F3 Proclaims Excessive Grade Area of 10.8 M lbs. at 12.23% U3O8 at JR Zone Uranium Deposit Inside an 11.8 M lbs. at 4.39% U3O8 Preliminary Indicated Mineral Useful resource

F3 Uranium Corp (TSXV: FUU,OTC:FUUFF) (OTCQB: FUUFF) (“F3” or “the Firm”) is happy to announce the outcomes of the preliminary Mineral Useful resource estimate of the JR Zone uranium deposit at its 100% owned PLN Property in Northern Saskatchewan.

Based mostly on all drillholes the JR Zone uranium deposit is estimated to include:

• 11,801,000 lbs U3O8 Indicated Mineral Useful resource based mostly on 121,259 tonnes at a median grade of 4.39% U3O8, together with:

  • Excessive Grade Area containing 10,788,000 lbs U3O8 based mostly on 39,997 tonnes at a median grade of 12.23% U3O8

The Mineral Useful resource has been estimated for the basement shear hosted JR Zone deposit completely and is solely labeled as Indicated.

Raymond Ashley, President & COO commented:

“With the JR Zone useful resource definition part now efficiently concluded, the corporate will flip its consideration to the recently-discovered Tetra Zone, simply 13km from JR Zone. This excessive grade Indicated useful resource, together with the potential of Tetra, units an thrilling stage for development within the new 12 months. The crew will pursue further high-impact targets throughout our in depth PLN land package deal, with a precedence give attention to Tetra. We’re effectively funded to advance drilling applications via 2026 with $26.1 million within the treasury as of December 18, 2025.”

Desk 1: Abstract of Mineral Sources – JR Zone Uranium Deposit, Efficient as of October 15, 2025

Estimation Methodology:

SLR Worldwide Company has estimated the JR Zone deposit Mineral Useful resource Estimate utilizing drill gap knowledge from 89 drill holes totaling 29,414m inside the JR Zone deposit accessible as of October 15, 2025. The Mineral Useful resource estimate was accomplished utilizing an unrotated, sub-blocked method. SLR constructed two distinct mineralized domains with a low grade area, representing the broader mineralized envelope, was interpreted utilizing a cut-off grade 0.1% U₃O₈ and modelled from 1.0 m composited drill knowledge and a excessive grade area with a minimal grade of 5.0% U₃O₈ solely encapsulated inside the low-grade area. Estimated block mannequin grades have been based mostly completely on chemical assays. Following detailed statistical and spatial evaluation SLR concluded that the applying of excessive grade capping was not justified because the distribution of excessive grade values doesn’t materially distort the general grade estimates. No Mineral Reserves have been estimated on the Challenge.

Given the restricted variability and the absence of well-defined anisotropy within the knowledge, grade estimation was carried out utilizing the inverse distance squared (ID²) interpolation methodology. A planar ellipsoid search technique was utilized to replicate the overall geometry of the mineralized zones and to make sure applicable spatial weighting throughout estimation.

Density values have been estimated from bulk density measurements collected from drill core samples with a median pattern size of 0.5m. For consistency with assay intervals utilized in useful resource estimation, density values have been composited to 1.0m intervals. A complete of 109 composite samples have been accessible within the excessive grade area and 396 composite samples within the low grade area. Block density was estimated utilizing Inverse Distance Squared (ID²) interpolation inside each the excessive grade and low grade mineralization domains utilizing the identical search technique as used for uranium grade.

All blocks labeled as Indicated Mineral Sources on the idea of drill spacing, geological confidence, and demonstrated continuity of mineralization inside the modelled mineralization domains. Doubtlessly mineable form volumes generated utilizing the Deswik Stope Optimizer (DSO) software program have been subsequently utilized to constrain Indicated blocks to volumes thought-about cheap for eventual financial extraction. The reported Mineral Sources embody inner dilution inside the underground MSO (Mineable Form Optimizer) form volumes. No further dilution or restoration elements have been utilized.

Extra Technical Particulars:

A Technical Report on the PLN Challenge and the JR Zone deposit Preliminary Useful resource Estimate ready by SLR Worldwide Company and in accordance with Nationwide Instrument 43-101 might be filed on SEDAR inside 45 days.

