• Karo Phase 1 targets 226,000 6E ounces annually, close to Unki and Mimosa
• Funding, recoveries and concentrate payability will determine Karo’s competitive economics after commissioning
• Five year offtake secures a route to market for Karo’s 226,000-ounce Phase 1 as funding and downstream economics become the next test

Harare- Karo Platinum’s five year concentrate purchase agreement with Valterra Platinum removes a major commercial uncertainty from a project that has moved through four years of construction, weaker PGM prices and financing delays, placing greater weight on whether its planned 226,000-ounce annual Phase 1 capacity can now be commissioned within the revised 2027 timetable and converted into cash on competitive processing terms.

The agreement secures a buyer before production begins and strengthens the project’s funding case, with realised economics ultimately governed by ramp up, recoveries, metal payability and concentrate purchase terms that have not been disclosed.

Karo is being developed across a 23,903 hectare mining lease on the Great Dyke, approximately 80 kilometres southwest of Harare. The project carries a current resource of 178.2 million tonnes containing 12 million ounces of PGMs and reserves of 24.8 million tonnes containing 2.3 million ounces. Phase 1 has been designed around an open pit operation and a concentrator processing approximately 2.6 million tonnes of ore annually, with steady state production targeted at about 226,000 6E ounces. Only a relatively small portion of the wider lease supports the initial development, leaving substantial mineral inventory available for subsequent expansion once the first operation establishes its production and cost base.

The binding agreement gives a Valterra subsidiary the right to purchase Karo’s PGM and base metal concentrate for an initial five years. It follows the Special Mining Lease signed with the Zimbabwean government on 24 August, which covers 23,903 hectares and establishes the fiscal and tenure framework governing the project.

Within the same week, Karo therefore addressed two issues that lenders would ordinarily require greater certainty over before committing long dated project capital, namely the fiscal framework under which the mine will operate and the commercial route through which its concentrate will be monetised.

The scale at which Karo plans to enter the market makes the agreement materially relevant to Zimbabwe’s existing PGM structure. Phase 1 is designed to process about 2.6 million tonnes of run of mine ore annually and produce approximately 226,000 ounces of 6E PGM concentrate at steady state.

That volume places Karo close to two established Great Dyke operations. Mimosa produced 239,100 6E ounces of concentrate in the year to June 2026, while Unki produced 219,700 PGM ounces in 2025. Zimplats remains considerably larger, producing 660,400 ounces of 6E concentrate in FY2026 and 606,300 ounces in matte. Karo therefore enters at a scale broadly comparable with Mimosa and Unki and around one third of Zimplats’ current concentrate production.

Phase 1 does not place Karo among Zimbabwe’s two largest PGM operations by production. Its planned 226,000 ounces position the mine alongside Unki and Mimosa, whose recent annual production has been around 240,000 ounces, while Zimplats operates at close to three times Karo’s initial planned scale. The competitive ranking changes under Karo’s longer term development case. Expansion into underground mining at the production levels previously modelled by Tharisa would move annual output materially above the current Unki and Mimosa range, giving Karo a path towards becoming Zimbabwe’s second largest PGM producer if the existing mines remain around present production levels. The distinction places greater importance on Phase 1 execution because the wider resource carries considerably more production potential than the first open pit development captures.

That comparison also exposes an important difference in the production models across the Great Dyke. Zimplats has built substantial downstream infrastructure around the Selous Metallurgical Complex, including expanded smelting capacity, and continues work on the refurbishment of its Base Metal Refinery. Unki combines its mine and concentrator with a local smelter. Mimosa operates a concentrator and historically transported concentrate to Impala facilities in South Africa, with part of its output now also toll smelted at Zimplats following the expansion of the Selous smelting complex. Karo’s current Phase 1 development centres on mining and concentration, leaving Valterra to provide the downstream route through the concentrate purchase arrangement.

The Valterra relationship therefore gives Karo access to an established processing network during the period when its own balance sheet remains concentrated on bringing the mine and concentrator into production. Valterra already processes material from its own mines and third parties and has been expanding third party concentrate purchases across its processing portfolio.

For Valterra, Karo adds feed without requiring ownership of the mine. For Karo, the arrangement reduces the capital and commissioning complexity that would accompany adding another major metallurgical project to the current construction programme. The economic trade off lies in the value surrendered through concentrate purchase terms and downstream processing, which cannot yet be quantified because pricing, treatment charges and metal payability were not disclosed.

Karo’s competitive position will consequently depend on more than the 226,000 ounce production target. Mimosa has already demonstrated the exposure created when grade, geology and electricity availability weaken simultaneously, with its FY2026 output declining by 6% to 239,100 ounces. Unki produced below its 2024 level in 2025 as lower grades and weaker recoveries reduced volumes. Zimplats has greater processing depth and substantially higher throughput, yet furnace maintenance has also created concentrate inventory and delayed conversion into matte. Karo will enter a market where orebody quality, recovery, electricity reliability and downstream availability determine how much installed capacity reaches saleable production.

Its open pit model gives the project a different operating profile from the underground systems at Mimosa, Unki and most of Zimplats. Tharisa has designed the first phase around a ten-year open pit operation before a potential transition to underground mining across a resource capable of supporting operations for more than 50 years.

Company development presentations have placed longer term underground production materially above Phase 1 levels, at roughly 360,000 to 400,000 6E ounces annually depending on the development case. The current five-year Valterra agreement therefore covers the critical commissioning and early operating period, representing about half of the planned initial open pit life and a much smaller portion of the wider resource life.

That timing gives Karo several years of operating evidence before the first commercial arrangement expires. Production consistency, recoveries, actual concentrate grades and realised payability will determine whether renewing with Valterra remains the strongest commercial option, whether competing processing routes become viable or whether greater downstream integration warrants additional capital.

Zimplats is already moving further along the beneficiation chain through its US$190 million Base Metal Refinery refurbishment, increasing the competitive importance of how much value each Great Dyke producer retains between concentrate production and final refined metal.

Funding now carries the most immediate execution threshold. Tharisa reported US$241 million invested in Karo by March 2026 and has continued spending on mine development and infrastructure, while its project presentations have repeatedly linked first ore in the mill to approximately 15 months after financial close. Open pit waste stripping was already under way by June and the mining contractor had been fully mobilised.

The 15 month construction relationship creates a clear timetable against which the 2027 target can be judged. A financial close moving materially beyond September 2026 would place first ore under increasing pressure to move into 2028 unless construction already funded by Tharisa compresses the remaining critical path.

The next meaningful Karo development is therefore the funding close and the amount of additional equity or debt required to reach commissioning, followed by evidence that the concentrator can move from nameplate design into sustained recoveries at the planned 2.6 million tonne annual throughput.

The Valterra agreement gives Karo a commercially credible entry point into Zimbabwe’s PGM industry at a scale large enough to stand beside Unki and Mimosa from the first phase. Its longer term competitive position will be established by the cost of producing those ounces, the share of contained metal value retained under the offtake structure and the capital path chosen once the initial five year arrangement approaches expiry. The buyer has been secured. Execution, funding and value capture now determine how much of Karo’s considerable geological scale becomes economic production.

Equity Axis News