Diploma Thesis from the year 2012 in the subject Business economics - Business Management, Corporate Governance, grade: 2, University of Linz (Institut fur Unternehmensgrundung & Unternehmensentwicklung ), language: English, abstract: Entrepreneurial research turned to focus on the business man or women, to analyze these individuals in more detail. Many entrepreneurial research directions developed since that time. One of those concentrates on the group of entrepreneurs, whose main characteristic is to own and lead two and more business simultaneously. As a consequence, this diploma thesis main goal is to study this valuable group of entrepreneurs. The outcomes of this analysis come up with certain attributes describing the group of portfolio entrepreneurs. This is important for certain reasons. The group of portfolio owners distinguishes itself from other groups of entrepreneurs above all in the way of doing business, the motivation to lead this business and many others attributes. This will answer many questions about the phenomenon portfolio entrepreneur, from the theoretical research as well as the empirical viewpoint. This study encompasses a set of interviews with real portfolio entrepreneurs with the sample of ten individuals. It delivers new insights about the personality and abilities, capabilities, skills and traits of portfolio entrepreneurs. Thus delivers a special significance for the development of portfolio entrepreneurship, which is derived from the entrepreneurship research. Furthermore this diploma thesis represents a kind of forerunner in this research area for the Slovak Republic as no comparable research done on this theme could be researched during the conducting of the analysis. The reader will have the chance to find out valuable information about the state of the art literature contributed by other authors in the theoretical part of this thesis. This literature research has been developed from English speaking literature and is notified at the end of the diploma thesis, what makes it affordable for subsequent studies. Subsequently, the results of this study, which has been built on the grounds of extensive literature review, will be presented in the results part. These results have been obtained by a series of in-depth interviews with researched successful portfolio entrepreneurs. In consequence the results come up with new, until now not researched results presented in a very user friendly kind, enriched by citations of portfolio entrepreneurs, expressed during the in-depth interview.