Centraalstaal BV or rather CIG Centraalstaal is a Dutch company, with headquarters in Groningen, Netherlands. It is part of Central Industry Group (CIG) a group of nine autonomous companies under two separate corporate umbrellas, located in the northern part of Germany and the Netherlands, and owned by the investment company Nimbus. Centraalstaal is currently internationally active in the shipbuilding industry, the architecture industry and the art industry.