The monograph is devoted to the study of the place and role of transnational corporations (TNCs) in the economies of developing countries and countries with economies in transition using the example of the Federative Republic of Brazil and the Russian Federation. The representative material analyzes the influence of TNCs on the economy of these countries, formulates areas for improving their activities in the markets. The monograph is aimed at senior and middle management personnel of large companies and holdings working in the field of international business, employees of research and consulting organizations, teachers, graduate students and university students, as well as readers interested in the development of the global economy and TNCs in modern conditions and in the future.