Sigmaroc. Regulatory News (SRC)

03 March 2026

(EPIC: SRC / Market: AIM / Sector: Construction Materials)

SIGMAROC PLC

('SigmaRoc', the 'Group' or the 'Company')

SkreenHouse Invests in Electric Calcination Pioneer Litherm

SkreenHouse Ventures Ltd, the innovation and investment platform of SigmaRoc, has invested ~ ?1m in the ?6.5 million seed financing round of Litherm Technologies GmbH ("Litherm"). Litherm is developing fully electric calcination technology that enables lime and cement to be produced without CO2-emissions.

The investment supports the development of practical solutions aimed at decarbonising the lime and construction materials industry. Technologies such as fully electric calcination, combined with built-in CO2 capture, could significantly reduce the unavoidable process emissions in lime production while remaining commercially viable.

The funding builds on existing cooperation between Litherm and industry partners, including SigmaRoc's German entity Fels-Werke, which is providing a site and material supply for the construction and operation of a pilot plant to evaluate the technology under real-world conditions.

Ludovic Emsens, Manager at SkreenHouse Ventures, commented:

"We support technologies that enable meaningful industrial decarbonisation while maintaining economic viability. Litherm's fully electric calcination process and integrated CO2 capture approach is an important step forward for the industry."

SigmaRoc continues to evaluate opportunities to support innovation across its core markets as part of its broader sustainability and value creation strategy.

Information on the Company is available on its website, www.sigmaroc.com.

For further information, please contact:

About SigmaRoc

SigmaRoc is a quoted European lime and minerals Group.

Lime and limestone are key resources in the transition to a more sustainable economy. New applications for lime and limestone products as part of a drive for sustainability include the production and recycling of lithium batteries, the decarbonisation of construction including through substitution of cementitious material and new building materials, and environmental applications including lake liming, air pollution and direct air capture.

SigmaRoc invests in and acquires businesses in the lime and minerals sector. The principal activity of the Group is the production of lime and minerals products. The Group's aim is to create value for shareholders through the successful execution of its strategy in the lime and minerals sector.

SigmaRoc seeks to create value by purchasing assets in fragmented markets and extracting efficiencies through active management and by forming the assets into larger groups. It seeks to de- risk its investments through the selection of projects with strong asset backing. The Group seeks to implement operational efficiencies that improve safety, enhance productivity, increase profitability and ultimately create value for Shareholders.

About SkreenHouse Ventures

SkreenHouse Ventures is the innovation and investment platform of SigmaRoc, dedicated to accelerating innovation, investment and collaboration within the construction and building materials industry. SkreenHouse Ventures focuses on backing innovative businesses working to transform the mineral and construction value chain through scalable, lower-carbon solutions. SigmaRoc Plc. has a strong industrial presence across Europe and operates an extensive network of production and industrial sites through its subsidiaries - including Fels-Werke GmbH and Nordkalk. Through SkreenHouse Ventures, portfolio companies gain access to more than 100 industrial test and reference sites along the mineral value chain.