PT Indonesia Asahan Aluminium

What PT Indonesia Asahan Aluminium does

PT Indonesia Asahan Aluminium (INALUM) is Indonesia's only state-owned primary aluminum smelter and the country's sole integrated domestic producer of the metal. Founded in 1976 and headquartered at Kuala Tanjung in Kabupaten Batubara, North Sumatra, the company operates an aluminum smelter with a current maximum capacity of up to 250,000 tons per year, producing aluminium ingot, billet, and alloy at 99.90% purity. Smelting is powered entirely by captive hydroelectric generation from the Asahan River (supplied by Lake Toba) via the Siguragura and Tangga power plants and three dams (Pengatur, Siguragura, Tangga), giving INALUM a structurally low electricity input cost. Vertically adjacent operations include an integrated ISP carbon plant (raw carbon, roasting, anode assembly), a captive deepwater port at Kuala Tanjung for raw material intake and product export, and storage facilities.

INALUM is 100% owned by the Government of Indonesia through PT Mineral Industri Indonesia (MIND ID), the state mining holding that also comprises Antam, Bukit Asam, Timah, Freeport Indonesia, and Vale Indonesia. The company's wholly-owned subsidiaries include PT Borneo Alumina Indonesia (bauxite-to-alumina refining in West Kalimantan), PT Indonesia Aluminium Alloy (alloy and billet at Kuala Tanjung), and PT Nasional Hijau Lestari (waste treatment). Revenue is generated through B2B industrial sales of aluminum products — approximately 80% to domestic Indonesian buyers and 20% exported via the Kuala Tanjung port — across transportation, construction, renewable energy, defense, and green-technology end-markets, transacted through quote-based, multi-year contracts handled by the Jakarta and Kuala Tanjung Sales & Marketing offices.

INALUM is currently executing a major downstream expansion under the Indonesia Investment Authority (Danantara) and MIND ID: a US$3 billion (Rp50 trillion) integrated bauxite-alumina-aluminum facility in Mempawah, West Kalimantan, expected to add 600,000 tons per year of aluminum smelter capacity, 2 million tons per year of alumina capacity, and 1.2 GW of captive power generation by 2028, alongside the creation of roughly 1,370 jobs. The Mempawah build-out more than triples INALUM's eventual metal output, integrates upstream bauxite processing, and positions the company as the strategic national champion supplying Indonesia's downstream industrialization in transportation, renewable energy, defense, and green technology verticals.

Name

PT Indonesia Asahan Aluminium

Legal name

PT Indonesia Asahan Aluminium (Persero)

Website

https://inalum.id

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

INALUM is Indonesia's only state-owned primary aluminum smelter, producing ingot, billet, and alloy at its Kuala Tanjung, North Sumatra facility using hydroelectric power from the Asahan River and serving domestic industrial and export markets via B2B sales.

Ownership category

akta.pro rank

Product category

Primary Aluminum Production

NAICS

Alumina Refining and Primary Aluminum Production (331313), Alumina and Aluminum Production and Processing (33131)

SIC

Primary Production Of Aluminum (3334), Primary Smelting & Refining Of Nonferrous Metals (3330)

akta.pro primary industry

Primary Aluminum Smelting (IMAKACAC)

akta.pro secondary industries

Alumina Refining (Bayer Process) (IMAKACAB), Aluminum Smelter/Refinery Technology, Equipment & Refractories (IMAKACAL)

Keywords

• Primary aluminum smelting
• Aluminum ingot billet alloy
• Bauxite alumina processing
• Hydropower aluminum production
• Industrial aluminum manufacturing

Headquarters

HQ city

Jakarta

HQ country

Indonesia

HQ region

Asia

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Infrastructure, Personnel, Technology or R&D

Revenue model

1. Aluminum Product Sales: INALUM generates revenue primarily from the sale of aluminum products including ingot, billet, and alloy. Approximately 80% of production is sold domestically in Indonesia, with the remaining ~20% exported to international markets. Products achieve 99.90% purity quality standards. The company also manufactures non-aluminum products.
2. Bauxite-to-Alumina Downstream Processing: As part of MIND ID, INALUM (along with Antam and Bukit Asam) is developing a US$3 billion integrated bauxite-alumina-aluminum downstream facility in Mempawah, West Kalimantan, with a 600,000-ton-per-year aluminum smelter capacity, funded at approximately Rp50 trillion. This expands alumina production to 2 million tons per year by processing 6 million tons of bauxite ore annually.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

PT Indonesia Asahan Aluminium (INALUM) is Indonesia's largest state-owned primary aluminum producer, operating a vertically integrated smelting facility at Kuala Tanjung, North Sumatra powered by hydroelectric energy from the Asahan River. The company manufactures primary aluminum products (ingot, billet, and alloy) at 99.90% purity for industrial buyers, and is expanding into bauxite-to-alumina downstream processing through its Mempawah, West Kalimantan project.

Product overview

PT Indonesia Asahan Aluminium (INALUM) is a state-owned enterprise operating as Indonesia's largest primary aluminium producer. The company operates a unified manufacturing portfolio consisting of three core aluminium products manufactured at its Kuala Tanjung smelting facility: Aluminium Ingot (the primary product at 99.90% purity), Aluminium Billet for extrusion applications, and Aluminium Alloy for specialised industrial uses. Non-aluminium by-products are managed through subsidiary PT Nasional Hijau Lestari. The company operates at a maximum capacity of 250,000 tons per year, with 80% of production sold domestically and 20% exported internationally. Downstream expansion is underway through the Mempawah Smelter Grade Alumina Refinery project and PT Borneo Alumina Indonesia subsidiary for bauxite-to-alumina processing.

