In Serbia, like in most of countries in the region, after the hit of the global economic crisis, the awareness of the necessity to change the economic growth model has arisen. In other words, in order to provide a sustainable growth path, there is almost a consensus to re-orientate the economy from the growth based on borrowing, consumption and imports growth to the one based on the growth of investments in the production of tradable goods and services and exports growth. Furthermore, relevant international institutions especially point to, as the key prerequisite and the segment where reforms in the whole region of transition countries should be concentrated in order to support the shift to the sustainable growth track, the increase of the competitiveness of the economy and improvements in business environment. This paper is aimed at looking over from the aggregate level - macroeconomic standpoint onto the micro level in an attempt to clarify the Serbian economy structure - its performances, and try to find if they are related to the precrisis borrowing. To that end, we have analyzed financial data of around 5,000 largest companies operating in Serbia from 2007 to 2009. The main results imply the Serbian economy being highly-concentrated, nevertheless, with the substantial dispersion with regards to company performances, as well as their indebtedness. The main conclusion which may be drawn from the empirical results is the necessity of intensifying the dynamism of business activities in Serbia. In other words, one of the key prerequisites for the so-called structural reforms would be to enhance the institutional business frame, implying the intensification of the mobility of key production factors - capital and labour.