This paper clarifies the status changes of companies that are allowed in the Republic of Croatia and are regulated by the Companies Act. The status changes are important in the modern economic world, as companies are changing their way of doing business and their responsibilities, which is of great importance to their members as well as to their creditors. The law recognizes and prescribes precisely defined status changes, and other changes except those prescribed by the law are not permitted. The status changes permitted by the Companies Act and which are clarified in the paper are: merges and acquisition of companies, division of companies and transformation of companies. In the economic sense, the status changes may have different reasons and motivations. Depending on the type of change, they can serve i order to concentrate in one place capital, human resources and other resources, and to increase the competitiveness of the business itself. The second part of the paper clarifies the transformation of a social enterprise into a joint stock company.