What FEHRMANN Windows does

FEHRMANN GmbH is a Hamburg-based, fifth-generation family-owned industrial manufacturer founded in 1895, operating through two divisions: FEHRMANN Windows and FEHRMANN MaterialsX. The Windows division produces specialty pressure-tight and safety windows for maritime, plant construction, and structural engineering applications, including the patented "fff" reinforced ship window system with its proprietary clamping technology, and Knief safety towing hooks for marine use. The company has been described in regional press as a world market leader in safety windows for shipping, with installations on research vessels, rescue boats, naval ships, mega yachts (including Enigma, Lady Moura, VAVA II, and M/S Christina), and landmark structures such as the Elbphilharmonie and Berlin TV Tower. Institutional customers include the Alfred Wegener Institute, DGzRS, the German Bundestag, Krones, and Aqseptence.

The MaterialsX division, launched in 2023, operates MatGPT, an AI-driven materials informatics platform leveraging more than 50 years of proprietary aluminum formulation data to support generative alloy design, knowledge retrieval, and predictive analytics. The platform was commercialized in two tiers: MatGPT Enterprise for industrial customers (October 2024) and MatGPT Classroom for academic use (January 2025). FEHRMANN also holds proprietary rights to the AlMgty® aluminum alloy, licensed to TriAlCo since December 2023. The Windows division is led by Director Hagen Schwemer (promoted January 2021), and the broader group is led by Henning Fehrmann, representing the fifth generation of family ownership. Underlying technical assets include the proprietary AlMgty® alloy, the patented fff clamping system, and a deep archive of aluminum metallurgy data feeding the MatGPT models.

Name

FEHRMANN Windows

Legal name

FEHRMANN GmbH

Website

https://fehrmann-windows.com

Company type

Private

Founded year

1895

Operating status

Operating

Headcount range

1–10 employees

Short description

FEHRMANN GmbH is a Hamburg-based, fifth-generation family-owned manufacturer of specialty pressure-tight windows for maritime, plant construction, and structural engineering, and developer of the MatGPT AI materials informatics platform and proprietary AlMgty® aluminum alloy.

Ownership category

akta.pro rank

Product category

Specialty Marine and Industrial Windows

NAICS

Ship Building and Repairing (336611)

SIC

Sheet Metal Work (3444), Fabricated Structural Metal Products (3440)

akta.pro primary industry

Life-Saving Appliances & Safety Equipment (Davit Systems, Lifeboats, Firefighting) (IMAJAIAG)

akta.pro secondary industry

Deck Machinery & Mooring Systems (Winches, Windlasses, Capstans) (IMAJAIAA)

Keywords

• Pressure-tight ship windows
• Specialty marine windows
• Industrial plant windows
• Flood protection windows
• AI materials development

Headquarters

HQ city

Hamburg

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Specialty Window Sales: Design, manufacture, and sale of pressure-tight specialty windows for shipbuilding, plant construction, and structural engineering. Both custom-made and large series production. Revenue derived from direct B2B sales to shipyards, research institutions, naval forces, yacht builders, and industrial plant operators.
2. Towing Hook Products and Inspection Services: Manufacture of Knief safety towing hooks for marine applications, including regular inspection services (monthly inspections via BG Verkehr).
3. MatGPT Software Licenses: AI-powered material development platform distributed via individual licenses. MatGPT Pro provides browser-based expert knowledge access; MatGPT Enterprise enables companies to build proprietary knowledge databases on a secure European private cloud.
4. AlMgty® Licensing: Licensing of proprietary high-performance aluminum alloy technology. A license agreement was concluded with TriAlCo for the production of AlMgty®.

Pricing tiers

Go-to-market motion3 records

Distribution channels1 record

Marketing channels5 records

Core offering

FEHRMANN designs and manufactures custom pressure-tight specialty windows for shipbuilding, plant construction, and structural engineering applications. Products include the patented fff monster-wave resistant ship window system, high-strength windows for research vessels, naval ships, mega yachts and sea rescue cruisers, and flood-protection windows for buildings and landmarks. The company also manufactures Knief safety towing hooks for marine use and operates an AI-powered materials development platform (MatGPT) under its FEHRMANN MaterialsX division.

Product overview

FEHRMANN is a world-leading manufacturer of pressure-tight specialty windows serving shipbuilding, plant construction, and structural engineering. The core product portfolio includes the patented fff window system (world's first monster wave-resistant ship window), standard ship windows for various vessel types, plant construction windows, and structural engineering windows for flood protection and extreme conditions. The company also manufactures Knief safety towing hooks. Through its FEHRMANN MaterialsX division, the company offers AI-powered material development platforms including MatGPT (for rapid alloy development), MatGPT Enterprise (with proprietary knowledge databases), and MatGPT Classroom (for universities). The flagship aluminum alloy AlMgty® delivers high-performance properties with sustainability benefits.

