The company Operador del mercado Ibérico de Energía-Polo Español, S.A., (OMEL), has as its main activity managing the social interests it holds, directly or indirectly, in OMIE and OMIP, S.G.M.R., market management companies, and in OMIP SGPS, OMIP S.A. OMIClear, OMEL Diversificación and MIBGAS.