What Transmark Subsea does

Transmark Subsea AS is a Bergen, Norway-based subsea engineering company founded in 2009 that designs, manufactures, and tests hardware for subsea electrical power and data transfer, mechanical connections, and long-life hose systems. Its core proprietary technology stack centers on the WiSub family of pinless, non-contact underwater connectors, which use patented high-frequency microwave electronics and resonant inductive power transfer to enable gap-tolerant wet-mate connections with galvanic isolation, and on the Murene long-life subsea hose system with a 25-year lifetime and 3000-meter depth rating. The company also builds cable and connector assemblies, polymer ancillaries (bend stiffeners, abrasion and impact protection), and fiber optic penetrators, and operates in-house testing infrastructure including a 35-meter cable lab, pressure vessels rated to 4000 meters, and helium testing equipment.

Transmark Subsea generates revenue through four streams: sale of subsea hardware products (including represented brands such as DeepSea Power & Light, Moog Focal, Seacon, and Gisma), custom engineering and R&D services, workshop-based testing, refurbishment and re-termination, and the Transmark Subsea Services (TSS) division supplying certified personnel for onshore and offshore assignments. Go-to-market is enterprise field sales via experienced sales engineers and subsea technical specialists working closely with customers on fit-for-purpose systems, supplemented by official Nordic/European manufacturer representations and a global Seacon distribution arrangement. Pricing is quote-based and not publicly disclosed, with the company emphasizing short lead times, in-stock standard products, and both standard and tailor-made solutions as core commercial differentiators.

The company primarily serves the oil and gas industry (including Equinor's underwater intervention drone docking stations since 2018), the seismic exploration industry, and ROV and oceanographic operators, with deployments reaching the US Gulf of Mexico alongside its Nordic and European base. In December 2024, Transmark Subsea was acquired by Malux, becoming a subsidiary of that niche tailored-solutions provider; the company holds ISO 9001 quality management certification and continues to operate from its Bergen headquarters.

Name

Transmark Subsea

Legal name

Transmark Subsea AS

Website

https://transmark-subsea.com

Company type

Private

Founded year

2009

Operating status

Acquired

Headcount range

11–50 employees

Short description

Transmark Subsea is a Bergen-based subsea engineering firm that designs, manufactures, and tests pinless underwater connectors, long-life hose systems, and cable/connector assemblies for oil and gas, seismic, and ROV operators, and was acquired by Malux in December 2024.

Ownership category

akta.pro rank

Product category

Subsea Connection and Monitoring Equipment

NAICS

Fluid Power Valve and Hose Fitting Manufacturing (332912), Support Activities for Water Transportation (4883)

SIC

Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Subsea Services & Equipment (Subsea Trees, Umbilicals, Installation, IMR) (EUALABAI)

akta.pro secondary industry

Offshore Subsea Gathering & Flowline Systems (TLAGAJAF)

Keywords

• Subsea cable systems
• Subsea connectors
• Underwater power transfer
• Subsea engineering services
• ROV equipment

Headquarters

HQ city

Aberdeen

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Subsea Equipment and Products: Sale of subsea hardware including ROV equipment, connectors, cables, monitoring and surveillance systems, and specialized subsea components. Products range from standard items to complex long life systems.
2. Engineering and Technical Services: Custom design solutions, research and development services, engineering consultation for subsea connection challenges, and system integration services.
3. Workshop and Testing Services: Cable/connector re-termination, pressure testing, refurbishment, fault detection, inspection, maintenance and repair services using their testing facilities.
4. Personnel Services: Supply of experienced and certified personnel for onshore and offshore assignments including Transmark Subsea Services (TSS).

Go-to-market motion1 record

Distribution channels5 records

Marketing channels2 records

Core offering

Transmark Subsea designs, manufactures, and tests subsea connection solutions and monitoring systems for oil and gas, seismic, and oceanographic customers. Its core portfolio includes WiSub pinless connectors for non-contact underwater power and data transfer, the Murene long-life hose system for subsea use, and a broad range of cables, connectors, and polymer ancillaries, complemented by engineering, pressure testing, and certified personnel services. The company combines a stocked catalog of standard subsea components with tailor-made custom solutions delivered from its Bergen workshop.

