F3 – Extends Mineralization with 67.0m of Radioactivity at Tetra Zone

Largest Radioactive Intervals to Date on Project

Kelowna, British Columbia–(Newsfile Corp. – August 5, 2025) – F3 Uranium Corp (TSXV: FUU) (OTCQB: FUUFF) (“F3” or “the Company“) is pleased to announce hand-held scintillometer results at Tetra Zone, where the widest intervals of radioactivity to date on the Patterson Lake North Project have been intersected with PLN25-217, which intersected a total of 67.0m composite radioactivity between 299.5m and 414.5m, including 49.0m of continuous radioactivity between 347.5m and 396.5m. Additionally, PLN25-212, approximately 23m up-dip of PLN25-217 and 31m along strike from the discovery hole PLN25-205, intersected the second widest interval to date with 39.5m composite radioactivity between 330.0m and 409.5m, including 27.5m of continuous radioactivity between 360.5m and 396.5m.

2025 Handheld Spectrometer Highlights:

Tetra Zone

PLN25-217 (line 11280S):

  • 0.5m interval with radioactivity between 299.5m and 300.0m, and
  • 0.5m interval with radioactivity between 315.5m and 316.0m, and
  • 7.5m interval with radioactivity between 336.5m and 344.0m, and
  • 49.0m interval with radioactivity between 347.5m and 396.5m, and
  • 9.0m interval with radioactivity between 399.5m and 408.5m, and
  • 0.5m interval with radioactivity between 414.0m and 414.5m.

PLN25-212 (line 11310S):

  • 2.5m interval with radioactivity between 330.0m and 332.5m, and
  • 0.5m interval with radioactivity between 346.5m and 347.0m, and
  • 0.5m interval with radioactivity between 354.0m and 354.5m, and
  • 27.5m interval with radioactivity between 360.5m and 388.0m, and
  • 6.0m interval with radioactivity between 394.0m and 400.0m, and
  • 2.5m interval with radioactivity between 407.0m and 409.5m.

Sam Hartmann, Vice President Exploration, commented:

“The substantial radioactive widths intersected in these drill holes were truly unexpected and highlight the significant potential we see at the Tetra Zone. Despite challenging drilling conditions and the non-traditional style of mineralization, each hole provides valuable insights into deposit model generation and drill plan adaptations. Notably, PLN25-217 confirms a theorized strike direction deviating from the current conductor model, and we will continue to explore this trend. To improve our conductor modeling around the Tetra Zone area, we are planning a ground geophysical program based on a tighter grid to support larger step-outs along the Tetra Zone, which stands to reduce the number of drill holes required for targeting. Additionally, we cored two drill holes at the JR Zone using casings set last winter with PLN25-215 and -216, which tested for crosscutting structures; those assays will be included in our maiden resource estimate, expected in Q4. We are very excited and look forward to further uncovering this unique system hosting the Tetra Zone.”

