Sevan Marine ASA
Sevan Deepwater Technology is a Bergen-based offshore engineering and design house providing patented cylindrical hull and semi-submersible floating platforms, plus digital mooring monitoring, to enterprise oil and gas and renewable energy operators. It operates as a fully owned subsidiary of Seatrium.
- Company typePrivate
- Founded2001
- HeadquartersBergen, Norway
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Sevan Marine ASA does
Sevan Deepwater Technology (formerly Sevan Marine ASA) is a Norwegian engineering and design house specializing in floating offshore solutions for the oil and gas and renewable energy sectors. Founded in 2001 and headquartered in Bergen, Norway, the company pioneered the patented double-symmetric cylindrical hull as a cost-efficient alternative to traditional ship-shaped and semi-submersible floating designs. Its core technology portfolio covers the cylindrical hull and the semi-submersible platform (launched as the Semi FPU concept in September 2025), supported by an in-house digitalization platform called Inquire that delivers mooring integrity monitoring services using numerical models and sensor data. The company has 75 years of combined operational experience, has delivered 12 cylindrical units globally (including 6 FPSOs, 4 drilling units, and 2 accommodation units), and has accumulated more than 1,000 model-scale tests validating its technology.
The company's product line spans floating production systems (FPSO, FSO, FLNG, FLSC), drilling units, accommodation platforms, floating offshore wind substations, and consultancy services covering concept, design, execution, and decommissioning. The Inquire digital platform provides continuous monitoring of mooring tension, offsets, accumulated fatigue damage, and chain link history, and is deployed on the Penguins FPSO. The neXt service line extends the offering into decarbonization and new energy applications. Cylindrical hull IP is protected through an internationally renewed patent portfolio covering key features, geometries, and functional principles.
Sevan Deepwater Technology operates as a fully owned subsidiary of Seatrium (formed via SembCorp's integration of Sevan in 2018 and subsequent combination with SSP Offshore), which provides global yard and supply-chain capacity and a single accountable counterparty from concept through EPC. The business model combines professional services (engineering, design, consultancy, mooring and marine operations), technology licensing of the cylindrical hull IP, and project execution services. Customers are enterprise oil and gas operators (Shell UK, NEO Energy, Eni) and renewable energy developers, engaged through direct enterprise field sales and project-based relationships. Pricing is quote-based and not publicly disclosed; the company is ISO 9001:2015 certified.
Sevan Marine ASA firmographics
Firmographics- Name
- Sevan Marine ASA
- Legal name
- Sevan Deepwater Technology
- Website
- https://sevanmarine.com
- Company type
- Private
- Founded year
- 2001
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Sevan Deepwater Technology is a Bergen-based offshore engineering and design house providing patented cylindrical hull and semi-submersible floating platforms, plus digital mooring monitoring, to enterprise oil and gas and renewable energy operators. It operates as a fully owned subsidiary of Seatrium.
- Ownership category
- akta.pro rank
Sevan Marine ASA industry classification
Industry- Product category
- Offshore Engineering Services
- NAICS
- Ship and Boat Building (3366), Ship Building and Repairing (336611)
- SIC
- Ship & Boat Building & Repairing (3730), Oil & Gas Field Services, Nec (1389)
- akta.pro primary industry
- Drillship & Semi-submersible Rig Hull Construction (IMAJACAB)
- akta.pro secondary industries
- Offshore Wind & Renewable Support Vessel Construction (SOV, CTV, WTIV) (IMAJACAG), Hydrodynamics & Performance Engineering (Resistance, Propulsion, Seakeeping, Maneuvering) (IMAJAGAB)
Keywords
Where Sevan Marine ASA is headquartered
LocationHeadquarters
- HQ city
- Bergen
- HQ country
- Norway
- HQ region
- Europe
Offices3 records
Markets served
Sevan Marine ASA business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure
Revenue model
- Engineering & Design Services: Provide cost-efficient and reliable floating offshore solutions and services from concept to operation. Includes multidisciplinary studies at all project stages, project management, client representative services, and specialist advisory.
