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F3 More Than Doubles Tetra Zone Length to 135m

Exploration Programs

F3 More Than Doubles Tetra Zone Length to

135m

Kelowna, British Columbia--(Newsfile Corp. - January 13, 2026) -

F3 Uranium Corp

(TSXV: FUU)

(OTCQB: FUUFF)

("

F3

" or "

the Company

") is pleased to announce final scintillometer results from its

2025 fall drill program on the Tetra Zone on the Broach Property. The program consisted of five diamond

drill holes totaling 2,628m and

extended the interpreted mineralized plunge length

from

60m to

135m, an increase of 125%.

Sam Hartmann, Vice President Exploration, commented:

"The fall 2025 program was designed to test the plunge continuity of uranium mineralization in the Tetra

Zone shear. Drilling extended the known mineralized plunge length from 60m to 135m. On the down-

plunge (western) side, holes PLN25-220A and PLN25-220AW1 tested continuity but appear to have

intersected the structure just above the expected mineralized zone, with radioactivity and broader

shearing observed in PLN25-220A. On the up-plunge (eastern) side, PLN25-221 confirmed continuity,

stepping out approximately 28m from PLN25-205 (see news release, July 16, 2025). The roughly 300m

of shear zone remaining in the up-plunge direction toward the Athabasca Unconformity, along with the

down-plunge extent, represent first order priority areas for follow-up drilling, which we are planning to

start later this month. Assays from the fall program, including PLN25-217, which intersected

mineralization over a total of 29.5m, 27.5m of which is continuous and includes 2.30m of >10,000 cps

between 396.70m and 407.30m, are currently at SRC and will be released as they become available."

Fall 2025 Handheld Spectrometer Highlights:

Tetra Zone

PLN25-221

(line 11310S):

2.0m radioactivity between 333.5m and 335.5m, and

8.5m radioactivity between 338.0m and 346.5m with a peak of 4,500 cps, and

0.5m radioactivity between 351.0m and 351.5m

Table 1. Drill Hole Summary and Handheld Spectrometer Results

Collar Information

*Hand-held Spectrometer Results On

Mineralized Drillcore (>300 cps / >0.5m

minimum)

Athabasca

Unconformity

Depth (m)

Total

Drillhole

Depth

(m)

Hole ID

Section

Line

Easting

Northing

Elevation

Az

Dip

From (m)

To

(m)

Interval

(m)

Max CPS

PLN25-

220

11220S

589363

6397965

584

2

-76

Hole Abandoned

N/A

143

PLN25-

220A

11220S

589364

6398037

583

4

-85

421.00

421.50

0.50

310.00

164

584

PLN25-

220AW1

11220S

589364

6398037

583

4

-85

Tetra Zone Exploration; no radioactivity

>300cps

N/A

551

PLN25-

221

11310S

589460

6398040

585

49

-86

333.50

334.00

0.50

930

153

419

334.00

334.50

0.50

1800

334.50

335.00

0.50

690

335.00

335.50

0.50

300

338.00

338.50

0.50

350

338.50

339.00

0.50

310

339.00

339.50

0.50

730

339.50

340.00

0.50

850

340.00

340.50

0.50

610

340.50

341.00

0.50

340

341.00

341.50

0.50

440

341.50

342.00

0.50

550

342.00

342.50

0.50

1500

342.50

343.00

0.50

1500

343.00

343.50

0.50

4500

343.50

344.50

1.00

<300

344.50

345.00

0.50

300

345.00

346.00

1.00

<300

346.00

346.50

0.50

530

351.00

351.50

0.50

570

Handheld spectrometer composite parameters:

1: Minimum Thickness of 0.5m

2: CPS Cut-Off of 300 counts per second

3: Maximum Internal Dilution of 2.

0m

Map 1. Tetra Zone Scintillometer Results - Plan Map

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

https://images.newsfilecorp.com/files/8110/280174_dbf69dd3b401fa50_003full.jpg

Image 1. Tetra Zone Scintillometer Results - Long Section

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

https://images.newsfilecorp.com/files/8110/280174_dbf69dd3b401fa50_004full.jpg

The natural gamma radiation detected in the drill core, as detailed in this news release, was measured

in counts per second (cps) using a handheld Radiation Solutions RS-125 spectrometer which has been

calibrated by Radiation Solutions Inc. The Company designates readings exceeding 300 cps on the

handheld spectrometer (occasionally referred to as a scintillometer in industry terminology; this stems

from historical naming conventions and the shared functionality of detecting gamma radiation between a

spectrometer and a scintillometer)-as "anomalous", readings above 10,000 cps as "highly radioactive",

and readings surpassing 65,535 cps as "off-scale". However, readers are cautioned that spectrometer

or scintillometer measurements often do not directly or consistently correlate with the uranium grades of

the rock samples and should be regarded solely as a preliminary indicator of the presence of radioactive

materials.

Samples from the drill core are split into half sections on site. Where possible, samples are

standardized at 0.5m down-hole intervals. One-half of the split sample is sent to SRC Geoanalytical

Laboratories (an SCC ISO/IEC 17025: 2005 Accredited Facility) in Saskatoon, SK while the other half

remains on site for reference. Analysis includes a 63 element suite including boron by ICP-OES, uranium

by ICP-MS and gold analysis by ICP-OES and/or AAS.

The Company considers uranium mineralization with assay results of greater than 1.0 weight % U

3

O

8

as

"high grade" and results greater than 20.0 weight % U

3

O

8

as "ultra-high grade".

All depth measurements reported are down-hole and true thicknesses are yet to be determined.

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, an area poised to become the next major area of development for

new 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 23km northwest of

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

hosting the Tetra Zone, F3's newest discovery 13km 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 may refer to neighboring 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

neighboring properties is not necessarily indicative of mineralization on the PLN Project. For additional

information on the PLN Project, please refer to the report titled "Technical Report on the Patterson Lake

North Project, Northern Saskatchewan, Canada" prepared by SLR International Corporation with a

signing date of January 25, 2023and an effective date of November 20, 2023 available at

www.sedarplus.ca, and prepared in accordance with NI 43-101.

About F3 Uranium Corp.:

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

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

Athabasca Basin. F3 currently has 3 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 V1Y9Y2

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/280174