The primary objective of this study is to explore the correlation between managerial ownership and institutional ownership in relation to firm performance. Additionally, it seeks to investigate the mediating role of company size in this association. The methodology employed in this research involves path analysis, analyzing a dataset comprising 129 research entries. The findings from the data analysis reveal a positive impact of managerial ownership, institutional ownership, and firm size on firm performance. Conversely, managerial ownership and institutional ownership exhibit a negative influence on firm size. Furthermore, company size acts as a mediator in the relationship between managerial ownership and firm performance, as well as between institutional ownership and firm performance. From a practical standpoint, it is recommended that companies formulate ownership policies that motivate managers to commit to long-term performance, taking into account the impact of company size in strategic decision-making. While this study provides valuable insights, it is essential to acknowledge its limitations, particularly in terms of sample size and the time frame considered, which could serve as areas for future research.