In this talk I will discuss superconformal theories in four dimensions obtained wrapping M5 branes on a Riemann surface. These include the models studied holographically by Bah, Beem, Bobev and Wecht some years ago. I will propose a direct four dimensional construction of these theories and discuss their chiral ring. Furthermore, these theories can be described by a spectral curve which encodes information about the moduli space of the theory. I will explain how to extract it and how it can be used to determine the R-symmetry of the theory.
