Marimaca Copper is advancing the Marimaca Copper Project, a copper oxide deposit in northern Chile amenable to conventional heap-leach/SX-EW processing. An August 2025 Definitive Feasibility Study outlined a 50,000-tonne/year copper cathode operation with a 13-year mine life, and the company has since raised roughly US$300M toward a construction decision, positioning it as one of the more advanced pre-production copper juniors globally.
Notable vs. Peers
- Financials score of 10/10 is stronger than the peer average of 6.2/10.
Lifecycle Milestones
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 the underlying research identifies — whether a major already holds a JV, earn-in, or 5–19.9% strategic stake — isn't tracked yet and is absent from this score.
Your Rankings
Management Team
President and Chief Executive Officer of Marimaca Copper Corp. ~20 years in mining and finance: investment banking at J.P. Morgan, mining private equity at Barclays Natural Resource Investments, Head of Corporate for ASX-listed gold developer Papillon Resources Limited (through its real, completed Nov 2014 acquisition by B2Gold Corp. for ~US$600 million), and Head of Corporate/Technical Services at ASX-listed potash developer Highfield Resources. Has served as CEO of AIM-listed Emmerson Plc, a Moroccan potash developer, since 2018, remaining a director/executive chairman there (a real, disclosed concurrent role, not separately scored). Educated at the Western Australian School of Mines. Joined Marimaca as President in July 2020, became CEO and joined the board in April 2021.
Managing Director, Chile, and Chief Financial Officer of Marimaca Copper Corp. since 2023. 15+ years in international mining finance and M&A. Career: Senior/General Manager of Business Development and M&A, SQM (2016-2023, real major Chilean lithium/mining company); Non-Executive Director, Kore Potash Plc (2018-2020); Mining Investment Fund Manager, EPG Partners SA (2011-2016, private equity). Civil Engineer by training, based in Santiago, Chile.
Chilean geologist with 30+ years' experience, credited with involvement in significant copper discoveries. NI 43-101 Qualified Person and JORC Competent Person, member of Colegio de Geólogos de Chile and the Institute of Mining Engineers of Chile. Holds a Bachelor's in Geology and a Master's in Economic Geology from Universidad Católica del Norte. Joined Marimaca in November 2011.
Insiders, Investors & Smart Money
Notable shareholders and insiders whose involvement is worth knowing about, plus what we're seeing from institutional/large-investor activity.
Assore International Holdings, the offshore arm of the South African mining house Assore, is Marimaca's anchor shareholder and has kept writing cheques. It took 14.99% in August 2024 for C$68M -- C$42.4M buying shares from Tembo Capital plus a C$25.8M placement -- then bought 756,695 more shares at C$10 in September 2025 and another 4,170,000 at C$10 in February 2026, roughly C$49M of follow-on cash. Greenstone Resources, the mining private equity firm that backed the company early, is going the other way: it has fallen from 22.28% to around 6% through an in-specie distribution to its partners and two secondary offerings. Management has been selling steadily too -- four directors and officers sold across the past year, with no offsetting open-market buying.
No notable insiders tracked for this miner yet.
Reports, Presentations & Documents
August 2025 DFS: 50ktpa nominal copper cathode production, 13-year mine life, US$587M initial capex, post-tax NPV8% of US$709M at US$4.30/lb Cu, 31%+ IRR, 2.5-year payback. Maiden reserve ~434Mlbs contained Cu (P&P). Resource: 70.4Mt at 0.60% Cu (M&I) plus 43Mt at 0.52% Cu (Inferred).
Marimaca Copper's Definitive Feasibility Study for the Marimaca Oxide Deposit in Chile's Antofagasta Region (announced 25 Aug 2025) outlines a conventional open pit feeding a nominal 50ktpa copper cathode heap-leach/SX-EW operation over a 13-year reserve life. Post-tax NPV8 of US$709M and post-tax IRR of 31% at a flat long-term US$4.30/lb copper price, with a 2.5-year payback on US$587M of initial capital -- a capital intensity of about US$11,700 per annual tonne of copper capacity. At US$5.05/lb copper the NPV8 rises to US$1.1B with a 39% IRR. Maiden Proven and Probable Reserves of 178.6Mt @ 0.42% Cu for 750,000t of contained copper. Steady-state C1 of US$1.69/lb and AISC of US$2.09/lb.