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F3 - Hits Radioactivity in 32m Step Out - Extending Zone at Broach Lake Mobilizes Sonic Drill to Tetra Zone

Exploration Programs

F3 - Hits Radioactivity in 32m Step Out -

Extending Zone at Broach Lake

Mobilizes Sonic Drill to Tetra Zone

Kelowna, British Columbia--(Newsfile Corp. - June 24, 2025) -

F3 Uranium Corp

.

(TSXV: FUU)

(OTCQB: FUUFF)

("

F3

" or "

the Company

") is pleased to announce strike growth of the radioactivity at

the PW Area on the Broach Property — now named the Tetra Zone with PLN25-210 which intersected a

total of

21.0m composite radioactivity

in a

32m step-out

along strike to the northwest from discovery

hole PLN25-205 which intersected radioactivity over a total of 33.0m including 0.56m of high

radioactivity (>10,000 cps) with a peak of 37,700 cps at 398.34m (see NR April 15, 2025). The Tetra

Zone remains open in both directions and drilling is continuing.

Geophysical and structural modeling of the Tetra Zone is advancing, and F3 is now mobilizing an LS600

Sonic drill to the Zone; this will improve the pace of overburden casing and increase targeting accuracy

— a technique deployed successfully at the JR Zone during delineation drilling.

2025 Handheld Spectrometer Highlights:

Broach Lake: Tetra Zone

PLN25-210 (line 11280S):

0.5m interval with radioactivity of 700 cps between 165.0 and 165.5m, and

0.5m interval with radioactivity of 450 cps between 308.0 and 308.5m, and

0.5m interval with radioactivity of 690 cps between 332.0 and 332.5m, and

2.0m interval with radioactivity of 340 cps between 349.0 and 351.0m, and

3.0m interval with radioactivity of 1,500 cps between 354.5 and 357.5m, and

0.5m interval with radioactivity of 920 cps between 364.0 and 364.5m, and

3.5m interval with radioactivity of 900 cps between 367.5 and 371.0m, and

3.5m interval with radioactivity of 1,200 cps between 380.0 and 383.5m, and

7.0m interval with radioactivity of 2,600 cps between 388.5 and 395.5m

Sam Hartmann, Vice President Exploration, commented:

"Bringing a Sonic drill back to site will allow us to more efficiently define, delineate and expand the highly

radioactive core seen in PLN25-205. PLN25-210 represents a 32m step out grid west and validated our

geological and structural models, which will be used for further along strike drilling. The sonic drill will

help reduce drill trace deviation as seen in PLN25-207 and allow for intersection of the target areas

exactly where intended. Assays from the discovery hole PLN25-205 are being rushed and the results will

be released once complete and reviewed. Overall, we are very encouraged by the geology in these

initial drill holes at Tetra, which is currently the best exploration target in the F3 portfolio."

Map 1. Tetra Zone at Broach Lake Property -2025 Scintillometer Results

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

https://images.newsfilecorp.com/files/8110/256570_f95f1717f4538a7c_002full.jpg

Image 1. Cross Section Line 11280S

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

https://images.newsfilecorp.com/files/8110/256570_f95f1717f4538a7c_003full.jpg

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-

205

11310S

589327

6397941

583

46

-65

647.50

648.00

0.50

340

168.8

725

663.00

663.50

0.50

330

PLN25-

206

11325S

589315

6397929

584

48

-65

317.50

318.00

0.50

330

161.9

740

318.00

318.50

0.50

350

PLN25-

207

11505S

589481

6397809

587

46

-66

280.00

280.50

0.50

480

154.4

674

280.50

281.00

0.50

320

621.00

621.50

0.50

1200

PLN25-

208

11205S

589824

6398440

576

43

-70

162.50

163.00

0.50

320

165.7

623

PLN25-

209

11280S

hole abandoned; no radioactivity >300 cps

180.3

221

PLN25-

209A

11280S

589343

6397999

583

47

-71

329.50

330.00

0.50

400

182.0

488

PLN25-

210

11280S

589341

6397997

583

47

-73

165.00

165.50

0.50

700

166.1

527

308.00

308.50

0.50

450

332.00

332.50

0.50

690

349.00

349.50

0.50

300

350.50

351.00

0.50

340

354.50

355.00

0.50

520

355.50

356.00

0.50

1100

356.00

356.50

0.50

570

357.00

357.50

0.50

1500

364.00

364.50

0.50

920

367.50

368.00

0.50

900

369.50

370.00

0.50

720

370.50

371.00

0.50

320

380.00

380.50

0.50

310

380.50

381.00

0.50

330

382.50

383.00

0.50

1200

383.00

383.50

0.50

390

388.50

389.00

0.50

1100

389.00

389.50

0.50

570

389.50

390.00

0.50

1400

390.00

390.50

0.50

600

390.50

391.00

0.50

410

391.50

392.00

0.50

810

392.00

392.50

0.50

2500

392.50

393.00

0.50

2100

393.00

393.50

0.50

2600

393.50

394.00

0.50

1300

394.00

394.50

0.50

760

395.00

395.50

0.50

460

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

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 parlance; this colloquial

usage stems from historical naming conventions and the shared functionality of detecting gamma

radiation 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, F4'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.

About F3 Uranium Corp.:

F3 Uranium is a uranium exploration company, focusing on the recently discovered high-grade JR Zone

on its Patterson Lake North (PLN) Project in the Western Athabasca Basin. F3 Uranium 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 and Nexgen's Arrow.

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/256570