The aim of this research is to investigate the association between the audit quality and financial reporting disclosure in Romania for the companies which adopted the International Financial Reporting Standards for the first time. Due to the fact that the year 2012 represents the year in which Romanian entities listed on the regulated market had to prepare their individual financial statements in accordance with the International Financial Reporting Standards (IFRS), the research methodology investigates the financial statements for the year 2012 for 61 companies listed on the Bucharest Stock Exchange. After conducting univariate and multivariate tests, the results indicate that in the case of Romanian listed companies, there are significant differences in terms of disclosure exposure and disclosure quality between the companies audited by a Big 4 audit firm and those audited by a non-Big 4 external auditor.