<p>Lateral soil displacement, resulting from natural events or construction activities, can impose passive loads on nearby pile foundations, leading to additional bending moments, shear forces, deflections, and settlements that may undermine the structural stability of the foundations. This study fills a gap in understanding the combined effects of axial loading and soil movement shape on pile group behavior by exploring the performance of pile groups subjected to passive loading using a three-dimensional finite element model in PLAXIS 3D that incorporates the embedded-pile feature. The Hardening Soil model is employed to accurately simulate the stress-strain behavior of clayey soils. A series of parametric analyses was performed to assess the influence of pile geometry (length, diameter, and spacing), axial loading, moving soil layer characteristics (depth and shape), the magnitude of soil movement, and the pile group’s position relative to the movement source. The results reveal that axial loads induce significant negative bending moments at the pile head, shifting the maximum bending moment toward the sliding interface. Increasing pile spacing from 2.5D to 5D under high axial loading led to an approximate 155% increase in pile head bending moment. Larger pile diameters and closer proximity to the movement source result in higher internal forces and soil reactions. The shape of soil movement (triangular versus rectangular) significantly affects bending moment distribution, with triangular displacement profiles reducing peak bending moments by approximately 46%. These findings underscore the importance of considering both pile geometry and soil movement profiles when designing pile groups near excavations or unstable slopes, thereby enabling more efficient, safer foundation designs under passive loading conditions.</p>