Identified companion candidates to the targets identified for the kernel-nuller discovery observing program. These 38 targets are derived from the PMa catalogue (Kervella et al. 2022) of HIPPARCOS and Gaia EDR3 astrometry. The companion contrast c is presented as a function of the angular separation, which is given by the ratio between the semimajor axis (assumed to be 5 AU) and the distance to the system. The colour of the markers indicates the declination angle of the target system and the size depicts the mass of the companion (M_Jup).