Mr. Jon Bey reports

STANDARD URANIUM INITIATES FIRST-EVER EXOSPHERE MULTIPHYSICS SURVEYS IN THE SW ATHABASCA BASIN, DAVIDSON RIVER PROJECT, SASKATCHEWAN

Standard Uranium Ltd. has commenced the first ExoSphere multiphysics survey in the southwestern Athabasca basin region at its flagship Davidson River project. Davidson River covers 30,737 hectares of prime exploration real estate in the SW Athabasca uranium district, highly prospective for basement-hosted uranium deposits along trend from high-grade uranium deposits under development. The surveys will be completed in partnership with Fleet Space Technologies Canada Corp. across three exploration corridors in May and June, 2025.

Highlights:

• First multiphysics in SW Athabasca: Standard Uranium and Fleet Space will complete the first three ExoSphere multiphysics surveys in the prolific SW Athabasca uranium district on Davidson River.
• Poised for discovery: High-priority target areas across three conductor corridors will be significantly derisked with high-resolution 3-D imaging of basement structures and alteration zones, providing key targeting information for a follow-up drill program.
• Integrative exploration strategy: Combined real-time 3-D ambient noise tomography, horizontal-to-vertical spectral ratio and ground gravity surveys will provide new data layers to characterize lithological variations and identify potential alteration signatures related to uranium mineralization, in addition to further refining the structural architecture of known basement conductors.
• Target development and drilling: The results of the multiphysics surveys will be subject to geophysical interpretation and modelling and integrated with the project's existing drilling and geophysical data sets to prioritize target areas for summer 2025 drilling.

"We are extremely excited to get back on the ground at our crown jewel project, Davidson River," said Sean Hillacre, president and vice-president, exploration, of Standard Uranium. "Integrating the 3-D density and velocity models to image alteration systems in the basement rock could provide the key data we've been looking for to vector into a new discovery at Davidson. We have been hard at work developing targets across the project since 2022, and,. armed with the new data sets from the multiphysics system, we aim to expedite discovery of a new basement-hosted uranium system with drilling this year."

Davidson River multiphysics surveys

In partnership with Fleet Space, the company will undertake three ExoSphere multiphysics survey grids across the Warrior, Bronco and Thunderbird conductors on the project. The company and Axiom Exploration Group Ltd. will mobilize to deploy the survey grids in late May, and the survey is anticipated to take approximately 35 days to complete.

The multiphysics surveys will collect and integrate ANT, HVSR and ground gravity data sets covering highly prospective areas along three of the four main structural corridors on the project. The surveys will provide critical targeting layers in the form of 3-D ANT-HVSR shear velocity models and custom inversion models for subsurface density, leveraging both passive seismic and ground gravity data sets as inputs.

Using Fleet Space's proprietary cover depth analysis from the ANT data in combination with the ground gravity data, Fleet Space will compute and provide a cover-corrected gravity data set, which will significantly upgrade target areas at Davidson River through imaging of density anomalies in the basement rock. These surveys will be the first of their kind in the SW Athabasca basin uranium district and marks a significant step toward discovery on the project.

Density anomalies in the basement rock coinciding with known graphitic conductors are often indicative of potential zones of hydrothermal alteration of host rocks associated with uranium mineralization events. Drill targeting with this strategy has been proved through the discovery of world-class uranium deposits in the SW Athabasca basin and will upgrade targets across the project.

Following postsurvey data analysis and integration, the company plans to execute a diamond drill program to begin testing the highest-priority targets across all three surveyed conductor corridors. Drilling is planned to be completed this summer, marking the first drill program on the project since 2022. Positive results from previous drill campaigns will be integrated into drill targeting with the newly acquired multiphysics data.

About Davidson River

Davidson River is Standard Uranium's flagship property, located in the southwestern Athabasca uranium district of the Athabasca basin, Saskatchewan, and encapsulates the inferred extension of the structural trend that hosts the Triple R and Arrow uranium deposits. The project consists of 10 contiguous mineral dispositions totalling 30,737 hectares, and lies approximately 25 to 30 kilometres west of Arrow and Triple R and 75 km south of the past-producing Cluff Lake uranium mines. The company has completed 16,561 metres of diamond drilling in 39 drill holes on the Davidson River property since 2020, which has further refined the exploration strategy for high-grade basement-hosted uranium mineralization on the property.

