What ACO Severin Ahlmann does

ACO Severin Ahlmann is a German family-owned industrial company founded in 1946, headquartered in Büdelsdorf, that designs, manufactures, and distributes water management and drainage solutions for infrastructure, building, and environmental applications. The company's product portfolio is organized around the ACO WaterCycle concept, an integrated system approach spanning collection, cleaning, storage, and reuse of water, and includes linear and point drainage channels (e.g., DrainBox), building drainage systems (ACO Haustechnik, ShowerDrain S+), cast iron products (ACO Guss), concrete products (ACO Beton, Betonwerk Neu-Ulm), specialty manhole covers (ACO Passavant Detego), grease and oil separators (Aquafix Milieu, Hygiene First line), and airport, sport, and marine drainage solutions (ACO Marine, ACO Sport). Its proprietary ACO WaterDome is an interactive experience and education space deployed at trade events and the Kiel partnership with Ocean Race Europe. Production is concentrated across at least eight German facilities in Büdelsdorf/Rendsburg, Reith, Philippsthal, Dermbach, Aarbergen, Kaiserslautern, Bürstadt, and Mülheim-Kärlich, with additional international manufacturing and assembly operations.

ACO generates revenue primarily through B2B hardware sales (drainage systems, rainwater management solutions, grease separators, cast iron and concrete components) to municipalities, construction firms, architects, engineers, and industrial clients, supplemented by professional services including engineering consultation, custom system design, and implementation support for large infrastructure projects. Pricing is quote-based and not publicly disclosed, consistent with project-driven industrial B2B sales. The go-to-market combines direct enterprise sales through wholly-owned regional subsidiaries in key markets (Germany, USA, China, UAE, Spain, Scandinavia, Australia, and others) with channel partners and distributors in regions without direct presence (parts of Africa, Asia, South America). The company operates dedicated sales divisions — ACO Tiefbau (civil engineering), ACO Haustechnik (building technology), ACO Guss (cast iron), ACO Beton (concrete), ACO Detego, and ACO Selbstbau (self-build) — each targeting specific customer segments.

The company is in its third generation of family ownership, led by managing shareholders Hans-Julius and Iver Ahlmann, and was converted to a Societas Europaea (SE) legal form on December 10, 2021. ACO employs approximately 5,000 people worldwide and serves customers across more than 50 countries through a network of regional subsidiaries and distribution partners. Recent strategic activity includes the acquisitions of Betonwerk Neu-Ulm (2023), LIMATEC (January 2025), and ENREGIS Climate Group (May 2026), alongside failed merger plans with BIRCO GmbH blocked by the Bundeskartellamt in January 2022.

Name

ACO Severin Ahlmann

Legal name

ACO Ahlmann SE & Co. KG

Website

https://aco.com

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

ACO Severin Ahlmann is a German family-owned industrial manufacturer founded in 1946 that designs and distributes drainage and water management solutions, including the integrated ACO WaterCycle system, for municipalities, construction firms, architects, and industrial clients across more than 50 countries.

Ownership category

akta.pro rank

Product category

Drainage and Water Management Systems

NAICS

Water Supply and Irrigation Systems (22131), Water Supply and Irrigation Systems (221310), Sewage Treatment Facilities (221320), Sewage Treatment Facilities (22132), Administration of Air and Water Resource and Solid Waste Management Programs (924110)

SIC

Water Supply (4941), Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Sanitary Services (4950), Electric, Gas & Sanitary Services (4900), Pumps & Pumping Equipment (3561)

akta.pro primary industry

Water Supply & Wastewater Utilities Administration (BPAIACAG)

akta.pro secondary industries

Water Reuse & Reclamation Infrastructure Construction (Recycled Water Systems) (IMAFAGAH), Plumbing & Utility Systems (Potable/Non-Potable Water, Sanitary, Storm, Sewage Lift) (EUAEAFAF)

Keywords

• Drainage systems
• Stormwater management
• Wastewater treatment
• Rainwater harvesting
• Water infrastructure solutions

