What Groupe Leonhart does

Groupe Leonhart is a privately held, vertically integrated French construction materials group headquartered in Sélestat, Alsace. Founded in 1920 as Sablières J. Leonhart, the group operates across aggregate extraction, ready-mix concrete production, asphalt manufacturing, concrete products (including prefabricated walls, slabs, and insulating formwork blocks under the SEPA, Spurgin Leonhart, Isolabloc, and Isopré brands), and natural stone distribution for outdoor landscaping (SEPA CUBIK). Operating infrastructure spans 13 sites in Alsace — 4 extraction quarries, 4 concrete batching plants, 4 concrete product factories, and 6 recycling platforms — supplemented by river-barge transport on the Rhine and a fleet of trucks operated by Transports Leonhart. The group is a Société Anonyme (SA) whose shares are not listed.

The business model combines B2B direct delivery to construction and public works contractors (Bouygues TP, SNCF, VNF, Bas-Rhin Department) with B2B2C distribution to landscaping professionals and a B2C self-service concrete channel (Selfbéton) for small-volume consumers. Revenue is generated across seven streams: aggregates sales, ready-mix concrete, concrete products, asphalt (Est Enrobés), transportation services, recycling services (Save Sand), and natural stone products (CUBIK). Pricing is quote-based for B2B projects and per-unit/automated for Selfbéton, with no publicly disclosed price list.

The technology stack centers on industrial process engineering rather than digital platforms: a Kleemann MC 110 primary jaw crusher (Tier V, 320 t/h capacity), electric conveyor feeding systems at Hoefflen, Teka planetary mixers, and proprietary Save Sand washing technology developed with M-S that produces certified recycled aggregates and reduces fresh water intake from 200 m³/hour to 10 m³/hour. The group holds CE marking across product lines, UNICEM Charte Environnement compliance for four quarries, Cap Environnement, Objectif CO2 transport charter, and CNIL/GDPR data compliance. No AI/ML, APIs, or developer-facing platforms are present; the website and Docuthèque serve as the primary digital interfaces.

Name

Groupe Leonhart

Legal name

GROUPE LEONHART

Website

https://leonhart.fr

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

101–250 employees

Short description

Groupe Leonhart is a 1920-founded, privately held French group that extracts aggregates and manufactures ready-mix concrete, asphalt, concrete products, and natural stone for construction companies, public works contractors, municipalities, landscaping professionals, and individual consumers across Alsace.

Ownership category

akta.pro rank

Product category

Construction Aggregates and Materials

NAICS

Construction Sand and Gravel Mining (212321), Crushed and Broken Granite Mining and Quarrying (212313), Cement and Concrete Product Manufacturing (3273), Asphalt Paving, Roofing, and Saturated Materials Manufacturing (32412)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400), Asphalt Paving & Roofing Materials (2950), Concrete, Gypsum & Plaster Products (3270)

akta.pro primary industry

Crushed Stone Quarrying & Processing (IMAKAHAA)

akta.pro secondary industries

Aggregate Processing & Value-Added Products (Washing, Screening, Asphalt/Concrete Aggregates) (IMAKAHAH), Asphalt Aggregates & Specialty Aggregates (Rail Ballast, Riprap, Lightweight) (IMADAAAJ), Aggregates & Dimension Stone Trading (Sand & Gravel, Crushed Stone, Limestone, Granite, Marble) (IMAKAJAG)

Keywords

• Construction aggregates
• Ready-mix concrete
• Natural stone supply
• Recycled construction materials
• Asphalt production

