Orosur Mining Inc.
Orosur Mining Inc. is a Toronto-headquartered, Colombia-focused gold exploration and development company whose flagship Anza project sits in the Middle Cauca Belt. In-fill drilling at the Pepas prospect led to a maiden resource estimate of 219,000 oz gold, with recent drill results at Pepas and El Pantano returning mineralized intersections in the 1.41-5.77 g/t Au range. In November 2024 Orosur completed a delayed-consideration purchase of the remaining MMA shares, restoring 100% ownership of Anza. The company also holds exploration interests in Argentina. Third-quarter (fiscal Q3, ended 28 Feb 2026) results showed a net loss of ~US$4.5 million and a cash balance of US$13.65 million at quarter end, with cash of US$11.57 million as at the 29 Apr 2026 MD&A date; the company also raised C$5 million via private placement to accelerate exploration at Anza. Louis Castro is Executive Chairman and Brad George is Chief Executive Officer.
Notable vs. Peers
- Jurisdiction risk score of 5/10 is meaningfully riskier than the peer average of 7.8/10.
- Trading within 4% of its 52-week low — weak recent price momentum.
Lifecycle Milestones
Not yet determined: mill, tailings facility.
Jurisdiction (40%)5/10
Middle Cauca Belt, Colombia -- an active and prospective gold belt with a growing junior-mining track record, but security, community-relations and permitting-timeline overhead keep it below top-tier (Canada/Australia) jurisdictions.
Infrastructure (40%)7.9/10
Confirmed road access and confirmed grid power at Anza Project (Pepas & El Pantano deposits), Middle Cauca Belt, Colombia; existing mill and tailings facility not yet researched, counted at a neutral 5/10 until established.
Nearby producing mine (20%)Not yet researched
No producing mine within 50 km in our reference list (nearest listed: Buritica (Zijin Mining Group), 50 km). That list doesn't cover every mining district yet, so a longer distance isn't scored as remote.
Acquisition Susceptibility
A relative ranking of how closely this company matches the profile of juniors that have actually been acquired — not a probability, and not a reason to buy. Acquisitions are rare: only a few dozen significant deals happen a year across a universe of thousands of juniors, so even a high score here describes a long shot. The strongest signal in the research, a producer that already owns part of the company, is scored from its disclosed strategic shareholders. A producer that is a joint-venture or earn-in partner on the project, rather than a shareholder, isn't captured yet.
How this score is built
- Disclosed pending dealSub-score: Not scored
No pending acquisition or merger disclosed (checked)
Not scored: having no deal in flight isn't held against a company.
Weight 26.25% - Producer's strategic stakeSub-score: Not scored
No producer holds a disclosed stake on file (holder register researched) See holders
Not scored: most juniors that do get bought had no prior toehold, so a missing stake says little either way.
Weight 25% - Distance to a producing mineSub-score:5/10
Nearest producing mine: Buritica (Zijin Mining Group), 50 km
10 next to a producing mine, 8 at 20 km, 5 at 50 km, 0 beyond 200 km.
Weight 22.5% · 46% here - Lifecycle stageSub-score:3.5/10
Stage: Resource Definition
Feasibility and permitting score 10, where deals cluster, and production 5.5; earlier stages score less, down to 1 at grassroots.
Weight 15% · 31% here - JurisdictionSub-score:5/10
Colombia: jurisdiction score 5/10
Our jurisdiction score, used as is: higher means lower political and permitting risk.
Weight 6.75% · 14% here - CommoditySub-score:10/10
Primary commodity: Gold
Gold 10, copper 8, silver 5, nickel and uranium 4, others 2: most majors' deals are for gold.
Weight 4.5% · 9% here
Weight is each input's share of the full score. “Here” is its share of this company's score: inputs that aren't scored are left out and the rest re-weighted, never counted as zero.
Your Rankings
Management Team
Executive Chairman of Orosur Mining Inc.
Chief Executive Officer of Orosur Mining Inc.
Insiders, Investors & Smart Money
Notable shareholders and insiders whose involvement is worth knowing about, plus what we're seeing from institutional/large-investor activity.
Orosur Mining's shareholder register (as of July 24, 2026) is dominated by UK retail-broker nominee accounts (Hargreaves Lansdown 23.56%, Interactive Investor 17.88%) plus 1832 Asset Management at 9.98% and Sprott Asset Management at 3.04% -- a real but small specialist stake. No producer or major mining company holds shares.
No notable insiders tracked for this miner yet.
Reports, Presentations & Documents
Orosur Mining is a Colombia-focused gold explorer whose flagship is the Anza project in the Middle Cauca belt of Antioquia, which it again owns 100% after completing the purchase of the remaining MMA shares in November 2024; it also holds exploration interests in Argentina. The maiden resource at the Pepas deposit, effective 16 January 2026, has 201,000 oz of gold indicated (1.14 Mt at 5.46 g/t), with no measured category, plus 18,000 oz inferred, while El Pantano has no resource yet. Extension drilling at Pepas West in August 2026 returned near-surface intercepts of 10.2 m at 5.77 g/t gold and 19.8 m at 1.77 g/t gold.