Differentiator

Problem solved

Functional benefit

Products and services

• Aluminum Ingot Primary aluminum product cast into ingots with 99.90% purity, produced at the Kuala Tanjung smelting plant as the main output for industrial buyers in transportation, construction, energy, and manufacturing sectors.
• Aluminum Billet Semi-finished aluminum product in cylindrical form used for extrusion processes in various manufacturing applications, serving downstream industrial fabricators.
• Aluminum Alloy Specialized aluminum product with controlled chemical composition designed for specific industrial applications requiring defined mechanical and physical properties.

Quantifiable outcome

• Current production capacity of up to 250,000 tons/year of aluminum, with plans to double capacity
• +3 more outcomes

Named customers2 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core and minor.

• PT Antam Indonesia (PT Aneka Tambang)coreStrategic or Co-development Partner · 7 February 2026ANTAM is a fellow member of the MIND ID holding and is collaborating with INALUM and Bukit Asam on the US$3 billion Mempawah downstream project. ANTAM contributes its bauxite mining expertise and resources to the integrated bauxite-alumina-aluminum facility.
• PT Bukit Asam (PTBA)coreStrategic or Co-development Partner · 7 February 2026PT Bukit Asam, a MIND ID holding member and coal producer, is collaborating with INALUM and ANTAM on the Mempawah downstream project. PTBA contributes to the project's energy and infrastructure requirements as part of the integrated aluminum value chain.
• MIND ID (Mining Industry Indonesia)coreStrategic or Co-development Partner · 1 January 2022INALUM is a member of the MIND ID (Mining Industry Indonesia) holding company, which is 100% owned by the Government of Indonesia. MIND ID comprises PT Aneka Tambang (Antam), PT Bukit Asam (PTBA), PT Timah, PT Freeport Indonesia, PT Vale Indonesia, and INALUM. The holding coordinates the downstream industrialization of Indonesia's mining sector, with INALUM serving as the national aluminum champion. INALUM's 100% share ownership is held by PT Mineral Industri Indonesia (MIND ID).
• PT Borneo Alumina IndonesiacoreStrategic or Co-development PartnerINALUM's subsidiary engaged in refining bauxite into alumina. Located in West Kalimantan, this subsidiary is part of INALUM's upstream expansion in the aluminum value chain, supporting the company's raw material self-sufficiency.
• PT Indonesia Aluminum AlloycoreStrategic or Co-development PartnerINALUM's subsidiary engaged in smelting Grade B and C aluminum, with a focus on alloy and billet products. Located in Kuala Tanjung, this subsidiary extends INALUM's downstream processing capabilities.
• PT Nasional Hijau LestariminorStrategic or Co-development PartnerINALUM's subsidiary engaged in waste treatment and management, supporting INALUM's environmental sustainability objectives and responsible operations.

Scale indicators9 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Norsk Hydro: Norwegian integrated aluminum producer with primary smelting powered predominantly by hydropower. Directly comparable to INALUM as a renewable-energy-powered primary aluminum producer selling semi-finished products (billets, ingot, alloys) globally and into transportation/construction markets.
• Chalco (Aluminum Corporation of China): Chinese state-owned integrated aluminum company producing alumina and primary aluminum at massive scale. Directly comparable to INALUM as a government-controlled national aluminum champion pursuing downstream value-add strategy and large-scale capacity additions.
• Alcoa Corporation: World's largest publicly listed aluminum producer with bauxite mining, alumina refining, and primary aluminum smelting assets across multiple geographies. Directly comparable in terms of integrated bauxite-to-aluminum operations and commodity-exposed business model.
• Hindalco Industries (Novelis): Indian primary aluminum producer with downstream rolled products businesses. Directly comparable as an emerging-economy integrated aluminum producer serving domestic transportation, packaging (beverage can), and construction markets at large scale.
• Vedanta Aluminium: Indian primary aluminum producer with captive power generation supplying ingot, billet, and rolled products. Comparable in scale and emerging-market primary aluminum positioning, with similar captive power and domestic-market orientation.
• RUSAL: Russian integrated primary aluminum producer with significant hydropower-powered smelting capacity. Directly comparable as a hydropower-based primary aluminum producer serving global commodity markets with similar product mix of ingot, billet, and alloys.
• Emirates Global Aluminium (EGA): UAE-based primary aluminum smelter producing foundry alloys, billets, and standard ingots. Directly comparable as a primary aluminum producer with strong government backing, exporting a major share of output into transportation, construction, and packaging markets.
• China Hongqiao Group: World's largest primary aluminum producer by capacity, vertically integrated from alumina to aluminum. Directly comparable as a primary aluminum producer competing on scale, cost, and integration with bauxite assets in Indonesia/SE Asia.

Broad incumbents

• Rio Tinto (Aluminium segment): Diversified global miner with primary aluminum and bauxite operations across Canada, Australia, and other geographies. Comparable as a major bauxite-aluminum producer but operates as a portfolio segment within a much larger mining conglomerate rather than as a focused aluminum champion.
• South32: Diversified miner with aluminum (Brazil, South Africa) and alumina operations as part of broader commodity portfolio. Comparable as a primary aluminum producer within a diversified mining group, but aluminum is one segment among several base metals and energy commodities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/INALUM_Official
• YouTubeyoutube.com/channel/UCrPnI_rPzOuuKk1jEhYERpA
• Facebookfacebook.com/PT-Indonesia-Asahan-Aluminium-Persero-1179421115414571
• LinkedInlinkedin.com/company/pt-indonesia-asahan-aluminium
• Instagraminstagram.com/inalum

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PT Indonesia Asahan Aluminium