- INTERSCHALT GMBH
- Intl Safety Products Ltd
- Isonell, S.L.
- Isotta Fraschini Motori SpA
- ITW Philadelphia Resins Corp
- IXSEA B.V.
- Ixsea Limited
- J A Harrison & Co (Manchester) Ltd
- J.P.SAUER & SOHN MASCHINENBAU GMBH J P
- Jahnel-Kestermann Get Bochum
- James Walker Deutschland GmbH
- Jansen Maritim GmbH & Co. KG
- Japan Radio Co. Ltd.
- Japan Radio Co., Ltd.
- JASTRAM GmbH & Co. KG
- JAURE S.A
- JFS Electronic Sturtzel & Co. AG
- Johnson Matthey Catalysts (Germany) GmbH
- JOWA AB
- JSC Leninska Kuznya
- KAHLENBERG BROTHERS COMPANY
- Kalkman Scheepstechniek BV
- KARBERG & HENNEMANN GmbH & Co. KG
- KARBOSAN Grinding Stone SAN. A.S. Inc
- Karl Dose GmbH
- Kasra Port & Shipping
- Kawasaki Precision Machinery UK Ltd
- KELVIN HUGHES
- Kelvin Hughes Nederland BV
- KET Marine BV
- Kettenfabrik Mester GmbH
- KFG-Level AG
- KGW SCHWERINER MASCHINENBAU GMBH
- KIESS GmbH & Co. KG
- KINARCA, S.A.U.
- Kistler Bw Prazisionstechnik GmbH
- KLH Montage GmbH
- KLIMAWENT Centre of Ventilation Engineering
- KLIMOR SA
- Klintsy Piston Ring Plant
- KM Europa Metal AG
- KNAACK & JAHN GmbH-Pipeline and plant construction
- Knaack & Jahn Schiffbau GmbH
- Knowsley Instrument Serv Ltd
- KOCKUM SONICS AB
- Koerting Hannover AG
- Kohler Co., Kohler Power Systems
- KOHRANG LASTIC MANUFACTURING CO.
- Kolmer Elektromotoren BV
- KOMPRESSORENBAU BANNEWITZ GmbH
- Konecranes Lifttrucks AB
- KONGSBERG SHIPMEDICS Ltd.
- Koning Technisch Bedrijf BV
- KPM Marine D E Ltd
- KRACHT GmbH
- KRANUNION GmbH - Kirow, Ardelt & Kocks are members of KRANUNION
- Kreisler Import BV
- KROHNE Messtechnik GmbH & Co. KG
- KSB ITUR Spain, S.A.
- KULA Lautenschlager GmbH & Co. KG
- Kupke & Wolf GmbH
- KURTEK VALVE INDUSTRY & TRADE CO. LTD.
- KUSDOFAN CELIK HALAT San.Tic.Ltd.Sti.
- KWANT CONTROLS B.V.
- Kyodo USA
- LAB GMBH
- LAGERSMIT
- LAMINADOS LOSAL, S.A.
- LANEX a.s.
- LANEX POLSKA Ltd.
- LASPAR DIS TICARET AS.
- Lawson Engineers Ltd
- LEC Marine Ltd
- LEHMANN & MICHELS GmbH
- Leistritz Pumpen GmbH
- LEMANS NEDERLAND BV
- LESZNO PUMP PRODUCTION PLANT Ltd.
- LIEBHERR MARITIME BENELUX BV
- Lift Emotion BV
- Lift-Tex Industrie BV
- Liftcom BV
- Lifting & Marine Services Ltd
- Linde Hydraulics
- Lindenberg-Anlagen GmbH
- LINKSrechts Ingeniergesellschaft mbH
- Loeffler Corporation
- Loggers Schwingungstechnik GmbH
- Loher GmbH
- LUBMOR Ltd.
- M.A.S. Ltd.
- M.Juergensen GmbH & Co KG
- 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
- MAHLE INDUSTRIEFILTRATION GMBH
- MAN Engines & Components UK
- Manfred J.C. Niemann - Marine Division
- Mantsbrite Marine Electr