Standard Uranium completes surveys on Davidson River

Mr. Jon Bey reports STANDARD URANIUM GENERATES NEW HIGH-PRIORITY URANIUM TARGETS AT FLAGSHIP DAVIDSON RIVER PROJECT FOLLOWING EXOSPHERE MULTIPHYSICS SURVEYS Standard Uranium Ltd. has provided an update on its summer exploration programs at the Davidson River project in the southwestern Athabasca basin region, Northern Saskatchewan. The company has completed the first ExoSphere Multiphysics surveys in the southwestern Athabasca uranium district on Davidson River, outlining multiple highly prospective target areas across the Warrior, Bronco and Thunderbird conductor corridors. Highlights: Successful ExoSphere Multiphysics surveys: Combined 3-D ambient noise tomography and horizontal-to-vertical spectral ratio velocity models and constrained ground gravity block models have been generated on the Warrior, Bronco and Thunderbird trends, providing critical subsurface information for guiding continuing exploration across the project. Critical vectors for high-grade uranium: Distinct gravity-low anomalies representing potential hydrothermal alteration zones have been identified across all three surveyed structural corridors, overlapping known electromagnetic conductors, extrapolated basement faults from previous drilling and basement velocity lows, marking structural disruption and/or favourable lithological contrasts. Multiple new targets also coincide with defined EM SmartMatch targets provided by ALS GoldSpot based on machine learning anomaly matching to the Arrow and Triple R deposits. Fall 2025 drill program: The company has secured drilling permits and executed exploration agreements with its Clearwater River Dene Nation partners. With vendors in place, the company is planning a four- to six-week drill program scheduled to commence in early September, 2025. Sean Hillacre, president and vice-president, exploration, of Standard Uranium, commented: "We have a clear geoscientific recipe for discovery at Davidson River leveraging exploration techniques and success next door at the Arrow and Triple R uranium deposits. The new data sets from our Multiphysics surveys unlock invaluable targeting information at Davidson River with the addition of gravity and seismic data outlining potential areas of significant hydrothermal alteration, akin to the geophysical signatures of nearby high-grade deposits in the same geological domain. The technical team and I are very excited to get the drills into the ground to test these new targets after several years of integrative targeting efforts." 2025 drill program -- integrative targeting ANT plus HVSR plus gravity grids covering uranium-bearing structural corridors on the project were designed to characterize lithological variations and alteration signatures, in addition to further refining the structural architecture of known basement conductors on Davidson River. The surveys have been completed, providing detailed data on subsurface features and enhancing the understanding of the geological framework in the area. Along each of the Warrior, Bronco and Thunderbird conductive trends, multiple gravity-low anomalies have been identified from constrained density models. These anomalies overlap with known EM conductors, extrapolated oriented core shearing/faulting and abrupt ANT-HVSR velocity anomalies that may represent basement wedges or vertically offset faulting, typical structural traps for uranium mineralization. Additionally, where these potential structures intersect gravity-low anomalies, they may indicate structurally focused hydrothermal alteration, such as clay replacement, which is commonly associated with basement-hosted uranium mineralization. The intersection of these geophysical anomalies with modelled graphitic shear zones results in multiple highly prospective drill target areas. Fall 2025 diamond drill program The company has completed comprehensive analysis and integration of survey data and plans to execute a diamond drilling program to test high-priority targets generated from the Multiphysics survey results. This 2025 diamond drill program marks the project's first drilling campaign since 2022. Drill targets will be prioritized based on integration of positive results from previous drilling, new ANT plus HVSR plus gravity anomalies, as well as ALS machine learning SmartMatch targets. The company has received processed high-confidence data sets from all three survey grids through joint inversion and modelling, resulting in optimized drill targeting for the September, 2025, program. 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 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. The company considers uranium mineralization with concentrations greater than 1.0 weight per cent triuranium octoxide to be high grade. 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 VP, 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 these 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. Private placement update The company also confirms that is continuing to move forward with its previously announced non-brokered private placement to raise gross proceeds of up to $3.5-million and expects to complete an initial tranche of the offering shortly. The offering consists of units of the company at a price of eight cents per unit and flow-through units of the company at a price of 10 cents per FT unit. Each unit consists of one common share of the company and one-half of one common share purchase warrant. Each FT unit will consist of one common share of the company to be issued as a flow-through share within the meaning of the Income Tax Act (Canada) and one-half of one warrant. Each whole warrant entitles the holder to purchase one common share of the company at a price of 15 cents at any time on or before that date which is 24 months after the closing date of the offering. The units will be offered to accredited investors, as well as existing shareholders of the company resident in British Columbia under B.C. Instrument 45-534 (Exemption from Prospectus Requirement for Certain Trades to Existing Security Holders). Only those shareholders who are resident in British Columbia and hold shares of the company as of Aug. 19, 2025, are eligible to participate under the existing shareholder exemption. Any person who becomes a shareholder of the company after the record date is not permitted to participate under the existing shareholder exemption. Existing shareholders who are interested in participating in the offering should contact the company. Subscriptions pursuant to the existing shareholder exemption are being allocated to subscribers on a first-come, first-served basis wherein the subscribers who are first to submit a completed subscription agreement and payment of the corresponding subscription proceeds will be accepted up until the maximum amount of the offering is reached. There are conditions and restrictions when relying upon the existing shareholder exemption; namely, the subscriber must: (a) be a shareholder of the company on the record date (and still is a shareholder); (b) be purchasing the units as a principal -- that is, for the subscriber's own account and not for any other party; and (c) not purchase more than $15,000 value of securities from the company in any 12-month period, unless they have first received suitability advice from a registered investment dealer, and, in this case, subscribers will be asked to confirm the registered investment dealer's identity and employer. The company intends to use the proceeds of the offering for the exploration and development of its projects and for general corporate and working capital purposes. The actual allocation of the proceeds may vary though, depending on future operations or unforeseen events or opportunities. If the offering is not fully subscribed, the company may apply the proceeds of the offering in such priority and proportions as the board of directors of the company determines to be in the best interests of the company. 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 233,254 acres (94,394 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 42,303 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. We seek Safe Harbor.