AEPLI Stahlbau

What AEPLI Stahlbau does

AEPLI Stahlbau AG is a Swiss steel construction firm headquartered in Gossau, St. Gallen, founded in 1913 and now in its fourth generation of family ownership (Sandro Aepli assumed leadership in 2022). The company executes the full value chain for structural steelwork — from static/conceptual engineering through fabrication, surface coating, and on-site assembly — operating from a 7,500 m² production hall backed by 4,000 m² of storage and ~25-30 employees. It holds EN 1090 EXC4 certification (the highest execution class), ISO 9001, and ISO 3834-2, qualifying it for safety-critical, high-load applications including bridges, airport infrastructure, and large public buildings.

The firm's revenue model is project-based B2B contracting, with reference projects including Zurich Airport Dock B (>2,000 tons), Messe Basel (10,950 tons), ETH Zurich research infrastructure (1,200 tons), and industrial assignments for Roche, SBB, and Metrohm. Annual steel throughput is approximately 8,800 tons, with a 610 kW on-site photovoltaic system providing partial energy self-sufficiency. Customer engagement is national and concentrated on Swiss enterprise, public-sector, and infrastructure clients; the company explicitly positions itself as a "nationally operating" steel construction provider.

Operationally, AEPLI combines regulated execution capability (EXC4, EN 9606-1 certified welders), a vertically integrated facility, and a 90% in-house apprenticeship rate to maintain craft capacity. Recent capital deployment has gone into production capacity (2025 saw/drilling center) and energy infrastructure (2011 solar system), while governance was formalized through a 2008 conversion to Aktiengesellschaft status. The business model is best characterized as a high-craft, low-headcount specialty contractor with strong regulatory credentials but limited scale relative to large European steel construction peers.

Name

AEPLI Stahlbau

Legal name

AEPLI Stahlbau AG

Website

https://aepli-stahlbau.ch

Company type

Private

Founded year

1913

Operating status

Operating

Headcount range

11–50 employees

Short description

AEPLI Stahlbau AG is a Swiss family-owned (4th generation) steel construction firm in Gossau executing the full value chain — engineering, fabrication, coating, and assembly — for bridge, airport, industrial, and public infrastructure clients across Switzerland, holding EN 1090 EXC4 certification.

Ownership category

akta.pro rank

Product category

Structural Steel Construction

NAICS

Fabricated Structural Metal Manufacturing (332312), Prefabricated Metal Building and Component Manufacturing (332311), Plate Work and Fabricated Structural Product Manufacturing (33231)

SIC

Fabricated Structural Metal Products (3440), Prefabricated Metal Buildings & Components (3448)

akta.pro primary industry

Structural Steel Fabrication (IMADACAA)

akta.pro secondary industries

Steel Plate, Sections & Welded Assemblies (IMADACAD), Metals & Steel Mill Facility Construction (IMAFADAF)

Keywords

• Steel construction services
• Structural steel fabrication
• Bridge construction
• Industrial hall construction
• Corrosion protection coating

Headquarters

HQ city

Gossau

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Custom Steel Construction Projects: One-time project-based fees for custom steel structures, including bridges, industrial halls, and specialized components. Revenue generated from design, fabrication, delivery, and/or assembly services depending on project scope. No recurring or subscription components.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

AEPLI Stahlbau AG designs, fabricates, and assembles custom steel structures for industrial, commercial, and infrastructure clients across Switzerland. Services span the full value chain — from static structural design, sawing/burning/drilling/welding fabrication, in-house surface treatment (shot blasting and wet lacquering, C1–C5), to final on-site assembly — delivered from a single facility in Gossau SG with 8,800 m² of production space and 4,000 m² of storage.

