What InterCal Group does

InterCal Group is the consolidated lime and limestone production arm of the Austrian Wietersdorfer Group, operating since January 2021 under a single brand across three wholly-owned subsidiaries: InterCal Austria GmbH (Peggau), InterCal Croatia d.o.o. (Sirač and Ličko Lešće), and InterCal Slovenija d.o.o. (Zagorje and Zidani Most, incorporating the acquired Apnenec d.o.o.). The group produces and sells limestone in multiple grain sizes, quicklime (Branntkalke), hydrated lime (Hydratkalk), customer-specific lime mixtures, and stone aggregates from the Čardak quarry, serving end-markets in agriculture and forestry, the chemical industry, iron and steel, environmental protection, construction and civil engineering, soil stabilization, and pulp and paper.

The underlying technology is conventional lime and limestone processing—calcination of limestone into quicklime, controlled hydration to produce hydrated lime, crushing and sizing of raw limestone, and blending of custom formulations tailored to industrial or agricultural specifications. Production assets are quarry-linked and regionally distributed, which is the primary source of the group's competitive position: physical proximity to customers in the Alpine-Adriatic region lowers freight cost per ton, and ownership of reserves such as the Čardak quarry provides resource security.

InterCal generates revenue through direct B2B sales of these lime and limestone products from its five production facilities to industrial and agricultural customers across Austria, Croatia, and Slovenia, with stated ambition to expand toward the Black Sea region. Pricing is not publicly disclosed, and the customer base spans a broad horizontal set of use cases rather than a single vertical. The group operates as a private subsidiary of Wietersdorfer Alpacem GmbH (part of the Wietersdorfer diversified industrial conglomerate), with no external investors, public listing, or disclosed financial figures.

Name

InterCal Group

Legal name

InterCal Austria GmbH

Website

https://intercal.org

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

11–50 employees

Short description

InterCal Group is the lime and limestone production arm of Austria's Wietersdorfer Group, operating five plants across Austria, Croatia, and Slovenia to supply industrial and agricultural customers in sectors including steel, chemicals, environmental protection, construction, and paper.

Ownership category

akta.pro rank

Product category

Industrial Lime and Limestone Manufacturing

NAICS

Lime Manufacturing (327410), Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (3253), Ground or Treated Mineral and Earth Manufacturing (327992)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400), Chemicals & Allied Products (2800)

akta.pro primary industry

Limestone Quarrying (Industrial & Construction Grade) (IMAKAHAC)

akta.pro secondary industries

Soil Amendments & Conditioners (Lime/Gypsum/Humates) (IMAEAEAH), Sand & Gravel Extraction & Processing (IMAKAHAB)

Keywords

• Industrial lime production
• Limestone processing
• Quicklime manufacturing
• Soil stabilization products
• Stone aggregates supply

Headquarters

HQ city

Peggau

HQ country

Austria

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Lime and Limestone Product Sales: Production and distribution of limestone, quick lime, hydrated lime, and custom lime mixtures for industrial and agricultural customers across three countries

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

InterCal Group manufactures and sells limestone, quicklime, hydrated lime, custom lime mixtures, and stone aggregates to industrial and agricultural customers. Production is conducted at five locations in three countries (Austria, Croatia, Slovenia) under entities InterCal Austria GmbH, InterCal Croatia d.o.o., and InterCal Slovenija d.o.o. (incorporating Apnenec d.o.o.). Products serve end-uses including agriculture/forestry, chemicals, iron & steel, environmental protection, construction & civil engineering, soil stabilization, pulp & paper, and stone aggregates.

Product overview

InterCal Group operates as a unified multi-location lime and limestone production company, offering a portfolio of core products including limestone, quicklime, hydrated lime, custom lime mixtures, and stone aggregates. The company serves diverse industrial and agricultural sectors across Austria, Slovenia, and Croatia through five production locations. Products are available in various grain sizes and formulations to meet specific customer requirements.

