F4 Uranium Launches First Airborne Radiometric Survey to Trace Boulder Trains at Todd and Wales Lake

• F4 Uranium Corp. has commenced its first-ever high-resolution airborne radiometric survey across the Todd Lake and Wales Lake projects in the southwestern Athabasca Basin.
• The survey, flown by RAMP Geological Services using its RAMP-HD radiometric system, will cover approximately 3,850 line kilometres.
• The exploration method mirrors the approach that led to the discovery of the Patterson Lake South boulder train and, ultimately, the Triple R deposit.
• Both projects sit along the interpreted extension of the Patterson Lake Corridor, near NexGen Energy's Arrow deposit and Paladin Energy's Triple R and Saloon discoveries.
• Sonia Graham has been appointed Chief Financial Officer, bringing more than 20 years of senior finance and capital markets experience.

F4 Uranium Corp. (TSXV: FFU) (OTCQB: FFUCF) is a Canada-based uranium exploration company focused on the Athabasca Basin in northern Saskatchewan. The company is run by a management and exploration team involved in previous uranium discoveries in the region, including Patterson Lake North and Broach Lake. Its portfolio spans 17 wholly owned properties covering approximately 157,000 hectares, several positioned near established deposits such as Triple R, Arrow and Hurricane. The company's assets were spun out of F3 Uranium in 2024, and F4 operates across both the west and east sides of the Athabasca Basin as an explorer and project generator.

First-Ever High-Resolution Airborne Radiometric Survey Targets Uranium-Bearing Boulder Trains

F4 Uranium has begun the first high-resolution airborne radiometric survey ever flown over its 100% owned Todd Lake and Wales Lake projects. The survey is designed to detect radioactive boulders or boulder trains on or near the surface, which have been used in the Athabasca Basin as indicators pointing toward undiscovered uranium mineralization at depth. RAMP Geological Services is conducting the work using its helicopter borne RAMP-HD system, covering roughly 3,850 line kilometres across the two properties.

The 1975 discovery of the high-grade Key Lake mine followed uranium-rich boulders in glacial debris back to their source. The same method led to the 2012 discovery of the Patterson Lake South boulder field, which subsequently guided explorers to Paladin Energy's Triple R deposit, located approximately 13 kilometres east of the Todd Lake property.

Once the airborne data is collected, F4 plans to combine it with existing geological mapping to prioritise targets for ground follow-up. Crews will then use handheld gamma-ray spectrometers to investigate any anomalies the survey identifies, with the goal of confirming and sampling uranium-bearing boulders directly. 

Vice President Exploration Erik Sehn, P.Geo., said:

"Tracing radioactive boulders back to their source is one of the oldest tricks in Athabasca exploration, and is just as relevant today. Key Lake, a high-grade uranium mine on the southeastern rim of the Athabasca Basin, began with pitchblende boulders in glacial debris that were followed back up-ice to the ore body, and Patterson Lake South was found the same way four decades later."

Patterson Lake Corridor Setting Supports the Triple R Discovery Analogy

Todd Lake and Wales Lake sit immediately west of several established uranium discoveries in the Athabasca Basin, including NexGen Energy's Arrow deposit and Paladin Energy's Triple R deposit, along with more recent finds such as NexGen's PCE occurrence and Paladin's Saloon and Atlas zones. The Patterson Lake Corridor, the geological trend hosting both Arrow and Triple R, is interpreted to extend toward the Todd Lake property and potentially continue toward Wales Lake.

Both projects lie just outside the edge of the Athabasca Basin, where prospective basement rock sits beneath glacial overburden rather than under the sandstone cover found deeper within the basin. In this setting, mineralization at the top of bedrock could have been transported and dispersed by glacial ice, leaving boulders on or near the surface.

Todd Lake has no recorded drilling history, while Wales Lake has had two historic drillholes. Neither project has had an airborne radiometric survey conducted prior to the current programme.

Sonia Graham Appointed Chief Financial Officer

F4 Uranium has appointed Sonia Graham as Chief Financial Officer, effective August 1, 2026. Ms. Graham brings more than 20 years of senior finance leadership experience spanning financial reporting, corporate governance, capital markets and regulatory compliance, including work with the SEC, Nasdaq, and the Toronto and TSX Venture exchanges. She previously served as Principal Accounting Officer during Xenon Pharmaceuticals' (NASDAQ: XENE) initial public offering, where she led preparation of the company's SEC registration filings.

Ms. Graham succeeds Jeremy Polmear, who resigned as Chief Financial Officer effective the same date.

Chief Executive Officer Raymond Ashley, P.Geo., commented:

"We welcome Sonia, who's proven track record of scaling businesses makes for a powerful addition to our leadership team as we execute our growth strategy." He added that Mr. Polmear played a key role in the arrangement that formed F4 and in its listing on the TSX Venture Exchange.

As part of her appointment, Ms. Graham was granted 325,000 restricted share units under the company's fixed equity incentive plan, vesting in equal thirds over three years.

Milestones and Next Steps

The completion of the airborne radiometric survey is the next milestone for F4 Uranium, with results expected to inform a follow-up ground prospecting programme using handheld gamma-ray spectrometers to investigate any identified anomalies. Should uranium-bearing boulders be confirmed, the company intends to trace them back toward their source to help identify future drill targets on the Todd and Wales Lake properties. Alongside the exploration programme, the appointment of a new Chief Financial Officer marks a change in the company's leadership as it continues to advance its portfolio in the Athabasca Basin.

‍