Rede Sigma

Rede Sigma, commonly known as just Sigma, is a Palesian commercial television network, being launched on April 26th, 1965 by businessman and journalist Norberto Moitinho, then-owner of sister newspaper O Sigma and sister radio station Rádio Sigma.

It is headquartered in Rio de Sineiro, making it the only major television network in the country to be headquartered in that city rather than São Gonçalo, with additional operations being held by its owned-and-operated station in São Gonçalo, aside from additional owned-and-operated stations in Calensia (Distrito Federal), Novo Horizonte (Minas dos Campos) and Arrecife (Fernambuco), being owned by Grupo Sigma.

It is the country's largest and most watched television network, although it has also being criticized for its near monopolistic dominance in the media landscape, its quality decline over the years and its news department's bias towards the Palesian Social Democracy Party (previously holding a political bias towards the Palesian Military Regime until its dissolution in 1985).

Its primary competitors are TelecordTV, EPT, Rede Viseirantes, Telerede and TV Educativa.