Wesemann

What Wesemann does

Wesemann Projects B.V. is a Dutch privately-held manufacturer founded in 1945 and headquartered in Rotterdam, Netherlands, specializing in the design and production of custom-built transformers, chokes, frequency convertors, UPS systems, and pre-magnetizing systems. Its portfolio spans cast resin, oil immersed, medium voltage, distribution, ferrite, toroidal, variable, and explosion-proof transformers, plus specialized power supplies with integrated customizable control panels for CT and MRI scanners. The firm positions itself as a total solution provider for technically demanding applications where standard catalog products are insufficient.

The company serves six core verticals: marine and offshore platforms, energy traction and renewable energy, utility/construction/healthcare, oil and gas, industrial custom builds, and explosion-proof installations. Customers are industrial installers and end-users reached through direct project sales, a dealer/reseller network, and a webshop (wesemann-online.com). Wesemann augments its own product line through a broad international partner ecosystem including Celme, Imefy, Hyosung, Hammond Power Solutions, Static Power, LEM, Pikatron, and RS Isolsec. Pricing is quote-based on bespoke specifications and is not publicly disclosed.

Quality and compliance are central to the value proposition. Wesemann holds KEMA, UL, and ISO 9001:2015 certifications (ISO 9001 since 1994), follows ISO 26000 for corporate social responsibility, and is a member of FME-CWM. Its proprietary pre-magnetizing system was entered into the Dutch Chamber of Commerce SME Innovation top 100 in 2016. The business is family-run with 11–50 employees and no disclosed external investment, funding rounds, or M&A activity.

Name

Wesemann

Legal name

Wesemann Projects B.V.

Website

https://wesemann.nl

Company type

Private

Founded year

1945

Operating status

Operating

Headcount range

11–50 employees

Short description

Wesemann Projects B.V. is a Dutch family-run transformer manufacturer, founded 1945 in Rotterdam, designing custom-built transformers, chokes, and power supplies for marine/offshore, energy, healthcare, oil and gas, and industrial clients.

Ownership category

akta.pro rank

Product category

Industrial Transformers

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612), Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)

akta.pro secondary industries

Power Transformers, Reactors & Auxiliary Power Systems (EUADACAJ), Instrument Transformers (CTs/VTs) & Sensors (Conventional/Optical) (EUADACAG), Transformer/Driver/Power Supply Service & Replacement (HSAIAHAL)

Keywords

• Custom transformer manufacturing
• Power transformer solutions
• Marine offshore transformers
• Industrial electrical equipment
• Frequency convertor systems

Headquarters

HQ city

Rotterdam

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Transformer Manufacturing: Design and manufacture of high-end transformer solutions for industrial applications including marine, offshore, energy, utility, construction, healthcare, oil and gas, and custom industrial builds
2. Transformer Maintenance Services: Maintenance services for transformers to ensure operational reliability and longevity

Go-to-market motion2 records

Distribution channels3 records

Marketing channels3 records

Core offering

Wesemann designs and manufactures high-end transformer solutions, chokes, frequency convertors, UPS systems, pre-magnetizing systems, and power supplies with integrated control panels for industrial installers and end-users. The company serves specialized sectors including marine and offshore, energy/traction/renewable energy, utilities and healthcare facilities, oil and gas, and demanding industrial applications, and also provides transformer maintenance services as a total solution provider.

Product overview

Wesemann is a transformer innovator since 1945, designing and manufacturing high-end transformer solutions for industrial installers and end-users. The company operates as a total solution provider offering a comprehensive portfolio of power-related products including various transformer types (cast resin, oil immersed, medium voltage, distribution, ferrite, toroidal, variable), frequency convertors, UPS systems, pre-magnetizing systems, power supplies with integrated control panels for medical imaging equipment, and instrument transformers. These products serve specialized sectors including marine and offshore, energy traction and renewable energy, utilities and healthcare facilities, oil and gas, and industrial applications with custom build solutions. The company also offers transformer maintenance services alongside its product portfolio.

Differentiator

Problem solved

Functional benefit

Products and services

• Transformers High-end transformer solutions for industrial installers and end-users across multiple sectors including marine/offshore, energy/traction/renewable, utilities, oil and gas, and industrial applications, including cast resin, oil immersed, medium voltage, distribution, ferrite, toroidal, and variable transformer types.
• Power Supplies with Integrated Control Panel for CT and MRI Scanners

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Hammond Power Solutions: Canadian designer and manufacturer of dry-type and cast resin transformers, reactors, and specialty magnetics. Comparable to Wesemann because both serve industrial custom-build and OEM transformer needs with custom-engineered magnetics, and Hammond is also a Wesemann distribution partner indicating strong product overlap.
• Trench Group: Global manufacturer of instrument transformers (current/voltage), coils, and power-quality solutions. Comparable to Wesemann's LV-MV instrument transformer and chokes/inductance coil offerings for power systems.
• SGB-SMIT Group: European power and distribution transformer manufacturer with custom engineering capability across industrial, traction, and renewable segments. Directly comparable to Wesemann as a specialty power transformer maker serving European OEMs and industrial customers.
• Celme S.r.l. Italian manufacturer of cast resin and dry-type transformers for industrial, renewable, and marine applications. Comparable specialty industrial transformer maker serving similar verticals as Wesemann and also a Wesemann distribution partner.
• Hyosung Heavy Industries (Transformer Division): Korean manufacturer of large power and distribution transformers with European service operations. Comparable to Wesemann on industrial-grade power transformer design/build; also a stated Wesemann channel partner.
• Imefy Group: Spanish manufacturer of cast resin and oil-immersed distribution and power transformers for industrial and renewable applications. Directly comparable to Wesemann's cast resin and distribution transformer lines serving industrial and energy customers.

Broad incumbents

• Siemens Energy Transformers: Major OEM of power, distribution, and special-purpose transformers for utilities, marine, and industrial customers. Broad incumbent competitor to Wesemann with overlapping marine/offshore and industrial segments.
• Schneider Electric (Transformers / EIC): Global electrical equipment manufacturer with a portfolio of distribution transformers, UPS systems, and power-quality products. Overlaps with Wesemann's transformer and UPS offerings within Schneider's broader portfolio.
• Eaton (Transformers / Power Quality): Global electrical manufacturer offering dry-type transformers, UPS systems, and power-quality products. Broad incumbent relevant as a competitor to Wesemann across industrial and mission-critical power applications.
• ABB Electrification (Hitachi Energy): Global incumbent offering power, distribution, and specialty transformers across utility, industry, and rail. Directly overlaps with Wesemann's portfolio but operates at much larger scale; relevant as the dominant incumbent Wesemann competes with.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/wesemann-bv
• Xx.com/wesemannbv

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Wesemann