This thesis investigates the origin, stability, and cosmological relevance of Kinematically-Persistent Planes (KPPs) of satellite galaxies around disk galaxies within the ΛCDM framework. Using high-resolution zoom-in simulations and the large-volume TNG50 simulation, we identify and characterize KPPs as coherent satellite structures linked to early anisotropic mass accretion along the Cosmic Web. The analysis shows that KPPs are long-lived, dynamically stable features, emerging during the fast mass assembly phase of galaxies and shaped by large-scale environmental flows. These results suggest that satellite planes are fossil imprints of early structure formation, offering new insights into galaxy evolution and testable predictions for future observations.