In th 1960s I worked for a shipbuilding company in the north-easst of the UK and they had three 'subsidiary companies', all were long established companies. The first company made riggingg for ships, the second did coppersmiths work and small brass or iron castings for shipbuilding or other engineering companies and, I seem to remember, also some coppersmiths work for the local brewery, the third did car body repairs and also tinsmiths work and thin sheet metal work for shipbuilding.
Wearsider.