Rede Sigma

Rede Sigma, branded on-air as TV Sigma (stylized as tvsigma) and 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, with additional operations being held in São Gonçalo, aside from additional owned-and-operated stations in Novo Horizonte (Minas dos Campos), Calênsia (Distrito Federal) and Arrecife (Fernambuco), being owned by Grupo Sigma.

It is the country's largest and most watched television network, although it has also been criticized for its near monopolistic dominance in the media landscape, its quality decline over the years and its bias towards the Palesian Social Democratic Party and more recently towards the Workers' Party, which the network has ironically criticized for several years since the country's redemocratization, aside for previously supporting the 1964 civic-military coup d'état, a move the network eventually came to regret.

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