- Technology Licensing: License proprietary cylindrical hull technology and semi-submersible designs to energy companies. Patents secured internationally covering key features, geometries, and functional principles of cylindrical hull.
- Project Execution Services: Execute projects offering in-depth experience and comprehensive supply chain management. Single accountable counterparty from concept through EPC under Seatrium umbrella.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Sevan Marine ASA product offering
Product offeringCore offering
Sevan Deepwater Technology (formerly Sevan Marine ASA) is a specialized marine engineering and design house that provides cost-efficient and reliable floating offshore solutions and services. The company pioneered the patented cylindrical Sevan hull as a cost-effective alternative to traditional ship-shaped, turret-moored designs, and now also offers semi-submersible floating production unit designs for FPSO, FSO, FLNG, drilling, accommodation, and renewable energy applications.
Product overview
Sevan Deepwater Technology provides a portfolio of floating offshore solutions anchored by its patented cylindrical hull technology, now expanded to include semi-submersible designs. The core product line consists of the Sevan Cylindrical Hull (for FPSO, FSO, FLNG, and other applications) and the Sevan Semi-Submersible (for FPU applications). Supporting these hardware platforms are digital services including the Inquire platform for mooring integrity monitoring, mooring and marine operations services, consultancy services, and neXt decarbonization solutions. The company operates as a fully owned subsidiary of Seatrium.
Differentiator
Problem solved
Functional benefit
Brands
- Inquire: Sevan's in-house digitalization platform providing mooring integrity monitoring services.
Products and services
- Sevan Cylindrical Hull Patented double-symmetric cylindrical hull technology designed for geostationary mooring, eliminating the need for complex turret and swivel systems. Delivers excellent motion performance in harsh environments and offers scalability and flexibility for FPSO, FSO, FLNG, and other offshore applications.
- Sevan Semi-Submersible Semi-submersible floating production unit featuring a double-symmetric main hull with a ring pontoon and four vertical octagonal columns. Engineered for optimal efficiency with minimized cost and production time, scalable for specific client requirements and renewable energy applications.
- Inquire Digitalization Platform In-house digitalization platform providing mooring integrity monitoring services. Delivers continuous feedback on mooring system status including full history of tension levels, offsets, alarms, accumulated fatigue damage, and estimated fatigue life. Incorporates numerical models to evaluate mooring system status versus operating limits.
- Mooring & Marine Operations Services Expert services in mooring design and integrity management for all structures, water depths, and environments. Solutions minimize cost of ownership and environmental impact throughout the entire lifecycle from concept to decommissioning.
- Consultancy Services Multidiscipline studies across all project stages, project management, client representative services, specialist advisory, and digital solutions for offshore energy operators.
- neXt - Decarbonisation & New Energies Portfolio of solutions for decarbonization and new energies, leveraging floater design expertise to lower carbon footprint, enable measurable emission reductions, and unlock new revenue streams for clients in offshore wind and renewable energy.
- Sevan 400 FPSO Design A specific cylindrical hull FPSO design with process capacity of 45 kbbld and storage capacity of 400 kbbls. Designed for demanding offshore environments with reliability and seakeeping performance; deployed at the Penguins field in the UK North Sea.
Quantifiable outcome
- 12 Sevan-designed cylindrical units delivered worldwide over two decades
- +2 more outcomes
Companies that use Sevan Marine ASA
Customer profileNamed customers3 records
Segments2 records
Ideal customer profiles2 records
Sevan Marine ASA technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Sevan Marine ASA partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- SeatriumcoreSevan was integrated into SembCorp in 2018, and then combined with SSP Offshore into Sevan SSP. With SembCorp's entrance into Seatrium, Sevan was renamed Sevan Deepwater Technology. This provides clients with single accountable counterparty from concept through EPC, global yard and supply-chain capacity, and accelerated delivery schedules.