Map 1. Broach Lake – Tetra Zone Scintillometer Results

Map 2. Patterson Lake North – JR Zone Scintillometer Results

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
PLN25-21111340S589409639796258446-75160.50161.000.50320160.9548
PLN25-21211310S589368639797058440-72330.00330.500.50360164.2458
       330.50331.000.50440  
       331.00332.001.00<300  
       332.00332.500.50310  
       346.50347.000.50330  
       354.00354.500.50380  
       360.50361.000.50410  
       361.00362.001.00<300  
       362.00362.500.50310  
       362.50363.000.50510  
       363.00363.500.50470  
       363.50364.000.50510  
       364.00364.500.50820  
       364.50365.000.50420  
       365.00365.500.50310  
       365.50366.000.50410  
       366.00366.500.50510  
       366.50367.000.50910  
       367.00367.500.501100  
       367.50368.000.501500  
       368.00368.500.50900  
       368.50369.000.50990  
       369.00369.500.502500  
       369.50370.000.503100  
       370.00370.500.501400  
       370.50371.000.50560  
       371.00371.500.501000  
       371.50372.000.50480  
       372.00372.500.50470  
       372.50373.000.50420  
       373.00373.500.501100  
       373.50374.000.50680  
       374.00374.500.503100  
       374.50375.000.501700  
       375.00375.500.50930  
       375.50376.000.50370  
       376.00376.500.50330  
       376.50377.000.50320  
       377.00377.500.50390  
       377.50378.000.50460  
       378.00378.500.502000  
       378.50379.000.503000  
       379.00379.500.503300  
       379.50380.000.502500  
       380.00380.500.50700  
       380.50381.000.50960  
       381.00381.500.503100  
       381.50382.000.50390  
       382.00382.500.50700  
       382.50384.001.50<300  
       384.00384.500.50310  
       384.50385.000.50670  
       385.00385.500.50320  
       385.50386.000.50670  
       386.00387.501.50<300  
       387.50388.000.50560  
       394.00394.500.50400  
       394.50395.000.50430  
       395.00395.500.50660  
       395.50396.000.50680  
       396.00396.500.50340  
       396.50397.000.50<300  
       397.00397.500.50380  
       397.50398.000.50340  
       398.00398.500.502000  
       398.50399.000.503000  
       399.00399.500.501000  
       399.50400.000.50520  
       407.00407.500.50360  
       407.50408.000.50320  
       408.00408.500.50<300  
       408.50409.000.50360  
       409.00409.500.50350  
PLN25-21311325S589359639795958445-73Pilot hole for wedged hole below154.3224
PLN25-213W111325S589359639795958445-73278.00278.500.50750154.3434
       278.50279.000.50430  
       279.00279.500.50550  
       326.00326.500.50530  
       326.50328.502.00<300  
       328.50329.000.50300  
       346.00346.500.50380  
       389.50390.000.50530  
       392.50393.000.50300  
PLN25-21411340S589404639797858446-75342.00342.500.50860155.7507
       342.50343.000.50430  
       382.50383.000.50360  
PLN25-215090S5878496410603546348-59249.00249.500.50370194.4281
       249.50250.000.50710  
       250.00250.500.50330  
       252.50253.000.50350  
       257.50258.000.50320  
PLN25-216075S587778641071254655-64169.50170.000.50310194.3239
       211.50212.000.502900  
       213.00213.500.50370  
PLN25-21711280S589393639802658534-85299.50300.000.50300160.1575
       315.50316.000.50460  
       336.50337.000.50310  
       337.00338.001.00<300  
       338.00338.500.50480  
       338.50340.001.50<300  
       340.00340.500.50450  
       340.50341.000.50650  
       341.00341.500.50320  
       341.50343.001.50<300  
       343.00343.500.50330  
       343.50344.000.50330  
       347.50348.000.50570  
       348.00348.500.50580  
       348.50349.000.50<300  
       349.00349.500.50340  
       349.50350.000.50<300  
       350.00350.500.50340  
       350.50351.000.50470  
       351.00351.500.50320  
       351.50352.000.50<300  
       352.00352.500.50700  
       352.50354.502.00<300  
       354.50355.000.50400  
       355.00355.500.505100  
       355.50356.000.50730  
       356.00356.500.50910  
       356.50357.000.50<300  
       357.00357.500.501000  
       357.50358.000.50910  
       358.00358.500.501100  
       358.50359.000.50490  
       359.00359.500.50360  
       359.50360.000.50630  
       360.00360.500.50680  
       360.50361.000.50350  
       361.00361.500.50540  
       361.50362.000.501200  
       362.00362.500.50430  
       362.50363.000.50680  
       363.00363.500.50540  
       363.50364.000.50330  
       364.00364.500.50810  
       364.50365.000.50610  
       365.00365.500.501000  
       365.50366.000.501100  
       366.00367.001.00<300  
       367.00367.500.50510  
       367.50368.000.50420  
       368.00368.500.50<300  
       368.50369.000.50340  
       369.00369.500.50820  
       369.50370.000.501900  
       370.00370.500.503300  
       370.50371.000.502200  
       371.00371.500.503500  
       371.50372.000.508500  
       372.00372.500.504500  
       372.50373.000.501100  
       373.00373.500.50630  
       373.50374.000.501200  
       374.00374.500.501300  
       374.50375.000.501300  
       375.00375.500.50800  
       375.50376.000.50310  
       376.00376.500.50300  
       376.50377.000.50620  
       377.00377.500.50760  
       377.50378.000.501700  
       378.00378.500.502100  
       378.50379.000.502600  
       379.00379.500.502700  
       379.50380.000.501400  
       380.00380.500.50720  
       380.50381.501.00<300  
       381.50382.000.502600  
       382.00382.500.50520  
       382.50383.000.501500  
       383.00383.500.50360  
       383.50384.000.50680  
       384.00384.500.50450  
       384.50385.000.50<300  
       385.00385.500.50300  
       385.50386.000.50520  
       386.00387.001.00<300  
       387.00387.500.50350  
       387.50388.000.50370  
       388.00388.500.50440  
       388.50389.000.50480  
       389.00389.500.502100  
       389.50390.000.506400  
       390.00390.500.504400  
       390.50391.000.504500  
       391.00391.500.502400  
       391.50392.000.503200  
       392.00392.500.50750  
       392.50393.000.50<300  
       393.00393.500.50420  
       393.50394.000.50400  
       394.00394.500.50550  
       394.50395.000.50350  
       395.00395.500.50680  
       395.50396.000.50700  
       396.00396.500.50360  
       399.50400.000.50360  
       400.00400.500.503600  
       400.50401.000.505800  
       401.00401.500.502000  
       401.50402.000.50500  
       402.00402.500.50<300  
       402.50403.000.50420  
       403.00403.500.50530  
       403.50404.000.50320  
       404.00405.001.00<300  
       405.00405.500.50300  
       405.50406.000.50<300  
       406.00406.500.50370  
       406.50407.000.50400  
       407.00407.500.50310  
       407.50408.000.50<300  
       408.00408.500.50300  
       414.00414.500.50420  

 

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 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.

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.

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: ir@f3uranium.com

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

F3 – Extends Mineralization with 67.0m of Radioactivity at Tetra Zone

F3 – Increases Mineralized Strike Length of Tetra Zone System to 1.2km

F3 – Hits 13.7% U3O8 Over 2.5m Within 5.5% Over 7.5m at JR

CHAIRMAN, CEO, DIRECTOR​

Dev Randhawa, MBA

 

Dev Randhawa is a seasoned CEO with extensive experience in resources, mining exploration, and energy companies. As the former CEO of Fission Uranium Corp., Mr. Randhawa, along with his technical team, led the high-grade uranium discovery at PLS in 2012. Recently, Paladin Energy made an offer of $1.1 billion to buy Fission Uranium.

In 1996, Dev founded Strathmore Minerals Corp., leading it until 2008. Mr. Randhawa spun off Fission Energy Corp. in 2007, focusing on uranium exploration in Saskatchewan. He sold major assets to Denison Mines in 2013 for $85 million, creating Fission Uranium Corp.

Dev has executed significant joint ventures, including a $50 million partnership with Sumitomo (Japan) and $44mil with KEPCO (Korea). In 2016, Dev negotiated an $82 million investment in Fission from CGN Mining. He holds a BBA from Trinity Western College and an MBA from the University of British Columbia.