ALKERN
ALKERN is a French manufacturer of prefabricated concrete products — blocks, floor systems, pavers, drainage, and public-works elements — serving building professionals, public-works contractors, and DIY consumers across France and Belgium through 50+ production sites and 3,000 distributors; wholly-owned by Holcim since January 2026.
- Company typePrivate
- Founded1972
- HeadquartersHarnes, France
- Headcount501–1,000
- GTM typeB2B and B2C
- OfferingHardware or Manufacturing
What ALKERN does
ALKERN is a French manufacturer of prefabricated concrete products serving the building, exterior-development, and public-works markets across France and Belgium. Founded in 1972 at Harnes and rebranded under the Alkern name in 2010 after passing through Tarmac and Anglo American ownership, the company operates more than 50 production sites with a catalogue of over 7,000 product references spanning concrete blocks, prestressed floor systems, thermal-break planelles (ISOPLANEL range), pavers, drainage solutions, sanitation elements, and urban furniture. It also markets the Re-Source® line of products made from recycled aggregates and industrial co-products, and a consumer-facing exterior-decoration sub-brand called Nexteria.
The company makes money through one-time sales of physical precast concrete units, distributed via a network of approximately 3,000 distributors and artisan partners (including Gedimat, Point P, and VM), direct relationships with construction companies managed by technical-commercial representatives, and shelf placement in the three major French DIY chains under the Nexteria brand. Go-to-market is dual-channel: B2B for building professionals and public-works contractors, and B2C via retail for individual consumers undertaking exterior home-improvement projects. Pricing is project-quoted based on product type, volume, and delivery location; no consumer-facing list prices are published.
Since January 6, 2026, Alkern has been a wholly-owned subsidiary of Holcim Ltd, operating within Holcim France alongside Lafarge France and PRB. Estimated 2025 net sales are approximately €250 million with 1,000–1,200 employees. The acquisition is expected to deliver €11 million of run-rate EBITDA synergies by year three and aligns with Holcim's NextGen Growth 2030 target of scaling its Building Solutions segment to 50% of group net sales. The French competition authority unconditionally cleared the deal.
ALKERN firmographics
Firmographics- Name
- ALKERN
- Legal name
- Alkern Groupe SAS
- Website
- https://alkern.fr
- Company type
- Private
- Founded year
- 1972
- Operating status
- Acquired
- Headcount range
- 501–1,000 employees
- Short description
- ALKERN is a French manufacturer of prefabricated concrete products — blocks, floor systems, pavers, drainage, and public-works elements — serving building professionals, public-works contractors, and DIY consumers across France and Belgium through 50+ production sites and 3,000 distributors; wholly-owned by Holcim since January 2026.
- Ownership category
- akta.pro rank
ALKERN industry classification
Industry- Product category
- Precast Concrete Products
- NAICS
- Other Concrete Product Manufacturing (32739), Other Concrete Product Manufacturing (327390), Cement and Concrete Product Manufacturing (3273)
- SIC
- Concrete Products, Except Block & Brick (3272), Concrete, Gypsum & Plaster Products (3270)
- akta.pro primary industry
- Cement Manufacturing (Portland, Blended & Specialty) (IMADAAAG)
Keywords
Where ALKERN is headquartered
LocationHeadquarters
- HQ city
- Harnes
- HQ country
- France
- HQ region
- Europe
Offices2 records
Markets served
ALKERN business model
Business model- GTM type
- B2B and B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Infrastructure, Technology or R&D, Marketing or Sales
Revenue model
- Precast concrete products: Alkern generates revenue through the manufacture and sale of precast concrete products including blocks, pavers, tiles, drainage systems, and infrastructure elements. Sales are made through distributors, retailers, and directly to construction companies and public works contractors.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Products sold via distributor network with project-specific pricing |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels5 records
ALKERN product offering
Product offeringCore offering
ALKERN manufactures and sells prefabricated concrete elements across three divisions: Building (concrete blocks, floor systems, thermal break planelles), Exterior Development (pavers, tiles, pool copings, draining solutions), and Public Works (sanitation systems, road infrastructure, urban furniture). The company operates over 50 production sites in France and Belgium, distributing through a network of 3,000 distributors plus DIY retailers (Leroy Merlin, Castorama, Mr Bricolage) under the Nexteria consumer brand.