Scale indicators12 records
Recent moves9 records
Expansion highlights5 records
Sevan Marine ASA competitors and assessment
Company assessmentBroad incumbents
- Saipem: Italian offshore engineering, drilling, and construction group with floating production and subsea capabilities. Comparable as a broader incumbent competing on integrated offshore EPCI tenders.
- Aker Solutions: Norwegian offshore engineering and EPC incumbent with broader subsea, field development, and renewables exposure. Comparable as a Norwegian-headquartered offshore design and execution competitor.
- Hyundai Heavy Industries: Major Korean shipbuilder and offshore platform fabricator. Comparable as a yard that competes with Seatrium on FPSO hull construction and provides scale EPC capacity for floating production units.
- Technip Energies: Engineering and construction group with floating LNG and offshore production capabilities. Comparable as an incumbent in floating production design with overlapping customer base.
Direct peers
- Yinson Production: Malaysia-based FPSO operator and provider. Directly comparable as an FPSO contractor competing for floating production contracts with international oil company clients.
- BW Offshore: Norwegian-headquartered FPSO contractor and operator with a fleet of production units. Directly comparable as a competing FPSO designer/lessor targeting similar oil & gas operators in harsh-environment North Sea and deepwater markets.
- SBM Offshore: Global leader in FPSO leasing, design, and construction. Competes with Sevan on floating production tenders and serves the same enterprise oil & gas operator customer base.
- MODEC: Japanese FPSO contractor and operator with global deepwater deployments. Direct peer in FPSO hull design and EPCI services targeting similar offshore production customers.
- Heerema Marine Contractors: Offshore construction and engineering contractor for fixed and floating facilities. Comparable in mooring design, marine operations, and integrated offshore execution for energy operators.
Emerging players
- Principle Power: Specialist in floating offshore wind platform technology (WindFloat). Comparable as an emerging floater-design company targeting the renewable energy segment Sevan is expanding into.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Sevan Marine ASA social profiles
Digital presenceSevan Marine ASA compliance and trust
Trust signalCompliance1 record
Sevan Marine ASA financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sevan Marine ASA leadership team
Management profileNumber of profiles
Profiles1 record
Sevan Marine ASA funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sevan Marine ASA M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sevan Marine ASA
What does Sevan Marine ASA do?
Sevan Deepwater Technology (formerly Sevan Marine ASA) is a specialized marine engineering and design house that provides cost-efficient and reliable floating offshore solutions and services. The company pioneered the patented cylindrical Sevan hull as a cost-effective alternative to traditional ship-shaped, turret-moored designs, and now also offers semi-submersible floating production unit designs for FPSO, FSO, FLNG, drilling, accommodation, and renewable energy applications.
Is Sevan Marine ASA a public or private company?
Sevan Marine ASA is a private company. It is classified as corporate owned and is currently operating.
When was Sevan Marine ASA founded?
Sevan Marine ASA was founded in 2001. It employs 11 to 50 people.
Where is Sevan Marine ASA based?
Sevan Marine ASA is headquartered in Bergen, Norway, in the Europe region.
How does Sevan Marine ASA make money?
Three revenue lines are on record. Engineering & Design Services are the primary driver. The others are technology Licensing and project Execution Services.
Who are Sevan Marine ASA's main competitors?
Broad incumbents on record are Saipem, Aker Solutions, Hyundai Heavy Industries and Technip Energies. Direct peers are Yinson Production, BW Offshore, SBM Offshore, MODEC and Heerema Marine Contractors. Principle Power is listed as an emerging player.
Does Sevan Marine ASA have an API?
No public API is recorded for Sevan Marine ASA.
What industry is Sevan Marine ASA in?
Sevan Marine ASA's product category is Offshore Engineering Services. Its primary akta.pro industry code is IMAJACAB, Drillship & Semi-submersible Rig Hull Construction, with a secondary code of IMAJACAG, Offshore Wind & Renewable Support Vessel Construction (SOV, CTV, WTIV). Its NAICS code is 3366 and its SIC code is 3730.