- Marine Technic
- Marine Technologies LLC
- MARINELEC
- Mariner Ship's Equipment (Germany) GmbH
- MarineShaft Hirtshals A/S
- Marinfloc AB
- MARIT SA
- MARITEAM A/S
- MARITIME MOBLER AS
- MARITIME MONTERING AS
- MARITIME PROGRESS Ltd.
- Marketing Direct One
- MARLINK AS
- MARTIN BRUUSGAARD & Co. AS
- Maschinenfabrik Wagner GmbH & Co. KG
- MASSON MARINE SAS
- Maxwell Marine Europe
- Mayflower Engineering Ltd
- Maynards Europe GmbH
- MBT GmbH
- McMurdo Ltd
- MCT BRATTBERG AB
- MEDI3 MARINE
- MEDIACOM München GmbH
- MEGACON AS
- MEKANORD A/S
- Merlin Diesel Systems Ltd
- MESON AB
- Metalast LTD
- Metaloterm Ontop B.V.
- Micfil Ultra fine Filters LTD
- Midcontinent (Aberdeen) Limited
- Miko Marine AS
- Minimax GmbH
- Minks Kunststoftechniek BV
- mk-marine GmbH
- MMC (Europe) Ltd.
- MML Marine Ltd
- MODELL MOBLER AS
- MOELLER GmbH
- Mohring GmbH
- Momec AB
- MOORLINK AB
- Mullion Manufacturing Ltd
- MUPRO Maritim
- N2 SAFETY BV, MPI Ltd.
- Nautikaris BV
- NAVTEAM A/S
- NetWave Systems BV
- Neuenfelder Maschinenfabrik GmbH
- NEUENHAUSER KOMPRESSORENBAU GmbH
- New Deal Seals
- NewThex BV
- NIBAS AGENCIES
- NileDutch
- Nitto Kohki Deutschland GmbH
- Nogva Motorfabrikk AS
- Nora systems GmbH
- NORAC AS
- Nordtec Service ApS
- Noris Marine Systems
- NORISOL AS
- NORLAU A/S
- NORMA Group Holding GmbH
- Norsafe Selantic As
- NorSap as
- Norsap UK
- Norselight AS
- NORSKE BACKER AS
- NORTHBRIDGE INDUSTRIAL SERVICES PLC
- Norwest Marine Ltd
- NOV-BLM
- Novenco Marine & Offshore A/S
- NRG Marine Limited
- NSI
- NSSLGlobal Ltd
- Observator Instruments
- Ocean Clean GmbH
- Ocean Engineering (Fire) Ltd
- Ocean Safety Ltd
- OFFSHORE & TRAWL SUPPLY AS
- Olaer Fawcett Christie (previously Fawcett Christie Hydraulics Ltd.)
- OLEUS BV
- Omerin
- Omicron AS
- Optimarin AS
- Orbitalum Tools GmbH
- Orts GmbH Maschinenfabrik
- Outreach Ltd
- OWRE-JOHNSEN AS
- OXYMAT AS
- PALFINGER MARINE NETHERLANDS BV (previously Palfinger Ned Deck)
- Palfinger Marine Norway AS
- Parat Halvorsen AS
- Perlwitz Armaturen GmbH
- Peter Cremer GmbH
- Petrokraft AB
- Phoenix Hydraulics
- Pilgrim International Limited
- Pintsch Bubenzer GmbH