— The article examines the institutional barriers for fast-growing companies in the sectoral and regional markets of Russia. The use of rank-dimensional analysis is substantiated to determine the zone of distortion of the competitive behavior of companies and to identify barriers to entry into a privileged part of the market. The differences in the distributions of companies by their size are assessed and examples of industries in the Russian economy where a group of leaders have formed, up to 10 companies that “close” their part of the market from applicant companies, as well as industries in which such a group of leaders has not yet formed, are identified. It is shown how the growth of fast-growing companies is inhibited as they approach barriers. The hypothesis about the possibility of using rank analysis for diagnosing industries for their monopolization, as well as identifying areas for potential support of fast-growing innovative companies and forecasting/supporting the emergence of regional “champions” is confirmed. Sector-specific assessments and recommendations are provided.