Headquarters

HQ city

Sélestat

HQ country

France

HQ region

Europe

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Aggregates Sales: Extraction and sale of natural sands, gravels, and crushed stone from four extraction sites. Includes granulats naturels and recyclés products.
2. Ready-Mix Concrete: Production and delivery of ready-mix concrete (béton prêt à l'emploi) from multiple concrete plants including new electric-powered central at Hoefflen.
3. Concrete Products: Manufacturing of concrete products including paving stones, blocks, prefabricated walls (prémurs, prédalles), insulating blocks (Isolabloc, Isopré), and outdoor landscaping products.
4. Asphalt/Enrobés: Production and delivery of asphalt products from Est Enrobés subsidiary with new plant opened in Sélestat.
5. Transportation Services: Road and fluvial transport of materials including barge transport via Rhine with equipped barge carrying 300 HP engine, moving 2000-3000 tonnes of goods monthly.
6. Recycling Services: Recycling of construction and demolition waste into new aggregates through Save Sand platform at Rixheim and six recycling platforms across Alsace.
7. Natural Stone Products: Sale of natural stones including granite, slate, sandstone, porphyry through CUBIK brand for outdoor landscaping.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

Groupe Leonhart extracts and processes natural aggregates (sand, gravel, crushed stone), manufactures ready-mix concrete, asphalt, and a range of concrete products (pavers, stackable blocks, prefabricated walls and slabs, insulating formwork blocks) under subsidiaries SEPA, Spurgin Leonhart, and Est Enrobés. The group also sells natural stone products for outdoor landscaping through the CUBIK brand, offers washed recycled aggregates via the Save Sand platform, runs Selfbéton self-service concrete stations, and provides road and river transport services through Transports Leonhart.

Product overview

Groupe Leonhart operates as a multi-brand construction materials group with a vertically integrated portfolio centered on aggregates, concrete, asphalt, and outdoor landscaping. The core offerings include natural and washed recycled aggregates (Granulats), ready-mix concrete (Béton prêt à l'emploi), and asphalt (Enrobés). The group distributes concrete through conventional delivery as well as self-service plants under the Selfbéton brand. Concrete products include prefabricated walls (Prémurs/Prédalles via Spurgin Leonhart), stackable concrete blocks, and innovative insulating formwork blocks (Isolabloc) and precast walls (Isopré) via SEPA. Outdoor landscaping products encompass pavers, natural stones, and gabions through SEPA and CUBIK brands, with the largest decorative aggregate barge terminal in the Grand Est region. Transport is provided via road fleet and river barges on the Rhine. Operations span multiple quarry sites, recycling platforms, and batching plants across Alsace, with the Hoefflen and Saint Pierre Bois sites serving as major production facilities. The group is completing a major modernization cycle (2023-2025) including new concrete and asphalt plants and the Save Sand washed recycled aggregates platform.

Differentiator

Problem solved

Functional benefit

Brands

• Selfbéton: Self-service concrete plant allowing customers to produce concrete on-demand 6 days a week
• Save Sand
• Isolabloc
• Isopré
• SEPA CUBIK

Products and services

• Natural Aggregates (Granulats)

Quantifiable outcome

• Removes approximately 4,000 trucks per year from roads through river transport
• +4 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered minor and core.

