SigmaRoc

What SigmaRoc does

SigmaRoc plc is a UK-domiciled, AIM-listed European lime and limestone group that invests in and operates quarried materials businesses. Founded in 2016, the company has grown primarily through acquisitions to operate 110 sites across 14 countries, holding 2.7 billion tonnes of mineral reserves (equivalent to a 114-year reserve life). Its portfolio includes burnt products such as quicklime (calcium oxide), slaked lime, milk of lime, mortar, and precipitated calcium carbonate, as well as unburnt products including aggregates, limestone, limestone powder, granulated products, and wollastonite. The company also operates a ventures arm, SkreenHouse, focused on decarbonisation technologies such as electric calcination.

The business serves a diversified set of B2B industrial end-markets including steel (the primary use case, including iron ore agglomeration, desulfurisation, and steelmaking), water treatment, pulp and paper, building materials, non-ferrous metallurgical processing (notably lithium extraction), and food and agriculture. Its proprietary technology efforts centre on decarbonisation: an Aqualung modular carbon capture platform capable of capturing over 30,000 tonnes of CO2 per container, kiln fuel-switching capabilities for biofuel use, and re-carbonation processes that can reabsorb up to 43% of process emissions depending on application.

SigmaRoc generates revenue through long-term industrial supply contracts with major customers in steel, chemicals, construction, and environmental sectors. The company highlights that lime typically represents less than 3% of a customer's total procurement cost and that approximately 90% of lime revenue is derived from customers with relationships exceeding 10 years, indicating high customer stickiness. Distribution is conducted through regional operating companies managing direct B2B relationships, and the group is organised around four tactical pillars: Invest, Improve & Integrate, Involve, and Innovate. Pricing is contract-based and not publicly disclosed. The largest recent transaction was the ~£1 billion acquisition of CRH's UK and European lime operations in 2023, which was the principal driver of FY25 revenue exceeding €1 billion and EBITDA of €262 million.

Name

SigmaRoc

Legal name

SigmaRoc plc

Website

https://sigmaroc.com

Company type

Public

Founded year

2016

Operating status

Operating

Headcount range

251–500 employees

Short description

SigmaRoc plc is a UK-listed European lime and limestone group operating 110 sites across 14 countries with 2.7 billion tonnes of reserves. It supplies quicklime, aggregates, and related products to industrial customers in steel, water treatment, construction, and mining.

Ownership category

akta.pro rank

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Infrastructure, Technology or R&D, Personnel

Revenue model

1. Lime and Limestone Products: Production and sale of lime and limestone products including quicklime, slaked lime, milk of lime, mortar, aggregates, limestone powder, and precipitated calcium carbonate. Revenue is generated through long-term supply contracts with industrial customers across steel, chemical, construction, and environmental sectors.
2. Construction Aggregates: Supply of construction aggregates and premium building stones from quarries. The company operates 8 quarries (at time of Johnston Quarry Group acquisition) producing construction materials for infrastructure and building projects.
3. CRH Lime Operations Acquisition: SigmaRoc completed a £1 billion acquisition of CRH's UK and European lime operations, significantly expanding production capacity and market presence in the lime and minerals sector.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

SigmaRoc is a European lime and limestone group that quarries, processes, and sells industrial minerals including quicklime, slaked lime, milk of lime, mortar, precipitated calcium carbonate, aggregates, limestone, limestone powder, and wollastonite. The company operates 110 sites across 14 countries with 2.7 billion tonnes of reserves (114-year reserve life) and supplies steel, chemical, construction, water treatment, agriculture, and mining end-markets via long-term industrial contracts.

Product overview

SigmaRoc is a European lime and limestone group operating across 14 countries with 110 sites and 114-year reserve life (2.7 billion tonnes). The company operates as a platform of businesses focused on quarried materials assets, organized around four tactical pillars: Invest, Improve & Integrate, Involve, and Innovate. The product portfolio is divided into two main categories: Unburnt Products (Aggregates, Granulated Products, Limestone, Limestone Powder, Wollastonite) and Burnt Products (Quicklime/Calcium Oxide, Slaked Lime/Calcium Hydroxide, Milk of Lime, Mortar, Precipitated Calcium Carbonate). These products serve diverse end markets including Steel, Pulp & Paper, Chemicals, Mining, Construction, Environment, Water Treatment, Food & Agriculture, Glass, Infrastructure, and Non-Ferrous Metallurgical Processing. The products are marketed primarily through the Lime for Life brand, which positions the company as a sustainable minerals provider for industrial and construction applications.

