Gold Copper Asia Indonesia Senior Producer
Indonesia Stock Exchange (IDX): AMMN OTCQX (OTC): AMMNF

Amman Mineral Internasional PT

$38.4B
Last updated: 08/17/2025

Overview

Amman Mineral Internasional PT is a senior gold and copper producer headquartered in Jakarta, Indonesia, operating primarily in Asia. The company's portfolio consists of 2 projects, comprising 1 operating mine and 1 development project. Key assets include Batu Hijau and Elang. The organization's business model is centered on being a fully integrated, technology-driven operator with a reputation as one of the world's lowest-cost producers. A key competitive advantage stems from its production of high-quality, exceptionally clean concentrate, which is in high demand for its blending properties. The enterprise has developed comprehensive and advanced infrastructure assets for mineral processing, power generation, and multi-modal transportation to support its large-scale operations. Its marketing strategy focuses on maintaining a diversified sales portfolio across two segments: direct sales to smelters and distribution through global trading partners. This dual approach allows for market expansion and risk mitigation. The company is transitioning its product portfolio to include higher-value refined metals, leveraging its newly established downstream processing capabilities to capture more of the value chain. This integration from raw material extraction to final product refining is a core element of its operational philosophy and market positioning.

Strategy

Strategic direction is guided by an ambitious digital transformation initiative, in partnership with Arpinine Intelligence, aimed at integrating data across the value chain to enhance real-time insights, risk anticipation, and operational agility. A core objective is the expansion of its integrated value chain, marked by the commissioning of new downstream processing facilities to transition from concentrate sales to higher-value refined metal production. This includes expanding processing plant input capacity to accommodate future growth. Capital allocation is focused on completing these large-scale expansion projects, including a new 450 MW power plant and associated LNG infrastructure, to ensure stable, uninterrupted power for all operations. The company refreshed its corporate vision, mission, and core values in 2024 to emphasize a culture of innovation, efficiency, and measured risk-taking, aligning its workforce with its evolution into a technology-driven resources company. The strategy also involves a disciplined approach to cost management and operational efficiency to maintain its position as a low-cost producer.

Management

The governance structure is led by a 4-member Board of Commissioners, including 2 independent commissioners, and a 5-member Board of Directors. The Board of Commissioners is supported by an Audit Committee and a Nomination & Remuneration Committee. The Board of Directors is supported by an ESG Steering Committee and an Enterprise Risk Management Committee. Executive leadership is headed by President Director Alexander Ramlie, who has an extensive background in investment banking and the resources sector. The governance framework mandates regular oversight, including joint board meetings held at least once every 4 months. The company has implemented a formal self-assessment policy for both the Board of Directors and the Board of Commissioners to evaluate performance against defined duties and responsibilities, with the Nomination & Remuneration Committee providing evaluation criteria. A comprehensive Code of Business Ethics and Conduct is in place, with mandatory annual training and signed affirmations required from all employees and business partners to ensure consistent adherence to ethical standards.

Sustainability

The organization's commitment to responsible production was validated in 2024 with the achievement of The Copper Mark certification, an independent assurance framework for the industry. Decarbonization efforts are focused on transforming the energy mix for its operations, including the integration of a 26.8 MWp solar power facility and the construction of a new 450 MW gas-fired power plant with supporting LNG infrastructure. Community development programs are a key focus, with initiatives in early childhood education, health, ecotourism, and local enterprise development. The company has a formal Responsible Supply Chain Policy that governs the selection and management of vendors, incorporating screening, due diligence, and performance reviews against key HSEC requirements. A formal Whistleblowing System, known as the AMMAN Ethics Line, is managed by an independent third party, Deloitte, to ensure confidentiality and professionalism in handling reports of misconduct. The company also has a strict anti-corruption policy, supported by a gift registry system and annual gratuity reporting requirements.

Structure

The Group's ownership includes several major institutional shareholders, with PT Sumber Gemilang Persada, PT Medco Energi Internasional Tbk, and PT AP Investment holding significant equity stakes. The corporate structure includes several wholly-owned operating subsidiaries responsible for distinct business activities, including mining and processing (AMNT), industrial processing and downstream facilities (AMIN), and gas and power infrastructure (ANG). A key strategic alliance was formed in 2017 when the Group's subsidiaries acquired a significant stake in Macmahon Holdings Limited, a publicly listed Australian mining contractor. This transaction established a long-term, life-of-mine alliance-style contract for earthmoving and mining services, integrating a key supplier into its operational framework. The company has also established joint ventures, such as with PT Medcopower Solar Sumbawa (MPSS) for the operation of a solar power facility, to support its operational and sustainability objectives through strategic partnerships.

