M.A. Thesis:

The role of conservative accounting in the relationship between ownership structure and firm performance

The main objective of this research is to investigate the effect of accounting conservatism on the relationship between ownership structure and firm performance in Tehran Stock Exchange. Establishing appropriate corporate governance mechanisms is an essential step for optimal use of resources, enhancing accountability, transparency, fairness and the rights of all stakeholders. Each of the in-organization and outsourcing mechanisms monitors the processes and activities of the companies and promotes the accountability and achievement of other strategic goals of the company. One of these mechanisms is the concentration and ownership structure. This research was conducted for a period of 5 years between 92 and 96 years. In this study, the financial leverage and the company's size were also used as a control variable. The sample information of the companies studied after the availability of their information was gathered by using Excel software and with the help of the software Ivyz were analyzed and analyzed. The results of the research showed that there is no significant relationship between ownership concentration and company performance. But there is a positive and significant relationship between corporate ownership and institutional ownership with firm performance. The owners' right to own the property is in line with the interests of other shareholders and the cost of representation decreases, this can improve the performance of the stock companies and, on the other hand, institutional investors, shareholders They have a relative advantage in collecting and processing information. Therefore, due to the degree of flexibility and the degree of control that affects the behavior of the companies, they will strive for greater profitability and performance improvement. Also, conservatism can have a positive and significant relationship between the three variables of ownership structure (institutional, management, and ownership concentration) with the performance of companies

Keywords: Corporate Performance,Management Ownership,Institutional Ownership,Ownership Focus and Conservatism