Colombia Update

• Acquisition of Minera Monte Aguila S.A.S. successfully completed.
• Company has reassumed 100% ownership and operatorship of its flagship Anzá Gold Project in Colombia with no upfront payments
• Drilling at Pepas is progressing well with first hole completed

London, November 28, 2024. Orosur Mining Inc. ("Orosur" or the "Company") (TSXV/AIM:OMI) is pleased to announce that it has completed the acquisition ("Acquisition") of Minera Monte Aguila S.A.S.("MMA") as a result of which the Company now has 100% indirect ownership of the Company's flagship Anzá Gold Project ("Anzá Project" or the "Project") in Colombia.

About the Anzá Project

Anzá is a gold exploration project, comprising granted exploration licences and applications for exploration licences in the prolific Mid-Cauca belt of Colombia. Since September 2018, the Anzá Project was the subject of an Exploration Agreement with Venture Option with MMA. Since September 2020, MMA has been a 50/50 joint venture between Newmont Corporation ("Newmont") and Agnico Eagle Mines Limited ("Agnico").

The Project is located 50km west of Medellin and is easily accessible by all-weather roads and boasts excellent infrastructure including water, power, communications as well as a large exploration camp. Since the Company first acquired the Anzá Project in December 2014, almost 48,000m of drilling has been undertaken, mostly on the central APTA prospect where a high-grade body of gold mineralisation had been discovered. The most recent drilling activities were at Pepas in the north of the Anzá Project area where three holes returned excellent results, the best being 150.9m @ 3g/t Au from surface (hole PEP001, announced on September 6, 2022).

Terms of the Acquisition

Under a share purchase agreement (the "SPA"), between Orosur, Agnico, Newmont and certain of their respective subsidiaries, Orosur's wholly owned Canadian subsidiary, Waymar Resources Ltd. has acquired all of the issued shares of MMA resulting in Orosur holding 100% indirect ownership of the Project. The key terms of the Acquisition were announced on September 10th, 2024 and remain unchanged.

Drilling

As announced on November 21st, 2024, the Company has commenced drilling at Pepas ,with plans for a small program of six or seven holes for a total of roughly 800m. The first of these holes (PEP-012) has been completed with samples being submitted to an assay laboratory in Medellin on a gradual basis. First results are expected soon.

Orosur CEO Brad George commented:

"It is pleasing to finally be back in charge of our destiny. And with drilling already well underway, we are looking forward to a period of enhanced newsflow."

Orosur Mining Inc.

Louis Castro, Chairman

Brad George, CEO

SP Angel Corporate Finance LLP - Nomad & Broker

Jeff Keating / Caroline Rowe

Turner Pope Investments (TPI) Ltd - Joint Broker

Andy Thacker/James Pope

Flagstaff Communications

Tim Thompson

Mark Edwards

Fergus Mellon