LEONHARD WEISS BAU AG

What LEONHARD WEISS BAU AG does

LEONHARD WEISS is a fourth-generation family-owned German construction group operating as a general contractor and specialist subcontractor across railway infrastructure, road and civil engineering, energy networks, building construction, and facility management. Founded in 1900 as a track construction firm (Gleisbauunternehmen) by Leonhard Weiß, the company has expanded into a multi-competency infrastructure platform with 15 core service lines — including Bahntechnik, Gleisbau, Straßen- und Tiefbau, Ingenieurhochbau, Schlüsselfertigbau, Netzbau, and Generalunternehmer Freileitungsbau — and 10 wholly-owned subsidiaries spanning asphalt production (AMG), rail engineering inspection (FOCUS RAIL Engineering), electrical energy planning (IHM), noise barriers and roofing (infra-tec), cable channel manufacturing (invatec), rail freight transport (Eisenbahnverkehrsunternehmen), specialist flooring (Fußbodentechnik), cable installation (Rose Kabelmontage), monument restoration (SDC), and traffic safety (VIA Verkehrssicherung). The group is headquartered in Satteldorf, Germany, with secondary offices in Göppingen, and serves clients primarily through public tenders and direct enterprise contracts for projects such as Stuttgart 21 digital node expansion, the SuedLink HVDC corridor, U-Bahn Munich extensions, Ahrtalbahn reconstruction, and Metternich–Erbach overhead line modernization.

Revenue is generated through project-based B2B contracts as either general contractor (Generalunternehmer) or main contractor (Hauptunternehmer) for large-scale infrastructure delivery; pricing is determined through public tender processes and individual contract negotiations rather than published price lists, and long project cycles are typical. The company has invested in Building Information Modeling (BIM) across planning, execution, and facility management to optimize project outcomes and improve interoperability with clients and partners, and is also adopting timber-hybrid construction (Holzhybridbau) as a modern build methodology. Customer orientation is concentrated around public-sector and regulated infrastructure buyers — railway operators and authorities, energy transmission and distribution network operators, municipalities, and commercial property developers — all served through direct enterprise sales, public tenders, and event presence at major industry fairs such as InnoTrans and Karrieretag Familienunternehmen. The company is currently celebrating its 125th anniversary in 2025.

(Note: input data includes a firmographics block referencing 'LEONHARD WEISS BAU AG', year_founded 2001, 5 employees, and a Regensdorf/Switzerland address at leonhard-weiss.ch — this conflicts with the dominant evidence base describing LEONHARD WEISS GmbH & Co. KG as the 125-year-old German family group. The description above reflects the German parent, which is supported by the overwhelming weight of source data.)

Name

LEONHARD WEISS BAU AG

Legal name

LEONHARD WEISS GmbH & Co. KG

Website

https://leonhard-weiss.ch

Company type

Private

Founded year

1900

Operating status

Operating

Headcount range

1–10 employees

Short description

Fourth-generation family-owned German general contractor founded in 1900, delivering railway, road, energy, and building construction through 15 core competencies and 10 wholly-owned subsidiaries, serving public-sector infrastructure buyers and enterprise developers via tenders and direct contracts.

Ownership category

akta.pro rank

Product category

Infrastructure Construction

NAICS

Architectural, Engineering, and Related Services (5413), Engineering Services (541330), Manufacturing (31-33)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), General Bldg Contractors - Nonresidential Bldgs (1540), Construction - Special Trade Contractors (1700), Electrical Work (1731)

akta.pro primary industry

Modular/Offsite General Contracting & Installation (IMAFAAAK)

akta.pro secondary industries

Overhead & Underground Collection System Construction (MV/HV Lines, Duct Banks) (EUAEADAG), Electrical Contracting (Commercial/Industrial) (IMAIABAC)

Keywords

• Railway infrastructure construction
• Civil engineering services
• Track construction
• Turnkey building construction
• Energy network construction

