Royal Boskalis Westminster N.V. is a Dutch dredging and heavylift company that provides services relating to the construction and maintenance of maritime infrastructure internationally. 

Boskalis (Bos & Kalis) was founded as Johannes Kraaijeveld en van Noordenne in 1910 by Johannes Kraaijeveld and Elizabeth van Noordenne.

The company has one of the world's largest dredging fleets, a large stake in Smit International and owns Dockwise, a large heavylift shipping company.

As of 2018, Boskalis employs around 10,700 employees and 900 ships. They operate in over 75 countries in six continents.

According to en.wikipedia