TSM

What TSM does

TSM (Thomas Services Maritimes) is a privately-held, family-owned French maritime services company founded in 1905 and headquartered in Rouen. It operates a fleet of approximately 34 specialized vessels and a workforce of roughly 270 people across five French port bases (Rouen, Dieppe, Bordeaux, Brest, Sète) following the 2024 acquisition of Lamanage de La Rochelle. The company's revenue is generated through three integrated service lines: port towing and 24/7 ship assistance under multi-year level contracts with French port authorities; offshore towing, salvage, and emergency response via the COROS subsidiary; and marine renewable energy services — crew transfer through the TSM Windcat joint venture with Windcat Workboats, DP2 dynamic-positioning offshore work via IROISE MER, cable landing and subsea inspection, sea trials, and installation engineering.

TSM's technical platform centers on a diversified vessel mix — ASD/RSD tugs up to 80 tons bollard pull, DP1/DP2 multifunction vessels (TSM TEXEL, TSM OUESSANT, TSM PENZER), Shoalbuster-class anchor handlers, and a 7-vessel French-flagged CTV fleet including the hydrogen dual-fuel MK5 series WINDCAT 59. Proprietary assets include the WindGrip crew transfer thrust system (via Windcat JV), shallow-draft vessel designs for tidal environments, and an in-house engineering bureau running Orcaflex/Orcawave/AutoCAD for cable and mooring design. TSM serves French port authorities (Grand Port Maritime de Rouen, ports of Dieppe/Le Tréport/Fécamp, Bordeaux, Sète) and offshore wind developers (Ailes Marines for Saint-Brieuc, Eoliennes Offshore du Calvados for Courseulles, Fécamp) via project-based contracts and 24/7 emergency response.

The business model combines recurring subscription-style revenue from port contracts with project-based fees from offshore wind construction and maintenance campaigns. TSM sells primarily through direct enterprise relationships, long-tenure port authority concessions, and dedicated vessel deployments. The company is ISO 9001:2015 certified, operates vessels under French flag with HSC code and Code des Navires de Maintenance en Mer compliance, and is targeting triple ISO 9001/14001/45001 certification. The Thomas family retains full control with Loïc Thomas as President, and the May 2025 announced acquisition of coastal freighter Transport Maritime Côtier (TMC) signals entry into scheduled island-liner services as a fourth revenue stream.

Name

TSM

Legal name

THOMAS SERVICES MARITIMES (TSM)

Website

https://tsmgroup.eu

Company type

Private

Founded year

1905

Operating status

Operating

Headcount range

51–100 employees

Short description

TSM is a family-owned French maritime services company operating ~34 specialized vessels across five French ports, providing 24/7 port towing, offshore towing, marine renewable energy services, and crew transfer for offshore wind farms.

Ownership category

akta.pro rank

Product category

Maritime Services (Port Towing & Marine Assistance)

NAICS

Support Activities for Water Transportation (4883)

SIC

Water Transportation (4400)

akta.pro primary industry

Coastal/Sea Towage (Long-Distance Towing of Vessels/Barges) (TLAHAHAE)

akta.pro secondary industry

Pilotage Authority & Dispatch Services (Pilot Stations, Rostering, VTS Interface) (TLAHAGAG)

Keywords

• Port towing services
• Offshore wind services
• Maritime assistance
• Crew transfer vessels
• Subsea inspections

Headquarters

HQ city

Rouen

HQ country

France

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Port Towing Services: Core port towing operations in Rouen, Dieppe, Bordeaux, and Sète providing assistance to ships 365 days/year, 24h/24. Revenue generated through service contracts with port authorities and shipping companies.
2. Offshore Wind Services: Crew transfer vessel (CTV) services, subsea inspections, cable installation and landing operations, sea trials for wind and tidal energy installations. Growing revenue stream from French offshore wind farm development.
3. Offshore Towing: High seas towing services with vessels from 33 to 70 tons bollard pull, available along French coastline for short distances or longer trips across Europe
4. Subsea Works and Inspections: ROV and diver-based inspection services, UXO clearance, cable burial and protection, wreck recovery operations using specialized offshore vessels

Go-to-market motion2 records

Distribution channels3 records

Marketing channels3 records

Core offering

TSM operates a fleet of approximately 30+ specialized vessels providing port towing, offshore towing, marine assistance and salvage, cable landing and shore-end installation, subsea inspection, sea trials, installation engineering, and crew transfer services to French ports, shipping companies, and offshore wind farm developers. The group operates through wholly-owned subsidiaries (SORMAR, CRD, CRMBB, CMRS, IROISE MER, COROS) and a joint venture (TSM Windcat) covering all French coastlines 24/7, 365 days per year.

