Water boat IJmuiden B.V. supplies drinking water to seagoing vessels and inland shipping. In addition, the company arranges the pump work for, for example, ship ballast and fills the ship's reservoirs with demineralised water or seawater.

Waterboot Van den Bovenkamp is a company specializing in delivery of fresh water to seagoing vessels and cruise ships. The company operates a bunker boat specifically equipped for this purpose.

PK Waterbouw V.O.F. specializes on complex hydraulic engineering projects. The company provides services that include water transport and transhipment, ship towing and pushing as well as ship salvage.

Waternet is the water company that is responsible for the water of the municipality of Amsterdam.

Waternet is the only Dutch water company dedicated to the entire water cycle. For the regional public water authority Waterschap Amstel, Gooi en Vecht, the organization treats sewage water and wastewater. It also ensures the safety of dikes.

Waypoint Port Services is a worldwide port agency offering a variety of services to improve, expedite and smoothen port activities and marine logistics.

Wed. K. Brouwer Verhuur B.V. operates a tug service and rents out a variety of vessels. They include deck barges, barges and pontoons of various sizes.

Westpoort Warmte B.V. is a joint venture of Nuon Warmte and AEB Amsterdam. Nuon Warmte manages heating networks in various cities, including Amsterdam. AEB is a waste processing company and part of the municipality.

WGH Wind Groep Holland B.V. develops and manages wind turbine parks in the province of Noord-Holland. Since its establishment in 1997, the company has realized wind turbines at various locations.