06.20.Z - Extraction of natural gas
09.10.Z - Support activities for petroleum and natural gas extraction
35.22.Z - Distribution of gaseous fuels through mains
35.23.Z - Trade of gas through mains
41 - Construction of residential and non-residential buildings
43 - Specialised construction activities
49.50.A - Pipelines transportation of natural gas" or "gas pipeline transportation
62 - Computer programming, consultancy and related activities
68.10.Z - Buying and selling of own real estate
68.20.Z - Rental and operating of own or leased real estate
68.31.Z - Intermediation service activities for real estate activities
68.32.Z - Management of real estate on a fee or contract basis
70.22.Z - Business and other management consultancy activities
71.11.Z - Architectural activities
71.12.Z - Engineering activities and related technical consultancy
74.90.Z - Other professional, scientific and technical activities not elsewhere classified
91.03.Z - Operation of historical sites and buildings and similar visitor attractions