- KPM Marine D E Ltd
- Lawson Engineers Ltd
- LEC Marine Ltd
- Lifting & Marine Services Ltd
- MacGregor Marine Equipment Ltd
- MAN Engines & Components UK
- Mantsbrite Marine Electr
- MARINE COMMUNICATIONS Ltd.
- Marine Logistics Limited
- Marine Rescue Technologies Ltd
- MARITIME PROGRESS Ltd.
- Marketing Direct One
- Mayflower Engineering Ltd
- McMurdo Ltd
- Merlin Diesel Systems Ltd
- Metalast LTD
- Midcontinent (Aberdeen) Limited
- MMC (Europe) Ltd.
- MML Marine Ltd
- Mullion Manufacturing Ltd
- Norsap UK
- NORTHBRIDGE INDUSTRIAL SERVICES PLC
- Norwest Marine Ltd
- NRG Marine Limited
- NSSLGlobal Ltd
- Ocean Engineering (Fire) Ltd
- Ocean Safety Ltd
- Olaer Fawcett Christie (previously Fawcett Christie Hydraulics Ltd.)
- Outreach Ltd
- Petrochem Pipeline Supply Ltd
- Phoenix Hydraulics
- Pilgrim International Limited
- Plain Sailing Communications Ltd.
- Point Distribution Limited
- Portmere Rubber Ltd
- Precision Polymer Engineering Ltd.
- Quality Monitoring Instruments
- R&D Marine Ltd
- Rayco-Wylie Systems
- RESMAR LTD
- Rheintacho UK Ltd.
- RICOEurope Ltd
- RIVERTRACE ENGINEERING Ltd.
- Robinson & Liddell Ltd
- ROLLS-ROYCE PLC.
- ROWAN & BODEN MARINE Ltd.
- RS Aqua Ltd
- Scotgrip (UK) Ltd
- Seafresh Desalinators Ltd
- Seaglaze Marine Windows Ltd
- Seasafe Systems
- Shelquip Ltd
- Shipham Valves Ltd
- Ships Electronic Services Ltd
- Sleev-it Fire Systems Limited
- Smith Flow Control Ltd.
- SOLAR SOLVE MARINE
- Star Instruments Ltd
- Stone Marine Propulsion Limited
- STT International Ltd.
- SURVITEC GROUP LIMITED
- TAV Engineering Ltd
- TECHFLOW MARINE Ltd.
- Teekay Couplings Ltd.
- Teignbridge Propellers International Ltd
- TENMAT Ltd.
- Tideland Signal Ltd
- Tides Marine International Limited
- Total Filtration Ltd
- TQ Enviromental Plc
- Trimat Ltd
- Tritex NDT Ltd
- Tufnol Composites Ltd
- Tyne Gangway (Structures) Ltd
- Tysons Ships Riggers
- VALEPORT Limited
- Vector Developments Ltd
- Victor Marine Ltd
- Volvo Penta (UK)
- WALTON ENGINEERING COMPANY Ltd.
- Warren-Morrison Valves Ltd
- Wartsila (Hamworthy) Water Systems Ltd
- Wartsila Krystallon Ltd
- WATERMOTA LTD.
- Wiper Solve Marine Ltd.
- WIRED OCEAN LIMITED
- Wolf Safety Lamp Co Ltd
- Woodsons of Aberdeen Ltd
- Worldwide Marine and Industrial Spares
- Young & Cunnigham Eddie Spence
- Zeework Ltd