Long considered "too big to fail", financial conglomerates pose a large number of risks to the entire international financial system, due to the concentration of financial and insurance activities that characterizes them. Indeed, resulting from the overlapping of credit institutions, investment firms and insurance companies, financial conglomerates are at the heart of the problem of the assessment of the effectiveness of the regulation exercised by the public authorities on the financial sector. The concentration of risks within these powerful cross-sectoral financial groups requires a state framework that is perfectly suited to the very nature and specificities of these entities. However, the globalization of the economy as well as the interconnection of international financial markets have led to the geographical extension of companies acting on the credit, securities and insurance markets. Given the scope of this phenomenon, the supervision of financial conglomerates must be aimed primarily at maintaining international financial security.