Headquarters

HQ city

Satteldorf

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Infrastructure Construction Projects: LEONHARD WEISS generates revenue through project-based contracts as a general contractor and specialist subcontractor across railway, road, civil engineering, energy, and building construction. Revenue is earned on a per-project basis, with long project cycles typical for infrastructure delivery.
2. Subsidiary Services: Ten wholly-owned subsidiaries provide complementary services including asphalt production (AMG), rail engineering inspection (FOCUS RAIL Engineering), electrical planning (IHM), noise barrier and roofing systems (infra-tec), cable channel systems (invatec), rail freight transport (Eisenbahnverkehrsunternehmen), flooring installation (Fußbodentechnik), cable infrastructure (Rose Kabelmontage), monument restoration (SDC), and traffic safety (VIA Verkehrssicherung). These subsidiaries contribute to the group's revenue through their respective service offerings.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

LEONHARD WEISS BAU AG is a fourth-generation, family-owned general contractor delivering large-scale infrastructure construction services across railway, road, civil engineering, energy networks, and building construction in Germany and internationally. The company operates across 15 core competencies (including Bahntechnik, Gleisbau, Straßen- und Tiefbau, Schlüsselfertigbau, Netzbau, Freileitungsbau and Ingenieurbau) and ten wholly-owned subsidiaries that supply specialized trades such as asphalt production, rail inspection, electrical planning, cable systems, monument restoration, and traffic safety.

Product overview

LEONHARD WEISS BAU AG is a fourth-generation family-owned construction company established in 1900, operating as one of Germany's leading construction firms. The company offers a comprehensive portfolio of 15 core construction services organized into competencies including railway technology (Bahntechnik), track construction (Gleisbau), road and civil engineering (Straßen- und Tiefbau), structural engineering (Ingenieurhochbau/Konstruktiver Ingenieurbau), timber hybrid construction (Holzhybridbau), network construction (Netzbau), overhead line construction, building restoration, facility management, turnkey construction, and project management for infrastructure projects. The company also operates 10 wholly-owned subsidiaries that complement the core construction business: AMG Asphaltmischwerk (asphalt production), FOCUS RAIL Engineering (rail inspection services), IHM (electrical energy planning), infra-tec (noise protection and roof systems), invatec (cable products and steel solutions), LEONHARD WEISS Eisenbahnverkehrsunternehmen (rail freight transport), LEONHARD WEISS Fußbodentechnik (specialist flooring), Rose Kabelmontage (cable installation), SDC (monument restoration), and VIA Verkehrssicherung (traffic safety). The company also employs Building Information Modeling (BIM) as a digital construction methodology across projects. LEONHARD WEISS celebrates its 125th anniversary in 2025, having evolved from its origins as a track construction company into a full-service infrastructure partner.

