What Olsberg does

Olsberg GmbH is a family-owned German industrial manufacturer headquartered in Olsberg, North Rhine-Westphalia, tracing its origins to a foundry first documented in 1495. The company operates through three integrated business units: Gusstechnik (Casting Technology), which produces high-precision grey cast iron (Grauguss) and spheroidal graphite iron (Sphäroguss) components with complex thin-walled geometries for industrial customers; Wärmetechnik (Heating Technology), which designs and manufactures energy-efficient fireplace and pellet stoves distributed primarily through the HAGOS fireplace builder trade network; and Feinblechtechnik (Sheet Metal Technology), which fabricates customized housings and enclosures from steel, stainless steel, aluminum, and copper for brand-name manufacturers. The company maintains a wholly-owned subsidiary, Olsberg Königshütte GmbH & Co. KG, located in the Oberharz region, which performs hand form casting and machining for the heating equipment industry and general mechanical engineering.

The company generates revenue through direct B2B sales of industrial castings and sheet metal components, with serial castings finished at the Brilon facility and shipped across Europe. Heating products are sold through specialist trade channels, principally the Ofenbau-Handwerk, with replacement parts and heat storage units distributed via a partnership with PureMotion GmbH & Co. KG. Olsberg employs approximately 260 staff across its three production sites, holds the OH-Gießzeichen quality mark (registered 1925), and in 2025 achieved EcoVadis Silver certification, placing it in the top 6% of assessed companies in its industry class. The company is led by Managing Directors Ulrich Herrmann and Stefan Osebold, who assumed leadership on January 1, 2018, following the discontinuation of the electric heating product line and divestiture of the Japanese subsidiary in 2017.

Name

Olsberg

Legal name

Olsberg GmbH

Website

https://olsberg.com

Company type

Private

Operating status

Operating

Headcount range

251–500 employees

Short description

Olsberg GmbH is a 530-year-old German family-owned industrial manufacturer operating three business units: precision iron casting (Gusstechnik), fireplace and pellet stoves (Wärmetechnik), and custom sheet metal fabrication (Feinblechtechnik), serving industrial manufacturers and the heating trade across Europe from facilities in Olsberg, Brilon, and Königshütte.

Ownership category

akta.pro rank

Headquarters

HQ city

Olsberg

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Casting Components (Gusstechnik): Production and sale of high-precision cast components for industrial customers. Cast serial castings are finished in Brilon and shipped to customers in Europe and beyond. Focus on demanding grey and spheroidal graphite castings.
2. Heating Products (Wärmetechnik): Design-oriented fireplace and pellet stove sales. Products distributed through fireplace builder trade (Ofenbau-Handwerk) and via dealer partners. Replacement parts and heat storage units available through partner PureMotion.
3. Sheet Metal Products (Feinblechtechnik): Customized sheet metal solutions (steel, stainless steel, aluminum, copper) primarily for external business partners, including housings for brand-name manufacturers.
4. Replacement Parts & Heat Storage: Replacement parts for existing heat storage units continue to be available. Heat storage products under Olsberg brand distributed through partner PureMotion GmbH & Co. KG.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

Olsberg GmbH manufactures high-precision cast components (grey and spheroidal graphite iron), customized sheet metal parts (steel, stainless steel, aluminum, copper), and design-oriented fireplace and pellet stoves. Operations span three business units—Gusstechnik (casting), Wärmetechnik (heating technology), and Feinblechtechnik (sheet metal)—with production at the Olsberg, Brilon, and Königshütte sites serving industrial manufacturers and the fireplace builder trade across Europe.

Product overview

Olsberg GmbH operates as a diversified industrial manufacturing company organized into three core business units: Gusstechnik (Casting Technology), Wärmetechnik (Heating Technology), and Feinblechtechnik (Sheet Metal Technology). Gusstechnik specializes in high-precision cast components using modern casting methods, producing complex thin-walled castings for various industries. Wärmetechnik develops and produces fireplace stoves and pellet stoves with environmentally friendly, energy-efficient technology. Feinblechtechnik provides customized sheet metal processing for thin materials including steel, stainless steel, aluminum, and copper. A fourth legacy product line, Elektroheiztechnik (electric heating technology), was discontinued in 2017 but replacement parts and heat storage units remain available through partner PureMotion GmbH. The company also offers quality management services for cast iron production.

