What Interstone does

Interstein AG is a Swiss-headquartered distributor of natural stone, raw materials, and construction materials serving public-sector infrastructure, landscape, sports-field, rail, water-engineering, and paving projects across Switzerland, Germany, Liechtenstein, Benelux, Austria, and Italy. Founded in 1987 and re-established under the Interstein brand in 2007 following a multi-decade roll-up of regional Swiss stone merchants, the company today operates roughly 35 employees across ten owned locations — including sales-and-warehouse sites in Münchwilen, Märstetten, and Boswil (CH), Kenzingen and Remseck (DE), three port-adjacent distribution warehouses (Pratteln CH, Weil am Rhein DE, Moerdijk NL), and two upstream quarries (Lodrino CH and Iselle di Trasquera IT). Its product portfolio spans more than 400 article types covering granite, limestone, quartzite, porphyry, basalt, and gneiss across bulk materials, paving, wall and floor stones, specialty substrates, seeds, and licensed Kasseler Sonderborde accessibility curbs, backed by a constant stock of over 100,000 tonnes.

The business model is sales-led and project-driven: dedicated field-sales professionals at each major site provide expert consulting across specialized product categories and process orders from procurement through logistics to delivery. Products are sold by weight (tonnes) on a one-time transactional basis, with no publicly disclosed pricing. Differentiation rests on Fair Stone certification for socially and environmentally responsible natural stone imports, a licensed-producer position for the Kasseler Sonderborde system used in transit-station accessibility infrastructure, and proprietary specialty systems (Stabilizer Deck Layers, HEK turf support layers) for sports-field construction. Customer references are heavily weighted toward Swiss municipal and federal public-sector buyers, with named projects including Zoo Zürich, Gemeinde Allschwil, Post CH AG, Stadt Basel, and Stadt Zürich.

Since January 1, 2024, Interstein has operated as an independent subsidiary of HG Commerciale (Genossenschaft HGC), a Swiss cooperative. The company is concurrently consolidating its legal structure: Franchetto AG and Frero AG were merged into HEK Stein AG in 2025, and on May 22, 2026 HEK Stein AG was renamed to Interstein AG, unifying the operating entity with the consumer brand. The company maintains no public listings, has not raised venture or private-equity capital, and reports no revenue publicly.

Name

Interstone

Legal name

Interstein AG

Website

https://www.interstein.com

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

11–50 employees

Short description

Interstein AG is a Swiss-headquartered distributor of natural stone, raw materials, and construction materials serving public-sector and contractor clients across six European countries via ten owned warehouse, production, and port locations.

Ownership category

akta.pro rank

Product category

Construction Materials Distribution

NAICS

Dimension Stone Mining and Quarrying (212311), Crushed and Broken Granite Mining and Quarrying (212313), Cut Stone and Stone Product Manufacturing (327991), Stone Mining and Quarrying (21231), Nonmetallic Mineral Mining and Quarrying (2123)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400), Cut Stone & Stone Products (3281)

akta.pro primary industry

Granite Quarrying & Dimension Stone Fabrication (IMAKAHAD)

akta.pro secondary industries

Other Dimension Stone (Slate, Sandstone, Quartzite, Travertine) Quarrying & Fabrication (IMAKAHAF), Marble Quarrying & Dimension Stone Fabrication (IMAKAHAE), Limestone Quarrying (Industrial & Construction Grade) (IMAKAHAC), Aggregate Processing & Value-Added Products (Washing, Screening, Asphalt/Concrete Aggregates) (IMAKAHAH), Specialty Aggregates (Rail Ballast, Riprap/Armor Stone, Gabion Stone) (IMAKAHAJ)

Keywords

• Natural stone distribution
• Construction materials supply
• Paving stone products
• Railway ballast supply
• Quarrying and stone processing

Headquarters

HQ city

Münchwilen

HQ country

Switzerland

HQ region

Europe

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Natural Stone and Construction Material Sales: One-time product sales of natural stones, aggregates, and construction materials sold by weight (tonnes). Products include paving stones, wall stones, floor slabs, railway ballast, hydraulic engineering stones, and specialized substrates.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Interstone is a Swiss-headquartered distributor and value-chain operator for natural stones, raw materials, and construction materials serving road construction, civil engineering, landscape architecture, railway construction, hydraulic engineering, and sports field construction across Switzerland, Germany, Liechtenstein, Benelux, Austria, and Italy. The company supplies more than 400 article types including natural stones (granite, limestone, quartzite, porphyry, basalt, gneiss), paving stones, wall stones, floor slabs, bulk materials (sand, gravel, crushed stone, railway ballast), quartz sands, substrates, seeds, and specialty systems such as the licensed Kasseler Sonderborde accessibility curbs and Stabilizer/StaLok sports field surfaces.

Product overview

Interstone is a comprehensive natural stone and construction materials supplier offering a broad portfolio of products for construction trades. The core offerings include various natural stones (granite, limestone, quartzite, porphyry, basalt, gneis) sold under unified product categories. Key specialty products include the licensed Kasseler Sonderborde system for transit stations, Stabilizer/StaLok products for sports fields, and environment-focused rainwater management systems. The product range spans from bulk materials (sand, gravel, crushed stone) to finished products (paving stones, wall stones, floor slabs) and specialized substrates and seeds for sports field construction. Interstone positions itself as a one-stop supplier offering complete solutions for trades including road construction, garden/landscape construction, water engineering, railroad construction, and sports field construction.

