41.20.Z - Building works related to erection of residential and non-residential buildings
42.22 - Construction of utility projects for electricity and telecommunications
42.99 - Construction of other civil engineering projects n.e.c.
43.21 - Electrical installation
43.22 - Plumbing, heat and air-conditioning installation
43.29 - Other construction installation
68.10 - Buying and selling of own real estate
71.12 - Engineering activities and related technical consultancy
77.40 - Leasing of intellectual property and similar products, except copyrighted works
82.11 - Office administrative service activities