Product overview

TSM (Thomas Services Maritimes) is a family-owned French maritime services company founded in 1905, operating a diversified fleet of approximately 30+ vessels across three core service categories. The core offering consists of port towing (SORMAR in Rouen, CRD in Dieppe, CRMBB in Bordeaux, CMRS in Sète), offshore towing (COROS), and marine assistance & salvage — all supported by subsidiaries and joint ventures. TSM's growing marine renewable energy (MRE) division includes subsea inspection and ROV operations, cable landing and shore-end installation services, sea trials, installation engineering, crew transfer (via the TSM Windcat CTV joint venture with Windcat Workboats), and cargo/storage logistics. The fleet is organized around three vessel types: multifunction DP1/DP2 offshore service vessels (TSM BERGEN, TSM TEXEL, TSM OUESSANT, TSM PENZER, TSM KERMOR, TSM BATZ, MYTILUS), ASD/RSD/classic tugboats (TSM HONFLEUR, TSM ROUEN, RMT PENFRET, TSM ODET, RM MEDOC, TSM DRENEC, TSM Molène, TSM Loch, TSM Chausey, TSM Brehat, Capitaine Jean-Thomas, BON SECOURS vessels), and the TSM Windcat CTV fleet (WINDCAT 59, 56, 54, 53, 52, 49, 44) for offshore wind technician transfers. TSM also operates IROISE MER as a Brest-based subsidiary for maritime works, and has acquired Lamanage de La Rochelle (2024) and is pursuing acquisition of TMC (coastal freight, expected Q2 2025). The engineering department provides project-specific installation engineering using Orcaflex, Orcawave, and AutoCAD software.

Differentiator

Problem solved

Functional benefit

Products and services

• Port Towing (Remorquage portuaire) Port towing services operating 24/7, 365 days per year at the ports of Rouen, Dieppe, Bordeaux, and Sète. Fleet of versatile tugs ranging from 20 to 80 tons bollard pull.
• Offshore Towing (Remorquage hauturier)
• Marine Assistance & Salvage Emergency marine assistance services including vessel towing for vessels over 100m, pollution response, drifting object recovery, firefighting, and navigation safety operations available 24/7 along French coasts.
• Cables & Shore Ends (Câbles & Atterrages) Cable landing and shore-end installation services using vessels with very low draft designed for strong tidal environments. Includes cable laying studies, stability analysis, burial operations, and cable protection solutions such as ductile iron shells, concrete mattresses, and sinking.
• Subsea Work and Inspection (Inspections sous-marines) Underwater inspection and works using ROV (Remotely Operated Vehicle) and professional divers. Services include UXO clearance, cable inspection, wreck searching, concrete mattress installation, and block relocation.
• Sea Trials (Essais en mer) Sea trials support for tidal, wave, and wind turbine prototypes, including technical assistance, project management, and multidisciplinary vessel deployment.
• Engineering Department (Bureau d'études) Installation engineering services including cable laying, hook-up, and mooring design. Uses Orcaflex, Orcawave, AutoCAD, and proprietary software. Integrates field crew experience into engineering methodologies.
• Crew Transfer (Transport de personnel) Technician and personnel transfer to offshore wind installations via TSM Windcat CTV fleet. Services under French flag compliant with HSC 2000 code and Codes des Navires de Maintenance en Mer. TSM Windcat joint venture operates 7 CTV vessels as of 2025.
• Cargo and Storage (Livraison et stockage) Logistics and storage services for maritime projects, including barge transport to difficult-access sites, beaching and craning operations, and dedicated storage facilities in Brest (1,400 m² supervised storage and 650 m² additional storage).

