National Iranian Oil Co
Pars Oil & Gas Co
Petro Pars Ltd
Iranian Oil Pipeline Tele communication Co
South Pars Gas ComplexCo
Iran Central Regions Oil Company
Iranian Gas Engineering & Development Co
North Khorasan Gas Co
Bandar Imam Petrochemical Co
Oil Design and Construction Co
Lorestan Petrochemical Co
Persian Gulf Apadana Petrochemical Co
Sepehr Lavan Ghotb Petrochemical Co
Industrial projects Management of Iran's Co
Lavan Industry Development Co
Ab Nirou Co
MEKPCO
LZIPC
Nargan Co
Baravand Co
EPOC