Product overview
ALKERN is a major manufacturer of precast concrete products with over 7,000 product references across three main divisions: Building (walls, floors, accessories), Exterior Development (pavers, tiles, urban furniture), and Public Works (sanitation, road infrastructure, drainage). The portfolio includes core products like concrete blocks (CONFORT, KOSMO, CLIMAT, NATUR R1 with biosourced materials), thermal break planelles (ISOPLANEL, ISOPLANEL I, ISOPLANEL S, ISOPLANEL SI, RUPTHERM), complete floor systems, paving and drainage solutions, and urban infrastructure elements. The company operates over 50 production sites in France and Belgium and offers the Re-Source line made from recycled materials. Since January 2026, ALKERN is a member of the Holcim Group.
Differentiator
Problem solved
Functional benefit
Brands
- Nexteria: Alkern's sub-brand dedicated to the general public (DIY/retail), offering pressed concrete products inspired by natural materials for exterior decoration, distributed through specialist retailers such as Leroy Merlin, Castorama, and Mr Bricolage.
Products and services
- Building Concrete Blocks (Blocs béton) Traditional and insulating concrete blocks for wall construction including hollow, solid, perforated, glue-applied, and insulated blocks for residential and commercial building professionals.
- Floor Systems (Planchers) Complete floor systems including prestressed beams, lattice beams, hollow blocks, polystyrene and concrete infill elements, beams, and thermal break planelles for building construction.
- ISOPLANEL S Thermal Break Planelle Thermal break planelle in standard concrete with polyurethane insulation for treating thermal bridges at floor-wall junctions in seismic zones. Performance: psi values 0.21-0.68 W/(m.K), Rth 0.88 m².K/W.
- ISOPLANEL I Thermal Break Planelle Thermal break planelle in standard concrete for treating thermal bridges at floor-wall junctions. R value 0.5 m².K/W, psi values 0.23-0.66 W/(m.K).
- ISOPLANEL Thermal Break Planelle Thermal break planelle in lightweight aggregate concrete with volcanic rock insulation and polyurethane correction. R value 1 m².K/W, psi values 0.19-0.62 W/(m.K).
- Pavers and Drainage Range Exterior paving products including aged and non-aged pavers (BAROCO VIEILLI, NEWHEDGE, SIGNATURE, OCÉAN, ARCADE), and permeable/draining solutions (PAVÉ AQUAFIL, PAVÉ HYDROJOINT, DALLE BETOGREEN) for landscaping and urban development.
- Tiles and Pool Copings (Dalles et Margelles) Garden tiles and pool copings in various finishes including INFINITO, NOVASCHISTE, GHISA, VOLCANIK, CALCARA, TOSCANE, and kit systems for pool installations.
- Public Works Products (Travaux Publics) Infrastructure products including sanitation systems (pipes, manholes, stormwater management), road elements (curbs, channels, pavers), drainage solutions, and urban furniture for public works projects.
- Sanitation Systems (Assainissement) Precast concrete sanitation products including pipes, connection fittings, manholes, special structures, retention tanks, and stormwater management solutions (HYDROCYL).
- Road Infrastructure (Voirie) Road construction elements including curbs (VÉLUB for bike lanes, ACCESTRAM for tram, ACCESBUS for bus), channels, PROFIL PIERRE style curbs, and PARABLOC pavers.
- Urban Furniture (Mobilier Urbain)
Quantifiable outcome
- Top 2% in Ecovadis ESG ratings with score of 79/100 in 2024
- +2 more outcomes
Companies that use ALKERN
Customer profileNamed customers5 records
Segments5 records
Ideal customer profiles4 records
ALKERN technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
ALKERN partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core and minor.
- EcominérocoreAlkern is a founding member of Ecominéro, the eco-organization for the Extended Producer Responsibility for Construction Products and Materials (REP PMCB). Alkern actively participates in decisions to deploy large-scale recycling and reuse of building materials.
- GranudemminorPartner for recycled aggregates from deconstruction used in the Re-Source® product line, enabling circular economy solutions
- CERIB (Centre d'Etudes et de Recherches de l'Industrie du Béton)coreTechnical center managing NF certification for concrete products. CERIB conducts audits and issues certifications. Alkern has developed training programs in partnership with CERIB for production operators.
- FIB (Fédération de l'Industrie du Béton)coreAlkern is a member of FIB, which groups over 400 concrete prefabrication industrials. FIB associated with CERIB promotes prefabricated concrete solutions under the 'Le bon calcul' slogan.
