Thermosetting molding compounds feature a high material and substitution potential for high temperature thermoplastics in technical applications due to their excellent thermo-mechanical properties. As a result of their high filling rates up to 80 percent (fibers, beads, particles) their mechanical properties are mainly dominated by the fillers. For example, particles with an aspect ratio (fibers) can cause an anisotropic behavior due to their process-induced orientation. The orientation of the fillers is among others a result of the viscosity depending on time, temperature and shear rate. The aim of this study is to determine the rheological properties of highly filled thermosetting molding compounds. An oscillating plate-plate-rheometer was used to examine the rheological behavior within the range of low shearing rates of a phenolic molding compound by varying the degree of filling and content of water.