Problem: After several corporate scandals concerning accounting around the world a discussion concerning corporate governance arose. The public demanded greater insight and better corporate governance in public companies. The discussions led to the development of codes of corporate governance, codes such as the Sarbanes Oxley Act, the Combined Code and the Swedish Code of Corporate Governance. The Swedish code is a clarifying of the Swedish law, a codification of praxis and in some cases an increase in the demands on reporting of information from the companies.Purpose: The purpose of the thesis is to describe what effects the Swedish Code of Corporate Governance has had on the content of annual reports of listed companies and if different types of companies have been affected in different ways.Method: The investigation was conducted using both qualitative and quantitative methods. Through a preliminary study knowledge about the subject was gathered.