Source

Pt Amman Mineral Internasional Tbk - Annual Report - 2024

Batu Hijau
100.00%
🇮🇩 West Nusa Tenggara, Indonesia
operating, open pit
Annual production: 250 - 500 Mlb Cu (medium)
Resource base: > 20000 Mlb Cu (very high)
Average Grade 0.5 - 1 % (low)
Annual production: > 500 koz au (very high)
Resource base: > 10 moz au (very high)
Average Grade < 1 g/t (very low)
Elang
100.00%
🇮🇩 West Nusa Tenggara, Indonesia
development, open pit
Annual production: N/A
Resource base: > 20000 Mlb Cu (very high)
Average Grade 0.5 - 1 % (low)
Annual production: N/A
Resource base: > 10 moz au (very high)
Average Grade < 1 g/t (very low)
Last update: 07/04/2025
  1. Project should be interpreted as a single, group or complex of mines, deposits or other mineral assets. Name of the project should be identical to the official company naming convention.
  2. The ranges of values provided are indicative and should not be regarded as exact figures.
  3. Figures for exploration and development projects are based on available data and are indicative only; actual values may vary substantially.
  4. Royalties frequently apply to specific mineralized areas that may not coincide exactly with the boundaries of the overall project. As a result, even if a mine is currently in operation, the portion subject to the royalty may not be included in extraction activities until future years.
  5. Commodities are listed from most dominant to least dominant. Only selected commodities are shown.
  6. Table might not include all projects that are currently owned by the company. Displayed data are snapshots of the company's projects in time and might not be up to date.
  7. Exploration projects are partially represented in the table. Only projects with mineralization or strategic importance are shown.
  8. Companies might own processing facilities that are not included in the table. Those facilities play important role especially for companies operating in uranium, nickel and lithium sectors.
  1. Chart is always based on the company's primary listing.
  1. Presented values are denominated in currency of the country where the company is headquartered. Values like market capitalization might differ from the values visible in other parts of the page, where the currency is always USD.
Commodity Units
  1. koz au: Thousand ounces of gold (production volume)
  2. moz au: Million ounces of gold (resource base or production volume)
  3. g/t: Grams per tonne (grade of gold or silver in ore)
  4. usd/oz au: US dollars per ounce of gold (cost metric)
  5. moz ag: Million ounces of silver (resource base or production volume)
  6. g/t ag: Grams per tonne of silver in ore (grade)
  7. usd/oz ag: US dollars per ounce of silver (cost metric)
  8. kt cu: Thousand tonnes of copper (production volume)
  9. mt ore: Million tonnes of ore (resource base for copper)
  10. %: Percent copper or uranium in ore (grade)
  11. usd/lb cu: US dollars per pound of copper (cost metric)
  12. mlb U3O8: Million pounds of uranium oxide (U3O8) (production or resource base)
  13. % eU3O8: Percent equivalent uranium oxide in ore (grade)
  14. usd/lb u3o8: US dollars per pound of uranium oxide (cost metric)
Mining Methods
  1. Open Pit: Surface mining method using large excavated terraces to extract ore
  2. Underground: Subsurface mining through shafts, tunnels, and chambers
  3. ISR (In-Situ Recovery): Solution mining method using chemical leaching without excavation
Mine Development Stages
  1. Exploration: Early-stage project searching for and defining mineral deposits
  2. Development: Mine under construction or preparation for production
  3. Operating: Active mine currently extracting and processing ore
  4. Expansion: Mine temporarily suspended or with limited production, in progress to increase production in the future
  5. Reclamation: Mine permanently closed or no longer producing, but the site is being rehabilitated
Resource Categories
  1. P&P (Proven and Probable Reserves): Highest confidence mineral resources with detailed mine plans, it's a subset of M&I
  2. M&I (Measured and Indicated Resources): Well-defined resources with good geological confidence
  3. Inf (Inferred Resources): Estimated resources with limited geological confidence
Project Assessment Studies
  1. Scoping Study: High-level assessment to determine if a project warrants further investigation
  2. PEA (Preliminary Economic Assessment): Initial economic evaluation of a mineral project
  3. Pre-Feasibility (Preliminary Feasibility Study): Intermediate-level technical and economic assessment
  4. Feasibility (Definitive Feasibility Study): Comprehensive technical and economic evaluation for investment decisions
  5. BFS (Bankable Feasibility Study): Detailed study meeting lender requirements for project financing
Financial Metrics
  1. NPV (Net Present Value): Discounted value of future cash flows minus initial investment
  2. IRR (Internal Rate of Return): Discount rate that makes NPV equal to zero
  3. Payback Period: Time required to recover initial capital investment from project cash flows
  4. AISC (All-In Sustaining Cost): Total cost per ounce including sustaining capital and corporate costs
Royalty & Streaming
  1. Royalty: Payment to landowner/government based on percentage of production value or revenue
  2. Stream: Agreement to purchase future production at predetermined price, often below market rate
  3. NSR (Net Smelter Return): Royalty based on net revenue after smelting and refining costs
  4. GRR (Gross Revenue Royalty): Royalty based on total gross revenue before any deductions
  5. NPI (Net Profits Interest): Royalty based on net profits after operating costs and capital recovery

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