Davidson River hosts four main conductive corridors: the Warrior, Bronco, Thunderbird and Saint trends. These conductive trends are associated with graphitic-sulphidic structures in basement rocks, which are commonly associated with high-grade uranium systems, providing the conduits for mineralizing fluids. This concept has been proved for all four corridors, with several instances of graphitic-sulphidic fault rocks and reactivated structures intersected along the tested strike length.

Favourable basement rock types and alteration phases have been observed across the strike length of the main trends, resembling those which host other uranium deposits in the southwestern Athabasca basin region. Key indicators include clay-dravite alteration and stacked lenses of variably strained graphite and sulphide-bearing garnetiferous gneisses and altered feldspar-rich rocks. Structural zones in the basement are locally associated with elevated uranium and/or boron values (over 1,000 parts per million B), such as in DR-20-009 and 0113.

The results from diamond drilling programs to date highlight the potential for the Davidson River project to host significant basement-hosted unconformity-related uranium mineralization, and the property contains several priority targets along all four trends that warrant further exploration.

Davidson River project agreement

The company also announces that it has reached an agreement with the underlying owners of the Davidson River project to amend the timeline for completion of the remaining payments owing for the company to complete the acquisition of a 90-per-cent interest in the project. To exercise the existing option to acquire the interest in the project, the company is now required to complete the following payments to the optionors:

• $100,000 on or before July 15, 2025;
• $150,000 on or before July 15, 2026;
• $150,000 on or before July 15, 2027; and
• $150,000 on or before July 15, 2028, provided that the company will be required to accelerate certain payments in the event it completes certain levels of equity financing.

In consideration for the amendment, the company has agreed to issue one million common share purchase warrants to the optionors. Each warrant will entitle the holder to acquire a common share of the company at a price of 15 cents per share until July 19, 2029. In the event the closing price of the common shares of the company on the TSX Venture Exchange is 75 cents or greater for 10 consecutive trading dates, the company will have the right to accelerate the expiry of the warrants.

The company is at arm's length from the optionors. Completion of the issuance of the warrants remains subject to the approval of the TSX Venture Exchange. Upon issuance, the warrants will be subject to restrictions on resale for a period of four months and one day in accordance with applicable securities laws.

Qualified person statement

The scientific and technical information contained in this news release has been reviewed, verified and approved by Sean Hillacre, PGeo, president and vice-president, exploration, of the company, a qualified person as defined in National Instrument 43-101.

Historical data disclosed in this news release relating to sampling results from previous operators are historical in nature. Neither the company nor a qualified person has yet verified this data, and, therefore, investors should not place undue reliance on such data. The company's future exploration work may include verification of the data. The company considers historical results to be relevant as an exploration guide and to assess the mineralization, as well as economic potential of exploration projects. Any historical grab samples disclosed are selected samples and may not represent true underlying mineralization.

About Standard Uranium Ltd.

Standard Uranium is a uranium exploration company and emerging project generator poised for discovery in the world's richest uranium district. The company holds interest in over 233,455 acres (94,476 hectares) in the world-class Athabasca basin in Saskatchewan, Canada. Since its establishment, Standard Uranium has focused on the identification, acquisition and exploration of Athabasca-style uranium targets with a view to discovery and future development.

Standard Uranium's Davidson River project, in the southwestern part of the Athabasca basin, Saskatchewan, comprises 10 mineral claims over 30,737 hectares. Davidson River is highly prospective for basement-hosted uranium deposits due to its location along trend from recent high-grade uranium discoveries. However, owing to the large project size with multiple targets, it remains broadly undertested by drilling. Recent intersections of wide, structurally deformed and strongly altered shear zones provide significant confidence in the exploration model and future success is expected.

Standard Uranium's eastern Athabasca projects comprise over 42,384 hectares of prospective landholdings. The eastern basin projects are highly prospective for unconformity-related and/or basement-hosted uranium deposits based on historical uranium occurrences, recently identified geophysical anomalies and location along trend from several high-grade uranium discoveries.

Standard Uranium's Sun Dog project, in the northwestern part of the Athabasca basin, Saskatchewan, is composed of nine mineral claims over 19,603 hectares. The Sun Dog project is highly prospective for basement- and unconformity-hosted uranium deposits yet remains largely untested by sufficient drilling despite its location proximal to uranium discoveries in the area.

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