This study aims to analyze the effect of firm size, institutional ownership, public ownership, and Islamic social reporting on firm value. In this study, the value of the company is calculated using PBV (Prcie Book Value). The population in this study are companies that are included in the Jakarta Islamic Index listed on the Indonesia Stock Exchange (IDX) in 2016-2019. Sampling was done by purposive sampling technique and obtained a sample of 21 companies with 84 annual reports as observation material. The analytical method used is a multiple regression model using the Statiscal Package for Social Sciences (SPSS) program. The results of this study prove that institutional ownership, public ownership, and Islamic social reporting have no effect on firm value, while firm size has a positive effect on firm value.