Steel shear walls are frequently employed in seismically resilient steel structures to enhance the efficacy of structural systems. In the elastic range, steel shear walls can buckle because of their unique shape. One kind of resistant structure is a composite shear wall, which is made up of layers of reinforced concrete and steel plates. This structure needs to combine the properties of ductility, stiffness, and strength. A steel plate in a shear wall improves system seismic performance by increasing stiffness, energy dissipation, load-bearing capacity, and preventing steel plate fracture. The purpose of this research is to find out how to use composite shear walls to make the system more seismically resistant and to prevent the steel plate from collapsing. 25 full-scale models of shear walls made of steel and composite materials, measuring 5 meters in length and 3.5 meters in height, were created for this specific purpose. Openings in the shear wall significantly influence its structural behavior. In this study, the behavior of the composite shear wall was examined using nonlinear static analysis. The variables of interest were ultimate strength, dissipated energy, stiffness, and ductility coefficient. Various factors are considered, including the steel plate's thickness (with values of 10, 12, and 15 mm), the kind and percentage of aperture, and whether or not the steel plate is covered with reinforced concrete. According to the results, a reduction of 18–83% in strength, 15–71% in dissipated energy, 20–91% in stiffness, and 20–28% in ductility coefficient occurs as the proportion of aperture in the composite shear wall increases.