Product overview

AEPLI Stahlbau AG is a Swiss steel construction company offering a comprehensive portfolio of steel construction services. The company provides four core service lines: Stahlbau & Hallenbau (steel construction and industrial halls), Brückenbau (bridge construction), Industriestahlbau (industrial steel construction for custom components), and Oberflächenbeschichtung (surface coating/corrosion protection). The company operates from their production facility in Gossau SG, with 7,500 m² of production hall space and 4,000 m² of storage capacity. They handle the complete value chain from static design to final on-site assembly, certified according to EN 1090 EXC4. Approximately 95% of their steel products receive surface treatment for corrosion protection.

Differentiator

Problem solved

Functional benefit

Products and services

• Steel Construction & Industrial Halls (Stahlbau & Hallenbau) Classical steel construction for industrial halls, parking structures, and large-scale building projects. Includes the entire value chain from static concept to on-site assembly, certified per EN 1090 EXC 1-4.
• Bridge Construction (Brückenbau) Steel bridge construction including pedestrian bridges, footbridges, and spanning structures, supported by 7,500 m² of production hall and 4,000 m² of storage enabling large-span work.
• Industrial Steel Construction (Industriestahlbau) Custom steel components for industrial applications — machine stands, fillers, complex geometries — produced as single pieces or small series to customer specifications.
• Surface Coating / Corrosion Protection (Oberflächenbeschichtung) In-house surface treatment covering approximately 95% of products: shot blasting (SA2.5–SA3, RZ 65μ) and continuous wet lacquering from 05:00–23:00, applying C1–C5 corrosion protection per EN ISO 12944 & ISO 8501-1. Accepts objects up to 2.50m width × 0.8m height regardless of length.

Quantifiable outcome

• 7,500 m² production area and 4,000 m² storage enabling efficient logistics for bridge and large-span projects
• +3 more outcomes

Named customers19 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered minor.

• Porsche Zentrum RotkreuzminorOthersProject customer for Aufstockung (vertical extension) — 2 floors on existing building plus drivable ramp. 450 to. AEPLI performed planning, fabrication, delivery, and assembly.
• CC Aligro WangsminorOthersProject customer for supermarket new construction including building structure, parking canopy, and 2 canopies. 630 to.

Scale indicators5 records

Recent moves7 records

Expansion highlights3 records

Direct peers

• Tuchschmid AG: Swiss steel construction company specializing in steel structures, industrial halls and architectural metalwork, with comparable in-house engineering-to-assembly capabilities and similar customer segments.
• Waagner-Biro Stahlbau GmbH: Austrian specialist in steel bridges, complex steel structures and stage engineering; competes in the same EN 1090 EXC-class large-project segment that AEPLI targets in Switzerland.
• Donges SteelTec GmbH: German structural steel fabricator with comparable EN 1090 execution capabilities, producing bridges, halls, and industrial steelwork for similar enterprise customers across Europe.
• Müller Stahlbau GmbH: German structural steel fabricator serving similar industrial, commercial and infrastructure clients, with comparable design-fabrication-assembly model and EN 1090 execution capabilities.
• Haslinger Stahlbau GmbH: Austrian steel construction company offering comparable design-fabrication-assembly services for bridges, halls and industrial steel structures, with EN 1090 capabilities and similar mid-size operational profile.
• Marti Technik AG: Swiss steel and special construction firm operating within the Marti Group, providing comparable structural steelwork and complex steel fabrication for infrastructure and industrial projects.
• Zwahlen & Mayr SA: Swiss steel and bridge construction firm with comparable national footprint, executing structural steelwork, bridges and industrial halls for similar enterprise clients across Switzerland.
• BEMO Systems GmbH: Austrian/German steel construction firm specialising in prefabricated steel building envelopes, halls, and modular steel structures for industrial and commercial applications.
• Pletscher Metallbau AG: Swiss metal/steel construction firm with comparable scope in structural steelwork, industrial halls, and architectural metalwork across the Swiss market.

Broad incumbents

• Implenia AG: Switzerland's largest construction and real estate services group, with in-house structural steel and bridge construction capabilities as part of a broader portfolio of general contractor services.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/aepli-stahlbau-ag

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

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 AEPLI Stahlbau