Standard Uranium Announces Filing of NI 43-101 Technical Report on the Corvo Uranium Project, Northern Saskatchewan

Vancouver, British Columbia--(Newsfile Corp. - October 27, 2025) - Standard Uranium Ltd. (TSXV: STND) (OTCQB: STTDF) (FSE: 9SU0) ("Standard Uranium" or the "Company") is pleased to announce it has filed a technical report (the "Report") entitled "Technical Report on the Corvo Property - Northeastern Saskatchewan, Canada" prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101") on the Corvo Project ("Corvo" or the "Project"). The Report was co-prepared by Axiom Exploration Group Ltd. and has an effective date of October 24, 2025. The Report is available on SEDAR+ at www.sedarplus.ca and is published on the Company's website at www.standarduranium.ca.

Qualified Persons

All scientific and technical information contained in the Report summarizing the work completed to date on the Project has been reviewed and approved by Troy Marfleet, P.Geo., of Axiom Exploration Group Ltd., co-author of the report and independent Qualified Person ("QP") under the definitions established by National Instrument 43-101. The Report was co-authored by Sean Hillacre, M.Sc., P.Geo., President and VP Exploration of the Company, QP under the definitions established by NI 43-101. The Report does not contain a Mineral Resource Estimate ("MRE") in accordance with NI 43-101.

The QPs have reviewed and verified that the technical information with respect to all the Company's exploration efforts to date contained in the Report are accurate and have approved the written disclosure of such information. The Report is intended to be read as a whole, and sections should not be read or relied upon out of context.

About the Corvo Project

Standard Uranium strategically acquired 12,265 hectares in the eastern Athabasca Basin region, targeting high-grade basement-hosted uranium on the 100%-owned Corvo project. The Corvo Project is situated 1.5 km outside the current margin of the Athabasca Basin, approximately 45 kilometres northeast of the Gemini Mineralized Zone ("GMZ"; Figure 1).

The Project is located along the eastern edge of the Athabasca Basin and is currently under option (the "Option") to Aventis Energy Inc. (CSE: AVE) (the "Optionee"), an arms-length company. Pursuant to the Option Agreement, the Optionee can acquire 75% of the Project by funding C$4.5 million in exploration expenditures (which is subject to an operator's fee to the Company), making cash payments totalling C$225,000, and issuing C$725,000 in common shares, over a 3-year period. Following the 3-year Option period, Standard will retain a 25% stake in the Project and form a non-incorporated Joint Venture with Aventis to advance exploration.