Antam ferronickel, Kolaka: a nickel operation in Indonesia

Antam ferronickel, Kolaka is a ferronickel operation producing nickel in Kolaka, Indonesia, operated by Antam. The sources report 16,064 tons of nickel in ferronickel (TNi) for CY2025; the basis is consolidated company production. In nickel content, whole-operation output for CY2025 is 16,064 tonnes: about 0.4% of world nickel output in 2025 and about 0.6% of Indonesia's; it is one of 8 operations on this site whose output can be stated in nickel content.

Who owns and operates it?

Interests are as stated in the sources below on the date shown. Ownership changes with deals, so a stake may have changed since the date shown.

How much does it produce?

Between CY2024 and CY2025 the reported figure fell by 20.1%, in the same unit and on the same basis.

How the nickel-content figure is worked out. Antam reports 16,064 tons of nickel in ferronickel as its consolidated production for January to December 2025. World mine production of nickel in 2025 was 3,900,000 tonnes (USGS Mineral Commodity Summaries 2026); Indonesia produced 2,600,000 tonnes.

Status: operating, as of 31 December 2025.

• The report names the ferronickel operations in Kolaka and does not split the figure between plants. Antam says its nickel ore was allocated to support Indonesia's class two nickel industry and to supply feed for its own ferronickel operations; ore is reported in wet metric tonnes and is not nickel content.
• The figure is nickel in the processed product (nickel pig iron, ferronickel, mixed hydroxide or sulfide), not nickel mined, and it is compared with USGS mine production, so the share of world output is indicative.

How does it compare?

Other nickel operations on this site: Weda Bay Nickel, Société Le Nickel (SLN), Nickel Industries' four RKEF plants, Huayue Nickel Cobalt (nickel), Taganito HPAL (THPAL), Coral Bay Nickel (CBNC), Nornickel group (Norilsk and Kola), Sudbury (Vale), Thompson (Vale), Voisey's Bay (Vale), Onça Puma, Integrated Nickel Operations (Glencore). In Indonesia: Weda Bay Nickel, Nickel Industries' four RKEF plants, Huayue Nickel Cobalt (nickel). See where nickel comes from for the country totals, the country page for Indonesia, and Antam for its other operations here.

Sources

• PT Antam Tbk: Quarterly Report, twelve-month period ended 31 December 2025 (unaudited) (ASX quarterly report (announced 30 January 2026); copy from the Aspect Huntley ASX data feed, the ASX original was not separately fetched, 4Q25 and FY25 (calendar)). Opened 3 November 2026; used: PDF pp.1, 2, 3, 4.
• U.S. Geological Survey: Mineral Commodity Summaries 2026: Nickel (government statistical summary, 2025 (world and country mine production)). Opened 3 November 2026; used: world and country mine production table.

Method and limits

• Reported, not estimated. Output is the figure the operator or owner published, in the unit it used. This site does not estimate output where none is published.
• Shares. A share divides output in nickel content by the USGS world or country total for 2025. Where the operator's year is a fiscal year or the unit is a concentrate or a carbonate equivalent, the share is approximate or not given.
• Whole operation or owner's share. The basis column says which. A joint venture's output is never counted twice.
• Partial list. Only operations with a published figure are listed, so the rank is among those on this site, not among every nickel mine. Shares of a country's output mix periods and bases, so treat them as indicative.
• Made with AI assistance, checked against sources. The facts were gathered from the documents above by AI-assisted research and re-checked against those documents by a second, independent pass; the page text is generated from the data. No professional review took place. How the site is made. To report an error, contact us; fixes are logged on the corrections page.