Allseas Group
Allseas Group is a Swiss-Dutch privately-held offshore energy contractor delivering subsea pipelay, platform decommissioning via single-lift heavy-lift, platform transportation and installation, polymetallic nodule collection, and Small Modular Reactor development for global energy operators.
- Company typePrivate
- Founded1986
- HeadquartersChâtel-saint-denis, Switzerland
- Headcount1,001–5,000
- GTM typeB2B
- OfferingServices
What Allseas Group does
Allseas Group is a Swiss-Dutch privately-held offshore energy contractor founded in 1986, headquartered in Châtel-Saint-Denis, Switzerland, with 1,001-5,000 employees and a global operating footprint spanning Europe, North Sea, Southeast Asia, East Asia, South America, North America, Oceania, and the Pacific Ocean. The company delivers engineering, procurement, construction, and installation (EPCI) services to major energy operators across four core activities: offshore pipelay for natural gas, oil, and carbon capture applications; platform decommissioning via single-lift removal of the heaviest offshore facilities; platform transportation and installation for large offshore structures; and polymetallic nodule collection from the ocean floor at depths exceeding 4 kilometers. A fifth emerging activity is Small Modular Reactor (SMR) development based on high-temperature gas-cooled reactor technology targeting 25-MWe units for integration into offshore vessels and onshore industry by 2030.
The company operates a fleet of specialized vessels led by the Pioneering Spirit, the world's largest and most versatile construction vessel, and the Hidden Gem, the world's first deep-sea mineral production vessel; additional vessels include Solitaire, Audacia, Fortitude, and Lorelay (the latter marking 40 years of operations in 2026). Allseas' proprietary technology stack combines single-lift heavy-lift capability, deep-water pipelay systems, a seabed-to-surface nodule collection architecture (validated by a 2022 pilot lifting 3,000 tonnes), and Triso-fuel-based SMR concepts developed with NRG PALLAS and TU Delft. Over its history, the company has completed more than 340 projects and installed approximately 30,000 kilometers of subsea pipeline worldwide, including landmark deepwater developments such as the Malampaya gas field (Philippines, 2000), Nord Stream (2011), and Polarled (Norway, 2015).
Revenue is generated through project-based B2B contracts negotiated directly with enterprise energy customers on a competitive-bid basis, including oil and gas operators, offshore wind developers, natural gas developers, and deep-sea mining companies. The go-to-market motion is direct enterprise field sales with no intermediaries or resellers. Reported customer relationships include ExxonMobil/Esso Australia (Bass Strait decommissioning — Australia's largest offshore decommissioning campaign), Prime Energy Resources Development (Malampaya Phase 4), and The Metals Company (commercial nodule collection development). Financial figures are not publicly disclosed. Strategic growth vectors are deep-sea mining (commercial commissioning targeted Q4 2027) and SMR nuclear technology (first reactors targeted by 2030), representing material diversification beyond traditional oil & gas contracting.
Allseas Group firmographics
Firmographics- Name
- Allseas Group
- Legal name
- Allseas Group
- Website
- https://allseas.com
- Company type
- Private
- Founded year
- 1986
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- Allseas Group is a Swiss-Dutch privately-held offshore energy contractor delivering subsea pipelay, platform decommissioning via single-lift heavy-lift, platform transportation and installation, polymetallic nodule collection, and Small Modular Reactor development for global energy operators.
- Ownership category
- akta.pro rank
Allseas Group industry classification
Industry- Product category
- Offshore Engineering and Construction Services
- NAICS
- Ship Building and Repairing (336611), Support Activities for Water Transportation (4883), Oil and Gas Field Machinery and Equipment Manufacturing (333132)
- SIC
- Ship & Boat Building & Repairing (3730), Oil & Gas Field Machinery & Equipment (3533)
- akta.pro primary industry
- Pipe-lay & Heavy-lift Offshore Vessel Construction (IMAJACAE)
- akta.pro secondary industries
- Underwater Inspection, Maintenance & Repair (UWILD, Diving/ROV, In-water Cleaning) (IMAJAFAJ), Underwater Hull Services (Diving, In-Water Cleaning, Propeller Polishing, Inspection) (TLAHAMAL)
Keywords
Where Allseas Group is headquartered
LocationHeadquarters
- HQ city
- Châtel-saint-denis
- HQ country
- Switzerland
- HQ region
- Europe
Offices1 record
Markets served
Allseas Group business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Infrastructure, Operations, Personnel, Technology or R&D, Supply Chain
Revenue model
- Offshore Pipelay Services: Project-based revenue from engineering, procurement, construction, and installation (EPCI) of subsea pipeline systems for oil and gas operators globally.
