Investigation of Relationship between Ownership Concentration and Auditing Fees in listed firms of Tehran Stock Exchange

This study investigates the relationship between ownership concentration and auditing fees of listed companies in Tehran Stock Exchange. The level and nature of external audit fees requested by organizations, depends on three descriptive elements such as the firm size, complexity of operations and audit risk. Researches indicated that ownership structure of company as one of the key components of corporate governance can impact on audit fees through impacting on these three descriptive elements. Since every classes of investors have different goals and motivations for their investment; in this investigation, the Ownership concentration, as two effective group of shareholders in ownership structure, was investigated from the two aspects of Institutional and managerial; and 114 listed companies in Tehran Stock Exchange in a period of 2007-2012 years were chosen as a sample. This study is descriptive correlation based on panel data analyzing, the results showed that the negative relation between institutional ownership concentration factor with the audit fee and a negative relation between concentration factor in the company's board of directors and the auditing fee is accepted in Tehran Stock Exchange.