The purpose of this study is to explain the change that occurs in the capital structure when a company goes public and to review whether there are any possible factors and theories who can explain the change. The data has been collected using a quantitative approach, the data comes from companies that were listed on the Nordic market between the years 2014-2017. This has later been used to analyze in relation to previous research and theories. Using statistical models and methods as tools, the conclusions have been drawn that the debt ratio falls during the year the IPO is made and then increases during the following years after the IPO. These conclusions have been able to be drawn since there is statistical significance in the statistical models used to analyze this.