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IsoEnergy Ltd.

For the period ended Dec 31, 2025. Filed Feb 27, 2026.

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About this filing

The yearly report of certain Canadian companies, filed under a joint US and Canadian system. It is the main yearly account these companies give US investors, largely as filed in Canada.

FY2025 · Filed Feb 27, 2026

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ISOU$8.34+5.7%Stored close · as of Nov 6, 2026
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Contents

EX-99.1 · 2023 Work Program

2023 Work Program

Consolidated Uranium carried out a combined rotary and core drilling program at the Tony M Mine project during 2023, totaling approximately 16,240 feet in 21 drill holes. This drilling program, which was part of a proposed 59-hole drilling program recommended by SLR in the Tony M Technical Report, was designed to increase the density of drilling in certain areas of the Tony M project to upgrade certain inferred mineral resources to the indicated mineral resource category, and collect information on the occurrence of vanadium mineralization that is associated with uranium mineralization at the Tony M Mine. In particular, the 2023 drill hole locations were selected to evaluate a possible relationship of low-grade uranium mineralization with higher-grade vanadium mineralization.

Each of the 21 drill holes completed during the 2023 drilling program was logged by Century Geophysical Corporation, an independent geophysical contractor, with a continuous recording down-hole geophysical logging tool to collect gamma-ray, self-potential and resistivity data through the entirety of each drill hole. Equivalent uranium grades were calculated from the gamma-ray log responses in mineralized zones encountered in the drill holes. Lithologic descriptions were prepared from cuttings samples and from the core recovered from the drill holes. The core was split and sampled by Consolidated Uranium personnel and scanned with an Olympus portable XRF unit to detect the possible presence of vanadium mineralization. The samples were submitted to AAL, an ISO-17025 Accredited independent commercial laboratory, for chemical determination of uranium and vanadium grades encountered in the drill holes.

While the 2023 drill results did not demonstrate that there is an inverse relationship between low-grade uranium mineralization and high-grade vanadium, the 2023 drill holes did highlight the presence of high- grade vanadium in the Tony M uranium deposit. The drilling results further indicated a continuation of high-grade uranium mineralization in various parts of the Tony M Mine than was previously intersected by several of the historical drill holes. Overall, the results obtained from the 2023 drilling program are consistent with the results obtained from the historical drill holes that were drilled primarily by Plateau Resources, which discovered and first developed the Tony M Mine in the 1970s. The data obtained from this most recent drilling program is being utilized to refine the locations of additional drill holes for exploration purposes and to guide additional geotechnical studies at the Tony M Mine.

The following is a summary of the results from the 2023 drill program.

Hole IDFrom (ft)To (ft)Thickness (ft)Grade% U3O8(AAL)Grade % V2O5(AAL)
TM-010000unmineralizedweak
TM-011756.57570.5weakweak
TM-012000unmineralizedweak
TM-013769.57700.5weakweak
TM-01473974120.190.14
TM-01574174320.040.036
TM-016000weakweak
TM-01773273420.210.833
and75275310.14<0.01
TM-01873574160.510.98
TM-019000unmineralizedweak
TM-02074074440.401.023
and75775920.27weak
TM-021000unmineralizedweak
TM-022000unmineralizedweak
TM-0237557572unmineralizedweak
TM-02474875021.391.035
and75175430.510.379
TM-02574174650.400.147
TM-026000weakweak
TM-027000weakweak
TM-028000weakweak
TM-029000unmineralizedweak
TM-030000unmineralizedweak
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