A2SEA

What A2SEA does

A2SEA, headquartered in Fredericia, Denmark and founded in 2000, provides offshore wind transport, installation, and service solutions across Europe. Its core offering is the execution of EPCI scopes for offshore wind farms, covering foundations (including large/XL diameter piles, gravity-based foundations, and suction pile anchors through subsidiary SPT Offshore), wind turbine generator installation, inter-array and export power cables, substations, and associated geosciences and landfall construction. The company serves offshore wind farm developers and oil & gas operators, with documented projects across the UK, Belgium, the Netherlands, Germany, and Norway. A2SEA differentiates through a high-tech, versatile fleet of specialized vessels, including DP2/DEM3 installation and heavy lift jack-up vessels, the DP3 Living Stone cable installation vessel (10,000-tonne capacity with a dual-lane cable system), CBT 1100 trenching tools, XL offshore subsea drills, and DP2 fallpipe vessels capable of rock placement at depths exceeding 2,000 meters.

The business model is project-based services revenue, charging for vessel-based installation campaigns under multi-year offshore wind and oil & gas contracts; the company reports an unrivalled track record of more than 2,700 wind turbine generators installed, plus landmark projects including the 467 km Hornsea One export cables (longest AC offshore wind export cable ever) and the Modular Offshore Grid 85 km submarine power cable project delivered ahead of schedule. Operations are supported by wholly-owned subsidiary SPT Offshore (suction pile anchors and foundations), industry memberships such as the WindEurope Floating Offshore Wind Committee, and consortium participation (MPVAqua for floating offshore PV, Hywind Tampen FEED with Equinor). The input data exhibits material conflation with DEME Group, including DEME's social media profiles, investor relations URL, and Belgium headquarters; A2SEA's exact current ownership and revenue figures are not disclosed in the available sources.

Name

A2SEA

Legal name

DEME Group

Website

https://a2sea.com

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

251–500 employees

Short description

A2SEA, based in Fredericia, Denmark, provides offshore wind transport and installation services — including foundations, turbines, inter-array and export cables, and substations — to offshore wind developers and oil & gas operators across Europe using a fleet of specialized DP2/DP3 vessels.

Ownership category

akta.pro rank

Product category

Offshore Wind Installation Services

NAICS

Support Activities for Water Transportation (4883), Ship Building and Repairing (336611), Other Support Activities for Water Transportation (48839)

SIC

Oil & Gas Field Services, Nec (1389), Water Transportation (4400), Construction Machinery & Equip (3531)

akta.pro primary industry

Marine & Offshore Wind BOP Construction (Foundations, Cables, Ports, Installation Support) (EUAMAFAI)

akta.pro secondary industries

Offshore Wind & Renewable Support Vessel Construction (SOV, CTV, WTIV) (IMAJACAG), Offshore Wind Substructures & Marine Engineering (Monopiles, Jackets, Floating) (EUAMACAE), Subsea Construction & IMR Vessel Newbuilds (CSV, DSV, ROV Support) (IMAJACAD), Offshore Marine & Aviation Support (PSVs, AHTS, Crew Boats, Helicopters) (EUALABAJ)

Keywords

• Offshore wind installation
• Wind turbine transport
• Submarine cable laying
• Offshore vessel services
• Marine foundation installation

Headquarters

HQ city

Fredericia

HQ country

Denmark

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Infrastructure, Personnel, Technology or R&D

Distribution channels1 record

Marketing channels3 records

Core offering

A2SEA provides offshore wind transport, installation and service solutions for offshore wind farm projects. The company operates a specialized fleet of vessels to transport and install foundations, wind turbines, inter-array cables, export cables and substations at sea, delivering turnkey EPCI capabilities from initial seabed preparation through final cable termination and testing.

Product overview

No product information available for A2SEA in the provided source data.

