South32
A globally diversified mining and metals company spun out of BHP in 2015.
Last updated August 31, 2026
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Overview
South32 Limited is an Australia-based diversified mining and metals company headquartered in Perth, Western Australia. The company was created through the demerger of selected assets from BHP Billiton and began trading as an independent business on 18 May 2015. Its portfolio spans bulk commodities, base metals, precious metals, and processed mineral products, giving it exposure to several stages of the resources value chain rather than to a single mineral or region. South32's production and investments include bauxite, alumina, aluminium, manganese, nickel, copper, molybdenum, silver, lead, zinc, metallurgical coal, and gold. Its operating footprint has included Australia, South Africa, Mozambique, Colombia, Brazil, Chile, and the United States. The portfolio includes mines, refineries, smelters, development options, and minority interests in integrated businesses. This structure reflects the company's strategy of maintaining a diversified set of assets while concentrating capital on commodities and projects that it considers competitive and strategically valuable. In Australia, the company has interests in the Australia Manganese business, including the GEMCO manganese operation on Groote Eylandt; the Cannington silver, lead, and zinc mine in Queensland; and the Worsley Alumina business in Western Australia. Worsley combines bauxite mining with alumina refining, and part of its alumina production has historically supplied South32's aluminium smelters in Africa. The company has also held interests in other Australian processing assets, including the TEMCO manganese smelter in Tasmania, which was sold in 2021. South African operations and interests have included the Wessels underground and Mamatwan open-cut manganese mines, the Hillside aluminium smelter at Richards Bay, and the Metalloys manganese alloy smelter. Its South African thermal-coal business, South Africa Energy Coal, was sold to Seriti in 2021, while Metalloys was sold in June 2025 according to the supplied reference material. In Mozambique, South32 holds an interest in the Mozal aluminium smelter near Maputo. The supplied operations reference identifies Mozal as being placed into care and maintenance as of 16 March 2026. The company's Americas portfolio includes the Cerro Matoso nickel mine and smelter in Colombia, the Mineração Rio do Norte bauxite mine and Alumar alumina refinery and aluminium smelter in Brazil, and a 45% interest in the Sierra Gorda copper and molybdenum mine in Chile. In the United States, South32 has development interests in the Hermosa project in Arizona and Ambler Metals in Alaska. These projects provide potential future exposure to metals used in industrial production, infrastructure, energy systems, and technology supply chains. South32 is listed on the Australian Securities Exchange and has secondary listings on the Johannesburg and London stock exchanges. Its brand is associated with large-scale resource development, international mining operations, mineral processing, portfolio management, and the divestment or restructuring of assets that no longer fit its strategic priorities. The company remains active, although the composition of its portfolio continues to change through project development, operational transitions, and asset sales.
History
South32 was formed through a corporate demerger from BHP Billiton. The separation was designed to create an independent mining company focused on a portfolio of assets that differed from BHP's larger iron-ore, petroleum, copper, and coal businesses. South32 commenced trading on 18 May 2015, establishing its headquarters in Perth and listings on the Australian Securities Exchange, with secondary listings in Johannesburg and London. From inception, South32 inherited a geographically dispersed portfolio covering mining and metals production in Australia, southern Africa, and the Americas. Its assets included bauxite and alumina operations, aluminium smelters, manganese mines and processing facilities, base-metal mines, nickel production, and interests in coal and other commodities. The portfolio was intended to provide commodity and regional diversification while retaining exposure to established operations with long operating histories. The Australian portfolio became an important foundation of the company. South32 retained interests in the GEMCO manganese mine through Australia Manganese, operated the Cannington silver, lead, and zinc mine in Queensland, and held a substantial interest in Worsley Alumina in Western Australia. Worsley integrates bauxite mining and alumina refining, supporting the company's broader aluminium supply chain. South32 also participated in the Mineração Rio do Norte bauxite mine in Brazil and the Alumar alumina refinery and aluminium smelter, extending that value chain into South America. The company has periodically reshaped its portfolio through divestments. In January 2021, it sold the TEMCO manganese smelter in Tasmania to GFG Alliance. In June of the same year, it sold South Africa Energy Coal to Seriti. These transactions reduced exposure to assets that were less aligned with the company's portfolio priorities and contributed to a greater emphasis on metals and operations considered strategically important for future demand. The supplied reference material also records the sale of Metalloys in South Africa in June 2025. South32's southern African aluminium and manganese interests have remained central to its identity. The company has held the Hillside aluminium smelter in South Africa, manganese mines at Hotazel in the Northern Cape, and a significant interest in the Mozal aluminium smelter near Maputo, Mozambique. The supplied reference states that Mozal entered care and maintenance as of 16 March 2026, illustrating the operational and commercial pressures that can affect energy-intensive smelting businesses. In the Americas, South32 has operated or invested in a wide range of mineral assets. Cerro Matoso in Colombia combines nickel mining and smelting. Sierra Gorda in Chile provides exposure to copper and molybdenum, while the Hermosa project in Arizona and Ambler Metals in Alaska represent development options in the United States. These interests broaden the company’s exposure to metals used in construction, industrial manufacturing, electrical applications, transport, and potential energy-transition supply chains. Across its history, South32 has therefore been defined less by a single flagship mine than by active management of a diversified portfolio. Its business model combines direct operating control, minority interests, integrated refining and smelting, and staged development of resource options. The company's continuing evolution depends on commodity prices, energy availability, permitting, capital discipline, operating performance, and decisions about which assets and projects best fit its long-term strategy.
