Club Baloncesto Estudiantes, S.A.D., (English: Club Basketball Students) known simply as Estu and as Movistar Estudiantes for sponsorship reasons, is a basketball team based in the city of Madrid, Spain. It is a member of the Asociación de Clubes de Baloncesto (ACB). Founded in 1948, it is one of the most recognized basketball teams in Spain.

Some of its achievements include winning three Spanish Cups