- Platform Decommissioning: Single-lift removal and transport services for offshore platform decommissioning, including recycling of offshore structures with over 95% recycling targets.
- Platform Transportation and Installation: Heavy-lift transport and installation services for offshore platforms and substations, leveraging the Pioneering Spirit vessel.
- Deep-Sea Mining Operations: Commercial polymetallic nodule collection system development and operation for The Metals Company, with Allseas funding a significant portion of development costs recoverable through production revenues. Commissioning expected Q4 2027.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Allseas Group product offering
Product offeringCore offering
Allseas Group is a Swiss-Dutch offshore energy contractor delivering integrated engineering, procurement, construction, and installation (EPCI) services. Core offerings include deepwater subsea pipeline installation, single-lift removal and installation of offshore platforms, heavy-lift transportation, and polymetallic nodule collection from the seafloor. The company also develops Small Modular Reactor (SMR) technology for offshore vessel propulsion and onshore power generation.
Product overview
Allseas Group is a Swiss-Dutch offshore energy contractor delivering integrated engineering and construction solutions. The company operates a fleet of specialized vessels led by Pioneering Spirit (the world's largest construction vessel) and Hidden Gem (the first deep-sea mineral production vessel). Core services include offshore pipelay, platform decommissioning via single-lift technology, platform transportation and installation, and polymetallic nodule collection from ocean depths exceeding 4 km. The company is also developing Small Modular Reactor (SMR) technology based on high-temperature gas-cooled reactors for maritime and onshore power generation.
Differentiator
Problem solved
Functional benefit
Brands
- Hidden Gem: The world's first deep-sea mineral production vessel with seabed-to-surface nodule collection and transport systems.
- Pioneering Spirit
- Solitaire
- Audacia
- Lorelay
- Fortitude
Products and services
- Offshore Pipelay
- Platform Decommissioning
- Platform Transportation and Installation
- Polymetallic Nodule Collection
- Nuclear (Small Modular Reactor Technology)
Quantifiable outcome
- Over 95% recycling rate for offshore structure decommissioning
- +2 more outcomes
Companies that use Allseas Group
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles4 records
Allseas Group technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Allseas Group partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core and minor.
- The Metals Company (TMC)coreAllseas signed a Contract for Development Work and Commercial Production with TMC to develop, commission, and operate the world's first commercial nodule collection system in the Clarion Clipperton Zone of the Pacific Ocean. The system will have 3.0 million wet tonnes per annum capacity with commissioning expected Q4 2027. Allseas funds significant development costs recoverable through production revenues.
- NRG PALLAScorePartnership for development of Small Modular Reactor (SMR) technology based on high-temperature gas-cooled reactor technology, targeting first operational reactors by 2030.
- TU DelftcoreAcademic partnership for development of Small Modular Reactor (SMR) technology, contributing research and engineering expertise to the nuclear power initiative.
- Roland BergerminorConsultancy commissioned to conduct impact study on SMR technology, projecting €130 billion contribution to Dutch economy by 2050 and 35,000-40,000 new jobs.
- MammoetminorCollaboration on North Sea decommissioning projects, combining Allseas' Pioneering Spirit vessel with Mammoet's skidding and load-in operations for integrated platform removal.
Scale indicators7 records
Recent moves6 records
Expansion highlights6 records
Allseas Group competitors and assessment
Company assessmentDirect peers
- Subsea 7: Subsea 7 is a global leader in subsea engineering, construction, and pipelay services for the offshore energy industry. Direct competitor to Allseas in deepwater pipelay and SURF (subsea, umbilicals, risers, flowlines) contracts with the same IOC customer base.