Differentiator

Problem solved

Functional benefit

Products and services

• Limestone (Kalksteine) Natural limestone produced in various grain sizes for industrial and agricultural applications, including use as a raw material for downstream lime processing and for direct sale.
• Quicklime (Branntkalke) Quicklime (calcium oxide) produced by calcining limestone, available in various grain sizes for industrial and commercial use across multiple end-markets.
• Hydrated Lime (Hydratkalk) Hydrated lime (calcium hydroxide) produced by reacting quicklime with water, used across various industrial and agricultural applications.
• Custom Lime Mixtures Customer-specific lime mixtures formulated for particular industrial and agricultural requirements, with tailored soil stabilization products matched to specific geological conditions.
• Stone Aggregates Stone aggregates produced by processing limestone from the Čardak quarry, located approximately 2 km from the office buildings at the Ličko Lešće facility in Croatia, for use as construction materials.

Segments8 records

Ideal customer profiles8 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Wietersdorfer Group (Wietersdorfer Alpacem GmbH)coreStrategic or Co-development PartnerInterCal operates as the lime division of the Wietersdorfer Group. Since January 2021, all lime activities of Wietersdorfer have been combined under the InterCal umbrella brand. Wietersdorfer Alpacem GmbH (Ferdinand-Jergitsch-Straße 15, 9020 Klagenfurt, Austria) serves as the parent company responsible for data protection coordination and joint controllership under GDPR Art. 26.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Lhoist Group: Lhoist is the world's largest privately held lime producer, operating over 90 plants across more than 30 countries. It is directly comparable as a multi-country industrial lime, dolomite, and mineral products platform serving steel, environmental, construction, and agricultural end-markets, though at vastly greater scale than InterCal.
• CRH plc: CRH is one of the largest global aggregates and building materials producers with extensive limestone quarrying and lime operations across Europe. It overlaps with InterCal in stone aggregates and lime supply to construction and infrastructure customers, though as a vastly larger diversified incumbent.
• Heidelberg Materials: Heidelberg Materials (formerly HeidelbergCement) is a major global cement, aggregates, and lime producer with extensive European operations. Comparable to InterCal as a European limestone miner with downstream lime and aggregates products serving construction and industrial customers.
• Carmeuse: Carmeuse is a global leader in lime and limestone products with operations across Europe, North America, and Africa. It is a direct competitor in industrial lime, environmental applications, and aggregates, serving overlapping end-markets including steel, flue gas treatment, and construction.

Direct peers

• SMA Mineral: SMA Mineral is a Swedish producer of industrial minerals including lime, limestone, and dolomite for steel, environmental, and construction applications. Comparable to InterCal as a Northern European multi-site lime platform serving similar industrial and environmental end-markets.
• Nordkalk: Nordkalk is a leading Northern European producer of limestone-based products (quicklime, hydrated lime, fillers) owned by Rettig Group. It directly competes with InterCal in regional European industrial and agricultural lime markets, sharing a similar multi-site, multi-country production footprint and end-market mix.
• Schaefer Kalk: Schaefer Kalk is a family-owned German lime producer with quarry and kiln operations serving steel, environmental, chemical, and construction customers. It is comparable to InterCal as a privately held, regional European industrial lime manufacturer focused on quicklime, hydrated lime, and specialty lime products.
• Cales de Pachs: Cales de Pachs is a Spanish lime producer operating quarries and kilns in Catalonia serving construction, agriculture, and industrial customers. Comparable to InterCal as a regionally focused European industrial lime manufacturer with similar product mix and customer segmentation.
• Kalkfabrik Netstal: Kalkfabrik Netstal is a Swiss lime and limestone producer with a long history serving construction, agriculture, and industrial customers in the Alpine region. It is directly comparable to InterCal given its similar DACH-region positioning, limestone quarrying, and quicklime/hydrated lime product portfolio.

Regional players

• Wopfinger Baustoffindustrie: Wopfinger is an Austrian building materials producer (part of the Baumit/Schmid Industrie group) focused on lime-based plasters, mortars, and drymix products. While primarily downstream of industrial lime, it is comparable to InterCal given its Austrian base, lime heritage, and overlapping construction/civil engineering customer base.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/intercal-group

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 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 InterCal Group