Subsea 7
Subsea 7 is a Luxembourg-domiciled, Oslo-listed offshore EPCI contractor delivering SURF projects, vessel-based installation, IRM and renewables services to major international and national oil companies across 30+ countries, with FY2025 revenue of $7.1B and a $13.8B backlog.
- Company typePublic
- Founded2002
- HeadquartersLondon, United Kingdom
- Headcount5,001–10,000
- GTM typeB2B
- OfferingServices
What Subsea 7 does
Subsea 7 S.A. is a Luxembourg-domiciled, Oslo Børs-listed offshore engineering, procurement, construction and installation (EPCI) contractor serving the global energy industry. Founded in its current form in 2002 from a DSND/Halliburton joint venture and reshaped by the 2011 merger with Acergy, the company operates a fleet of pipelay, construction, heavy-lift, survey and ROV vessels supported by spoolbases, fabrication yards and project management offices across more than 30 countries, employing approximately 15,000 people. Its core offering is the integrated delivery of SURF (subsea umbilicals, risers and flowlines) projects for major international oil companies and national oil companies such as Petrobras, ExxonMobil, Chevron, BP, Equinor, ConocoPhillips, Woodside and Vår Energi, alongside inspection, repair and maintenance (IRM), life-of-field and decommissioning services.
The company's revenue model is project-based, with contract values ranging from $50M (sizeable) to over $1.25B (supermajor), spanning two-to-four-year execution cycles. Subsea7 also operates the Seaway7 renewables business unit for offshore wind installation (cumulative ~15.8 GW supported by end-2024) and runs autonomous subsidiaries Xodus (engineering) and 4Subsea (data analytics). Strategic alliances include the OneSubsea joint venture with SLB and Aker Solutions and the Subsea Integration Alliance, both targeting integrated SPS-SURF delivery. The company is also pursuing emerging energy services in carbon capture and storage (Northern Lights project) and offshore hydrogen.
Subsea7 generated $7.1B of revenue in FY2025 with $1.48B adjusted EBITDA (21% margin, 36% YoY growth) and ended the year with a record $13.8B backlog. It is engaged in a proposed 50:50 merger with Saipem S.p.A. to create Saipem7 (target close H2 2026, ~€21B combined revenue, ~€43B backlog, €300M synergies), with Brazil's CADE having granted unconditional antitrust approval in June 2026.
Subsea 7 firmographics
Firmographics- Name
- Subsea 7
- Legal name
- Subsea 7 S.A.
- Website
- https://subsea7.com
- Company type
- Public
- Founded year
- 2002
- Operating status
- Operating
- Headcount range
- 5,001–10,000 employees
- Short description
- Subsea 7 is a Luxembourg-domiciled, Oslo-listed offshore EPCI contractor delivering SURF projects, vessel-based installation, IRM and renewables services to major international and national oil companies across 30+ countries, with FY2025 revenue of $7.1B and a $13.8B backlog.
- Ownership category
- akta.pro rank
Subsea 7 industry classification
Industry- Product category
- Subsea Engineering and Offshore EPCI Services
- NAICS
- Oil and Gas Field Machinery and Equipment Manufacturing (333132), Ship Building and Repairing (336611)
- SIC
- Oil & Gas Field Machinery & Equipment (3533), Ship & Boat Building & Repairing (3730)
- akta.pro primary industry
- Subsea Services & Equipment (Subsea Trees, Umbilicals, Installation, IMR) (EUALABAI)
- akta.pro secondary industries
- Offshore Wind Substructures & Marine Engineering (Monopiles, Jackets, Floating) (EUAMACAE), Subsea Construction & IMR Vessel Newbuilds (CSV, DSV, ROV Support) (IMAJACAD)
Keywords
Where Subsea 7 is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices6 records
Markets served
Subsea 7 business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Operations, Personnel, Infrastructure, Supply Chain, Technology or R&D, Marketing or Sales
Revenue model
- EPCI Contracts: Engineering, Procurement, Construction and Installation contracts for subsea offshore projects. Revenue recognized over project lifecycle typically spanning 2-4 years. Contract values range from $150M-$300M (substantial) to over $1.25B (supermajor).
- Offshore Services: Inspection, Repair and Maintenance (IRM) services, life of field services, and decommissioning support. Typically shorter-cycle engagements complementing large project work.
- Renewables Installation: Offshore wind installation services through Seaway7, including foundation installation, turbine installation, and cable lay operations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | EPCI project contracts - value-based tiers |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels9 records
Subsea 7 product offering
Product offeringCore offering
Subsea 7 delivers engineered offshore projects and services for the global energy industry, covering subsea umbilicals, risers and flowlines (SURF) EPCI, inspection/repair/maintenance (IRM), life-of-field services, and decommissioning. The company also installs offshore wind foundations, turbines and cables through its Seaway7 business unit, and sells proprietary enabling products such as EHTF flowlines, deepwater risers and modular structures.
