ATHA Energy Makes Major New Discovery Along the Rib Corridor; Drills Best Exploration Hole to Date at the Angilak Uranium Project Intersecting 26.3 M of Composite Uranium Mineralization
ATHA ENERGY MAKES MAJOR NEW DISCOVERY ALONG THE RIB
CORRIDOR; DRILLS BEST EXPLORATION HOLE TO DATE AT THE
ANGILAK URANIUM PROJECT INTERSECTING 26.3 M OF
COMPOSITE URANIUM MINERALIZATION
HIGHLIGHTS
• Major new discovery within the Mineralized RIB Corridor (“MRC”), the RIB North Discovery,
located ~1.4 km along strike from the nearest drillhole at the RIB East Discovery (Figures 1
& 2);
• The first hole at RIB North , RIBN -DD-001, represents the most robust mineralized
intersection to date within the MRC , and one of the most sig nificant intersections within
the Angilak Uranium Project (Figure 3);
• Drillhole RIBN -DD-001, intersected 2 6.3 m of total composite uranium mineralization
including 1.9 m of high -grade2, over 1 0 zones from 345.55 m to 460.05 m . The hole
intersected 13.6 m of continuous mineralization (from 426.25 m to 439.85 m) including 1.7
m of high -grade mineralization2 with maximum radioactivity of 55,730 counts per second
(CPS1);
• Mineralization was initially intersected directly above the unconformity (located at
356.7m), extending into graphitic basement rock. The widest intersections are basement
hosted vein style uranium mineralization, associated with strong hematite alteration,
graphitic structures and overprinting silicification – similar in style and widths observed in
Athabasca basement hosted deposits;
• Uranium mineralization along the eastern limb of the MRC has now been intersected over
a potential 4.4 km strike length, extending from RIB South to RIB North (Figure 2);
• Along the parallel western limb of the MRC , the Company has intersected mineralization
over an additional ~4.0 km with drillhole RIBW -DD-003, located ~1.5 km to the north of
RIBW-DD-002 (See Sept. 18, 2025, News Release) (Figure 2);
Troy Boisjoli, CEO commented: ”The newest drillhole results from the RIB North Discovery, situated
along the Mineralized RIB Corridor (MRC), represent a distinct achievement, not only for the 2025
Angilak Exploration Program, but for the Company as a whole. They demonstrate that the An gilak
Uranium Project has the potential to host thick, high-grade, basement hosted uranium mineralization
on scale similar to what is found in the Athabasca Basin. From my previous experience working in both
exploration and pr oduction across the Athabasca Basin, I am keenly aware of the geological
characteristics of basement hosted style uranium deposits. ATHA’s first hole at the RIB North Discovery,
RIBN-DD-001, displays similar grades and thicknesses as other discovery holes from major basement
deposits. When coupling the results from RIB North with the cumulative discoveries made across the
12 km long MRC, the evidence is stacking up that the MRC has the potential to host discoveries like
those found along the Patterson Lake Corridor. Angilak has the makings of Canada’s newest uranium
jurisdiction, and this comes on the heels of the recent announcement by the US government for the
need to increase their strategic reserves beyond the current 14 -month stockpile – the US’ current
annual demand is ~50 million lbs U3O8. The Company couldn’t be more excited about the trajectory of
success at our Angilak Uranium Project and the entire uranium sector as whole.”
Cliff Revering, VP Exploration added: “We continue to see compelling evidence of the immense
potential within the RIB regional target area. Our team has now discovered uranium mineralization
across a 12 km graphitic structural corridor, and the results from the first RIB North drillhole , located
over 1.4 km away from the nearest drilling, demonstrate impressive scale and continuity. These results
highlight how our technical team is successfully translating a robust targeting strategy into meaningful
new discoveries and set us up for a very exciting year ahead . Our thesis that the Angikuni Basin is an
emerging new uranium district with substantial scale potential is steadily being validated.”
Vancouver, British Columbia, September 23rd, 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 RIB W-
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.
MRC Eastern Limb
Two additional drillholes were completed , RIBN-DD-001 and RIBS -DD-001, representing two new
discoveries at RIB North and RIB South, both situated along the eastern limb of the MRC (Figure 2).