Differentiator

Problem solved

Functional benefit

Brands

• MatGPT: AI-powered platform for materials development, including MatGPT Pro, MatGPT Enterprise, and MatGPT Classroom for universities.
• fff
• AlMgty

Products and services

• fff Reinforced Ship Windows World's first monster wave-resistant ship window combining maximum safety with low weight. Features patented clamping system for minimal installation costs and quick replacement without welding or gluing. Pressure-tight and flood-resistant. Designed for shipbuilding customers requiring extreme-environment windows.
• Ship Windows High-tech specialty windows for research vessels, sea rescue cruisers, mega yachts, naval ships, coast guard boats and other specialty ships. Includes bullet-resistant and wave-resistant designs meeting highest safety levels. For shipyards, naval forces, research institutions, and yacht builders.
• Windows for Plant Construction Pressure-tight, maintenance-free safety components made of stainless steel, light or heavy metal for industrial plants. Customized window solutions including observation windows, inspection windows, and doors with pressure resistance up to 0.15 bar. For industrial plant operators, food and chemical processing facilities, and water treatment plants.
• Windows for Structural Engineering Specialty windows for flood areas, towers, and monuments providing secure protection against wind, weather, and water under extreme conditions. Includes flood protection windows and facades, smoke exhaust vents, and reversible wing windows. For architects, building owners, and public infrastructure projects.
• Knief Safety Towing Hook Marine towing hook designed for long-term use under extreme conditions. World's first towing hook with rotating hook disc; manufactured according to approved drawings (Germanischer Lloyd). Regular inspections offered through BG Verkehr. For harbor operators, tugboats, and inland waterway vessels.
• MatGPT Browser-based AI platform leveraging expert knowledge in specialized fields such as aluminum and magnesium, enabling rapid material identification and recommendation. Powered by 50+ years of industrial aluminum development data.
• MatGPT Enterprise Advanced AI solution combining MatGPT Pro capabilities with the ability to build and utilize proprietary knowledge databases within a secure private cloud environment hosted in Europe. Accessed via individual company licenses for enterprise customers.
• MatGPT Classroom AI-powered platform providing universities free access to material science education, bridging academic research with industrial applications through access to proprietary industry-relevant insights and public data. Partnered with UCI, Ohio State University, and ACRC.

Quantifiable outcome

• Installation costs reduced by up to 80% compared to welded frames of the same size through the patented fff clamping system
• +4 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability5 records

Feature8 records

Partnerships

Six partnerships are on record, tiered core and minor.

• MatGPT Enterprise CustomerscoreTechnology or Integration · 15 October 2024MatGPT Enterprise enables companies to integrate their internal data into a customized AI platform on a secure European private cloud. Companies can build and utilize proprietary knowledge databases combining MatGPT Pro expert knowledge with company-specific information.
• TriAlCocoreOEM/ Whitelabel/ Licensing Partner · 22 December 2023TriAlCo and FEHRMANN concluded a landmark license agreement for the production of AlMgty®, FEHRMANN's proprietary high-performance aluminum alloy. This licensing arrangement enables TriAlCo to manufacture AlMgty® under FEHRMANN's technology and brand.
• Advanced Casting Research Center (ACRC)coreStrategic or Co-development Partner · 1 November 2022FEHRMANN Materials joined ACRC as a member in November 2022. ACRC is one of the largest industry-university research consortia in North America, focusing on metal casting and digital manufacturing. It serves as an educational and research resource for the global metalworking and foundry industry, providing a forum for primary and secondary producers of aluminum and light metals, equipment manufacturers, suppliers, and end users. Henning Fehrmann is shown with Diran Apelian, Distinguished Professor at UCI's Department of Material Science and Engineering and ACRC founder.
• University of California, Irvine (UCI)coreStrategic or Co-development PartnerFEHRMANN MaterialsX partnership with UCI's Department of Material Science and Engineering within the MatGPT Classroom initiative. Diran Apelian, Distinguished Professor at UCI and ACRC founder, is featured in MatGPT Classroom announcements. UCI researchers and students gain access to the AI platform and industry-relevant materials science data.
• Ohio State UniversitycoreStrategic or Co-development PartnerFEHRMANN MaterialsX partnership with Ohio State University's materials science programs within the MatGPT Classroom initiative, enabling global collaboration between researchers and industry for industrial-scale implementation of academic discoveries.
• Artificial Intelligence Center Hamburg e.V. (ARIC)minorStrategic or Co-development PartnerFEHRMANN partnered with ARIC to co-create the 'AI+M – Innovation Materials with Artificial Intelligence' webinar series, bringing together researchers, futurists, digital experts, and materials scientists to explore the intersection of AI and materials innovation.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/fehrmann-windows

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 FEHRMANN Windows