SigmaRoc, announced it has entered into a 10-year ground-breaking strategic alliance with Duo Group to produce and sell sustainable limestone aggregates in the UK market. This 10-year agreement has the potential to generate incremental revenue of over £150 million over the course of the alliance, whilst significantly reducing SigmaRoc's environmental impact through the repurposing of limestone quarry waste. Under the terms of the agreement, Duo Group has agreed to establish processing plants at up to seven SigmaRoc limestone quarries to reprocess historically uneconomical quarry tip waste into a premium construction material.

The process therefore advances SigmaRoc's ambition of utilising 100% of the resource it quarries. Innovative Waste Processing: Quarry tips, also known as spoil tips, are accumulations of previously uneconomical processable material removed by the quarrying operations. By repurposing this previously overlooked resource, using processing equipment installed by Duo Group, the Strategic Alliance aims to extend the operational life of quarries, conserve natural resources, and align with sustainable development goals.

This initiative also supports SigmaRoc's ambition of utilising 100% of the resource it quarries, ensuring a more sustainable future for the construction and infrastructure sectors. Alliance Structure: Under the agreement, Duo Group will establish large scale reprocessing plants to cover material preparation and processing, load and haul, plant operation, and material dispatch. SigmaRoc will put at the disposal of the Strategic Alliance all unprocessed "tipped" materials which previously held no commercial value.