At RIB North, situated ~1.5 km northeast from the previously announced RIB East Discovery, maiden
drillhole RIBN -DD-001, represents the best exploration drillhole to date at the Angilak Uranium
Project. RIBN-DD-001, intersected 26.3 m of total composite uranium mineralization, including 1.9 m
of high-grade2, over 10 zones from 345.55 m to 460.05 m (Figure 3). The hole intersected 13.6 m of
continuous mineralization (from 426.25 m to 439.85 m) including 1.7 m of high-grade mineralization2
with maximum radioactivity of 55,730 CPS1. Mineralization was first intersected directly above the
unconformity located at 356.7 m, extending into graphitic basement rock. The widest intersections
are basement hosted, vein style uranium mineralization, associated with strong hematite alteration,
graphitic structures and overprinting silicification – similar in style and widths observed in Athabasca
basement hosted deposits.
One drillhole was completed at RIB South, located ~2.25 km to the south from the previously
announced RIB East Discovery. The maiden drillhole, RIBS -DD-001, intersected low -grade
mineralization over three zones with total composite mineralization of 2.1 m2 (Figure 4).
MRC Western Limb
Along the western limb of the MRC , one additional drillhole , RIBW-DD-003, located ~ 1.5 km from
RIBW-DD-002 (See Sept. 18th, 2025, News Release ) has been completed. Drillhole RIBW -DD-003,
intersected continuous uranium mineralization over 1.8 m including 0.2 m of high -grade
mineralization2. The mineralized interval intersected between 234.15 m and 235.98 m had an average
radioactivity of 2,635 CPS1 and a peak of 16,030 CPS1 (Figure 5).
Figure 1: Angilak Project Area – 2025 Exploration Target Area (Black Rectangles), Mineralized RIB Corridor (Red
Rectangles), & Mapped Historic Mineralized Showings
Figure 2: 2025 Angilak Exploration Program – EM Inversion Model &Drill Collar Locations from Mineralized RIB
Corridor
Table 1: 2025 Angilak Exploration Program Drill Collar Information
Hole ID Trend Zone Azimut
h (°)
Dip
(°)
Easting
(mE)
Northing
(mN)
Elevation
(m)
Final
Depth (m)
*RIBE-DD-
001
RIB-Nine
Iron
RIB
East 145 -55 497928 6929449 270 443
*RIBE-DD-
002
RIB-Nine
Iron
RIB
East 145 -55 497766 6929322 271 345
*RIBE-DD-
003
RIB-Nine
Iron
RIB
East 145 -63 497524 6929337 271 398
*RIBE-DD-
004
RIB-Nine
Iron
RIB
East 145 -60 497404 6920180 271 428
*RIBE-DD-
005
RIB-Nine
Iron
RIB
East 155 -65 497530 6929401 270 472
*RIBE-DD-
006
RIB-Nine
Iron
RIB
East 145 -60 497670 6929501 273 491
*RIBE-DD-
007
RIB-Nine
Iron
RIB
East 325 -50 497798 6929101 274 467
*RIBE-DD-
008
RIB-Nine
Iron
RIB
East 325 -55 498284 6929287 264 464
*RIBW-
DD-001
RIB-Nine
Iron
RIB
West 150 -50 495831 6929490 274 503
*RIBW-
DD-002
RIB-Nine
Iron
RIB
West 145 -55 497766 6929322 271 380
RIBW-DD-
003
RIB-Nine
Iron
RIB
West 325 -55 497645 6930031 275 347
RIBN-DD-
001
RIB-Nine
Iron
RIB
North 300 -65 499574 6929887 261 623
RIBS-DD-
001
RIB-Nine
Iron
Rib
South 150 -50 495747 6927640 277.5 377
*Previously released drillholes from 2025 Angilak Exploration Program
Figure 3: Striplog RIBN-DD-001 showing radioactivity based on 40TGU-1000 Triple Gamma Down Hole
Probe1 & 2.
Figure 4: Striplog RIBS-DD-001 showing radioactivity based on 40TGU-1000 Triple Gamma Down Hole
Probe1 & 2.
Figure 5: Striplog RIBW-DD-003 showing radioactivity based on 40TGU-1000 Triple Gamma Down Hole
Probe1 & 2.
Down Hole Gamma Probe
1.A Mount Sopris 40TGU-1000 Triple Gamma Geiger down hole probe was utilized for radiometric
surveying.