In regards to the Patterson Lake North Challenge:

The Firm’s 44,613-hectare 100% owned Patterson Lake North Challenge (PLN) is situated simply inside the south-western fringe of the Athabasca Basin in proximity to Paladin’s Triple R and NexGen Power’s Arrow high-grade uranium deposits, an space poised to change into the following main space of growth for brand new uranium operations in northern Saskatchewan. The PLN Challenge consists of the 4,074-hectare Patterson Lake North Property internet hosting the JR Zone uranium deposit roughly 23km northwest of Paladin’s Triple R deposit, the 20,675-hectare Minto Property, and the 19,022-hectare Broach Property internet hosting the Tetra Zone, F3’s latest discovery 13km south of the JR Zone deposit. All three properties comprising the PLN Challenge are accessed by Provincial Freeway 955.

Certified Particular person:

The Mineral Sources for the JR Zone deposit disclosed on this information launch have been ready in accordance with the Canadian regulatory necessities set out in Nationwide Instrument 43-101 and estimated by Mark Mathisen, C.P.G, an worker of SLR Worldwide Company and impartial of F3. Mr. Mathisen is a Certified Particular person in accordance with NI 43-101 and S-Okay 1300. The Mineral Sources have been labeled as Indicated in accordance with the CIM Definition Requirements (2014, adopted 2019), as integrated by reference in NI 43-101, that are in step with definitions in S-Okay 1300. Mr. Mathisen has reviewed and accepted the contents of this information launch because it pertains to the Mineral Useful resource estimate.

The scientific and technical data on this information launch apart from the useful resource estimate has been ready in accordance with the Canadian regulatory necessities set out in Nationwide Instrument 43-101 and accepted on behalf of the corporate by Raymond Ashley, P.Geo., President & COO of F3 Uranium Corp, a Certified Particular person. Mr. Ashley has reviewed and accepted the scientific and technical data disclosed on this information launch and verified the info disclosed.

This information launch could check with neighboring properties by which F3 Uranium has no curiosity, and the Certified Particular person has been unable to confirm the data from these properties. Mineralization on these neighboring properties shouldn’t be essentially indicative of mineralization on the PLN Challenge.

About F3 Uranium Corp.:

F3 is a uranium exploration firm, specializing in the high-grade JR Zone deposit and new Tetra Zone discovery 13km to the south within the PW space on its Patterson Lake North (PLN) Challenge within the Western Athabasca Basin. F3 at present has 3 properties within the Athabasca Basin: Patterson Lake North, Minto, and Broach. The western aspect of the Athabasca Basin, Saskatchewan, is dwelling to among the world’s largest excessive grade uranium deposits together with Paladin’s Triple R undertaking and NexGen’s Arrow undertaking.

Ahead-Trying Statements

This information launch comprises sure forward-looking statements inside the that means of relevant securities legal guidelines. All statements that aren’t historic info, together with with out limitation, statements relating to future estimates, plans, applications, forecasts, projections, targets, assumptions, expectations or beliefs of future efficiency, together with statements relating to the pursuit of further targets, anticipated drilling applications and different exploration plans and prospects for the Athabasca Basin and the Firm’s tasks, are “forward-looking statements.” These forward-looking statements replicate the expectations or beliefs of administration of the Firm based mostly on data at present accessible to it. Ahead-looking statements are topic to a lot of dangers and uncertainties, together with these detailed every now and then in filings made by the Firm with securities regulatory authorities, which can trigger precise outcomes to vary materially from these mentioned within the forward-looking statements. These elements needs to be thought-about fastidiously and readers are cautioned to not place undue reliance on such forward-looking statements. The forward-looking statements and data contained on this information launch are made as of the date hereof and the Firm undertakes no obligation to replace publicly or revise any forward-looking statements or data, whether or not because of new data, future occasions or in any other case, except so required by relevant securities legal guidelines.

The TSX Enterprise Trade has not reviewed, accepted or disapproved the contents of this press launch, and don’t settle for duty for the adequacy or accuracy of this launch.

ON BEHALF OF THE BOARD
“Dev Randhawa”
Dev Randhawa, CEO

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