# The 50 largest Maritime Transportation companies in the United Kingdom

Tamtam tracks 59 Maritime Transportation companies headquartered in the United Kingdom. This list ranks the 50 largest by number of employees on LinkedIn, led by V.Group, Lloyd's Register and Zodiac Maritime. Their median headcount is 392. Half of them were founded in 1972 or later. The most common headquarters are London (22), Glasgow (3) and Southampton (3).

These are maritime transportation companies in the United Kingdom, ranging from large groups to mid-sized firms. They cover a broad spectrum of activities within the sector, including ship management, classification, brokering, and specialized services. Many of these companies are headquartered in London, indicating a concentration of maritime expertise in the capital.

V.Group is a partner in maritime activities, while Lloyd's Register provides engineering and technology services for critical infrastructures. Zodiac Maritime manages a diverse fleet of carriers, and Clarksons offers global maritime services including shipbroking and finance. Survitec Group Ltd. specializes in survival technology, and Princess Yachts designs luxury yachts. A notable pattern is the presence of several long-established companies, with many founded in the 19th century.

🇬🇧 United Kingdom · 50 companies · Updated Nov 15, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [V.Group](https://www.tamtam.ai/c/v-group) (vgrouplimited.com)<br>A dedicated partner advancing maritime activities and innovations | Maritime Transportation | 🇬🇧 London | 5,889 | 1984 |
| 2 | [Lloyd's Register](https://www.tamtam.ai/c/lloyd-s-register) (lr.org)<br>Provides professional engineering and technology services to improve safety and performance of critical infrastructures worldwide, supporting engineering research and education. | Maritime Transportation | 🇬🇧 London | 5,881 | 1760 |
| 3 | [Zodiac Maritime](https://www.tamtam.ai/c/zodiac-maritime) (zodiac-maritime.com)<br>A global ship operating company headquartered in London, managing a diverse fleet of bulk carriers, tankers, container ships, and car carriers with over 6,500 crew members | Maritime Transportation | 🇬🇧 London | 2,257 | 1976 |
| 4 | [Clarksons](https://www.tamtam.ai/c/clarksons) (clarksons.com)<br>Global maritime services company offering shipbroking, research, finance, digital tools, port services, and green advisory services for smarter, sustainable shipping solutions | Maritime Transportation | 🇬🇧 St. Katharine Docks | 1,991 | 1852 |
| 5 | [Merchant Navy](https://www.tamtam.ai/c/merchant-navy)<br>Global maritime industry employing professional seafarers on commercial vessels to facilitate international trade across the world | Maritime Transportation | 🇬🇧 London | 1,869 |  |
| 6 | [Survitec Group Ltd.](https://www.tamtam.ai/c/survitec-group-ltd) (survitecgroup.com)<br>Global leader in survival technology providing liferafts, marine evacuation systems, offshore PPE, and critical safety solutions worldwide. | Maritime Transportation | 🇬🇧 Birkenhead | 1,425 | 1854 |
| 7 | [Princess Yachts](https://www.tamtam.ai/c/princess-yachts) (princessyachts.com)<br>Design and manufacture luxury yachts with skilled craftsmanship, focusing on detailed perfection to deliver exceptional boating experiences. | Maritime Transportation | 🇬🇧 Plymouth | 1,132 | 1965 |
| 8 | [Maritime and Coastguard Agency](https://www.tamtam.ai/c/maritime-and-coastguard-agency) (linktr.ee)<br>This organization implements maritime safety policies in the UK, provides search and rescue services, inspects ships, certifies seafarers, and responds to pollution incidents | Maritime Transportation | 🇬🇧 Southampton | 1,056 |  |
| 9 | [CalMac Ferries Limited](https://www.tamtam.ai/c/calmac-ferries-limited) (calmac.co.uk)<br>An award-winning ferry operator serving 30 island destinations along the west coast of Scotland, carrying 5 million passengers annually | Maritime Transportation | 🇬🇧 Gourock | 798 | 1851 |
| 10 | [Northern Marine Manning Services Ltd](https://www.tamtam.ai/c/northern-marine-manning-services-ltd) (nmms.co.uk)<br>A leading provider of high quality marine and offshore personnel, offering crew management services with a focus on safety and quality | Maritime Transportation | 🇬🇧 Clydebank | 758 | 1983 |
| 11 | [Northern Marine Group](https://www.tamtam.ai/c/northern-marine-group) (nmg-stena.com)<br>Providing reliable ship management and marine services with a focus on safety, quality, and efficient operation of diverse fleets worldwide. | Maritime Transportation | 🇬🇧 Clydebank | 713 |  |