Product overview
Subsea 7 is a global leader in offshore projects and services for the energy industry, operating as a single unified service provider rather than a platform-plus-modules architecture. The company offers a comprehensive portfolio spanning: (1) Subsea and Conventional services including SURF (Subsea Umbilicals, Risers, and Flowlines) EPCI, inspection/repair/maintenance (IRM), life-of-field services, and decommissioning; (2) Renewables and Emerging Energies through Seaway7 subsidiary for offshore wind installation, plus Carbon Capture and Storage and Hydrogen initiatives; (3) Enabling Products including Flowlines (with EHTF thermal mitigation), Risers, and Structures. The portfolio is supported by autonomous subsidiaries Xodus (engineering) and 4Subsea (data analytics), strategic alliances including Subsea Integration Alliance with SLB OneSubsea and OneSubsea joint venture (with Aker Solutions and SLB), and regional joint ventures in Nigeria, Angola, Ghana, Equatorial Guinea, and Malaysia. Recent major contracts include Sépia 2 in Brazil ($1.25B+), Goliat Gas Export in Norway ($150-300M), Likembe in Angola ($150-300M), and Sakarya in Turkey ($300-500M). The company is pursuing a merger with Saipem to create 'Saipem7' expected to close H2 2026.
Differentiator
Problem solved
Functional benefit
Brands
- Seaway7: Offshore wind installation business unit of Subsea7 Group offering foundation, turbine installation, cable lay, and transportation services
- Xodus
- 4Subsea
Products and services
- SURF (Subsea Umbilicals, Risers and Flowlines) EPCI
- Inspection, Repair and Maintenance (IRM)
- Flowline Systems
- Riser Systems
- Modular Subsea Structures
- Seaway7 Offshore Wind Installation
- Carbon Capture and Storage (CCS) Services
- Offshore Hydrogen Solutions
- Xodus Engineering Services
- 4Subsea Decision Support and Analytics
- Subsea Integration Alliance (Integrated SPS-SURF)
- OneSubsea Subsea Technology and Solutions
Quantifiable outcome
- 35GW cumulative power capacity of renewables projects supported by 2030 (18GW by 2025)
- +5 more outcomes
Companies that use Subsea 7
Customer profileNamed customers14 records
Segments4 records
Ideal customer profiles3 records
Subsea 7 technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Subsea 7 partnerships and signals
Strategic signalPartnerships
15 partnerships are on record, tiered supporting, major, core and regional.
- Envirex GroupsupportingOneSubsea (SLB/Aker Solutions/Subsea7 JV) completed acquisition of the subsea business of Norwegian Envirex Group to support development of next-generation subsea solutions including umbilical-less and wireless systems.
- PETRONAS SurinamemajorSubsea Integration Alliance signed strategic collaboration agreement with PETRONAS Suriname E&P for field development projects in Suriname's frontier basin. Establishes long-term framework for pre-FEED, FEED and EPCIC solutions.
- OneSubsea (SLB, Aker Solutions, Subsea7 JV)coreOneSubsea is a joint venture established in 2023 by SLB (formerly Schlumberger), Aker Solutions, and Subsea7 to create a world-leading subsea technology and solutions provider. The joint venture combines subsea production systems (SPS) and SURF capabilities for integrated project delivery.
- Subsea Integration AlliancecoreStrategic partnership between Subsea7 and SLB OneSubsea providing integrated SPS-SURF solutions to clients. Enables standardisation and optimisation of systems across the full subsea spectrum.
- Aker BPmajorStrategic partnership with Aker BP in Norway for subsea projects on the Norwegian Continental Shelf, working as an alliance to facilitate standardisation and optimisation.
- Global Oceon (Nigeria)regionalJoint venture in Lagos providing multi-disciplinary engineering services for offshore oil and gas projects in Nigeria.
- Sonamet (Angola)regionalJoint venture in Angola operating the Lobito fabrication yard, providing construction services for shallow and deep water projects off the coast of Angola.
- Subsea 7 Volta Contractors and Belmet 7 (Ghana)regionalJoint ventures in Ghana providing EPCI and IMR project support and execution, with Belmet 7 operating a fabrication yard in Takoradi supporting onshore and offshore oil and gas projects.
- Subsea 7 Equatorial GuinearegionalJoint venture developed to provide life of field services and SURF and conventional projects for the oil and gas industry offshore Equatorial Guinea.
- Subsea 7 MalaysiaregionalJoint venture established to provide EPCI services to the oil and gas industry in Malaysia.
- Seaway7coreSeaway7 is a business unit within Subsea7 Group and a leader in offshore wind installation, offering foundation installation, turbine installation, cable lay and transportation services.
