Slide 1: Investor Presentation: Transitioning to Development
Investor Presentation Transitioning to Development LON:OMI TSX.V:OMI Presentation, September 2026
Slide 2: Forward Looking Statements and Disclosures
Forward Looking Statements and Disclosures This document and any information contained herein (together, the "Presentation") is strictly private and confidential and is being provided to you solely in connection with a potential fundraising by Orosur Mining Inc. (the "Company"). By receiving this Pr
Slide 3: Forward Looking Statements and Disclosures
Forward Looking Statements and Disclosures This Presentation does not constitute a prospectus, offering memorandum or similar document for the purposes of any applicable laws in any jurisdiction and has not been approved by or filed with any regulatory authority in any jurisdiction. The distribution
Slide 4: Corporate Snapshot
Corporate Snapshot 401m Shares 23.6m Options/RSU/DSU pence 14m Warrants US$6.5m Cash Board of Directors Key Management US$115m Market Cap Louis Castro: Executive Chairman Joaquin Sarroca: VP Commercial and Legal Brad George: CEO and Director Liliana Munoz: Colombia Manager Thomas Masney: Non-Executi
Slide 5: Key Projects
Key Projects Anzá - Colombia • 530km2 of licenses and applications in Mid-Cauca Belt • 100% owned. • Pepas maiden resource completed – NI43-101 report filed. • APTA prospect in resource drilling phase • Drilling just commenced on El Cedro porphyry system. El Pantano – Argentina • 550km2 in Deseado M
Slide 6: Mid-Cauca – Colombia’s elephant country
Mid-Cauca – Colombia’s elephant country • Mid-Cauca – Colombia’s primary copper/gold belt. • Close to road network, power, water • Trend includes giants: • Buritica - Zijin • Quebradona - Anglo Gold • Marmato – Aris • Guayabales - Collective • Porphyry and Epithermal systems • OMI huge permit holder
Slide 7: Anza Project, Colombia
Anza Project, Colombia Returned to 100% ownership in Dec 2024 Holding 530km2 - 170km2 licenses - 360km2 applications Immediate success at Pepas – MRE defined. Pepas moving into feasibility and permitting. APTA deposit being advanced. El Cedro drilling just commenced. Wider license areas 7 largely un
Slide 8: Pepas – High Grade Resource
Pepas – High Grade Resource Category Tonnes Gold Grade Contained (Mt) (g/t) Gold (ozs) Indicated 1.14 5.46 201,000 Inferred 0.19 2.99 18,000 MRE released in February 2026. High grade, shallow, low strip, close to highway, power to site – near term production potential Truncated by post-mineralisatio
Slide 9: Pepas regional
Pepas regional Miocene reactivation of Cretaceous structures. Change from dextral transpression to sinistral extension. Opened space for emplacement of porphyries. Multiple repetitions mapped along N-S corridor. Drilling planned 9
Slide 10: APTA – Next Resource?
APTA – Next Resource? 40,000m of drilling New geological model developed Currently being drilling Multiple targets Understand geology Potential to move to MRE in medium-term 10
Slide 11: El Cedro Porphyry System
El Cedro Porphyry System Large gold/copper porphyry system, little historical exploration. Two adjacent porphyry centres Recent soil sampling confirms gold anomalies at surface Rock chips up to 10 g/t Au and 2% Cu Drilling commenced – initial 3000m planned 11
Slide 12: El Cedro - extended system
El Cedro - extended system El Cedro system comprises intrusions and proximal structures and hydrothermal systems Extends over 3km N-S El Yarumo El Yarumo hydrothermal system 1.5km North of El Cedro. High grade veins, up to 10g/t Au and 2% Cu. Mapping and sampling underway El Cedro. N to expand and d
Slide 13: El Cedro - first results
El Cedro - first results 13
Slide 14: El Pantano - Argentina
El Pantano - Argentina Deseado Massif -prolific gold and silver province. Cerro Negro exploration model. Earned 100% with trailing NSR to vendors. One of the largest land packages in the region. First drilling campaign concluded Major mineral system identified. Plans for next phase being developed 1
Slide 15: Thank You
Thank You LON:OMI TSX.V:OMI Tel: +1 778-373-0100 | info@orosur.ca | www.orosur.ca