Strong international integration and globalization affects the contemporary world´s economy which has influence in development of movement of capital, financial markets and decision making of each business entity. Because of increased force to comparability between companies, the idea of one single-setting globally accepted financial reporting standards was started in 1973 in London by International Accounting Standards Committee (IASC) as a standards setter of International Accounting Standards (IAS). In the year 2000 the International Organization of Securities Commission (IOSCO) recommended to use IFRS for all their members. The paper states about Prague Stock Exchange (PSE) as a member of IOSCO, its index PX and companies which create the index PX. The index base is composed of 14 companies which reported their financial statements in accordance with International Financial Reporting Standards (IFRS, earlier IAS). The aim of the paper is to briefly introduce Prague Stock Exchange and index PX and to evaluate the chosen disclosure requirements of companies which create the index. The disclosure requirements, which are assessed are chosen from IAS 1: Presentation of Financial Statements and IFRS 8: Segments reporting. Research of disclosure requirements has been done by gathering the financial statements from years: 2011 and 2012 and assessment of chosen question is based on disclosure requirements of IAS 1 and IFRS 8. Those standards were chosen because of the wide range of companies. The next part of research is to assess the development between the compared years.