| 12 | [PD Ports](https://www.tamtam.ai/c/pd-ports) (pdports.co.uk)<br>Operate major UK ports and logistics centers, manage vessel traffic, support apprenticeships, and maintain supply chain efficiency across key locations. | Maritime Transportation | 🇬🇧 Middlesbrough | 676 |  |
| 13 | [SSY](https://www.tamtam.ai/c/ssy) (ssyglobal.com)<br>140 years of experience as a trusted independent broking partner, shaping the industry with 500 experts globally, committed to moving maritime forward | Maritime Transportation | 🇬🇧 London | 672 | 1880 |
| 14 | [Braemar](https://www.tamtam.ai/c/braemar) (braemar.com)<br>Specializing in investment, chartering, and risk management advice for the shipping and energy industries, Braemar offers integrated services for sustainable returns | Maritime Transportation | 🇬🇧 London | 598 | 1972 |
| 15 | [LOC](https://www.tamtam.ai/c/loc) (loc-group.com)<br>Global consultancy with specialists worldwide offering expertise in shipping, renewables, oil & gas, and marine sectors for urgent and complex challenges | Maritime Transportation | 🇬🇧 London | 534 | 1979 |
| 16 | [HM Coastguard](https://www.tamtam.ai/c/hm-coastguard) (gov.uk)<br>Responsible for initiating and coordinating all maritime search and rescue operations within the UK Maritime Search and Rescue Region | Maritime Transportation | 🇬🇧 Southampton | 531 | 1822 |
| 17 | [Trinity House](https://www.tamtam.ai/c/trinity-house) (trinityhouse.co.uk)<br>A maritime charity dedicated to safeguarding shipping and seafarers, providing education, support, and aids to navigation services for mariners' safety and welfare | Maritime Transportation | 🇬🇧 London | 517 | 1514 |
| 18 | [Norbulk Shipping](https://www.tamtam.ai/c/norbulk-shipping) (norbulkshipping.com)<br>Ship management company established in 1982, serving ship owner clients worldwide with ISO certification, quality management systems, and proactive approach to industry | Maritime Transportation | 🇬🇧 Glasgow | 506 | 1982 |
| 19 | [Ambassador Cruise Line](https://www.tamtam.ai/c/ambassador-cruise-line) (ambassadorcruiseline.com)<br>A new British cruise line focused on authentic, sustainable experiences, with friendly, diverse staff creating a community at sea for guests | Maritime Transportation | 🇬🇧 Purfleet | 438 | 2021 |
| 20 | [Port of London Authority](https://www.tamtam.ai/c/port-of-london-authority) (pla.co.uk)<br>A trust port operating along the River Thames, prioritizing safety, environmental protection, and promoting trade and travel for current and future stakeholders | Maritime Transportation | 🇬🇧 Gravesend | 434 | 1909 |
| 21 | [Briggs Marine](https://www.tamtam.ai/c/briggs-marine) (briggsmarine.com)<br>A leading provider of marine and environmental services with 50 years of experience, specializing in port operations, subsea support, and vessel chartering Operations worldwide | Maritime Transportation | 🇬🇧 Burntisland | 424 | 1972 |
| 22 | [Navigator Gas](https://www.tamtam.ai/c/navigator-gas) (navigatorgas.com)<br>A leading shipping company with the world's largest fleet of liquefied gas carriers, providing international transportation and distribution of LPG, petrochemical gases, and ammonia | Maritime Transportation | 🇬🇧 London | 408 | 1997 |
| 23 | [James Fisher and Sons plc](https://www.tamtam.ai/c/james-fisher-and-sons-plc) (james-fisher.com)<br>A leading provider of specialist services to marine, oil & gas, and high assurance industries worldwide, delivering solutions to technical challenges | Maritime Transportation | 🇬🇧 Barrow-in-Furness | 400 | 1847 |
| 24 | [James Fisher Subtech](https://www.tamtam.ai/c/james-fisher-subtech) (james-fisher.com)<br>Specializing in marine support for construction, O&M, and decommissioning projects in oil & gas, civil, and marine industries worldwide | Maritime Transportation | 🇬🇧 Lowestoft | 398 | 1995 |
| 25 | [S5 Agency World Ltd](https://www.tamtam.ai/c/s5-agency-world-ltd) (s5agencyworld.com)<br>Global shipping agency offering comprehensive services to charterers, ship managers, owners/operators worldwide with a focus on detail, transparency, and efficiency | Maritime Transportation | 🇬🇧 London | 392 | 2004 |
| 26 | [Global Ports Holding](https://www.tamtam.ai/c/global-ports-holding) (globalportsholding.com)<br>One of the world's largest cruise port operators, managing numerous ports globally for both cruise and commercial purposes, serving millions of passengers annually | Maritime Transportation | 🇬🇧 London | 365 | 2004 |
