The subject of the diploma thesis „Risk analysis in the process of acquisitions and mergers“ is the issue of risk analysis in the process of business combinations from the point of view of the most frequently occurring risks including the quantification and suggest possible measures leading to improve their management. The theoretical part is dedicated to general definition of the risk, characteristic of the mergers and acquisitions and analysis of the particular types of due diligence. The practical part is focused on analysis of the selected risks arising from the available reports due diligence, in which are applied the findings from the theoretical part. In the end of the practical part are evaluated results and summarized the findings found on the basis of the risk analysis.