- Saipem: Saipem is a major Italian offshore EPCI contractor with deepwater pipelay, heavy-lift, and platform installation capabilities. Competes with Allseas for offshore pipeline and platform installation tenders globally.
- TechnipFMC: TechnipFMC is a leading subsea engineering and construction company serving oil and gas operators with EPCI capabilities for pipelines, umbilicals, and subsea production systems. Direct peer in subsea pipelay and integrated project execution.
- McDermott: McDermott delivers offshore engineering, procurement, construction, and installation services for the energy industry. Competes with Allseas on large offshore EPCI tenders, including platform installation and pipelay projects.
- Heerema Marine Contractors: Heerema is a Dutch-based marine contractor specializing in transport, installation, and removal of offshore structures. A direct peer in heavy-lift offshore construction with shared Dutch heritage and overlapping customer relationships in decommissioning and platform installation.
- Van Oord: Van Oord is a Dutch marine contractor active in offshore wind, dredging, and offshore oil and gas services. Comparable to Allseas in the offshore wind installation market and North Sea operations.
- Royal Boskalis Westminster: Boskalis is a Dutch global marine services company providing offshore energy, dredging, and maritime services. Competes with Allseas in offshore construction, heavy-lift, and subsea installation, particularly in the North Sea and offshore wind.
- DEME Group: DEME is a Belgian marine contractor specializing in dredging, offshore energy, and marine infrastructure. Comparable to Allseas in offshore wind installation, cable laying, and offshore construction projects in Europe.
Emerging players
- Helix Energy Solutions: Helix provides offshore well intervention and decommissioning services to the oil and gas industry. Comparable niche overlap with Allseas in platform decommissioning, particularly in the Gulf of Mexico, though more focused on well P&A operations.
- Oceaneering International: Oceaneering provides subsea engineering, ROV operations, and offshore intervention services globally. Partial overlap with Allseas in subsea construction support services and offshore project execution.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Allseas Group social profiles
Digital presenceAllseas Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
Allseas Group leadership team
Management profileNumber of profiles
Profiles1 record
Allseas Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Allseas Group M&A and investment
M&A and investmentM&A1 record
Investments1 record
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Allseas Group
What does Allseas Group do?
Allseas Group is a Swiss-Dutch offshore energy contractor delivering integrated engineering, procurement, construction, and installation (EPCI) services. Core offerings include deepwater subsea pipeline installation, single-lift removal and installation of offshore platforms, heavy-lift transportation, and polymetallic nodule collection from the seafloor. The company also develops Small Modular Reactor (SMR) technology for offshore vessel propulsion and onshore power generation.
Is Allseas Group a public or private company?
Allseas Group is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Allseas Group founded?
Allseas Group was founded in 1986. It employs 1,001 to 5,000 people.
Where is Allseas Group based?
Allseas Group is headquartered in Châtel-saint-denis, Switzerland, in the Europe region.
How does Allseas Group make money?
Four revenue lines are on record. Offshore Pipelay Services are the primary driver. The others are platform Decommissioning, platform Transportation and Installation and deep-Sea Mining Operations.
Who are Allseas Group's main competitors?
Direct peers on record are Subsea 7, Saipem, TechnipFMC, McDermott, Heerema Marine Contractors, Van Oord, Royal Boskalis Westminster and DEME Group. Emerging players are Helix Energy Solutions and Oceaneering International.
Does Allseas Group have an API?
No public API is recorded for Allseas Group.
What industry is Allseas Group in?
Allseas Group's product category is Offshore Engineering and Construction Services. Its primary akta.pro industry code is IMAJACAE, Pipe-lay & Heavy-lift Offshore Vessel Construction, with a secondary code of IMAJAFAJ, Underwater Inspection, Maintenance & Repair (UWILD, Diving/ROV, In-water Cleaning). Its NAICS code is 336611 and its SIC code is 3730.