Differentiator

Problem solved

Functional benefit

Brands

• Lime for Life: A platform showcasing lime and limestone products, their applications in daily life, sustainability, and operations across Europe.
• SkreenHouse

Products and services

• Aggregates Construction aggregates produced from quarried limestone and related materials for building and infrastructure applications.
• Granulated Products Granulated lime products for industrial and agricultural applications.
• Limestone Raw limestone used in cement production, steelmaking, and construction processes.
• Limestone Powder Finely ground limestone powder used as a filler and pH adjuster in industrial applications.
• Wollastonite Calcium silicate mineral used as a functional filler in industrial applications.
• Slaked Lime (Calcium Hydroxide) Calcium hydroxide (Ca(OH)2) produced by adding water to quicklime, used in whitewashing, soil amendment, water treatment, and construction applications.
• Quicklime (Calcium Oxide) Calcium oxide (CaO) or burnt lime produced by heating limestone in a kiln above 900°C, used in steelmaking, water treatment, construction, and industrial processes.
• Precipitated Calcium Carbonate (PCC) Synthetic calcium carbonate produced by chemical precipitation, used as a filler and coating material in plastics, paper, paints, coatings, and pharmaceuticals.
• Mortar Lime-based mortar used in masonry work to bind bricks, stones, and building blocks, providing cohesion, workability, and durability.
• Milk of Lime Suspension of slaked lime Ca(OH)2 in water, used in whitewashing, water treatment, and industrial applications.

Quantifiable outcome

• Over €1 billion revenue in FY25
• +3 more outcomes

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core and minor.

• LithermcoreStrategic or Co-development Partner · 3 September 2025SkreenHouse (SigmaRoc's venture arm) invested in Litherm, an electric calcination pioneer. This partnership supports decarbonisation of lime production through innovative electric calcination technology, representing strategic investment in next-generation production methods.
• AdaptavateminorStrategic or Co-development Partner · 25 April 2025Partnership announced April 2025 for development of sustainable building materials solutions. Adaptavate focuses on low-carbon construction products, and the partnership likely involves integration of lime-based products into sustainable building applications.
• Aqualung Technology PartnerscoreTechnology or IntegrationPartnership for Aqualung modular carbon capture technology enabling capture of over 30,000 tonnes CO2 per container. The technology allows scalable and flexible CCUS deployment across lime production facilities.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Regional players

• Martin Marietta Materials: US-listed aggregates and heavy building materials producer with growing lime operations. Comparable in aggregates and lime product mix and industrial customer base, but operates almost exclusively in North America rather than Europe.
• Vulcan Materials Company: Largest US producer of construction aggregates, with growing exposure to lime and cement. Comparable in aggregates-heavy business model and infrastructure-driven end markets, but focused exclusively on the US rather than Europe.

Direct peers

• Carmeuse: Private Belgian multinational producing lime, limestone, and related mineral products for steel, environmental, and construction applications. Directly comparable to SigmaRoc in product mix, geographic focus on Europe and North America, and end-market diversification across industrial uses.
• Lhoist Group: Belgian-headquartered, family-owned global lime and dolomite producer with quarries and kilns across Europe, the Americas, and Asia. Closest direct peer to SigmaRoc: same product portfolio (quicklime, slaked lime, limestone), same end markets (steel, construction, water, environment), and same regulatory/permit-driven moat structure.
• Breedon Group: UK-listed aggregates and construction materials group with operations across Britain and Ireland, where SigmaRoc board member Tim Hall was formerly CEO of Breedon South. Directly comparable in aggregates production, UK end markets, and customer overlap with construction and infrastructure buyers.

Broad incumbents

• Holcim Ltd: Swiss global building materials giant formed from the Lafarge/Holcim merger (in which SigmaRoc CEO Max Vermorken played a strategic advisory role). Comparable in cement, aggregates, and lime offerings; competes in many of the same European markets but at substantially larger scale.
• CRH plc: Irish-headquartered global building materials leader and the seller of the lime operations SigmaRoc acquired for £1B in 2023. Overlaps with SigmaRoc across aggregates, cement, and lime, but operates at much larger scale and across a broader product portfolio and global geographies.
• Heidelberg Materials: German global building materials group producing cement, aggregates, ready-mixed concrete, and lime. Comparable to SigmaRoc in aggregates/quarrying operations and European geographic exposure, but with a significantly broader product portfolio and global scale.
• Tarmac (CRH UK): UK's largest aggregates and construction solutions business, now part of CRH. Competes with SigmaRoc's aggregates and building materials operations across the UK, with a broader product portfolio including cement and asphalt that SigmaRoc does not produce.

Emerging players

• Imerys: French-listed global specialty minerals group producing industrial minerals including calcium carbonates, lime-based additives, and fillers. Comparable in industrial minerals mining, mineral processing capabilities, and European geographic focus, though with a more specialty/functional materials tilt versus SigmaRoc's bulk lime focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/15086091
• Instagraminstagram.com/sigmaroc
• Xx.com/sigmaroc_plc

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A4 records

Investments1 record

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SigmaRoc