- 2026
Mozal enters care and maintenance
[1]The supplied reference identifies the Mozal aluminium smelter as being in care and maintenance as of 16 March 2026.
- 2025
Metalloys is sold
[1]The Metalloys manganese-alloy smelting business in South Africa was sold in June 2025, according to the supplied reference material.
- 2021
TEMCO is divested
[1]South32 sold the TEMCO manganese smelter in Tasmania to GFG Alliance in January 2021.
- 2021
South Africa Energy Coal is divested
[1]South32 sold its South African thermal-coal business to Seriti in June 2021.
- 2015
South32 is established through the BHP demerger
[1]South32 was spun out of BHP Billiton and began trading as an independent company on 18 May 2015.
Products and positioning
A globally diversified mining and metals producer with a portfolio spanning bulk commodities, base metals, precious metals, refining, smelting, and mineral-development projects.
Industrial minerals and refining
Bauxite and alumina
South32 produces bauxite and alumina through assets including Worsley Alumina in Western Australia and its interests in Mineração Rio do Norte and Alumar in Brazil. Worsley combines an open-pit bauxite mine with an alumina refinery, while the Brazilian interests extend the company's participation into mining, refining, and aluminium production.
Primary metals
Aluminium
The company's aluminium portfolio has included the Hillside smelter in South Africa, the Mozal smelter in Mozambique, and the Alumar smelter in Brazil. These energy-intensive facilities convert alumina into primary aluminium for industrial and manufacturing markets. The supplied reference states that Mozal was in care and maintenance as of March 2026.
Bulk and alloying metals
Manganese
South32's manganese interests include the GEMCO mine on Groote Eylandt and the Wessels underground and Mamatwan open-cut mines at Hotazel in South Africa. Manganese is used principally in steelmaking and alloy production. The company's former TEMCO smelter in Tasmania was sold in 2021, and Metalloys was sold in 2025 according to the supplied reference.
Base metals
Nickel
Cerro Matoso in northern Colombia includes nickel mining and smelting operations. Nickel is used in stainless steel, alloys, and selected battery technologies. The asset represents South32's principal identified nickel business in the supplied portfolio description.
Base and specialty metals
Copper and molybdenum
South32 holds a 45% interest in the Sierra Gorda mine in Chile's Atacama Desert near Calama. The operation produces copper and molybdenum, providing exposure to metals used in electrical infrastructure, construction, industrial equipment, and high-performance alloys.
Mineral development
Development options
The Hermosa resource development option in southern Arizona and the 50%-owned Ambler Metals interest in Alaska give South32 a pipeline of potential future mineral projects in the United States. These assets are development-stage interests rather than equivalent to the company's established producing operations.
Controversies
2021
EPA fines Dendrobium mine over coal sludge release
The Environmental Protection Authority fined the Dendrobium coal mine $15,000 for breaching its environmental protection licence after coal sludge entered local waterways. South32 owns the mine. The EPA said the mine caused or permitted water with high turbidity and suspended solids to flow into Brandy and Water Creek from an unauthorized discharge point.
Brand decisions
2025
Divest MetalloysM&ABackground
The supplied reference records a further restructuring of South32's South African manganese-processing interests.
Action taken
Metalloys was sold in June 2025.
Aftermath
The Metalloys smelting business was removed from South32's portfolio.
2021
Divest TEMCOM&ABackground
South32 reviewed its manganese-processing portfolio and the strategic fit of the Tasmanian TEMCO smelter.
Action taken
The company sold TEMCO to GFG Alliance in January 2021.
Aftermath
TEMCO ceased to be part of South32's operating portfolio.
2021
Divest South Africa Energy CoalM&ABackground
South32 pursued a portfolio shift away from its South African thermal-coal assets.
Action taken
South Africa Energy Coal was sold to Seriti in June 2021.
Aftermath
South32 exited that South African thermal-coal business and increased the relative importance of its metals portfolio.
2015
Separate selected BHP assets into South32M&ABackground
BHP Billiton sought to separate a portfolio of assets into a standalone company with a different commodity and geographic mix.
Action taken
The selected assets were demerged into South32, which began independent trading on 18 May 2015.
Aftermath
South32 became an independently listed international mining company with primary trading in Australia and secondary listings in Johannesburg and London.
Recent events
EPA fines Dendrobium mine over coal sludge release[3]
Reported:
The Environmental Protection Authority fined the Dendrobium coal mine $15,000 for breaching its environmental protection licence after coal sludge entered local waterways. South32 owns the mine. The EPA said the mine caused or permitted water with high turbidity and suspended solids to flow into Brandy and Water Creek from an unauthorized discharge point.
- Unconfirmed
South32 shareholders endorse aluminium business sale plan[4]
South32 said its shareholders had endorsed its plan to sell its aluminium business.
Sources4 sources
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