Highlights

  • South32's March 2026 quarterly report delivered a record distribution of US$135 million from Sierra Gorda (South32 share) and an Hermosa FAST-41 Federal permitting milestone with issuance of the Final Environmental Impact Statement and Draft Record of Decision. Net cash increased by US$121 million to US$96 million in the March quarter.
  • Brazil Alumina achieved record production in Q1 FY26, aluminium production was broadly flat year-on-year with Hillside testing maximum technical capacity, and Mozal Aluminium transitioned to care and maintenance as planned in March — exceeding its production guidance by 3%. Australia Manganese FY26 production guidance was revised lower by 6% due to elevated site water levels and wet season rainfall impacts.
  • S32 shares eased AUD 0.030 (0.680%) to AUD 4.380 on volume of 4,310,470 and a market cap of AUD 19.78 billion on 22 April 2026.

South32 (ASX:S32) shares eased AUD 0.030, or 0.680%, to AUD 4.380 during morning trading on 22 April 2026, on volume of 4,310,470 shares with a bid-offer spread of AUD 4.370 to AUD 4.380 and market capitalisation of AUD 19.78 billion. The minor session decline on a quarterly report release day is consistent with a broadly neutral market reception to a quarterly that delivered both positive (record Sierra Gorda distribution, Hermosa milestone) and negative (Australia Manganese guidance cut, higher Middle East cost pressures) outcomes simultaneously.

Sierra Gorda Record Distribution and Financial Position

Sierra Gorda — the copper-molybdenum operation in Chile — delivered a record quarterly distribution of US$135 million to South32 (its share) in the March 2026 quarter. This result brings South32's share of net distributions from equity-accounted investments to US$375 million for the nine months ended March 2026, comprising US$315 million from Sierra Gorda and US$60 million from its manganese business. The record Sierra Gorda distribution is an important source of cash flow for South32's financial flexibility.

Net cash for South32 increased by US$121 million to US$96 million during the March 2026 quarter, benefitting from continued strength in aluminium and base metals markets and the Sierra Gorda distribution, despite investing US$158 million in growth capital expenditure at the Hermosa project. Following the end of the quarter, South32 paid a fully-franked interim ordinary dividend of US$175 million in respect of the December 2025 half year.

Hermosa: FAST-41 Milestone and June Quarter Capital Assessment

The Hermosa project in Arizona, USA, reached a key Federal permitting milestone during the March quarter with the issuance of the Final Environmental Impact Statement (FEIS) and Draft Record of Decision under the FAST-41 federal permitting process. This is a significant step in the permitting pathway for Hermosa's Taylor zinc-lead-silver project. South32 noted that it is on track to complete an assessment of project milestones and capital expenditure for Taylor during the upcoming June 2026 half year, as additional underground and surface infrastructure packages are awarded.

South32 invested US$239 million in Group capital expenditure (excluding equity-accounted investments and Hermosa) in the nine months ended March 2026. A total of US$158 million was invested in growth capital at Hermosa in the March quarter alone, underscoring the pace of development spending on what will be South32's most significant near-term growth asset.

Production Highlights, Guidance Changes, and Middle East Impacts

Brazil Alumina achieved record production in the quarter, while aluminium production was largely unchanged year-to-date with Hillside Aluminium continuing to test its maximum technical capacity. Brazil Aluminium finished the quarter with improved pot stability and output, tracking ahead of current guidance. Cannington mitigated significant floods in northwest Queensland, with third-party rail access restored late in the quarter and the operation remaining on track to deliver production guidance.

Australia Manganese FY26 production guidance was revised 6% lower due to elevated site water levels and impacts from wet season rainfall and Tropical Cyclone Narelle. South32 noted that the Middle East conflict has resulted in higher global freight rates and raw material input prices — specifically higher diesel, caustic soda, and other input costs — which are expected to drive cost inflation should these pressures continue. The company confirmed it is not currently experiencing diesel fuel shortages but is monitoring the situation closely and has implemented supply chain mitigation measures.

Conclusion

South32's 0.680% session easing to AUD 4.380 on 4.31 million shares and a market cap of AUD 19.78 billion on 22 April 2026 reflects a quarterly report with mixed but broadly constructive signals: record US$135 million Sierra Gorda distribution, Hermosa FAST-41 permitting milestone, record Brazil Alumina production, net cash improving to US$96 million, and Mozal successfully transitioned to care and maintenance — offset by a 6% reduction in Australia Manganese guidance and Middle East-related cost inflation pressures that South32 is monitoring closely.