Quantifiable outcome

• 70+ years in port towing operations in Rouen alone
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Seven partnerships are on record, tiered core, major, strategic and minor.

• Windcat WorkboatscoreStrategic or Co-development Partner · 12 October 2012Joint venture created in 2012 as TSM Windcat, combining TSM's French maritime expertise with Windcat Workboats' CTV design and operational experience. Europe's leading CTV supplier for offshore wind market. Partnership has delivered 7+ crew transfer vessels including newest MK5 generation with hydrogen dual-fuel capability.
• Neptune ShipyardsmajorTechnology or IntegrationDutch shipbuilder constructing TSM's DP2 multifunction vessels including TSM Ouessant (36m, 2020) and TSM Texel (36m, 2023). Build quality and innovative design for shallow-draft operations supporting marine renewable energy sector.
• Damen ShipyardsmajorTechnology or IntegrationInternational shipbuilder constructing multiple tugs for TSM including TSM Rouen, TSM Honfleur, TSM ODET (60t bollard pull), and TSM TREZ (ASD 2811, 60t bollard pull, 2025). Series production of modern, efficient harbor tugs.
• Delavergne ShipyardmajorTechnology or IntegrationFrench shipbuilder in Vendée constructing hulls for TSM WINDCAT CTV fleet and TSM Penzer. National content requirement compliance for French offshore wind operations.
• CMB.TECHstrategicTechnology or IntegrationTechnology partner providing dual-fuel hydrogen engines for TSM WINDCAT 59 (MK5 series, 2025), enabling reduced CO2 emissions and flexibility between traditional fuel and hydrogen propulsion for sustainable maritime operations.
• Armateurs de FranceminorStrategic or Co-development PartnerNational maritime employers association supporting TSM's advocacy and industry representation in French maritime policy development.
• Cluster Maritime FrançaisminorStrategic or Co-development PartnerFrench maritime cluster fostering networking and collaboration among maritime industry players in France.

Scale indicators6 records

Recent moves11 records

Expansion highlights6 records

Regional players

• Multraship: Dutch towage, salvage, and offshore services company operating in northwest European ports. Comparable to TSM on offshore towing and harbor assistance but focused primarily on the Netherlands/Belgium/North Sea markets.

Direct peers

• SeaOwl: French offshore services company providing subsea inspection, ROV services, and offshore support to the energy industry. Comparable on subsea works and French offshore wind service offering to TSM.
• Boluda Towage: Spanish-headquartered global towage operator with significant French port towing presence (Le Havre, Marseille, Dunkirk). Direct competitor in port towing and harbor assistance, sharing the same core market of 24/7 ship assistance at French commercial ports.
• Les Abeilles (Groupe Foselev): French marine assistance, salvage, and towage company with historic role in French maritime emergency response. Direct peer in marine assistance & salvage and offshore towing along the French coastline.
• JIFMAR Offshore Services: French offshore services company specializing in subsea inspection, ROV operations, and offshore support for marine renewable energy and oil & gas. Directly comparable on offshore vessel operations, subsea works, and French offshore wind service provision.

Broad incumbents

• Svitzer: Global towage leader owned by A.P. Moller-Maersk, with operations across multiple French ports. Competes with TSM on port towing contracts and benefits from substantially larger scale and global network.
• KOTUG International: Dutch international towage and offshore services company with European port operations. Competes with TSM in harbor towage and offshore vessel services, particularly on cross-European offshore projects.
• Bourbon (BOURBON Maritime): French offshore marine services provider operating a large global fleet of offshore support vessels (OSVs). Overlap with TSM in French offshore wind vessel support, though Bourbon serves a broader global oil & gas and renewables customer base.

Emerging players

• Compagnie Fluviale de Transport (CFT): French inland and coastal maritime transport company, part of the Sogestran group. Comparable as a French family-connected maritime operator with adjacent coastal logistics capabilities, particularly relevant given TSM's pending TMC acquisition.

Others

• Windcat Workboats: TSM's joint venture partner in TSM Windcat and Europe's leading CTV operator (50 vessels globally). Acts both as a partner and partial competitor for CTV services in the French offshore wind market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/tsm-group-eu
• Instagraminstagram.com/tsm_group
• Xx.com/thomasloic

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries9 records

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 TSM