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F3 - Starts Geophysics at Tetra Zone to Generate New Drill Targets

Drill Results

F3 - Starts Geophysics at Tetra Zone to

Generate New Drill Targets

Kelowna, British Columbia--(Newsfile Corp. - June 3, 2026) -

F3 Uranium Corp

(

TSXV: FUU

)

(

OTCQB: FUUFF

) ("

F3

" or "

the Company

") is pleased to announce the commencement of a DIAS32

IP and resistivity geophysical survey at its 100% owned Broach Lake Property, where F3 intersected

high-grade uranium mineralization at the Tetra Zone (see news release July 7, 2025). This survey is

designed as an initial characterization survey directly over the Tetra Zone and consists of three lines,

aiming to image chargeability and resistivity distributions related to the Tetra structure in 3D. The

purpose of the survey is to generate drill targets along the Tetra Zone system by imaging the resistivity

contrast associated with the mineralized structure.

This work stands to advance the next phase of drilling near F3's newest high-grade uranium discovery

and, more importantly, to guide step-out drilling along strike from the Tetra Zone, positioning the

Company to expand the footprint of the Tetra mineralized system. The survey is underway and is

expected to take approximately 30 days to complete.

Drill core physical properties investigations conducted at the University of Saskatchewan identified

measurable resistivity contrasts through the structure hosting the Tetra Zone, with the structure showing

lower resistivity than the surrounding host rocks. This IP survey aims to identify this contrast from surface,

which will then be integrated with the conductive responses from previous ground EM surveys performed

over the area.

The Tetra Zone has an unusual geophysical signature: it lacks the conductive minerals (graphite and

sulphides) commonly associated with uraniferous structures, and the area is overlain by highly

conductive Cretaceous mudstone that introduces significant noise. This resistivity survey is intended to

help generate drill targets along the Tetra Zone system despite those challenges. Upon successful

completion and interpretation, F3 intends to expand the survey coverage along strike in both directions.

Sam Hartmann, Vice President Exploration, commented:

"The Tetra Zone discovery has been game changing. It marked the first uranium discovery within the

Clearwater Domain, a geological domain characterized by an extremely high magnetic profile and

historically weak conductor responses. As a result, there has been very little historic exploration; F3 was

the first mover in adopting and implementing new deposit theories that translated into discovery during

our first exploration drill program.

"Many uranium discoveries in the basin are considered 'blind' and rely heavily on geophysics, given the

general lack of outcrop within the Athabasca Basin and the heavy Quaternary cover, particularly on the

west side and in the Patterson Lake area. The Tetra Zone is even more difficult due to the very weak

geophysical property contrast associated with the mineralized structure.

"What we do know is that we are on a potentially large system characterized by significant hydrothermal

alteration, with the Tetra Zone mineralization at its core. Historic drill hole PAT-16-002, located 1.2 km

southeast of Tetra, returned a 0.5-metre interval grading 423 ppm U, the highest uranium value recorded

in any single exploration core sample from the PLN Project outside of the JR and Tetra Zones (see news

release July 21, 2025). This is a trend we are focused on thoroughly understanding, given the significant

discovery potential. It's also important to understand the size of the PLN property and the numerous other

trends, several of which remain completely untested and a number of which we have been advancing to

the drill-ready stage. We look forward to providing a summer exploration update covering the Tetra area

and new target areas shortly."

Map 1. Broach Lake - Tetra Zone 3D-DCIP and Resistivity Survey

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/8110/299929_028d40a2c4cb0bbc_002full.jpg

About the Patterson Lake North Project:

The Company's 42,961-hectare 100% owned Patterson Lake North Project (PLN) is located just within

the south-western edge of the Athabasca Basin in proximity to Paladin's Triple R and NexGen Energy's

Arrow high-grade uranium deposits - a region poised to become the next major centre of development

for uranium operations in northern Saskatchewan. The PLN Project consists of the 4,074-hectare

Patterson Lake North Property hosting the JR Zone uranium discovery approximately 23 km northwest of

Paladin's Triple R deposit, the 19,864-hectare Minto Property, and the 19,022-hectare Broach Property

hosting the Tetra Zone, located 13 km south of the JR Zone. All three properties comprising the PLN

Project are accessed by Provincial Highway 955.

Qualified Person:

The technical information in this news release has been prepared in accordance with the Canadian

regulatory requirements set out in National Instrument 43-101 and approved on behalf of the company by

Raymond Ashley, P.Geo., President & COO of F3 Uranium Corp, a Qualified Person. Mr. Ashley has

reviewed and approved the data disclosed.

This news release also refers to neighbouring properties in which F3 Uranium has no interest, and the

Qualified Person has been unable to verify the information from those properties. Mineralization on those

neighbouring properties is not necessarily indicative of mineralization on the PLN Project.

For additional information on the PLN Project, including the current mineral resource estimate for F3

Uranium's JR Zone uranium deposit, please refer to the report titled "NI 43-101 Technical Report,

Patterson Lake North Project, Northern Saskatchewan, Canada" dated January 20, 2026, available at

www.sedarplus.ca

.

About F3 Uranium Corp.:

F3 is a uranium exploration company, focusing on the high-grade JR Zone and new Tetra Zone

discovery 13 km to the south in the PW area on its Patterson Lake North (PLN) Project in the Western

Athabasca Basin. F3 currently has three properties in the Athabasca Basin: Patterson Lake North,

Minto, and Broach. The western side of the Athabasca Basin, Saskatchewan, is home to some of the

world's largest high-grade uranium deposits including Paladin's Triple R project and NexGen's Arrow

project.

Forward Looking Statements

This news release contains certain forward-looking statements within the meaning of applicable

securities laws. All statements that are not historical facts, including without limitation, statements

regarding future estimates, plans, programs, forecasts, projections, objectives, assumptions,

expectations or beliefs of future performance, including statements regarding the suitability of the

Properties for mining exploration, future payments, issuance of shares and work commitment funds,

entry into of a definitive option agreement respecting the Properties, are "forward-looking statements."

These forward-looking statements reflect the expectations or beliefs of management of the Company

based on information currently available to it. Forward-looking statements are subject to a number of

risks and uncertainties, including those detailed from time to time in filings made by the Company with

securities regulatory authorities, which may cause actual outcomes to differ materially from those

discussed in the forward-looking statements. These factors should be considered carefully and readers

are cautioned not to place undue reliance on such forward-looking statements. The forward-looking

statements and information contained in this news release are made as of the date hereof and the

Company undertakes no obligation to update publicly or revise any forward-looking statements or

information, whether as a result of new information, future events or otherwise, unless so required by

applicable securities laws.

The TSX Venture Exchange and the Canadian Securities Exchange have not reviewed, approved or

disapproved the contents of this press release, and do not accept responsibility for the adequacy or

accuracy of this release.

F3 Uranium Corp.

750-1620 Dickson Avenue

Kelowna, BC V1Y 9Y2

Contact Information

Investor Relations

Telephone: 778 484 8030

Email:

[email protected]

ON BEHALF OF THE BOARD

"Dev Randhawa"

Dev Randhawa, CEO

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/299929