Differentiator

Problem solved

Functional benefit

Products and services

• Foundation Installation Services Transport and installation of foundations for offshore wind farms, including large and XL diameter piles using drilling and hammering equipment, gravity based foundations with soft soil improvement, and suction pile anchors and foundations. Services cover construction of jetties, mooring facilities, quay walls and bridges.
• Power Cable and Umbilical Installation Supply and installation of high voltage submarine power cables for infield cable networks at windfarms, export cable connections between windfarm and shore, and interconnectors between countries. Includes cable supply, accessories, cable protection systems, seabed clearance, route preparation, pre-lay dredging, trenching, cable laying, post-lay burial, protection of crossings, landfall construction, termination and testing.
• Wind Turbine Generator (WTG) Installation Installation of offshore wind turbines of all types and sizes, including next generation mega turbines, performed using specialist installation vessels for some of the largest wind farms in the industry, including those furthest from shore and in deepest waters. More than 2,700 WTGs have been installed to date.
• Substation Installation Installation of offshore substations as part of turnkey EPCI wind farm project execution, performed using the company's specialist installation vessels alongside turbine and cable installation.
• Geoscience Services Full package of geoscience services for renewables and oil & gas sectors including offshore geotechnical and geological site investigations, geophysical marine and environmental surveys, deep-sea engineering services, integrated studies, and seabed clearance campaigns for Unexploded Ordnance, wrecks, cables and boulders.
• Landfall Construction Construction of landfalls for installation of offshore pipelines, cables and umbilicals, including civil works executed globally for major pipe-laying contractors and operators, managing the entire specialized construction process from start to finish.
• Oil & Gas Offshore Installation and Decommissioning Offshore installation and decommissioning services for the oil and gas industry, including landfalls and civil works, rock placement, heavy lift, umbilicals installation.

Quantifiable outcome

• More than 2,700 wind turbine generators of all types and sizes successfully installed
• +2 more outcomes

Named customers9 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Five partnerships are on record, tiered core, flagship and minor.

• Equinor ASAcoreStrategic or Co-development PartnerDEME performed front-end engineering and design (FEED) study on the Hywind Tampen project in Norway, consisting of 11 floating concrete spar foundations. The scope included developing and optimizing design and construction methodology for foundations, including secondary steel outfitting, mooring arrangement and project execution strategy for floating offshore wind.
• MPVAqua ConsortiumflagshipStrategic or Co-development PartnerPart of the MPVAqua consortium developing a cost-competitive concept for floater structures to support large, offshore floating PV solutions in Belgium. This represents pioneering work in floating offshore wind technology.
• SPT OffshorecoreStrategic or Co-development PartnerSubsidiary specializing in suction pile anchors and foundations. Suction pile technology offers silent and vibration-free installation, eliminating expensive noise mitigation measures and reducing vessel time offshore, thereby reducing CO2 and NOx emissions. Particularly valuable for floating offshore wind industry.
• WindEurope FOW CommitteeminorGTM or Marketing PartnerMembership in WindEurope Floating Offshore Wind Committee for industry engagement and positioning in the emerging FOW sector.
• Jan De Nul GroupminorOthersMentioned as a market player in the offshore wind turbine installation vessel market, competing for similar projects and market share in the growing offshore wind installation sector.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Heerema Marine Contractors: Dutch offshore heavy-lift and subsea construction company with semi-submersible crane vessels serving offshore wind foundation installation and oil & gas platform removal/decommissioning markets.
• McDermott International: Global offshore EPCI provider with pipelay, heavy-lift, and subsea construction vessels serving offshore wind and oil & gas developers, with growing European offshore wind exposure.
• Jan De Nul Group: Belgian-based offshore contractor operating a comparable fleet of jack-up, cable-laying, and rock-placement vessels for offshore wind installation and subsea cable projects across Europe; explicitly named as a market competitor in the source data.
• Boskalis: Dutch dredging and offshore services major with offshore wind installation, cable lay, and seabed preparation capabilities directly overlapping with DEME's offshore EPCI scope.
• Seaway 7: Dedicated offshore wind EPCI contractor (Subsea 7 carve-out) focused on transport, installation, and maintenance of bottom-fixed offshore wind foundations and cables; competes directly for European offshore wind installation contracts.
• Subsea 7: Global subsea construction contractor with cable lay, pipelay, and heavy-lift capabilities serving both offshore wind inter-array/export cable installation and oil & gas developments.
• Van Oord: Dutch marine contractor with a dedicated offshore wind fleet (Aeolus, MPI Resolution) providing foundation, cable, and turbine installation services across the same European offshore wind customer base.
• Saipem: Italian offshore EPCI contractor operating heavy-lift, pipelay, and subsea construction vessels serving both oil & gas and offshore wind installation customers globally.
• Cadeler: Pure-play wind turbine installation vessel operator (formerly Swire Blue Ocean / Eneti) operating next-generation WTIVs for foundation and turbine installation; competes head-to-head for offshore wind installation tenders.

Emerging players

• ZPMC: Chinese heavy marine equipment manufacturer increasingly entering offshore wind installation vessel and foundation supply markets; represents a lower-cost emerging competitor in the global offshore wind supply chain.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/user/DEMEGroup
• Facebookfacebook.com/DEMEgroup
• LinkedInlinkedin.com/company/72297
• Instagraminstagram.com/demegroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 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 A2SEA