Mr. Louis Castro reports

OROSUR MINING INC ANNOUNCES EL CEDRO SAMPLING OPENS NEW HORIZONS

Orosur Mining Inc. has provided an update on the progress of exploration activities at the company's exploration project at Anza in Colombia.

Anza -- Colombia

The Anza project in Colombia comprises a number of granted exploration titles and applications totalling roughly 330 square kilometres, within the Mid-Cauca gold belt, west of the city of Medellin.

These titles and applications are owned by two Colombian companies, Minera Anza and Minera Monte Aguila, both wholly owned subsidiaries of the company. The latter of these was acquired by Orosur in November, 2024, from the company's previous joint venture partners, Newmont Mining and Agnico Eagle Mines. Orosur thus owns 100 per cent of the Anza project.

Since acquiring 100-per-cent control, the company has focused its attention on three prospects:

• Pepas -- a shallow, high-grade body of gold mineralization for which the company has calculated a mineral resource estimate (MRE), announced on Feb. 10, 2026;
• APTA -- a high-grade body of gold mineralization that has to date seen over 38,000 metres of historical drilling and at which drilling is currently under way;
• El Cedro -- a cluster of gold porphyry intrusions in the south of the project area that are currently subject to mapping and sampling programs, with a view to potentially being drilled later in the first half of 2026.

El Cedro

The El Cedro prospect lies to the south of the same integrated licence that hosts both Pepas and APTA and is roughly four kilometres south of the APTA base camp.

Work on the area began some years before Orosur's tenure, when Anglo American undertook reconnaissance mapping and sampling, identifying a highly prospective gold/copper porphyry system. This work was largely focused on a small soil program in the centre of what was known of the northern porphyry, plus mapping in flanking creeks and drainages, which identified several veins systems with rock chips returning over 10 grams per tonne gold.

Little work was then undertaken until late 2021, when the company's previous JV partner, MMA, re-entered the area to carry out mapping, sampling and ground geophysics that largely confirmed Anglo American's previous work and mapped several large dioritic intrusions and associated epithermal systems.

Post resumption of control of the project, the company began a large-scale soil geochemical survey in May, 2025, planned to cover most of what was thought to be the extent of the porphyry system as it was known at the time. Soil samples were taken at roughly 25-metre intervals, along ridges and spurs for ease of access and to ensure soils were residual. Results from this work were announced on Oct. 30, 2025, which included the identification of a second intrusive body immediately south of the known northern body.

Identification of this second body led to the commencement of an additional soil and mapping program to the same specifications.

Assay results from this new program demonstrate this southern intrusive system to be largely similar to the northern body, demonstrating high-grade gold in soils, at times over one gram per tonne gold, over total area of roughly two kilometres by three kilometres.

Mapping suggests both intrusive systems to be geologically similar and therefore likely to be related events (albeit based on limited outcrop) but with slightly different geomorphological settings and soil profiles.

Both sit within the same north-south structural corridor with the highest-grade soil and rock-chip samples being in fault systems between the two intrusions and on the flanks of each, suggesting the presence of porphyry-associated epithermal systems.

A detailed drone-mounted magnetic survey has just been completed over the southern portions of the Anza project area, including El Cedro and APTA. It is anticipated that several weeks may be required to finalize processing of these data, which can then be used in conjunction with the recent sampling data at El Cedro and drilling currently under way at APTA to develop new drill targets in the region.

It is anticipated that drilling can commence at El Cedro in the near term once targeting and access permitting has been completed.

Pepas

As announced on April 14, 2026, a new zone of gold mineralization (Pepas West) has been discovered approximately 100 metres west of the Pepas deposit, which geologically, bears a close resemblance to Pepas.

Excluding two previous holes from early 2025, in this recent campaign, nine holes have now been drilled into this new zone (PEP082 to PEP090). Results from holes PEP082 and PEP083 have already been announced, with samples from the remaining holes either in the laboratory or being prepared for shipment.

In the meantime, the decision has been taken to temporarily move the Pepas rig to a new target several hundred metres to the south, which will also allow time for data from this recent drilling at Pepas West to be compiled and examined.

Mineralization identified in this new western zone closely resembles Pepas, suggesting the possibility that both are derived from the same original source, but then broken up by postmineralization faulting. The company believes it is important to understand the structural setting that has led to the emplacement of Pepas West and the implications of this for both extension and repetitions.

Orosur chief executive officer Brad George commented: "With the possibility of three rigs operating soon on three prospects, Anza is now inexorably growing in scope, scale and complexity. The picture is emerging of a substantial mineralized province, the surface of which is only now starting to be scratched."

About Orosur Mining Inc.

Orosur Mining is a minerals explorer and developer currently operating in Colombia and Argentina.

Qualified person statement

The information in this news release was compiled, reviewed, verified and approved by Brad George, BSc (honours) (geology and geophysics), MBA, member of the Australian Institute of Geoscientists (MAIG), chief executive officer of Orosur Mining and a qualified person as defined by National Instrument 43-101.

Orosur Mining staff follow standard operating and quality assurance procedures to ensure that sampling techniques and sample results meet international reporting standards.

We seek Safe Harbor.