- XodussupportingAutonomous Subsea7 subsidiary supporting clients with independent engineering solutions to reduce carbon footprint and optimise field development plans.
- 4SubseasupportingAutonomous Subsea7 subsidiary delivering critical decision support to energy providers through domain expertise, data analytics and digital services to maximise asset lifetime and reduce operational cost.
- EnerMechregionalEnerMech was contracted by Subsea7 to deliver pipeline flushing and cleaning workscope as part of field decommissioning program in Gulf of Mexico.
- ABL Energy & Marine Consultants BrasilregionalABL appointed as Marine Warranty Surveyor (MWS) to support Subsea7 with transportation and installation of subsea SURF infrastructure for FPSO units at the Mero field in Brazil.
Scale indicators11 records
Recent moves6 records
Expansion highlights6 records
Subsea 7 competitors and assessment
Company assessmentDirect peers
- Boskalis: Dutch marine services major with offshore wind, subsea cable lay and heavy-lift capabilities that overlap Subsea7/Seaway7's renewables and SURF install scopes.
- Helix Energy Solutions: US-based subsea well intervention and field services company competing for IRM and life-of-field scopes on Gulf of Mexico and Brazilian deepwater assets.
- Jan De Nul: Luxembourg-based offshore contractor with strong offshore wind installation and subsea cable-lay presence — directly comparable to Seaway7's renewables installation offering.
- DOF Subsea: Norwegian subsea IMR, SURF and offshore vessel operator competing for inspection, repair and maintenance contracts — the same life-of-field revenue stream Subsea7 pursues via Equinor frame agreements.
- DeepOcean: Netherlands-based subsea services company competing for SURF installation, IMR and trenching contracts across the North Sea and Atlantic margins.
- Van Oord: Dutch offshore contractor and key competitor to Seaway7 in foundation, cable-lay and turbine installation for European offshore wind farms.
- Saipem: Italian offshore E&C major competing head-to-head in SURF EPCI tendering across Brazil, West Africa, Mediterranean and the Middle East; designated merger partner under the Saipem7 combination announced mid-2025.
- TechnipFMC: Dual-listed subsea EPCI and SPS provider — closest direct comp on the SPS-SURF integrated offering that Subsea7's OneSubsea JV is designed to match.
- McDermott: Houston-based offshore EPCI competitor active across the same deepwater basins (Gulf of Mexico, Brazil pre-salt, Asia-Pacific) with comparable SURF project delivery capability.
- Aker Solutions: Norwegian subsea and engineering peer; co-owner of the OneSubsea JV with Subsea7 and SLB, and a direct competitor on Norwegian Continental Shelf subsea contracts.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
Subsea 7 social profiles
Digital presenceSubsea 7 compliance and trust
Trust signalCompliance4 records
Subsea 7 financial estimates
Financial estimateRevenue estimate
Valuation estimate
Subsea 7 leadership team
Management profileNumber of profiles
Profiles15 records
Subsea 7 subsidiaries and ownership
Company hierarchySubsidiaries10 records
Subsea 7 funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Subsea 7 M&A and investment
M&A and investmentM&A5 records
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Subsea 7
What does Subsea 7 do?
Subsea 7 delivers engineered offshore projects and services for the global energy industry, covering subsea umbilicals, risers and flowlines (SURF) EPCI, inspection/repair/maintenance (IRM), life-of-field services, and decommissioning. The company also installs offshore wind foundations, turbines and cables through its Seaway7 business unit, and sells proprietary enabling products such as EHTF flowlines, deepwater risers and modular structures.
Is Subsea 7 a public or private company?
Subsea 7 is a public company. It is classified as public and is currently operating.
When was Subsea 7 founded?
Subsea 7 was founded in 2002. It employs 5,001 to 10,000 people.
Where is Subsea 7 based?
Subsea 7 is headquartered in London, United Kingdom, in the Europe region.
How does Subsea 7 make money?
Three revenue lines are on record. EPCI Contracts are the primary driver. The others are offshore Services and renewables Installation.
Who are Subsea 7's main competitors?
Direct peers on record are Boskalis, Helix Energy Solutions, Jan De Nul, DOF Subsea, DeepOcean, Van Oord, Saipem, TechnipFMC, McDermott and Aker Solutions.
Does Subsea 7 have an API?
No public API is recorded for Subsea 7.
What industry is Subsea 7 in?
Subsea 7's product category is Subsea Engineering and Offshore EPCI Services. Its primary akta.pro industry code is EUALABAI, Subsea Services & Equipment (Subsea Trees, Umbilicals, Installation, IMR), with a secondary code of EUAMACAE, Offshore Wind Substructures & Marine Engineering (Monopiles, Jackets, Floating). Its NAICS code is 333132 and its SIC code is 3533.