Mr. Jason Barnard reports

FOREMOST CLEAN ENERGY ANNOUNCES POSITIVE RADON SURVEY RESULTS ON ITS WOLVERINE URANIUM PROPERTY, ATHABASCA BASIN, SASKATCHEWAN

Foremost Clean Energy Ltd. has released the results of its recently completed radon survey, at the Wolverine uranium property, located in the world-renowned Athabasca basin region of Northern Saskatchewan, approximately 15 kilometres southeast of the Cigar Lake mine site. The radon survey, previously announced on June 25, 2025, was conducted by RadonEx Ltd., consisting of both radon flux monitoring over land and a small radon-in-water component to test adjacent wetlands. A total of 893 data points were collected over the survey grid. The survey grid was designed to cover two potential faults, which may explain the notable unconformity offset (1) observed on the property.

Jason Barnard, president and chief executive officer, states: "These survey results provide strong evidence that the interpreted structures at Wolverine are associated with elevated radon anomalies, which may suggest the presence of subsurface uranium. This strengthens our confidence that the property has the right geological setting to host high-grade unconformity-style uranium mineralization. With these results in hand, our technical team will now integrate the radon data with historical geophysical and drill information to refine high-priority drill targets for future testing. We look forward to advancing Wolverine, which looks like another highly promising project to the 10-project portfolio we have optioned from Denison Mines. We are eager to advance our understanding of this site and systematically unlock any significant mineral potential."

Radon survey results and structural interpretation

Radon surveying is geochemical approach, which leverages the relationship between radon gas emissions and the presence of subsurface uranium. As uranium decays, it produces radon gas as one of its daughter products. Because radon is a gas, it can migrate toward the surface, particularly along faults and fractures, where it can be detected and measured.

Results from the radon flux monitoring identified elevated radon trends within the property, including a one-kilometre-long anomaly trending northeast and a second anomaly in the northeast portion of the grid, both of which remain open along strike.

To better visualize survey results, Foremost has ranked all radon flux values relative to the highest value collected during the program. The maximum value is ranked 10, with all other results scaled accordingly. This ranked data set highlights a pronounced north-northeast-trending radon anomaly that closely coincides with an interpreted structural feature on the property. While the radon trend closely parallels the structure, it is slightly offset, which is expected given that the structure is interpreted from magnetics reflecting basement rocks, whereas radon values are measured at surface. This correlation suggests that the structure may be fertile and represents a compelling target for future drill programs.

About the Wolverine property

Wolverine is part of Foremost's unique collaboration with Denison Mines Corp. and consists of three mineral claims totalling 12,444 acres (5,036 hectares). Historical work has been conducted on Wolverine by various companies, including geophysical surveys and drilling programs. Previous exploration identified uranium mineralization, including drill hole WL10-01, which intersected 2,087 parts per million (ppm) uranium (U) over 0.1 metre (2). Numerous airborne and ground-based geophysical surveys suggest a complex, structural architecture on the property. Drilling from 2011 to 2014 indicates up to 50 m of unconformity displacement. The controlling fault is non-conductive and its precise location is uncertain.

Next steps

Foremost intends to integrate the results with historical geochemical and geophysical data to refine high-priority drill targets, which could form the basis for future drill testing of the property.

Qualified person

The technical content of this news release has been reviewed and approved by Cameron MacKay, PGeo, vice-president of exploration for Foremost, and a qualified person under National Instrument 43-101, who has prepared and reviewed the content of this news release.

A qualified person has not performed sufficient work or data verification to validate the historical results in accordance with National Instrument 43-101. Although the historical results may not be reliable, the company nevertheless believes that they provide an indication of the property's potential and are relevant for any future exploration program.

About Foremost Clean Energy Ltd.

Foremost is a rapidly growing North American uranium and lithium exploration company. The company holds an option holds an option from Denison Mines Corp. to earn up to a 70-per-cent interest in 10 prospective uranium properties (with the exception of the Hatchet Lake, where Foremost is able to earn up to 51 per cent), spanning over 330,000 acres in the prolific, uranium-rich Athabasca basin region of Northern Saskatchewan. As the demand for carbon-free energy continues to accelerate, domestically mined uranium and lithium are poised for dynamic growth, playing an important role in the future of clean energy. Foremost's uranium projects are at different stages of exploration, from grassroots to those with significant historical exploration and drill-ready targets. The company's mission is to make significant discoveries alongside and in collaboration with Denison through systematic and disciplined exploration programs.

Foremost also has a portfolio of lithium projects at varying stages of development, which are located across 55,000-plus acres in Manitoba and Quebec.

(1) Unconformity offset interpreted from drill hole logs. See Saskatchewan mineral assessment files 74H053, 74H15-0068 and 74H10-0071.

(2) See Saskatchewan mineral assessment file 74H15-0068.

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