- Managing director: Mark Kelly
- Pre-tax profit: £4.6m
- Employment: 207
- Pay bill: £7.9m
Whitemountain Quarries, based in Belfast, is one of the larger wholly owned subsidiaries of Lagan Group Holdings, chaired by Kevin Lagan, and registered in the Isle of Man.
This company is a market leader in contracting to provide quarry materials, surfacing and highway maintenance with civil engineering services both locally in Northern Ireland and in other European markets.