Differentiator

Problem solved

Functional benefit

Brands

• Olsberg Gusstechnik: Business unit specializing in the production of high-precision cast components using modern casting processes
• Olsberg Wärmetechnik
• Olsberg Feinblechtechnik
• PureMotion Olsberg Wärmespeicher

Products and services

• Gusstechnik (Casting Technology) Manufacturing of high-precision cast components (grey cast iron and spheroidal graphite iron) using modern casting methods, focused on complex, thin-walled castings for industrial customers in the investment goods industry.
• Wärmetechnik – Kamin- & Pelletöfen (Heating Technology – Fireplaces & Pellet Stoves) Design-oriented, energy-efficient fireplace inserts and pellet stoves for residential heating, distributed through the Ofenbau-Handwerk (fireplace builder trade), dealer partners, and the HAGOS Börse trade fair channel.
• Feinblechtechnik (Sheet Metal Technology) Customized sheet metal processing in steel, stainless steel, aluminum, and copper, producing high-precision sheet metal components for external business partners including housings and enclosures for brand-name manufacturers across electronics, construction, and other industries.
• Elektroheiztechnik (Electric Heating Technology) – Replacement Parts & Heat Storage Legacy electric heating product line (heat storage units, decentralized heating-ventilation systems, infrared and direct heaters) discontinued in production; Olsberg-branded heat storage units and replacement parts continue to be supplied through distribution partner PureMotion GmbH & Co. KG in Germany.

Quantifiable outcome

• Over 90% recycling rate in foundry operations
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Three partnerships are on record, tiered core and minor.

• PureMotion GmbH & Co. KGcoreChannel Partner/ Reseller/ Distributor · 1 January 2017PureMotion GmbH & Co. KG distributes Olsberg heat storage products (Wärmespeicher) in Germany under the Olsberg brand name. Contact address: Feldgasse 2a, D-09399 Niederwürschnitz (retail) / Promnitzer Fußweg 2, D-09376 Oelsnitz (business). Phone: +49 37296 925841.
• Josefsheim gGmbH (Olsberg-Bigge)minorStrategic or Co-development PartnerJosefsheim offers support to people with disabilities enabling their participation in society. A group from Josefsheim's 'Bigger Werkstätten' (sheltered workshop) has been working at the Olsberg company location for many years, representing a long-standing social partnership.
• Initiative Energieeffizienz- und Klimaschutz-NetzwerkeminorOthersOlsberg participates in this government-backed initiative for energy efficiency and climate protection networks, receiving a participation certificate. The initiative supports companies in reducing energy consumption and emissions.

Scale indicators7 records

Recent moves9 records

Expansion highlights5 records

Emerging players

• MCZ Group S.p.A. Italian pellet stove and fireplace manufacturer with growing presence across Europe. Comparable to Olsberg Wärmetechnik in pellet/fireplace category, with a more pan-European distribution footprint and emerging challenger brand position.
• EdilKamin S.p.A. Italian manufacturer of biomass stoves, fireplaces, and pellet heating products. Comparable to Olsberg on product category and European trade channel model, though focused on Southern European markets.

Direct peers

• Halberg Guss GmbH: German foundry producing iron cast components for passenger cars and commercial vehicles. Comparable to Olsberg's industrial casting business on materials (grey/ductile iron), end-market overlap, and European B2B sales motion.
• Oranier Heiztechnik GmbH: German mid-market fireplace, pellet stove and heating technology brand. Comparable to Olsberg Wärmetechnik on product range, German trade and dealer channel focus, and similar price/positioning tier.
• Wodtke GmbH: German pellet stove and fireplace manufacturer with a similar specialty-trade distribution model. Directly comparable to Olsberg's Wärmetechnik unit on product category, German customer base, and trade-fair-driven GTM.
• RIKA Innovative Ofentechnik GmbH: Austrian manufacturer of pellet stoves and wood-burning fireplaces serving the same Ofenbau/Heizungsbau trade channel as Olsberg Wärmetechnik. Closest competitor in design-led, energy-efficient pellet technology in the DACH market.
• Fritz Winter Eisengießerei GmbH & Co. KG: German iron foundry producing grey and ductile (spheroidal graphite) castings for the automotive and machinery industries. Direct comparable to Olsberg's Gusstechnik unit in casting technology, customer base, and German Mittelstand profile.

Broad incumbents

• Viessmann: Major German heating, industrial and refrigeration systems manufacturer. Overlaps with Olsberg on residential heating solutions but spans a far broader technology portfolio including heat pumps and industrial refrigeration.
• Buderus (Bosch Thermotechnik): Broad German heating incumbent under Bosch offering boilers, heat pumps, and hybrid systems. Comparable on residential heating products but operates at vastly larger scale across the entire HVAC portfolio, of which Olsberg's Wärmetechnik is a niche player.

Others

• Schiedel GmbH: European leader in chimney and flue systems sold through the same Ofenbau trade channel as Olsberg Wärmetechnik. Adjacent ecosystem participant — not a direct competitor, but a key complementary product in every Olsberg stove installation.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/OlsbergGmbH
• LinkedInde.linkedin.com/company/olsberg-gmbh-gusstechnik
• Instagraminstagram.com/olsberg.gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

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 Olsberg