Company lists · Data refreshed September 2026

Top 13 Ship retrofitting companies based in France

RevenueBase identified 54 ship retrofitting companies headquartered in France as of September 2026 and tracks 3,142 professional contacts across them, including 1,178 with verified work emails. Marseille is the largest hub.

This list covers ship retrofitting companies headquartered in France, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review
54Companies
3,142Contacts tracked
1,178Verified emails
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The 13 largest ship retrofitting companies based in France

Ranked by team size
Top 13 of 54 ship retrofitting companies based in France, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to ship retrofitting companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSaint-nazaire, FranceHQ checked Sep 19, 20261,001-5,0002,004 contacts →

Indirect evidence

“Installée sur la façade Atlantique, Chantiers de l’Atlantique est une entreprise de construction maritime (paquebots, sous-stations…) et de services aux flottes.”

Source: RevenueBase Database · checked Sep 19, 2026
2Indirect evidenceLa Ciotat, FranceHQ checked Sep 19, 202651-200156 contacts →

Indirect evidence

“MB92 La Ciotat, part of the MB92 Group, is a shipyard based on the French Riviera, a traditional hotspot for superyacht charters, providing superyacht refit and repair service on…”

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceSaint Mandrier S/mer, FranceHQ checked Sep 19, 202651-20067 contacts →

Indirect evidence

“IMS was founded in 1987 for the construction of aluminium passenger transport boats.”

Source: RevenueBase Database · checked Sep 19, 2026
4Indirect evidenceMarseille, FranceHQ checked Sep 19, 202651-20040 contacts →

Indirect evidence

“Fondée en 1994, Sud Moteurs Groupe est une société française de réparation navale composée de 3 filiales - Sud Moteurs Marseille, avec 3 ateliers de mécanique situés à Marseille…”

Source: RevenueBase Database · checked Sep 19, 2026
5Partial evidenceMarseille, FranceHQ checked Sep 19, 202611-5036 contacts →

Partial evidence

“MACOR is a company specializing in ship repair and maintenance for 40 years.”

Source: RevenueBase Database · checked Sep 19, 2026
6Indirect evidenceLe Havre, FranceHQ checked Sep 19, 20261,001-5,00027 contacts →

Indirect evidence

“Héritier du savoir-faire d’ACH Engineering, l’entreprise a évolué au travers de son activité de maintenance des équipements livrés.”

Source: RevenueBase Database · checked Sep 19, 2026
7Indirect evidenceLa Ciotat, FranceHQ checked Sep 19, 202611-5022 contacts →

Indirect evidence

“The Nautech group, specialized in the refit and maintenance of yahcts, is a human-sized shipyard with more than 25 years of experience in the service of some of the most beautiful…”

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceSix Fours Les Plages, FranceHQ checked Sep 19, 202611-5019 contacts →

Indirect evidence

“At d2m, our expert team of marine engineers, naval architects, and offshore contractors have been committed to crafting innovative solutions for complex maritime projects for over…”

Source: RevenueBase Database · checked Sep 19, 2026
9Indirect evidenceLa Ciotat Cedex, FranceHQ checked Sep 19, 20261,001-5,00018 contacts →

Indirect evidence

“As one of the world leaders in refitting and repairing mega yachts, LA CIOTAT SHIPYARDS is managed by the SEMIDEP-Ciotat Local Public Company (SPL).”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceMarsille, FranceHQ checked Sep 19, 202611-5013 contacts →

Indirect evidence

“Yacht refit and maintenance”

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceMarseille, FranceHQ checked Sep 19, 20261-106 contacts →

Indirect evidence

“ALWENA SHIPPING, your partner of choice, provide its expertise to shipowners and other maritime stakeholders for new build vessels projects, retrofit and fleet optimisation.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceVélizy-villacoublay, FranceHQ checked Sep 19, 202611-504 contacts →

Indirect evidence

“LSN est spécialisée en architecture et expertise navales pour tous types de navires maritimes et fluviaux, alliant innovation, performance et conformité réglementaire.”

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceCarnac, FranceHQ checked Sep 19, 20261-101 contacts →

Indirect evidence

“Bureau d'étude & systèmes embarqués nautiques pour la performance – Électronique, Énergie, Informatique.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 13 of 54 ship retrofitting companies based in France

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Ship retrofitting companies based in France at a glance

As of Sep 19, 2026
37.5%Verified-email coverage
58.2Average contacts per company
11-50Median size (employees)
13.0%Largest-city concentration · Marseille
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
26
11-50
17
51-200
5
201-500
1
1,001-5,000
5

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 54 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among ship retrofitting companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in France whose own description of what they do matches “ship retrofitting companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names ship retrofitting companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among ship retrofitting companies, and records with no verified work email. Companies headquartered outside France are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 1,178 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names ship retrofitting companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many ship retrofitting companies are there based in France?

RevenueBase identified 54 ship retrofitting companies headquartered in France as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Chantiers DE L'atlantique, headquartered in Saint-Nazaire, tops this list with the largest team on record.

Which city has the most ship retrofitting companies?

Marseille leads with 7 headquartered companies, followed by Concarneau (3) and La Ciotat (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,178 verified decision-maker contacts tracked across these 54 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.