Product overview

Transmark Subsea is a subsea engineering company that designs, manufactures and tests subsea connection solutions and monitoring systems. The product portfolio centers on WiSub Pinless Connectors for wireless underwater power and data transfer, the Murene Long Life Systems family for subsea hose applications, and comprehensive Cable and Connector Systems. The company also represents DeepSea Power and Light (cameras, lights, batteries, relief valves, lasers) and Gisma Connectors, while offering Polymer Ancillaries (bend stiffeners, protection products) and Fibre Optic Penetrator Assemblies. Services include Transmark Subsea Services (TSS) providing certified personnel for cable re-termination, testing, and maintenance with pressure testing capabilities up to 600 bars.

Differentiator

Problem solved

Functional benefit

Brands

• WiSub: Pinless underwater connectors for non-contact electrical power and data transfer, including Maelstrom, Fonn, and Torden products.
• Murene
• Transmark Subsea Services (TSS)

Products and services

• WiSub Pinless Connectors Non-contact electrical power and data transfer connectors using patented high-frequency microwave electronics and resonant inductive power transfer, enabling underwater automation with wide angular misalignment tolerances and 360-degree axial rotation freedom. Sold to subsea automation, intervention drone, and oil and gas customers.
• Murene Long Life Systems (LLS) Superior subsea hose system designed for electric and fiber optic transmission, featuring gel/oil-filled pressure compensated design with 25-year lifetime and 3000m depth rating. Targeted at oil and gas operators needing long-duration subsea hose deployments.
• Cable and Connector Systems Stock of cables for ROVs, ROTs, and oceanographic equipment, combined with in-house polyurethane and rubber molding capability and a Seacon connector distribution line, supplied to ROV, AUV, and oceanographic customers.
• DeepSea Power & Light Products Represented brand offering including Vertex SeaCam, IP Multi SeaCam, and Apex SeaCam cameras, LED SeaLite lights, SeaVent Relief Valves, SeaBattery Power Module, Micro SeaLaser and SeaLaser 100, FleXlink, Multiray LED SeaLite, and SeaSense Protocol, assembled and tested by Transmark for subsea and oceanographic customers.
• Polymer Ancillaries Marine operation protection products including bend stiffeners, abrasion protection, impact protection, and custom-made solutions manufactured using in-house polyurethane and rubber molding, supplied to operators requiring protection against high or shock loads.
• Gisma Connectors Represented brand of connectors offered by Transmark Subsea, with engineering support for connector selection, assembly, and complete system testing delivered from Transmark's workshop.
• Cable Hang-off for Umbilical Topside Strain Relief Topside strain relief product for umbilical cables featuring steel and aramid armor termination, designed for operating temperatures from -40 to +70°C and standard cable diameters from 12mm to 35mm. Sold to subsea umbilical and topside operators.
• Fibre Optic Penetrator Assembly Standard or custom fibre optic penetrator assemblies with up to 10 fibres, differential pressure rating of 350 bar, available in flanged (FCR) or threaded (BCR) versions with single or multi-mode fibres, supplied to subsea equipment manufacturers.
• Transmark Subsea Services (TSS) Supply of experienced and certified personnel for onshore and offshore assignments, including cable and connector re-terminations, fault detection, inspection, maintenance, and repair services supported by in-house pressure tanks (450 and 600 bars) and a test pool.

Quantifiable outcome

• Short lead times enabling projects to stay on-schedule
• +3 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Six partnerships are on record, tiered core and major.

