Distribution of stellar masses (in M_⊙) of our sample obtained with 2SPD. The solid line represents the sample of radio galaxies selected in this work: the filled histogram represents the FR II HPs, the cross-hatched histogram represents the remaining HPs, the back-slash shaded histogram represents the FR II LPs, and the empty histogram represents the remaining LPs. The red dashed histogram corresponds to the entire COSMOS RL AGN sample at high redshifts, which includes the sample selected by C09 and studied by B13.