What Vlassenroot does

Vlassenroot is a family-owned Belgian steel processing company founded in 1926 that produces complex, extra-large (XXL) steel structures and components for industrial customers. The company operates three vertically integrated production sites in Belgium (Groot-Bijgaarden headquarters), Germany (Schwerte, via subsidiary KSK GmbH), and Poland (Gliwice, via Vlassenroot Polska Sp. z o.o.), employing approximately 650 people across cutting, bending, welding, machining, assembly, and painting operations. Reported annual turnover is €90 million, with annual throughput of approximately 13,000 tons of steel, 500,000+ tons welded, and 30,000 profiles bent.

The company's core technical capability is the production of steel components that exceed standard industrial dimensions and tolerances. Vlassenroot operates 24-meter press brakes with 4,000-ton bending force, a 19.5-meter laser hybrid welding installation, 30-meter laser cutting beds with 5-axis CAD-CAM control, and CNC machining centers totaling 240m² with 0.02mm accuracy. It has accumulated expertise in high-strength, armored, ballistic, and abrasion-resistant steel processing, supported by ISO 9001:2015, EN 15085-2 CLA (railway), EN 1090-2 EXC4 (structural steel), and BS OHSAS 18001 certifications. Notable production milestones include 4,000+ laser-hybrid welded crane booms and 1,600+ armored vehicle components.

Vlassenroot operates as a project-based B2B contract manufacturer with custom engineering-driven pricing and multi-year contracts. Its customer base is concentrated in five verticals: lifting/mobile cranes (telescopic booms, chassis, turntables — customers include Sarens and NLMK), railway (underframes and laser-welded side panels — Alstom Lyon), energy (wind turbine frames), military/defense (armor and ballistic plates for European primes), and construction (bridge profiles up to 24m). Distribution is direct via an engineering contact form with 48-hour response times; no digital self-serve channel, marketplace, or PLG motion is used. Marketing is account-based and multilingual (English, French, Polish).

Name

Vlassenroot

Legal name

VLASSENROOT NV

Website

https://vlassenroot.be

Company type

Private

Founded year

1926

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Vlassenroot is a family-owned Belgian steel fabricator (founded 1926) that produces complex XXL steel structures for mobile cranes, railway, energy, defense, and construction customers across Belgium, Germany, and Poland.

Ownership category

akta.pro rank

Product category

Custom Steel Fabrication

NAICS

Plate Work Manufacturing (332313), Fabricated Structural Metal Manufacturing (332312), Steel Product Manufacturing from Purchased Steel (3312)

SIC

Sheet Metal Work (3444), Construction, Mining & Materials Handling Machinery & Equip (3530)

akta.pro primary industry

Steel Plate, Sections & Welded Assemblies (IMADACAD)

akta.pro secondary industry

Structural Steel Fabrication (IMADACAA)

Keywords

• Steel fabrication services
• Complex steel structures
• Custom steel components
• Heavy metal manufacturing
• Industrial steel processing

Headquarters

HQ city

Gliwice

HQ country

Poland

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Revenue model

1. Contract Manufacturing of Steel Components: Vlassenroot operates as a subcontractor manufacturing complex steel structures and components. Revenue is generated through project-based contracts with enterprise customers in lifting, railway, military, energy, and construction industries. Services span the full value chain from cutting and bending to welding, machining, assembly, and painting.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Vlassenroot is a vertically integrated contract manufacturer of complex steel structures and components. The company processes steel end-to-end — cutting, bending, welding, machining, assembly and painting — across three production sites in Belgium, Germany and Poland. It delivers finished steel components such as telescopic booms, chassis, turntables, railway underframes, wind turbine frames, armoured vehicle parts, and bridge profiles to enterprise customers in the lifting, railway, energy, military and construction industries.

Product overview

Vlassenroot is a vertically integrated steel manufacturing company offering a comprehensive suite of steel processing services (cutting, bending, welding, machining, assembly, and painting) as well as finished steel components and structures. The company operates three production sites in Belgium, Germany, and Poland, serving industries including lifting (telescopic booms, chassis, turntables), railway (underframes for trains and metros), energy (wind turbine frames, offshore structures), military (armored vehicle components), and construction (bridge profiles, large architectural structures). Key products include laser-welded telescopic booms up to 16.2m, chassis up to 17 tons, railway underframes up to 19 tons, wind turbine frames up to 35 tons, and armored vehicle components with materials ranging from 300HB to 600HB.

Differentiator

Problem solved

Functional benefit

Brands

• KSK GmbH: Steel welding operations subsidiary in Germany

Products and services

• Telescopic Booms

Quantifiable outcome

• Precision machining accuracy up to 0.02mm over total length
• +3 more outcomes

Named customers6 records

Segments6 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators10 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Bladt Industries: Danish heavy steel fabricator producing offshore wind foundations, transition pieces and large-scale steel structures. Comparable in capacity, offshore wind end-market focus and complex welded structural assemblies.
• Sif Group: Dutch manufacturer of monopile foundations and heavy steel tubular components for offshore wind. Highly comparable in XXL plate processing, welding throughput and offshore wind customer overlap with Vlassenroot's energy segment.
• Heerema Fabrication Group: Dutch heavy steel fabricator producing complex offshore structures (jackets, topsides) and large civil works. Comparable in XXL plate processing, welding capacity and project-based contract manufacturing model serving energy and infrastructure customers.
• Cimolai: Italian heavy steel fabricator delivering bridges, stadium structures, naval and offshore projects. Comparable on XXL welded assemblies, bridge profile work and complex one-off fabrications serving European infrastructure customers.
• Martifer: Portuguese steel fabricator focused on wind energy towers, structures and naval/metalworking activities. Comparable in steel processing for wind OEMs and in large structural fabrications, overlapping directly with Vlassenroot's energy segment.
• Smulders: Belgian/Dutch heavy steel fabricator serving offshore wind, oil & gas and civil engineering with cutting, welding and assembly capabilities. Closest geographic and capability peer to Vlassenroot, particularly in offshore wind frames and structural fabrications.
• Eiffage Métal: French heavy steel fabrication arm of Eiffage, producing complex steel structures for infrastructure, energy and industrial projects. Comparable in vertical integration, scale and the same set of lifting/rail/energy end markets across Europe.
• Iemants: Belgian structural steel fabricator with similar heritage and capabilities in heavy welding, plate processing and large assemblies for industrial and infrastructure customers. Directly comparable on geography, end-markets and engineering-heavy project work.

Emerging players

• Steelwind Nordenham: German monopile and heavy steel foundation manufacturer (Dillinger Group). Adjacent in XXL steel processing and offshore wind, but more specialized and narrowly focused on monopiles rather than Vlassenroot's broader multi-segment fabrication footprint.

Broad incumbents

• Dillinger Hütte: Major European heavy steel plate producer supplying the same high-strength, ballistic and offshore grades that Vlassenroot processes. Upstream comparator — different stage of value chain but shared end customers and material expertise.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries2 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 Vlassenroot