| 27 | [OneOcean](https://www.tamtam.ai/c/oneocean) (oneocean.com)<br>provides a comprehensive digital platform integrating people, data, and workflows to enhance maritime operations, performance, and sustainability worldwide. | Maritime Transportation | 🇬🇧 London | 357 | 1992 |
| 28 | [Sperry Marine](https://www.tamtam.ai/c/sperry-marine) (sperrymarine.com)<br>Sperry Marine offers advanced navigation solutions for commercial and defense maritime industries, ensuring efficiency, reliability, and safety worldwide with over 100 years of expertise | Maritime Transportation | 🇬🇧 New Malden | 353 |  |
| 29 | [Institute of Marine Engineering, Science & Technology (IMarEST)](https://www.tamtam.ai/c/institute-of-marine-engineering-science-and-technology-imarest) (imarest.org)<br>Global membership organization for marine professionals, offering recognition and resources to sustainably manage and develop marine resources for humanity's benefit | Maritime Transportation | 🇬🇧 London | 329 | 1889 |
| 30 | [The Nautical Institute](https://www.tamtam.ai/c/the-nautical-institute) (nautinst.org)<br>International body promoting professionalism, best practices, and safety in maritime Offers services, accreditation for training schemes, and discounts on specialist maritime books for members | Maritime Transportation | 🇬🇧 London | 326 | 1971 |
| 31 | [Wightlink \| Isle of Wight Ferries](https://www.tamtam.ai/c/wightlink-isle-of-wight-ferries) (wightlink.co.uk)<br>A leading domestic ferry operator linking the Isle of Wight to the mainland, providing easy, frequent service for residents and holidaymakers | Maritime Transportation | 🇬🇧 Portsmouth | 325 |  |
| 32 | [Port of Dover](https://www.tamtam.ai/c/port-of-dover) (portofdover.com)<br>The company operates Europe's busiest ferry port, handling up to £122 billion of trade annually, supporting jobs, and undertaking major projects for port enhancement | Maritime Transportation | 🇬🇧 Dover | 311 | 1606 |
| 33 | [Howe Robinson Partners](https://www.tamtam.ai/c/howe-robinson-partners) (howerobinson.com)<br>A global shipbroking group providing comprehensive services in tanker, containership, dry bulk, LNG, and offshore markets, with over 330 employees worldwide | Maritime Transportation | 🇬🇧 London | 300 | 1883 |
| 34 | [Merchant Navy](https://www.tamtam.ai/c/merchant-navy-london) (fleetship.com)<br>A marine services company providing officer recruitment and manning services with locations in Mumbai and Lucknow, India | Maritime Transportation | 🇬🇧 London | 225 |  |
| 35 | [W K Webster and Co Ltd](https://www.tamtam.ai/c/w-k-webster-and-co-ltd) (wkwebster.com)<br>With a legacy dating back to 1861, this company offers top-notch marine and transit claims consultancy services worldwide, focusing on quality and innovation | Maritime Transportation | 🇬🇧 Sidcup | 185 | 1861 |
| 36 | [Clyde Marine Training Ltd](https://www.tamtam.ai/c/clyde-marine-training-ltd) (clydemarinetraining.com)<br>Clyde Marine Training prepares and supports aspiring Merchant Navy Officers through comprehensive training programs, partnerships with industry leaders, and various support services | Maritime Transportation | 🇬🇧 Glasgow | 183 | 1986 |
| 37 | [Royal Institution of Naval Architects](https://www.tamtam.ai/c/royal-institution-of-naval-architects) (rina.org.uk)<br>International society for naval architects involved in ship design, construction, and repair worldwide Organizes conferences, training courses, and publishes technical journals for the maritime industry | Maritime Transportation | 🇬🇧 London | 182 | 1860 |
| 38 | [NYK Group Europe Ltd](https://www.tamtam.ai/c/nyk-group-europe-ltd) (nykeurope.com)<br>A global transportation company operating a large fleet of ocean vessels, planes, and trucks, with diverse shipping services and worldwide presence | Maritime Transportation | 🇬🇧 London | 173 | 1885 |
| 39 | [Spot Ship](https://www.tamtam.ai/c/spot-ship) (spot-ship.com)<br>technology platform offering chartering solutions to increase profitability and reduce administrative workload for shipbroking businesses | Maritime Transportation | 🇬🇧 London | 168 | 2019 |
| 40 | [Orca AI](https://www.tamtam.ai/c/orca-ai) (orca-ai.io)<br>Orca AI utilizes AI and computer vision to enhance navigation safety for merchant ships, providing real-time data and insights for better decision-making | Maritime Transportation | 🇬🇧 London | 168 | 2018 |
