all of them are affiliated with the aescrj, the association of samba schools from the city of rio de janeiro. 

samba schools in groupo c have more stringent requirements than group d, as they need to have two allegories, 13 wings, an orchestra, baianas, and a front commission.

listed below are some of the schools that have been part of grupo c, however an updated list can be found on the aescrj official website, on this link.