- Leroy Merlin, Castorama, Mr BricolagecoreMajor DIY retailers distributing Nexteria branded consumer products for exterior decoration. These partnerships enable Alkern to reach individual consumers through established retail channels.
Scale indicators10 records
Recent moves9 records
Expansion highlights5 records
ALKERN competitors and assessment
Company assessmentBroad incumbents
- Holcim Ltd: Swiss-listed global building materials leader and parent company of ALKERN since January 2026. Now co-owns Lafarge France, PRB, and ALKERN in France; the corporate parent sets group strategy, with Lafarge France providing overlapping concrete and cement operations.
- CRH plc: Global building materials group operating in cement, aggregates, and concrete products across Europe and North America. Broad incumbent with overlapping concrete products operations in Europe; comparable scale and end-market exposure.
- Saint-Gobain: French-headquartered global building materials leader with extensive operations in construction products, insulation, and distribution. Broad incumbent with overlapping customer base of French contractors and a major distribution platform (POINT.P) that competes with ALKERN's distributor network.
- CEMEX: Mexican-headquartered global building materials company with extensive ready-mix concrete, cement, and aggregates operations in Europe. Broad incumbent offering overlapping products and competing for similar infrastructure and construction customers.
- Heidelberg Materials: German-headquartered global building materials company with strong cement, aggregates, and ready-mix concrete operations in Europe. Broad incumbent with adjacent precast and concrete product activities in France and broader Western Europe.
Direct peers
- Seac (Groupe Seac): French manufacturer of prefabricated concrete elements including floors, walls, and structural components. Direct competitor in the French precast concrete market, serving similar building professionals and developers with comparable product offerings.
- Wienerberger: Austrian-headquartered manufacturer of building products including clay blocks, facing bricks, and concrete pavers across Europe. Direct peer to ALKERN in concrete masonry and exterior paving, with overlapping customer base of building professionals and distributors in Western Europe.
- Béton Direct (Rector): French manufacturer of prefabricated concrete floor systems, beams, and structural components under the Rector brand. Direct competitor in the French precast concrete building elements market with similar distribution through building material suppliers.
- KP1: French specialist in precast concrete systems including floor systems, beams, and structural components. Direct competitor to ALKERN in the French prefabricated building elements market with similar product portfolio and customer base of contractors and developers.
Regional players
- Boral Limited: Australia-headquartered building products and construction materials group with concrete and masonry operations. Comparable product portfolio and business model but operates in Asia-Pacific rather than Europe; relevant for cross-regional product and sustainability benchmarking.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
ALKERN social profiles
Digital presenceALKERN compliance and trust
Trust signalCompliance5 records
ALKERN financial estimates
Financial estimateRevenue estimate
Valuation estimate
ALKERN leadership team
Management profileNumber of profiles
Profiles2 records
ALKERN subsidiaries and ownership
Company hierarchySubsidiaries8 records
ALKERN funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
ALKERN M&A and investment
M&A and investmentM&A4 records
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about ALKERN
What does ALKERN do?
ALKERN manufactures and sells prefabricated concrete elements across three divisions: Building (concrete blocks, floor systems, thermal break planelles), Exterior Development (pavers, tiles, pool copings, draining solutions), and Public Works (sanitation systems, road infrastructure, urban furniture). The company operates over 50 production sites in France and Belgium, distributing through a network of 3,000 distributors plus DIY retailers (Leroy Merlin, Castorama, Mr Bricolage) under the Nexteria consumer brand.
Is ALKERN a public or private company?
ALKERN is a private company. It is classified as corporate owned and is currently acquired.
When was ALKERN founded?
ALKERN was founded in 1972. It employs 501 to 1,000 people.
Where is ALKERN based?
ALKERN is headquartered in Harnes, France, in the Europe region.
How does ALKERN make money?
One revenue line is on record: precast concrete products.
Who are ALKERN's main competitors?
Broad incumbents on record are Holcim Ltd, CRH plc, Saint-Gobain, CEMEX and Heidelberg Materials. Direct peers are Seac (Groupe Seac), Wienerberger, Béton Direct (Rector) and KP1. Boral Limited is listed as a regional player.
Does ALKERN have an API?
No public API is recorded for ALKERN.
What industry is ALKERN in?
ALKERN's product category is Precast Concrete Products. Its primary akta.pro industry code is IMADAAAG, Cement Manufacturing (Portland, Blended & Specialty). Its NAICS code is 32739 and its SIC code is 3272.