• GFTKminorChannel Partner/ Reseller/ Distributor · 5 May 2026Partnership for jointing products for paving stones, concrete slabs, and natural stone products. SEPA distributing GFTK products complementing their own range.
• M-S (Société M-S)coreStrategic or Co-development Partner · 4 August 2025Partnership with M-S for Save Sand recycling technology at Rixheim platform. M-S developed the washing process that produces clean, consistent recycled aggregates meeting current standards from construction demolition waste. Groupe Leonhart and M-S collaborate with Agence de l'Eau Rhin Meuse and Région Grand Est on this circular economy initiative.
• MediacominorStrategic or Co-development Partner · 9 December 2024Partner for new electric concrete plant assembly at Hoefflen. Equipment supplier involved in modernizing production site.
• MG LILIENFELDminorStrategic or Co-development Partner · 9 December 2024Partner for new electric concrete plant assembly at Hoefflen site modernization project.
• SIS 68 (Service d'Incendie et de Secours du Haut-Rhin)minorStrategic or Co-development Partner · 31 May 2022Partnership agreement to make Réguisheim quarry terrain available for firefighter training exercises. Real-terrain training opportunities on pre-prepared rugged terrain.
• SappeminorChannel Partner/ Reseller/ Distributor · 10 March 2020Transportation company handling sediment transport by barge from Rhône-au-Rhin canal dredging project. Performed transport of 2,553 tonnes of sediments via river to Strasbourg transit facility.
• LPO (Ligue pour la Protection des Oiseaux)coreStrategic or Co-development PartnerLong-standing biodiversity partnership for species protection at extraction sites. Collaboration includes installation of nesting boxes for Eagle Owl and Peregrine Falcon at Saint Pierre Bois quarry. LPO confirmed birth of two Eagle Owl chicks on site. Partnership part of company environmental commitment since 2016.
• TekacoreTechnology or IntegrationConcrete mixer manufacturer providing TPZ 2250K planetary mixer (1.5 m³) for SEPA Rixheim concrete plant upgrade, increasing capacity by 40%. Installation performed by Teka teams.
• Agence de l'Eau Rhin MeuseminorStrategic or Co-development PartnerWater agency partner in Save Sand circular economy project supporting water management and recycling initiatives.
• Ville de RixheimminorStrategic or Co-development PartnerLocal municipality partner in Save Sand project hosting the recycled aggregates platform.

Scale indicators15 records

Recent moves12 records

Expansion highlights5 records

Direct peers

• Eqiom: Eqiom produces cement, aggregates, ready-mix concrete, and related construction solutions in France. It directly overlaps with Groupe Leonhart's aggregates, concrete, recycling, and site-delivery activities, with Heidelberg Materials providing broader group scale.
• Pigeon Groupe: Pigeon Groupe is a French regional group active in aggregates, ready-mix concrete, public works, and related services. Its mix of upstream materials production and downstream construction activity is closely comparable to Groupe Leonhart's vertically integrated regional model.
• Colas: Colas operates extensively in road construction, asphalt production, aggregates, and construction-material recycling. It competes with Groupe Leonhart for regional road-building activity and overlaps across asphalt, aggregate supply, and lower-impact materials logistics.
• Vicat: Vicat is a French building-materials group operating across cement, aggregates, ready-mix concrete, and related products. Its vertically integrated product set and French operating footprint make it a close comparison to Groupe Leonhart, although Vicat is substantially larger and more geographically diversified.

Broad incumbents

• Cemex: Cemex is a global supplier of cement, ready-mix concrete, aggregates, asphalt, and construction solutions. Its French materials operations make it a broad incumbent comparator for Groupe Leonhart, with far greater scale and geographic diversification.
• Holcim: Holcim is a global construction-materials company with cement, aggregates, ready-mix concrete, asphalt, and circular-building offerings. Its French activities overlap directly with Groupe Leonhart, but Holcim operates at a much larger scale and across a far broader portfolio and geography.
• Heidelberg Materials: Heidelberg Materials produces aggregates, cement, ready-mix concrete, asphalt, and recycled construction materials globally, including through Eqiom in France. The product overlap is high, but Heidelberg Materials has substantially greater scale, market coverage, and financial resources.
• CRH: CRH is a diversified building-materials group with global exposure to aggregates, asphalt, ready-mix concrete, and construction products. It overlaps with Groupe Leonhart's core materials categories, although CRH is much larger and less concentrated in a single French region.
• Eiffage: Eiffage is a major French construction and civil-engineering group with exposure to road works, infrastructure, materials, and recycling. It is a broad incumbent comparator because it participates in the same regional public-works value chain and can source or produce related construction materials.

Regional players

• Tarmac: Tarmac operates across aggregates, asphalt, ready-mix concrete, cement, and construction services, primarily in the United Kingdom. Its materials portfolio is closely comparable, but its principal geography differs from Groupe Leonhart's Alsace-centered footprint.

Market position

Strengths5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/groupe-leonhart
• Facebookfacebook.com/leonhart.sables.granulats.concasses.beton.alsace

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries7 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Groupe Leonhart