Elia Group includes two TSOs: Elia Transmission Belgium and 50Hertz Transmission in Belgium.
RTE is a TSO. It owns and operates the power grid in France.
GCCIA is a regional TSO, it owns, maintains, and operates the power grid connecting GCC Countries in Gulf States.
Eskom is a state owned utility operating the power grid in South Africa.
KPX is a system operator that manages the power grid and the electricity market in South Korea.
MISO is an RTO that manages the power grid in the center states in U.S.A.