South32: the mines it operates or owns, and what they report

South32 is a listed company headquartered in Australia (ASX / LSE / JSE: S32). This site lists 4 operations tied to it, for bauxite and aluminum: it operates 1 and holds an interest in 3 more. On the operations here where a whole-operation figure can be stated (in metal content, or as the commodity page says for ore and smelted metal), its interests add up to about 1,215,800 tonnes of primary aluminum (1.6% of world output) and 3,814,800 tonnes of bauxite (0.9% of world output). That leaves out operations without such a figure, so it is not the company's total.

Its operations on this site

Operations of South32
Operation	Commodity and country	Role	Interest	Whole-operation output	Share of world output
Porto Trombetas (Mineracao Rio do Norte) open-pit mine	bauxite Brazil	Owner	33% as of 30 June 2026	11,560 thousand tonnes ('000 tonnes), marketable quantities of ore plus concentrates CY2025	2.6%
Hillside Aluminium aluminum smelter	aluminum South Africa	Operator	100% as of 1 July 2026	717 kt, 'Aluminium production' (saleable production) FY2026 (1 July 2025 to 30 June 2026)	1%
Mozal Aluminium aluminum smelter	aluminum Mozambique	Owner	63.7% as of 20 July 2026	about 557,000 t of aluminum FY2025 (1 July 2024 to 30 June 2025), derived	0.8%
Alumar smelter (São Luís) aluminum smelter	aluminum Brazil	Owner	40% as of 20 July 2026	about 360,000 t of aluminum FY2026 (1 July 2025 to 30 June 2026), derived	0.5%

How much is that on its interests?

aluminum: 1,215,800 tonnes of primary aluminum across 3 operations, about 1.6% of world output. Periods differ by operation (FY2026 (1 July 2025 to 30 June 2026), FY2025 (1 July 2024 to 30 June 2025)). At least one whole-operation figure is derived from an owner's share; see that operation's page.
bauxite: 3,814,800 tonnes of bauxite across 1 operation, about 0.9% of world output. Periods differ by operation (CY2025).

Computed as each operation's whole-operation output in metal content, or as ore or smelted metal where the commodity is measured that way, multiplied by the interest shown. Operations whose output is stated in another form, or only as the owner's share, are left out of this sum, so it understates what the company controls.

Sources

South32 Limited: Agreement to Sell Aluminium Value Chain Assets to Alcoa for up to US$5.6B and Chief Executive Officer Transition (stock-exchange announcement (2026-07-01; text read in the Investegate copy of the RNS), announcement of 1 July 2026). Opened 4 November 2026.
South32 Limited: Annual Report 2026 (annual report (ASX announcement 2026-08-27), FY2026 (July 2025 to June 2026)). Opened 4 November 2026.

The corporate facts above (headquarters, type, listing) come from the sources listed; no stock prices, valuations or executives are shown. Ownership and output are on the date and period stated on each operation's page. The list covers operations with a published figure for the commodities on this site, so it is not the company's full portfolio.

Made with AI assistance and checked against the sources by a second, independent pass; no professional review took place. How the site is made. To report an error, contact us.