Orosur Mining Inc. - Full Year 2026 Results

September 28, 2026 2:00 AM EDT | Source: Orosur Mining Inc.

London, United Kingdom--(Newsfile Corp. - September 28, 2026) - Orosur Mining Inc. ("Orosur" or "the Company") (TSXV: OMI) (AIM: OMI) announces its audited results for the fiscal year ended May 31, 2026. All dollar figures are stated in thousands of US$ unless otherwise noted. The audited financial statements of the Company for the year ended May 31, 2026; the related management's discussion and analysis ("MD&A"); and Forms 52-109FV1 were filed on Friday 25^th September and are available for review on the SEDAR+ website at The financial statements and the MD&A are also available on the Company's website at .

A link to the PDF version of the financial statements is available here:

A link to the PDF version of the MD&A is available here:

Highlights

Highlights for the year ended May 31, 2026 include:

Operational

In Colombia, at the Anza Project, the Company completed its in-fill drilling program at Pepas and has declared a Maiden Resource Estimate of 219,000 ounces of gold. The Company is now drilling in the greater Pepas area with a view to refining its geological model in the area and identifying potential future deposits. After the period end, the Company announced that it had identified a second area of mineralization some 100 metres to the West of Pepas.

In APTA, located in the centre of the Company's licence area, drilling commenced post the year end to gain a better understanding of the geological controls ahead of a potential resource estimate later this year. The results from this recent post year-end drilling indicates more extensive mineralisation at APTA which has substantially enhanced the prospectivity of APTA with three areas of potential requiring follow up.

To the south of APTA, geological mapping and sampling has been completed at El Cedro and the Company announced that new mapping and sampling had commenced post the year end at a new second porphyry identified to the south of El Cedro. New airborne geophysics was flown to establish drill targets at both El Cedro and in the new second porphyry identified to the south of El Cedro. Drilling commenced in late August 2026. Partial results from first hole at El Cedro show gold mineralisation from surface with 61.35m@ 0.93g/t Au (from surface) including 42.15m @ 1.02 g/t from 19m. Drilling is continuing to a planned depth of 500m.

In Argentina, the Company's first drilling program for a total of circa 5,500 metres (24 diamond drill holes) had been completed by the end of March 2026 at El Pantano. Drill holes were spread across the eastern and western extremes of the main rift related epithermal system, with several sections being completed to facilitate an assessment of lateral and vertical variations in geochemistry and structures.

On July 22, 2026, after the year end, the Company announced that the drilling campaign had identified a major gold/silver epithermal system and that a NI-34-101 report on the El Pantano Project had been prepared and filed on SEDAR+.

The Company also announced on that day, that, with the recently completed drilling program, the Company had satisfied all commitments under the JV Agreement with its partner Deseado ahead of the required deadline and, as such, had exercised its option to obtain 100% ownership of the El Pantano Project. As set out in the JV Agreement, Deseado has been granted a residual 2% net smelter royalty on the El Pantano Project, of which 1% can be bought by the Company for $1 million.

Interpretation of all new and historical data will inform a next phase of field work which may be commissioned later in the year, potentially ahead of a second drill program at the project.

Financial and Corporate

On September 18, 2025, the Company announced an upsized brokered private placement (the "Placing") to raise gross proceeds of Cdn$20,000,000 which included the full exercise of the broker's option, through the issue of 58,823,530 common shares at a price of Cdn$0.34 per common share. No warrants were issued in connection with the Placing. The Placing closed successfully on October 2, 2025.

At the Company's AGM, held on December 17, 2025 all resolutions put to shareholders were duly passed.

On May 31, 2026, the Company had a cash balance of $9,954,000 (May 31, 2025 - $4,877,000). As at the date of this press release the Company had a cash balance of $7,350,000.

Post year end, on September 22, 2026, the Company announced a brokered private placement (the "Placement") to raise gross proceeds of up to Cdn$14,000,000 through the issue of up to 43,750,000 units at a price of Cdn$0.32 per unit. Each warrant can be exercised for one common share at an exercisable price of US$0.32 for a period of 2 years from the date of issuance save for the first 61 days post issuance. The Placement is expected to close on or about October 6, 2026.

The audited consolidated financial statements have been prepared on a going concern basis under the historical cost method except for items measured at fair value, and assets and liabilities related to discontinued operations, which are measured at the lower of cost or recoverable amount. This accounting treatment has been applied to the activities in Uruguay and Chile.

For further information, visit , follow on X @orosurm or please contact:

Orosur Mining Inc
Louis Castro, Chairman,
Brad George, CEO
...
Tel: +1 (778) 373-0100

SP Angel Corporate Finance LLP - Nomad & Broker
Jen Clarke / Caroline Rowe / Devik Mehta
Tel: +44 (0) 20 3 470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker
Andy Thacker / Guy McDougall
Tel: +44 (0)20 3657 0050

Flagstaff Communications
Tim Thompson
Alison Allfrey
Fergus Mellon
... Tel: +44 (0)207 129 1474

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 ('MAR') which has been incorporated into UK law by the European Union (Withdrawal) Act 2018. Upon the publication of this announcement via Regulatory Information Service ('RIS'), this inside information is now considered to be in the public domain.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

About Orosur Mining Inc.

Orosur Mining Inc. (TSXV: OMI) (AIM: OMI) is a minerals explorer and developer operating in Colombia and Argentina.

Qualified Persons Statement

The information in this news release was compiled, reviewed, verified and approved by Mr. Brad George, BSc Hons (Geology and Geophysics), MBA, Member of the Australian Institute of Geoscientists (MAIG), CEO of Orosur Mining Inc. and a qualified person as defined by National Instrument 43-101.

Orosur Mining Inc. staff follow standard operating and quality assurance procedures to ensure that sampling techniques and sample results meet international reporting standards. Drill core is split in half over widths that vary between 0.3m and 2m, depending upon the geological domain. One half is kept on site in the Minera Anzá core storage facility in the case of the Anza Project, or on site in temporary racks in the case of the El Pantano Project, with the other sent for assay. Industry standard QAQC protocols are put in place with approximately 10% of total submitted samples being blanks, repeats or Certified Reference Materials (CRMs).

Samples for holes PEP-001 to PEP-011 were sent to the Medellin preparation facility of ALS Colombia Ltd, and then to the ISO 9001 certified ALS Chemex laboratory in Lima, Peru. Samples from PEP-012 and MAP-106 onwards are sent to Medellin laboratory of Actlabs for preparation and fire assay, with some samples then sent to the Canadian Actlabs facility for multi element assay. 30 gram nominal weight samples are then subject to fire assay and AAS analysis for gold with gravimetric re-finish for overlimit assays of >5 g/t. ICP-MS Ultra-Trace level multi-element four-acid digest analyses may also undertaken for such elements as silver, copper, lead and zinc, etc. Gold intersections are reported using a lower cut-off of 0.3g/t Au over 3m. Intersections are quoted as downhole thicknesses. True thicknesses are unknown.

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Source: Orosur Mining Inc.

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