Company lists · Data refreshed September 2026

Top 25 Marine transmission companies based in the United Kingdom

Name: Marine transmission companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 87 companies tracked

RevenueBase identified 87 marine transmission companies headquartered in the United Kingdom as of September 2026 and tracks 1,033 professional contacts across them, including 305 with verified work emails. London is the largest hub.

This list covers marine transmission companies headquartered in the United Kingdom, 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 20, 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 20, 2026 86% judged on-target in blind review

87Companies

1,033Contacts tracked

305Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest marine transmission companies based in the United Kingdom

Ranked by team size

Top 25 of 87 marine transmission companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine transmission 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Mitchell Powersystems	Strong evidence	Nottinghamshire, United KingdomHQ checked Sep 20, 2026	51-200	87 contacts →
	Strong evidence “Mitchell Powesystems specialise in the supply, overhaul and repair of industrial & Marine Diesel Engines, Allison Automatic Transmissions, Off-Highway Driveline Products and the…” Source: RevenueBase Database · checked Sep 20, 2026
2	Caudwell Marine	Partial evidence	Coventry, United KingdomHQ checked Sep 20, 2026	51-200	84 contacts →
	Partial evidence “Caudwell Marine was founded to bring a new standard of diesel outboard technology to the marine industry.” Source: RevenueBase Database · checked Sep 20, 2026
3	Royston	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 20, 2026	51-200	68 contacts →
	Partial evidence “Royston are a dynamic and expanding diesel engine supply, service and repair company operating successfully within the marine, offshore, industrial, defence and rail sectors for…” Source: RevenueBase Database · checked Sep 20, 2026
4	Wärtsilä Shaft Line Solutions	Partial evidence	Havant, United KingdomHQ checked Sep 20, 2026	501-1,000	63 contacts →
	Partial evidence “Wärtsilä Shaft Line Solutions is Wärtsilä's end-to-end marine shaft line product and service provider, leading the industry in the design, manufacture, and servicing of equipment.” Source: RevenueBase Database · checked Sep 20, 2026
5	MIT Group	Indirect evidence	Queenborough, United KingdomHQ checked Sep 20, 2026	51-200	42 contacts →
	Indirect evidence “MIT The Drivetrain Experts Land or Sea, we keep you driving.” Source: RevenueBase Database · checked Sep 20, 2026
6	Harland & Wolff	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	27 contacts →
	Partial evidence “Building on around 160 years of marine manufacturing experience, Harland & Wolff offers a unique combination of vast facilities and technical capability.” Source: RevenueBase Database · checked Sep 20, 2026
7	PRM Newage LTD	Indirect evidence	Coventry, United KingdomHQ checked Sep 20, 2026	51-200	20 contacts →
	Indirect evidence “With a precision engineering pedigree, PRM Newage Ltd has established an enviable reputation as a specialist in the design and manufacture of high efficiency mechanical driveline…” Source: RevenueBase Database · checked Sep 20, 2026
8	CJR Propulsion	Partial evidence	Southampton, United KingdomHQ checked Sep 20, 2026	11-50	18 contacts →
	Partial evidence “As the marine industry has developed and the demand for highly efficient, performance products has continued to grow, CJR has emerged to become one of the UK’s most respected…” Source: RevenueBase Database · checked Sep 20, 2026
9	Allen Gears	Partial evidence	Pershore, United KingdomHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “Allen Gears is a world leader in the design and manufacture of high performance gearboxes for industrial and marine applications.” Source: RevenueBase Database · checked Sep 20, 2026
10	Ocean Marine Systems OMS LTD	Partial evidence	Christchurch, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “Ocean Marine Systems (OMS) offer specialist engineering and manufacturing of marine instrument deployment products, the OYS range of bow thrusters, vessel propulsion systems and…” Source: RevenueBase Database · checked Sep 20, 2026
11	Simplex Turbulo	Partial evidence	Andover, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “Simplex Turbulo Co Ltd is a maritime company based out of Andover, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
12	Hatlapa Marine Equipment	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 20, 2026	1,001-5,000	13 contacts →
	Indirect evidence “In October 2013, MacGregor acquired Hatlapa to strengthen its position in the merchant shipping segment with a product portfolio that contained a wide range of deck machinery.” Source: RevenueBase Database · checked Sep 20, 2026
13	PME Power Systems Group Limited	Partial evidence	Plymouth, United KingdomHQ checked Sep 20, 2026	11-50	11 contacts →
	Partial evidence “PME Power Systems Group Ltd is the UK and Ireland importer for MAN marine engines and spare parts, supplying advanced propulsion and power solutions to the marine industry.” Source: RevenueBase Database · checked Sep 20, 2026
14	Beta Marine Limited	Partial evidence	Quedgeley, United KingdomHQ checked Sep 20, 2026	11-50	11 contacts →
	Partial evidence “Since 1987 Beta Marine has developed an enviable reputation for providing quiet and smooth running marine diesel engines and generating sets to suit a wide range of applications.” Source: RevenueBase Database · checked Sep 20, 2026