• MaluxcoreStrategic or Co-development Partner · 17 December 2024Transmark Subsea was acquired by Malux, a renowned provider of tailored solutions in niche business areas. This acquisition joins Malux AB and Transmark Subsea AS together.
• Moog FocalcoreChannel Partner/ Reseller/ Distributor · 18 October 2023Transmark appointed as official representative for Moog Focal's Subsea Integrated Solutions in the European market. This enables Transmark to offer fully integrated system solutions tailored to customer requirements.
• DeepSea Power & LightcoreChannel Partner/ Reseller/ Distributor · 7 November 2019Transmark Subsea became the new representative for DeepSea Power & Light in the Nordics. DeepSea's underwater lighting, cameras, batteries and PRV's align with Transmark's expansion strategy, combining engineering and manufacturing capabilities.
• Gisma ConnectorsmajorChannel Partner/ Reseller/ Distributor · 6 October 2019Transmark Subsea represents Gisma Connectors. Engineers help customers select the right connector and assemble and test complete systems per customer requirements.
• WiSubcoreStrategic or Co-development Partner · 1 October 2019Transmark acquired WiSub, combining mature cable and connector manufacturing with WiSub's innovative wireless underwater power and data transfer systems. Both companies had been key equipment providers to Equinor's underwater intervention drone docking stations since 2018.
• SeaconmajorChannel Partner/ Reseller/ DistributorOfficial distributor of Seacon connectors with wide range of Seacon connectors in stock. Products include cable and connector systems for ROV/ROT/AUV and oceanographic equipment.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• BIRNS: BIRNS designs and manufactures high-performance underwater connectors, cables and lighting for subsea oil & gas, military and oceanographic applications. It is a direct peer in subsea electrical connectivity with overlapping customer segments.
• MacArtney: MacArtney is a Danish-based subsea cable, connector and system integrator serving oil & gas, oceanographic and renewable markets. It is a direct peer in underwater power/data connectivity, cable termination and system integration, competing for similar offshore customers.
• Hydro Group (a TE Connectivity company): Hydro Group designs and manufactures subsea electrical and optical connectors, cables and assemblies for oil & gas, defense and renewables. It is a direct peer in underwater wet-mate and dry-mate connectivity with comparable product lines to Transmark's WiSub and Murene offerings.

Broad incumbents

• Aker Solutions: Aker Solutions is a large Norwegian subsea engineering and equipment supplier offering subsea trees, umbilicals, controls and intervention systems. It competes with Transmark on subsea hardware supply to Norwegian and international operators as a much larger incumbent.
• TechnipFMC: TechnipFMC is a global subsea equipment and services major covering trees, manifolds, controls, umbilicals and subsea intervention. It is a broad incumbent that competes with Transmark for subsea hardware awards on major offshore developments.
• Teledyne Marine (Teledyne Technologies): Teledyne Marine supplies underwater imaging, sonar, interconnect and instrumentation products through multiple brands including subsea connectors and cables. It is a broad incumbent with overlapping product categories, particularly through distribution partnerships similar to Transmark's DeepSea Power & Light representation.
• Oceaneering International: Oceaneering is a global subsea robotics, engineered services and intervention tooling provider with significant ROV operations. It is a broad incumbent competing with Transmark for subsea intervention hardware and personnel services.

Others

• DeepSea Power & Light: DeepSea Power & Light manufactures underwater lights, cameras, batteries and lasers for subsea applications; Transmark is its Nordic representative. As a partner it is thematically comparable — overlapping subsea product categories — but does not directly compete in Transmark's connectivity niche.
• Moog Focal: Moog Focal is a supplier of subsea integrated hydraulic and electro-hydraulic systems, for which Transmark holds European representation. Moog is a partner rather than competitor but operates in adjacent subsea hardware categories relevant to Transmark's customer base.

Emerging players

• Subsea Energy Solutions: Subsea Energy Solutions is a UK-based niche supplier of subsea connectors, cables and intervention tooling for offshore oil & gas. It is an emerging player with comparable product scope to Transmark but smaller scale and limited proprietary IP.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Transmark Subsea