Marimaca Copper Corp.
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. Endeavour Financial formally launched the project-debt financing process for MOD in May 2026, targeting announcement of a final funding strategy by Q4 2026; the principal SERNAGEOMIN sectorial permitting package was submitted Apr 2026, with land-easement negotiations with the Chilean government targeted for final approval in Q3 2026. Construction remains targeted to begin in 2027 (a 24-month build), with first cathode targeted for 2029. Endeavour Financial formally launched the project-debt financing process for MOD in May 2026, targeting announcement of a final funding strategy by Q4 2026; the principal SERNAGEOMIN sectorial permitting package was submitted Apr 2026, with land-easement negotiations with the Chilean government targeted for final approval in Q3 2026. Construction remains targeted to begin in 2027 (a 24-month build), with first cathode targeted for 2029.
Notable vs. Peers
- Financials score of 8/10 is stronger than the peer average of 5.5/10.
Lifecycle Milestones
Not in place: mill, tailings facility, grid power.
Jurisdiction (40%)8/10
Chile is one of the world's premier copper mining jurisdictions - deep institutional experience with large-scale copper projects, stable rule of law - though recent mining-royalty policy debates keep it just shy of a perfect score.
Infrastructure (40%)2.9/10
No confirmed mill, confirmed road access, no confirmed grid power, and no confirmed tailings facility at Marimaca Copper Project, Antofagasta Region, Chile.
Nearby producing mine (20%)9.2/10
Mantos Blancos (Capstone Copper Corp) is 32 km away -- within regional-platform range.
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:6.8/10
Nearest producing mine: Mantos Blancos (Capstone Copper Corp), 32 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:10/10
Stage: Feasibility Study
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:8/10
Chile: jurisdiction score 8/10
Our jurisdiction score, used as is: higher means lower political and permitting risk.
Weight 6.75% · 14% here - CommoditySub-score:8/10
Primary commodity: Copper
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
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. 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; also a non-executive director of G11 Resources Limited. 15+ years in international mining finance and M&A. Career: Senior/General Manager of Business Development and M&A, SQM (2016-2023, 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
Marimaca Copper is advancing the Marimaca copper oxide project in Chile's Antofagasta Region, designed as a heap-leach and SX-EW operation producing copper cathode, which received its environmental approval (RCA) in November 2025. The resource is 70.4 Mt at 0.60% copper in the measured and indicated categories plus 43 Mt at 0.52% inferred, and the maiden reserve contains about 434 million lb of copper. The August 2025 definitive feasibility study shows a post-tax NPV8% of US$709M and a 31% IRR at US$4.30/lb copper, with initial capital of US$587M, nominal output of 50,000 t of cathode a year over a 13-year mine life and an all-in sustaining cost of US$2.29/lb. Endeavour Financial launched the project-debt financing process in May 2026, targeting a final funding strategy by Q4 2026, and construction is targeted to start in 2027 with a 24-month build and first cathode in 2029.
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.