NSC stellar mass to galaxy stellar mass relation (top) and NSC-to-galaxy mass ratio vs. galaxy stellar mass (bottom) for the MATLAS NSCs from this work (black open circles), LV (blue dots), Virgo (orange triangles), Fornax (red crosses), and LTG (light blue crosses) photometry-based sample from Sect. 6.1. We computed the running average of log M${}_{*}^{\mathrm{NSC}}$ in bins with a width of 1 dex and a moving step size of 0.2 dex in log M${}_{*}^{\mathrm{gal}}$ considering all the NSCs (black solid line). In the bottom plot, we compare the running average to Eqs. (1) (purple dashed line) and (2) (purple line) of Neumayer et al. (2020), as well as the relation found for ETGs in Scott & Graham (2013) (purple dotted line) and dEs in Graham & Guzmán (2003) (gray line; with dashed lines for the errors). The error bars (lower right corner) represent the median uncertainties.