F4 has commenced a 3,850 line-kilometre high-resolution airborne radiometric survey across its 100%-owned Todd Lake and Wales Lake projects in Saskatchewan.

The survey is designed to identify radioactive boulders or boulder trains at the surface, a method historically used in the Athabasca Basin to vector toward uranium mineralization at its source. F4 holds a portfolio of 17 wholly owned properties in the basin, totalling approximately 157,000 hectares.

“Tracing radioactive boulders back to their source is one of the oldest tricks in Athabasca exploration, and is just as relevant today.”

— Erik Sehn, Vice President Exploration

Following the survey’s completion, the company plans to integrate the radiometric data with existing geomorphological datasets to define targets for ground follow-up, which will include prospecting with hand-held gamma-ray spectrometers to sample potential uranium-bearing boulders.

In separate corporate news, F4 has appointed Sonia Graham as Chief Financial Officer, effective August 1, 2026. She succeeds outgoing CFO Jeremy Polmear.

Read the full announcement: F4 Begins Search for Radioactive Boulders at Todd and Wales Lake