ABSTRACT : This study aims to examine the impact of ownership structure on accounting conservatism among the Gulf Cooperation Council (GCC) countries' publicly listed firms. By using the regression model, the results showed a significant association between the firms' ownership structure variables (i e. foreign ownership and largest shareholder ownership) and accounting conservatism. This study contribution to the literature is as follows: it examines the relationship between ownership structure and accounting conservatism for five years (2016-2020) and provides new evidence on the importance of the ownership structure variables and their impact on the firm's accounting conservatism in emerging stock markets. The results of this study are undoubtedly of great interest to the regulatory bodies, shareholders, and governments in the GCC countries. Also, the results of this study can be used as a guideline by the stakeholders to set a sound and efficient ownership structured that can support the organization in minimizing the agency problem. The study findings can provide a valuable insight to the shareholders in GCC countries and aid in understating the impact of different ownership structure on accounting conservatism. Keywords: Accounting Conservatism, Ownership Structure, Foreign Ownership, Largest Shareholder Ownership, managerial ownership, GCC Countries