F4 Uranium Corp. (TSXV: FFU) has commenced an airborne Mobile MagnetoTellurics (Mobile MT) survey at its Wales Lake project, located in the southwestern Athabasca Basin region of Saskatchewan. The program, which covers the western portion of the property, involves flying approximately 700 line-kilometres to map potential geological extensions of the Patterson Lake Corridor and the parallel Saloon Trend. The company is funding this work through a C$1.0 million brokered private placement that closed earlier this month. The stock rose 8.33% on the day of the announcement, closing at $0.13.

The current survey represents a material shift in strategy for the explorer. In 2025, F4 utilized VTEM surveying to evaluate the project, whereas the 2026 campaign employs Mobile MT technology to better define prospective conductive features. The management team, which includes professionals responsible for past uranium discoveries like Patterson Lake North and Broach Lake, intends to use this data to refine targets for potential ground geophysics and follow-up drilling.

"We're excited to kick off our 2026 summer program at Wales Lake. The story here comes down to two of the most prolific corridors in the western Athabasca — the Patterson Lake Corridor, which hosts NexGen's Arrow and Paladin's Triple R deposits, and the parallel Saloon Trend, home to Paladin's new Atlas discovery and NexGen's Patterson Corridor East. Both are interpreted to trend toward our ground, and we suspect they carry on through the Wales Lake Project. Our near-term objective is straightforward — to locate these corridors across our Todd and Wales properties. Last year's Mobile MT survey at Todd Lake picked up resistivity-low trends that line up with the interpreted strike of the Patterson Lake Corridor, and those same features appear to continue toward the western end of Wales Lake. The nearby Tetra Zone discovery, just four kilometres northeast of Todd Lake in the Clearwater Domain, already shows this setting can host high-grade uranium mineralization. This airborne survey is the first step: mapping the corridors geophysically from the air. Based on the results, we will tighten up those targets with ground geophysics, before moving to drill-testing the most prospective of them. With our recently closed financing in place, we're well positioned to move quickly through advancing Wales Lake and the rest of our western Athabasca portfolio this year."

— Erik Sehn, Vice President Exploration

As the company progresses through the summer season, the technical team plans to integrate the new aerial findings with existing geological models. The completion of this 700 line-kilometre survey is anticipated in the coming months, marking the primary catalyst for the company’s western Athabasca exploration portfolio. By leveraging the specific resistivity profiles identified in previous surveys, the company aims to determine if the mineralization trends associated with major regional deposits extend directly onto its own land package.

Read the full announcement: F4 Searches for Patterson Lake Corridor at Wales Lake