- Underwater Lights USA, LLC (Head office)
- Uni Marine Services Pte ltd
- UNI MEBEL SC
- Unicont Spb Co., Ltd.
- Unimech Marine Equipment Sdn Bhd
- Unimor Marine
- UnionStahl Nord GmbH
- Unique Marine & Machinery Pvt Ltd
- UNIservice SAFETY srl
- Unisin Marine Equipment Co., Ltd.
- UNISPEC CORPORATION (HELLAS) LTD.
- United Generator & Engine Inc
- Unitex Group
- Universal Marine Medical - USA Office
- Universal Silencer Shanghai Co. Ltd
- UNOKS ENDUSTRIYEL MUTFAK URUNLERI SANAYI VE TICARET Ltd. Sti.
- Uralgrit LLC
- URET MECHANICAL HEAT INSTALLATION TRADE LTD
- Uson Marine Group
- Vacon Suzhou Drives Co., Ltd.
- Vaf Instruments B.V.
- Valcom S.r.l.
- VALEPORT Limited
- VALUE VALVES CO., LTD.
- Valveco logistics & services B.V.
- Valwell Development Enterprise Co., Ltd.
- VAN AALST MARINE & OFFSHORE BV
- VAN BEEST BV
- Van Bodegraven Elektromotoren B.V.
- Van der Velden Barkemeyer GmbH
- Van Leeuwen Buizen Groep
- Van Lessen en Punt Holding B.V.
- Van Leusden BV
- Van Voorden Gieterij BV
- Vanguard Composite Engineering Pte Ltd
- VANSON ENGINEERING Pvt. Ltd.
- Vardhman Enterprise
- VARHAUGS MARITIME DIESEL AS
- VDL KLIMA B.V.
- Vecom Group B.V.
- Vector Developments Ltd
- VEINLAND GmbH
- VENTILATOR - TVUS d.o.o.
- Ventiq AS
- Versitec Europe B.V.
- Vesco Plastics
- Vesper Marine Ltd.
- VESTNES Ocean AS
- VESTTEKNIKK AS
- Veth Propulsion
- VETUS
- VIBRATEC AKUSTIKPRODUKTER AB
- Vicinay Cadenas SA
- Victor Marine Ltd
- VIDEO TECHNOLOGY GROUP AS
- VIET TAN COMPANY LIMITED
- Vigan Engineering SA
- VIGOT GmbH
- VIKING LIFE-SAVING EQUIPMENT A/S
- Vimex AS
- Vinayak Trading Company
- VingCard Marine, VingCard Elsafe a.s.
- Viper Wire Rope Lubricator
- VIR VALVOINDUSTRIA ING. RIZZIO S.p.A.
- VIRA DENIZCILIK
- Virtek Communication AS
- Vistar Night Vision Ltd
- VKT MARINE
- VLACHAKIS SYSTEMS
- Voith Safeset AB
- Voith Turbo Pte Ltd
- Volcano Co Ltd
- Volvo Penta (UK)
- Vryhof Anchors B.V.
- VTE-Filter GmbH
- VULKAN Kupplungs und Getriebebau
- VUNGTAU SHIPYARD CORPORATION
- W&O Supply
- WALRICH INTERNATIONAL TECHNOLOGY,.LTD.
- WALTER STAUFFENBERG GmbH & Co KG
- WALTON ENGINEERING COMPANY Ltd.
- Wandfluh AG
- WARMAN INTERNATIONAL Ltd.
- Warren-Morrison Valves Ltd
- Wartsila (Hamworthy) Water Systems Ltd
- Wartsila (previously Cedervall (Singapore) Pte Ltd)
- Wartsila Finland Oy
- Wartsila Hamworthy Inc (Houston)
- Wartsila Krystallon Ltd
- WARTSILA Norway AS
- WATERMOTA LTD.
- Webasto Thermo & Comfort SE
- Weber Marine
- Weichai Power Co,.Ltd.
- Weicon GmbH & Co KG
- Weka Asia Pte Ltd
- Wencon ApS
- WENLING KAILUN MARINE ELECTRICAL EQUIPMENT CO.,LTD
- Wenzhou Walt fluid industry Ltd
- Wenzhou Zhenpeng Stainless Steel Co.,Ltd