| 41 | [Hull Blyth Group](https://www.tamtam.ai/c/hull-blyth-group) (hull-blyth.com)<br>A British-owned ship agency with 170 years experience in West Africa, offering a wide range of services in various sectors Proud member of Multiport Ship Agencies Network | Maritime Transportation | 🇬🇧 London | 166 | 1844 |
| 42 | [Northern Lighthouse Board](https://www.tamtam.ai/c/northern-lighthouse-board) (nlb.org.uk)<br>This organization is the General Lighthouse Authority for Scotland and the Isle of Man, providing safety services to mariners through lighthouses and navigation aids | Maritime Transportation | 🇬🇧 Edinburgh | 164 | 1786 |
| 43 | [E.A. Gibson Shipbrokers](https://www.tamtam.ai/c/e-a-gibson-shipbrokers) (gibsons.co.uk)<br>International Shipbroking House offering premium services for various shipping markets including Tanker, Dry Cargo, Offshore, Gas, and Sale & Purchase Also provides consultancy and research services | Maritime Transportation | 🇬🇧 London | 164 | 1893 |
| 44 | [MDL Marinas Ltd](https://www.tamtam.ai/c/mdl-marinas-ltd) (mdlmarinas.co.uk)<br>Specialists in marina development and operations with over 40 years of experience, offering comprehensive in-house resources and expertise internationally | Maritime Transportation | 🇬🇧 Southampton | 163 | 1973 |
| 45 | [Artemis Technologies Ltd](https://www.tamtam.ai/c/artemis-technologies-ltd) (artemistechnologies.co.uk)<br>A global leader in advanced maritime design and technology, leveraging expertise from diverse industries to provide innovative solutions and products | Maritime Transportation | 🇬🇧 Belfast | 163 | 2017 |
| 46 | [INTERCARGO](https://www.tamtam.ai/c/intercargo) (intercargo.org)<br>Representing dry cargo shipowners by providing a forum for discussing regulatory challenges, safety, environmental concerns, and promoting free and fair competition in the industry | Maritime Transportation | 🇬🇧 London | 158 | 1980 |
| 47 | [Lewmar](https://www.tamtam.ai/c/lewmar) (lewmar.com)<br>Global supplier of yacht equipment, including glass, roofing systems, winches, anchoring, thrusters, hatches, and portlights for boat builders worldwide Prioritizes innovation, reliability, and customer service | Maritime Transportation | 🇬🇧 Havant | 153 | 2021 |
| 48 | [GAC UK](https://www.tamtam.ai/c/gac-uk) (gac.com)<br>Specialists in integrated shipping, logistics and marine solutions for diverse industries, with a focus on customer service, operational excellence, and delivery | Maritime Transportation | 🇬🇧 Grangemouth | 150 | 2008 |
| 49 | [Njord Offshore Ltd.](https://www.tamtam.ai/c/njord-offshore-ltd) (njordoffshore.com)<br>The company operates crew transfer vessels tailored for offshore windfarms, offering services beyond typical vessels, all classed to DNV standards | Maritime Transportation | 🇬🇧 Tendring | 149 | 2011 |
| 50 | [Clyde Marine Recruitment](https://www.tamtam.ai/c/clyde-marine-recruitment) (clyderecruit.com)<br>A leading provider of marine recruitment and crew management services worldwide Specializing in recruiting deck officers, engineers, ratings, and marine personnel | Maritime Transportation | 🇬🇧 Glasgow | 146 | 1981 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 15, 2026.

## More company lists in the United Kingdom

- [The largest companies in the United Kingdom](https://www.tamtam.ai/l/largest-companies-united-kingdom) (36,548)
- [Multinational companies in the United Kingdom](https://www.tamtam.ai/l/multinational-companies-united-kingdom) (7,458)
- [Financial services firms in the United Kingdom](https://www.tamtam.ai/l/financial-services-firms-united-kingdom) (3,711)
- [Financial Services companies in the United Kingdom](https://www.tamtam.ai/l/financial-services-companies-united-kingdom) (3,696)
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## The same list elsewhere in United Kingdom

- [Maritime Transportation companies in England](https://www.tamtam.ai/l/maritime-transportation-companies-england) (46)

## The same list elsewhere

- [Maritime Transportation companies in the world](https://www.tamtam.ai/l/maritime-transportation-companies-in-the-world) (860)
- [Maritime Transportation companies in Europe](https://www.tamtam.ai/l/maritime-transportation-companies-in-europe) (516)

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Source: https://www.tamtam.ai/l/maritime-transportation-companies-united-kingdom