Differentiator

Problem solved

Functional benefit

Brands

• Fair Stone: Internationaler Sozial- und Umweltstandard für Natursteinimporte aus Entwicklungs- und Schwellenländern. Zertifizierungsprogramm der win_win GmbH.
• Stabilizer und StaLok
• Kasseler Sonderborde

Products and services

• Natursteine (Natural Stones) Wide range of natural stones including granite, limestone, quartzite, porphyry, basalt, and gneiss supplied for various construction applications across road, civil, landscape, and hydraulic engineering trades.
• Kasseler Sonderborde (KSB) Licensed producer of original Kasseler Sonderborde (special curb stones) for bus stops, tram and train stations, including ramps, transition stones, crossing borders, floor indicators and accessibility accessories.
• Pflastersteine (Paving Stones) Various paving stone products including granite, porphyry, basalt, and specialty varieties such as Wackenpflaster Typ 'Spezial Basel' for street, plaza, and historic restoration paving.
• Mauersteine & Quadersteine (Wall Stones & Cuboids) Masonry stones including Jura limestone and granites for wall construction, landscaping, and retaining wall applications such as Granit Mauersteine Portugal and fränkischer Muschelkalk.
• Bodenplatten (Floor Slabs) Natural stone floor slabs and tiles for exterior and interior applications, including various surface finishes such as sawn-flamed.
• Sande, Splitte, Schotter (Sand, Gravel, Crushed Stone) Bulk construction materials including various grades of sand (including drainage sand 0-8mm and 0-4mm), gravel, and crushed stone such as Alpenkalk Schotter for road construction and sports field applications.
• Railway Ballast Certified granite railway ballast such as grade 22-63 supplied in high volumes for railway track and sorting center construction.
• Granite Cyclops (Hydraulic Engineering Stones) Large individual stones such as granite cyclops SWG with 500-700 kg individual stone weight supplied for hydraulic engineering structures, waterway protection, and erosion control.
• Stabilizer & StaLok Products Stabilized surface systems for sports fields and pathways, mixed with granite or Jura crushed sand for color-stable, natural surfaces with professional NCS color system communication.
• Quarzsande & Substrate (Quartz Sands & Substrates) Quartz sands and specialized substrates including Dachsubstrate (roof substrates), Trogerden, vegetation substrates, and substrates for sports fields, beach areas, playground surfaces, and tree applications.
• Saatgut & Samen (Seeds) Grass seeds including RPR, SOS Sport, Resilient Blue, and Happy Lawn varieties for sports field and landscape applications.
• Regenwassermanagement (Rainwater Management Systems) Environmentally-focused construction materials and systems for sponge city (Schwammstadt) elements and rainwater management.
• Umwelt-System-Baustoffe (Environmental System Construction Materials) Environmentally-focused construction materials contributing to sustainability and environmental protection in construction projects.
• Natursteinaufbereitung (Natural Stone Processing Service) Processing and preparation services for natural stones including recycling of used curb stones and custom manufacturing.

Named customers6 records

Segments7 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Fair Stone AssociationcoreStrategic or Co-development PartnerFair Stone is the international social and environmental standard for natural stone imports from developing and emerging countries. The standard was developed in 2007 by experts from win_win GmbH, ISSA, and international labor law specialists. Interstein is a Fair Stone partner, offering customers stones that meet stricter criteria than ILO core conventions with full transparency through certificates and the Fair Stone website.

Scale indicators4 records

Recent moves13 records

Expansion highlights4 records

Broad incumbents

• Holcim Ltd: Global building materials giant with significant aggregates, ready-mix and cement operations across Europe. Operates a vertically integrated supply chain at much larger scale than Interstein, with overlapping product categories (aggregates, stone, construction materials) and overlapping DACH market presence.
• Heidelberg Materials AG: Major European cement, aggregates and ready-mixed concrete producer headquartered in Heidelberg, Germany. Competes with Interstein in the aggregates and construction materials supply space across the German-speaking market, though at substantially larger scale and with a broader product portfolio.
• Saint-Gobain SA: French multinational building materials group with distribution operations across Europe. Competes indirectly with Interstein in stone and construction material distribution, though Saint-Gobain's portfolio spans insulation, glass, and finished building products well beyond natural stone.
• CRH plc: Irish-headquartered global building materials group with extensive European aggregates, asphalt and concrete operations. Overlaps with Interstein in aggregates supply to construction markets across Western Europe, though CRH operates at much larger scale and integrates further downstream.
• Wienerberger AG: Austrian-headquartered building materials producer specializing in bricks, clay tiles and pipe systems, with growing aggregates exposure. Targets similar European construction markets to Interstein and shares the DACH regional customer base for municipal and residential construction.
• Boral Limited: Australian building materials and aggregates producer with extensive quarrying and construction material distribution operations. Comparable product mix (aggregates, concrete, stone) and distribution-led model, though focused on the Asia-Pacific market rather than Europe.

Direct peers

• Travis Perkins plc: UK-listed specialist distributor of building materials serving trade customers through a national branch network. Closely comparable business model to Interstein — multi-branch distribution of construction inputs to B2B trade customers with expert consulting and logistics. Different geography (UK) but analogous operating model and customer segment.
• SIG plc: UK-listed specialist distributor of building products (insulation, roofing, interior finishes) to construction trades across Europe. Shares Interstein's B2B specialist distribution model with expert sales consulting, multiple branches and value-added services for trade customers.
• BayWa AG: German-headquartered multi-trade distributor with a building materials division serving construction professionals across southern Germany and Austria. Directly comparable in scale, geography and business model — multi-branch specialist distribution of construction inputs to trade customers with logistics infrastructure.

Emerging players

• Cementir Holding SpA: Italian-headquartered cement and aggregates producer with specialty products including white cement and concrete solutions. More regional than global incumbents, with overlapping interest in aggregates and specialty construction products sold across European markets including Italy and DACH.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/intersteinag
• Instagraminstagram.com/interstein_world

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries5 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 Interstone