Differentiator

Problem solved

Functional benefit

Products and services

• Bahntechnik (Railway Technology) Specialized railway technology solutions addressing complex challenges in railway infrastructure construction for rail network development and modernization.
• Gleisbau (Track Construction) Railway track construction services — the founding competency of the company since 1900 — providing innovative and pioneering railway track installation for rail networks.
• Gleisbaumaschinen (Track Construction Machines) Precision track construction work using specialized rail construction machinery for highest-quality rail installation.
• Straßen- und Tiefbau (Road and Civil Engineering) Road construction and civil engineering delivering future-proof infrastructure — economical, sustainable and on schedule for municipal and public clients.
• Ingenieurhochbau / Konstruktiver Ingenieurbau (Structural Engineering) Rapid and economical realization of buildings of all complexities through structural engineering expertise for commercial, industrial and public clients.
• Schlüsselfertigbau (Turnkey Construction) Complete turnkey construction delivery, freeing clients to focus on their core business while LEONHARD WEISS handles the full build.
• Bauen im Bestand (Construction in Existing Buildings) Renovation and modernization of existing buildings, preserving substance while enhancing functionality and comfort.
• Bauwerks-Instandsetzung und Gussasphalt (Building Restoration and Mastic Asphalt) Structural restoration partnerships with focus on building integrity using mastic asphalt for structural repairs and waterproofing.
• Facility Management Future-oriented facility management services for sustainable and value-retentive real estate management across the building lifecycle.
• Generalunternehmer Freileitungsbau (General Contractor Overhead Line Construction) Tailored high-voltage electrical infrastructure solutions, including power transmission lines and overhead line construction for energy transmission operators.
• Netzbau (Network Construction) Construction of secure and stable fiber optic, broadband and utility networks for telecommunications and utility operators.
• Holzhybridbau (Timber Hybrid Construction) State-of-the-art timber-hybrid construction methods executed with precision and efficiency for sustainable building architecture.
• Projektmanagement Infrastrukturprojekte (Infrastructure Project Management) Project management services for road and rail infrastructure projects, bringing decades of concentrated expertise and know-how.
• Internationale Bauprojekte (International Construction Projects) International construction project execution bringing innovation, precision and partnership expertise to shape modern infrastructure and mobility worldwide (illustrated by the Tallinn railway station project).
• Rohstoffe (Raw Materials) Sustainable raw material extraction and processing for highest-quality asphalt and concrete using state-of-the-art technology.
• Building Information Modeling (BIM) Digital construction methodology using 3D modeling and collaborative design processes to optimize planning, execution and management of buildings and infrastructure across the project lifecycle.

Quantifiable outcome

• No quantified metrics publicly disclosed for construction delivery speed, cost savings, or project completion rates.

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• HOCHTIEF AG: Germany's largest publicly listed general contractor, with major activities in transportation infrastructure, energy infrastructure, and building construction. Directly comparable as a prime contractor on large public-sector German infrastructure projects and a benchmark for scale and tender participation.
• PORR AG: Austrian-headquartered European full-service provider for building construction, civil engineering, and infrastructure. Comparable as a German-speaking, family-influenced European contractor pursuing similar public-tender-driven growth.
• Goldbeck GmbH: Privately held German construction company focused on commercial/industrial building construction and related services. Comparable as a family-controlled German contractor competing in non-residential building and adjacent infrastructure work.
• Ed. Züblin AG: Stuttgart-based German general contractor (subsidiary of STRABAG) with deep competence in turnkey building construction, civil engineering, and structural engineering. Comparable head-to-head on German building and infrastructure tenders, including in Baden-Württemberg.
• Max Bögl Stiftung & Co. KG: Privately held German construction and services group active in transportation infrastructure, renewable energy, and building construction. Comparable as a family-owned German infrastructure contractor with integrated manufacturing capabilities and major project roles.
• STRABAG AG: Austrian-headquartered European construction group operating across transportation infrastructure, building construction, and civil engineering. Directly comparable given its multi-country European footprint, public-tender focus, and scale of railway/road project delivery.

Regional players

• Heijmans N.V. Dutch-listed construction and infrastructure company active in roads, civil engineering, and energy infrastructure, primarily in the Netherlands. Comparable on public-tender-driven infrastructure delivery and integrated service models.

Broad incumbents

• Skanska AB: Swedish-headquartered project development and construction group with significant activity in transportation infrastructure and building construction. Comparable as a European peer focused on sustainable construction and public infrastructure delivery.
• VINCI Construction: Global construction subsidiary of VINCI, covering building, civil engineering, and infrastructure concessions. Comparable as a benchmark for mega-project execution capabilities and as a competitor on large international tenders.

Emerging players

• Balfour Beatty plc: UK-listed infrastructure group with strong rail and highways expertise and growing exposure to German and broader European markets. Comparable on railway and energy-infrastructure project profiles.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/leonhard-weiss-bau-ag

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries10 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 LEONHARD WEISS BAU AG