Highlights

  • South32 shares have gained over 50% in the past year, supported by Commodity tailwinds and project developments
  • Macquarie maintains an “Outperform” rating with a target price of AUD 4.50, indicating further upside potential
  • Hermosa project update highlights increased reserves, extended mine life, but also higher Capital Expenditure

South32 Ltd (ASX:S32) has delivered a notable share price performance over the past year, reflecting improving sentiment toward diversified miners and the company’s advancing project pipeline. As of 1 May, the stock closed at AUD 4.12, up 2.23% for the day, and has recorded a 50.36% gain over the past 12 months. The upward trajectory extends across shorter timeframes as well, with gains of 30.79% over six months and 16.06% year-to-date.

The rally in South32 shares has been driven by a combination of supportive Commodity prices, operational stability across its portfolio, and growing investor confidence in its Long-term Growth projects—most notably the Hermosa development in the United States.

Broker Sentiment: Macquarie Maintains Outperform Rating

Broker sentiment remains constructive on South32, with Macquarie Group reiterating its “Outperform” rating and setting a target price of AUD 4.50. This implies moderate upside from current levels, even after the stock’s strong run.

Macquarie’s optimism appears to be underpinned by South32’s exposure to future-facing commodities and its ability to advance large-scale projects in stable jurisdictions. The Hermosa project, in particular, is seen as a cornerstone asset that could significantly enhance the company’s production profile over the coming decades.

Hermosa Project Update: Expanding Scale and Strategic Importance

On 30 April, South32 released a comprehensive update on the Taylor zinc-lead-silver project, part of its Hermosa development in Arizona. The update underscores both the opportunities and challenges associated with large-scale Mining investments.

The Taylor project has been reaffirmed as a long-life, low-cost operation with significant production potential. The latest assessment indicates a 52% increase in Ore Reserves to 99 million tonnes and a 10% increase in Mineral Resources to 169 million tonnes. These upgrades reflect successful infill drilling and improved geological confidence.

The project’s initial operating life has been extended from approximately 28 years to around 33 years, with further potential extensions subject to regulatory approvals. This positions Hermosa as a multi-decade asset capable of delivering sustained output of zinc, lead, and silver.

Production Outlook and Operational Enhancements

South32 expects the Taylor project to achieve annual average steady-state production of 346 kilotonnes of zinc equivalent. Over its life, total production is estimated at 10.4 million tonnes of zinc equivalent, including significant volumes of zinc, lead, and silver.

Operational enhancements have also been identified through integration with the adjacent Clark deposit. The use of the Clark exploration decline is expected to improve access to the orebody and increase ore handling capacity by approximately 25%. This integrated approach could enable earlier production and higher throughput over time.

First ore from the Taylor project is now expected in mid-FY28, with initial production in the second half of FY28. Full production from shaft infrastructure is anticipated in FY29, with a gradual ramp-up to nameplate capacity by FY31.

Rising Capital Costs and Inflationary Pressures

While the project update highlights significant upside potential, it also reflects the impact of rising costs across the Mining sector. South32 has revised the growth Capital Expenditure for the Taylor project to approximately US$3.3 billion, an increase of around US$1.1 billion from the original estimate.

The cost escalation is attributed to several factors, including scope changes, higher construction costs, Inflation in key inputs such as steel and concrete, and the impact of US tariffs. Additionally, contractor underperformance has contributed to delays in shaft construction, necessitating revised timelines.

Operating unit costs have also been adjusted upward to around US$100 per tonne, reflecting broader inflationary trends and higher energy costs.

Despite these increases, the company maintains that the project is expected to deliver attractive returns, supported by its scale, resource quality, and long mine life.

Strategic Significance of Hermosa

The Hermosa project holds strategic importance not only for South32 but also for the broader critical minerals Supply chain. Located in Arizona, the project has been recognized under the US government’s FAST-41 permitting process, highlighting its potential to strengthen domestic Supply of key metals.

In addition to the Taylor deposit, Hermosa includes the Peake copper deposit and the Clark manganese deposit, offering further growth opportunities. The development of shared infrastructure is expected to unlock additional value across these Assets, enhancing the overall Economics of the project.

The presence of multiple deposits within a single տարածաշրջ provides South32 with optionality to expand production and diversify its Commodity mix over time.

Conclusion

South32’s share price performance over the past year reflects a combination of favorable market conditions and growing confidence in its development pipeline. The Hermosa project update underscores both the opportunities and complexities of large-scale Mining investments, with increased reserves and extended mine life balanced by higher Capital costs and revised timelines. Broker sentiment remains supportive, with Macquarie maintaining an optimistic outlook. As the company progresses toward production at Hermosa, its ability to manage costs and execute on development milestones will remain central to sustaining investor confidence and long-term value creation.