15	STM Engineering Limited	Partial evidence	Great Yarmouth, United KingdomHQ checked Sep 20, 2026	11-50	11 contacts →
	Partial evidence “Marine Engineering Company trading since 1985 Specialists in Marine Diesel – Low, Medium and High Speed.” Source: RevenueBase Database · checked Sep 20, 2026
16	A R Peachment Limited	Partial evidence	Brundall, United KingdomHQ checked Sep 20, 2026	11-50	10 contacts →
	Partial evidence “A R PEACHMENT LIMITED is a maritime company based out of Riverside Estate, Brundall, England, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
17	Mackay Marine Services Limited	Partial evidence	Aberdeen, United KingdomHQ checked Sep 20, 2026	1-10	10 contacts →
	Partial evidence “Founded in 1988 Aberdeen based Mackay Marine Services are expert marine and boat technicians.” Source: RevenueBase Database · checked Sep 20, 2026
18	Proteum	Partial evidence	Southampton, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “Proteum is a UK based marine distributor with offices in Southampton.” Source: RevenueBase Database · checked Sep 20, 2026
19	MPE LTD	Partial evidence	Burton Upon Trent, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Partial evidence “MARINE AND POWER ENGINEERING LIMITED We are an industry specialist supporting all aspects of- Marine Engineering - Power Generation - Controls - Parts Supply for all Manufacturers…” Source: RevenueBase Database · checked Sep 20, 2026
20	Seadock Marine Agencies LTD	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	6 contacts →
	Partial evidence “SeaDock Marine Agencies, established in 2015, is an international maritime solutions provider with offices in London and Piraeus and a global network of trusted partners and…” Source: RevenueBase Database · checked Sep 20, 2026
21	James Troop Marine And Industrial Engineering	Indirect evidence	Runcorn, United KingdomHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “James Troop & Co Ltd was established in 1867 developing over 150 years to become a leading supplier of diesel and gas engine spare parts, servicing and engine sales to both the…” Source: RevenueBase Database · checked Sep 20, 2026
22	Marine Machine UK Limited	Partial evidence	Southampton, United KingdomHQ checked Sep 20, 2026	1-10	6 contacts →
	Partial evidence “Marine Machine UK ltd specialise in the overhaul, repair & service of medium & high speed diesel & gas engines.” Source: RevenueBase Database · checked Sep 20, 2026
23	Involution Technologies	Indirect evidence	Royal Leamington Spa, United KingdomHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “INVOLUTION TECHNOLOGIES Limited (InvoTech) is a gearbox design company primarily focused in the WIND / TIDAL turbine and Electric Vehicle gearbox and drivetrain design sector.” Source: RevenueBase Database · checked Sep 20, 2026
24	Watermota	Partial evidence	Heathfield, United KingdomHQ checked Sep 20, 2026	51-200	5 contacts →
	Partial evidence “WaterMota has been supplying the marine industry with engine room packages since 1911.” Source: RevenueBase Database · checked Sep 20, 2026
25	Marine Components International	Partial evidence	Poole, United KingdomHQ checked Sep 20, 2026	1-10	5 contacts →
	Partial evidence “Marine Components International is a World Leading Marine Equipment Distributor based in Poole, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: marine transmission companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names marine transmission companies.
Partial evidence: Its own public description names part of marine transmission companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine transmission companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 87 marine transmission companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 305 reachable decision-makers.

Free signup · no credit card

View the full list →

Marine transmission companies based in the United Kingdom at a glance

As of Sep 20, 2026

29.5%Verified-email coverage

11.9Average contacts per company

1-10Median size (employees)

9.2%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 87 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 marine transmission 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 the United Kingdom whose own description of what they do matches “marine transmission 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 marine transmission 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 marine transmission companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 305 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 20, 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 marine transmission 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 marine transmission companies are there based in the United Kingdom?

RevenueBase identified 87 marine transmission companies headquartered in the United Kingdom 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?

Mitchell Powersystems, headquartered in Sutton-In-Ashfield, tops this list with the largest team on record.

Which city has the most marine transmission companies?

London leads with 8 headquartered companies, followed by Southampton (4) and Brixham (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 305 verified decision-maker contacts tracked across these 87 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 87 marine transmission companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Marine transmission companies by geography

Browse the directory

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.