Headquarters

HQ city

Büdelsdorf

HQ country

Germany

HQ region

Europe

Offices24 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Water Management Products: Sale of drainage systems, rainwater management solutions, grease separators, cast iron products, and related water infrastructure components to municipalities, construction companies, and industrial clients
2. Professional Services: Engineering consultation, custom system design, and implementation support for large infrastructure projects
3. Building Technology Systems: Products and services for building infrastructure including sanitation, hygiene systems, and technical building equipment through ACO WaterTech Systems division

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

ACO Severin Ahlmann manufactures and distributes drainage products, water management systems, and infrastructure components for collecting, cleaning, storing, and reusing water. The portfolio includes linear and point drainage channels, grease and oil separators, manhole covers, cast iron products, shower and bathroom drainage systems, and specialized solutions for airports, sports facilities, marine applications, and livestock buildings. ACO also provides engineering consultation, custom system design, and implementation support for municipal and large-scale infrastructure projects.

Product overview

ACO Severin Ahlmann is a leading international provider of water management and drainage solutions. The company's product portfolio centers on the ACO WaterCycle, a holistic system integrating solutions for collecting, cleaning, storing, and reusing water. Core product lines include linear and point drainage systems (ACO Drain Box, awarded the GaLaBau Innovation Medal), building technology drainage (ACO Haustechnik with products like the ACO ShowerDrain S+), and infrastructure solutions such as manhole covers (ACO Passavant Detego, supplying floor gates for Stuttgart 21) and cast iron products (ACO Guss). The company also offers specialized solutions for airports, sports facilities, maritime applications, and hygiene-critical environments (Hygiene First). Notable recent product innovations include the iF Design Award-winning ClimateBoxx and WaterDome interactive education platform. ACO has pursued an active acquisition strategy, integrating Aquafix Milieu (Netherlands' largest separator manufacturer), Betonwerk Neu-Ulm (concrete products), and ENREGIS Climate Group (climate solutions acquired May 2026). The company operates across over 50 countries with a focus on climate-resilient city planning and sustainable rainwater management.

Differentiator

Problem solved

Functional benefit

Products and services

• ACO WaterCycle

Quantifiable outcome

• ACO WaterCycle enables cities to manage extreme weather events through integrated rainwater collection, treatment, storage and reuse systems
• +1 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• ENREGIS Climate GroupcoreStrategic or Co-development Partner · 31 May 2026Strategic acquisition completed on May 31, 2026, expanding ACO's expertise in Green City solutions and strengthening the holistic rainwater management service portfolio.
• RECOVER (Interreg Project)minorStrategic or Co-development PartnerNetwork partner in the Interreg project led by GEOMAR developing a digital twin of the southwestern Baltic Sea. ACO contributes expertise and resources to achieve project goals for improving the Baltic Sea environmental condition.
• LIMATECcoreStrategic or Co-development PartnerIntegration of LIMATEC, a leading French specialist in stainless steel drainage systems, combining technological innovation and decades of expertise to advance sustainable water management solutions.
• NordArtminorGTM or Marketing PartnerACO hosts the annual NordArt international art exhibition at its Carlshütte venue, featuring approximately 200 artists from various nations in one of Europe's largest annual contemporary art exhibitions. Hans-Julius and Johanna Ahlmann serve as main sponsors.
• Musto Skiff World ChampionshipsminorGTM or Marketing PartnerTitle sponsor of the Musto Skiff World Championships for over a decade. The event showcases ACO brand globally through association with high-performance sailing.
• Ocean Race EuropeminorGTM or Marketing PartnerHost City Premium Partner of Ocean Race Europe 2025 in Kiel, bringing the ACO WaterDome to the event location for brand visibility and water awareness education.
• datenschutz nord GmbHminorOthersExternal data protection officer provider for GDPR compliance and privacy advisory services.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Market position

Weaknesses5 records

Competitive moat5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries46 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ACO Severin Ahlmann