Mr. Dev Randhawa reports

F3 HITS 2.50% OVER 1.0M - CONFIRMS HIGH GRADE URANIUM DISCOVERY AT TETRA ZONE

F3 Uranium Corp. has released the assay results of Tetra zone discovery hole PLN25-205, which returned a 1.0-metre high-grade interval with 2.50 per cent U3O8 (triuranium octoxide) within a 22.5-metre mineralized main interval averaging 0.26 per cent U3O8 from 384.5 metres to 407.0 metres. A secondary mineralized zone above the main zone averaged 0.125 per cent U3O8 over 3.5 metres from 377.5 metres to 381.0 metres.

Strong radioactivity in discovery hole PLN25-205 was first announced on April 15, 2025, on the Broach Lake property, part of F3's PLN project. Drilling on the Tetra zone is continuing with one diamond drill and one sonic drill.

Tetra zone discovery assay highlights:

• PLN25-205 (Line 11310S):
  • 0.5 m at 0.056 per cent U3O8 (373.0 m to 373.5 m);
  • 3.5 m at 0.125 per cent U3O8 (377.5 m to 381.0 m);
  • 22.5 m at 0.26 per cent U3O8 (384.5 m to 407.0 m):
    • Including 0.5 m at 1.25 per cent U3O8 (389.5 m to 390.0 m);
    • And 1.0 m at 2.50 per cent U3O8 (398.0 m to 399.0 m).

Samples from the drill core are split into half sections on site. Where possible, samples are standardized at 0.5-metre downhole intervals. One-half of the split sample is sent to SRC Geoanalytical Laboratories (an SCC ISO/IEC 17025:2005-accredited facility) in Saskatoon, Sask., 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 per cent U3O8 as high grade and results greater than 20.0 weight per cent U3O8 as ultrahigh grade.

All depth measurements reported are downhole and true thicknesses are yet to be determined.

About the Patterson Lake North project

The company's 42,961-hectare, 100-per-cent-owned Patterson Lake North project (PLN) is located just within the southwestern 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 23 kilometres 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 13 kilometres 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, PGeo, president and chief operating officer of F3 Uranium, 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 project in the Western Athabasca basin. F3 Uranium currently has three properties in the Athabasca basin: Patterson Lake North, Minto and Broach. The western side of the Athabasca basin in Saskatchewan is home to some of the world's largest high-grade uranium deposits, including Paladin's Triple R and Nexgen's Arrow.

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