Density (by gamma-absobtion method) and electrical resistivity (by contact-less method in rotating magnetic field) of Al–Ni–Co–Ce glass-forming alloys with different ratios of transition metals are investigated. The existence of a wide two-phase region and jump-like variations of the properties at solidus and liquidus temperatures is found. Increasing of cobalt contnet from 2 to 4 at % leads to 2% decrease of density and 3% increase of electrical resistivity in crystalline and liquid states. The temperature coefficients of change in properties are calculated. Density hysteresis is found to appear upon overheating of the melts above 1350 K. This fact is related to the decomposition of large-scale microinhomogeneities existing in the melts upon heating. The obtained results can be used for optimizing the production processes of rapidly-quenched alloys. © 2023, Pleiades Publishing, Ltd.