite using partial and total digestion inductively coupled plasma methods, for boron by Na2O2 fusion, and for uranium by fluorimetry.

Disclaimer for Historical Drilling and Outcrop Samples

Certain noted technical information provided herein has been derived exclusively and without independent verification from the following reports. Such information is historical in nature and is not considered by the Company to be current. In each case, the reliability of the historical information is considered reasonable by the Company. The historical information provides an indication of the exploration potential of the properties but may not be representative of expected results. Readers should read the entirety of such noted reports to fully understand the nature of the information referenced herein. Samples, including, without limitation, outcrop samples, by their nature, are selective in nature and significant variations may be seen from sample to sample. Accordingly, sample information may not be representative of the true underlying mineralization.

References for Historic Diamond Drilling Results and Surficial Sampling

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