- BAMAR
- BANCO Ltd.
- Bardex
- Barksdale GmbH
- BASARAN Ship Building & Repairing CO.
- BASLER ELECTRIC
- Batt Cables
- Baytek Industriesysteme GmbH
- BCB International Ltd
- Becker Marine Systems
- BEFARED S.A.
- Beier Radio
- Beijer Electronics GmbH & Co. KG
- Beldam Crossley
- Belzona Polymerics Limited
- BEMO RAIL B.V.
- Bengine Engine Repair & Trading B.V.
- BenLER International Sp. z o.o.
- Berdan Civata Sanayi A.S.
- Berg Armaturen Steuerungen GmbH
- BERG PROPULSION AB
- Bergaflex AB
- Bergan Inc, Ian-Conrad
- BESEL SA
- Besenzoni Spa
- BESI Marine Systems GmbH
- BEZALIN S.A.
- BFG Marine
- Bibby Transmissions Ltd
- Billi Dichtungstechnik GmbH
- BIO-SEA
- BIRNS, Inc.
- Bishop Lifting Products, Inc.
- Blew Stoub
- Bloctube Marine Services Ltd
- Bode GmbH
- Boening Automationstechnologie GmbH & Co KG
- BOHAMET
- Bold Nu-Tec Insulation Product
- Bolidt Synthetic Products & Systems
- Boll & Kirch Filterbau GmbH
- Bolton Gate Co Ltd
- Bopp & Reuther Messtechnik GmbH
- BORGER GmbH
- Bowlyg S B Function SRL
- Brauer Ltd
- Breman Shipping Installation
- Brevini Power Transmission S.p.a.
- Bridon Marine Systems & Servic
- Bristol Uniforms Ltd
- Britannia Marine Services
- Brooksbank Valves Limited
- BRUSH Turbogenerators
- BTM Corporate
- Buell Manufacturing Co
- Buffers Marine AB
- BURAK MARINE
- Burckhardt Compression AG
- C & C Technologies
- C'Treat Offshore Waterlink
- C-Nautical B.V.
- C.M. HAMMAR
- C.N.S. SYSTEMS AB
- C2SAT COMMUNICATIONS AB
- CA Clase (UK) Ltd
- CAC Industrial Products Ltd
- Cactus 020 Ltd
- CAFFINI PUMPS PARMA
- Calder Ltd (UK)
- Caley Ocean Systems Ltd
- Campbell Scientific Ltd.
- CAN MAKINA ELEKTRIK AS
- Capital Equipment Supply Co Ltd
- Cargo Care Solutions B.V
- CARGOMAXX
- Carlson Filtration Ltd
- CARPENTER Ltd.
- CASSENS & PLATH GmbH
- Castrol Marine Ltd
- Caterform Ltd
- CATERPILLAR Inc
- Caterpillar Marine Power Systems
- Caterpillar Propulsion Sweden (previously BERG PROPULSION AB)
- Caterpillar Propulsion Turkey (previously Berg Propulsion Istanbul Makina Ticaret LTH.STI.)
- CATHELCO GROUP
- CEDES EUROPE
- CEMP srl.
- CENTA Antriebe Kirschey GmbH
- CENTA Transmissions Ltd.
- Centork Valve Control, S.L.
- Central Industry Group (CIG)
- Cetrac GmbH
- CF HVAC 3000, S.L, Spain
- CGG VERITAS / LAND DIVISION / SWOBS
- Chase Protective Coatings Ltd,
- CHESTER MOLECULAR Ltd.
- Chevron Shipping Company LLC
- CHLOD SERVIS INT EXPORT IMPORT F.P.H.M
- CHRIS-MARINE AB
- Christie & Grey Ltd