Orosur Mining Inc Reports Q2 Results for the Quarter Ended November 30, 2025

London, UK — January 26, 2026 — Orosur Mining Inc. (“Orosur” or “the Company”) (TSX-V:OMI) (AIM:OMI), a minerals explorer and developer with operations in Colombia and Argentina, today announced its unaudited financial results for the second quarter ended November 30, 2025. The interim financial statements and Management’s Discussion & Analysis (“MD&A”) have been filed on SEDAR+ and are available on the Company’s website.

Quarterly Highlights

For the three months ended November 30, 2025, Orosur continued advancing exploration and drilling programs across key projects while strengthening its financial position:

• Pepas Drilling Progress: In Colombia, infill drilling continued at the Pepas gold prospect in the Anzá project. Results from recent drilling helped further define the deposit and support planning for a National Instrument 43-101 compliant Mineral Resource Estimate, expected by the end of January 2026.
• Soil Geochemical Work at El Cedro: A large soil survey at El Cedro identified a significant gold-bearing system with anomalous geochemical responses.
• El Pantano JV in Argentina: Orosur earned a direct 51 % interest in Deseado Dorado S.A.S, the holder of licences for the El Pantano project in Santa Cruz province. A 3,000-metre drilling program was underway, confirming a low sulphidation epithermal mineral system.
• Withdrawal from Nigeria Lithium Project: Orosur decided to withdraw from its Nigerian lithium project to prioritise capital and human resources for core activities. The investment was fully impaired in the financial statements.

Financial and Corporate Developments

The Company reported a strong cash position at quarter end, reflecting successful financing and operational focus:

• Cash Balance: As at November 30, 2025, Orosur held a cash balance of US$16.28 million, up significantly from US$4.88 million as at May 31, 2025.
• Private Placement: On September 18, 2025, the Company completed an upsized brokered private placement, raising gross proceeds of CAD$20 million through the issuance of common shares.
• AGM Resolutions Passed: Following the period end, all resolutions at the Company’s Annual General Meeting on December 17, 2025 were duly passed.

Financial Statement Summary

The interim consolidated financial statements provide an overview of the Company’s financial position as at November 30, 2025. Key figures include assets, liabilities and equity compared with the prior period. These statements are available in the detailed MD&A and financial filings on the Company’s website.

Operational Outlook

Looking ahead, the Company remains focused on advancing exploration results into quantifiable resources and prioritising expenditure on high-potential targets:

• Pepas Mineral Resource Estimate: With infill drilling nearing completion, Orosur expects to deliver an NI 43-101 compliant Mineral Resource Estimate for Pepas by late January 2026.
• El Pantano Drilling Program: The ongoing drill program at the El Pantano project is aimed at expanding geological understanding and targeting future drill-ready zones.
• Corporate Priorities: With a strengthened balance sheet, the Company plans to deploy capital strategically on exploration and project development activities while monitoring market conditions.

About Orosur Mining Inc.

Orosur Mining Inc. is a mineral exploration and development company listed on the TSX Venture Exchange and the AIM market of the London Stock Exchange. The Company’s primary focus is gold-rich projects in Colombia and Argentina, with ongoing exploration work aimed at advancing early-stage discoveries toward resource estimation and potential future development.

Forward-Looking Statements

This press release includes forward-looking information, including statements regarding planned drilling, exploration results, future resource estimations, and corporate strategies. Actual results may differ materially due to risks and uncertainties inherent in mineral exploration and market conditions. Readers are cautioned not to place undue reliance on forward-looking statements.

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