- Lanxi Yibu lighting Co.,Ltd
- LASPAR DIS TICARET AS.
- LAUREL GATHER CORP.
- LAUTEX AB OY
- Lawson Engineers Ltd
- LEC Marine Ltd
- LEHMANN & MICHELS GmbH
- Leistritz Pumpen GmbH
- LEMANS NEDERLAND BV
- LESZNO PUMP PRODUCTION PLANT Ltd.
- LIDO MARINE
- LIEBHERR MARITIME BENELUX BV
- Lift Emotion BV
- Lift-Tex Industrie BV
- Liftcom BV
- Lifting & Marine Services Ltd
- Lifton Magnets Pte Ltd.
- Liftra ApS
- Linde Hydraulics
- Lindenberg-Anlagen GmbH
- LINKSrechts Ingeniergesellschaft mbH
- Lion Rubber Industries Pvt. Ltd.
- Littelfuse SELCO A/S
- Lo-Rez Vibration Control Ltd
- Loeffler Corporation
- Loggers Schwingungstechnik GmbH
- Loher GmbH
- LOIPART LTD
- LOLO PIPELINE COMPANY Ltd
- LONNE SCANDINAVIA AS
- Look-In-Marine
- Lopolight ApS
- LOTEK A/S
- LOYAL MARINE MANAGEMENT LTD
- LSM Pumper
- LUBMOR Ltd.
- Luoyang Ship Material Engineering Corporation
- LYNGSO MARINE A/S
- M A Corporation
- M Harakhji & Sons
- M.A.S. Ltd.
- M.Juergensen GmbH & Co KG
- M.SARKAR & BROTHERS
- M/S. BENZEAR EQUIPMENTS INDIA (P) LTD
- MacArtney A/S
- MacGregor HYDRAMARINE AS
- MacGregor Marine Equipment Ltd
- Machine- & Lierenfabriek C. Kraaijeveld BV
- Machinefabriek L. Straatman BV (Formerly Van de Graaf's werktuig en constructiebouw)
- Machinefabriek Luyt BV
- MACOR Marine GmbH
- MAE IL MARINE SERVICE Co. Ltd.
- MAGISTR SIA
- Magotteaus
- MAHLE INDUSTRIEFILTRATION GMBH
- MAN B&W DIESEL A/S
- MAN Engines & Components UK
- Manabe Zoki Co., Ltd.
- Manfred J.C. Niemann - Marine Division
- Manly Marine Closures Ltd
- Mantsbrite Marine Electr
- Marac Electronics SA
- Marco Marine A/S
- MARE SAFETY AS
- Mareflex GmbH
- MAREL ELECTRONICS S.A.
- MARES SHIPPING GmbH
- MarFlex - Hong Kong
- Marflex B.V.
- Marinall
- MARINE ALUMINIUM AS
- MARINE COMMUNICATIONS Ltd.
- MARINE CONTROL SERVICES AS
- MARINE DEPOT LIMITED
- Marine Digital Co.,Ltd.
- Marine Equipment & Sevices Co.Ltd
- MARINE EXHAUST SOLUTIONS (MES)
- MARINE INDUSTRIAL CONTROL SYSTEMS
- MARINE LINE COATING San.ic ve Dis Tic.A.s.
- Marine Logistics Limited
- Marine Motor Service GmbH
- MARINE NAVIGATION SYSTEMS
- Marine Rescue Technologies Ltd
- Marine Service Jaroszewicz s.c.
- MARINE SPARES BANGLADESH
- Marine Technic
- MARINE TECHNICS
- Marine Technologies LLC
- MARINE WORKS
- MARINELEC
- Marinequip China Co., Ltd.
- Mariner Ship's Equipment
- Mariner Ship's Equipment (Germany) GmbH
- MarineShaft Hirtshals A/S
- Marinfloc AB
- MARIOFF CORPORATION OY
- Mariso
- MARIT SA
- MARITEAM A/S
- MARITIME MOBLER AS