• National Iranian Gas Company—NIGC
  • National Iranian Gas Transmission Company—IGTC
  • Fajr Jam Gas Refinery (the largest gas refinery in Asia & the 2nd largest in the world)
  • Natioanl Iranian Oil Pipeline & Telecommunication Company—IOPTC
  • National Iranian Offshore Oil Company—NIOOC
  • National Iranian Oil Company—NIOC
  • Parsian Gas Refinery (2nd largest refinery in Iran & 6th in the world)
  • South Pars Gas Company—SPGC
  • National Iranian South Oil Company—NISOC
  • Nardis Company
  • Iranian Offshore Oil Company—IOOC