The national economy is in dire need of long-term investments. The economic stability of the state in modern conditions depends on the effective operation of banking institutions and the non-banking financial sector, and in this matter such institutions as: non-state pension funds, insurance companies, leasing institutions, etc., could provide significant assistance. In the wartime period, their role is most obvious, since the level of such macroeconomic indicators as: real GDP growth, unemployment rate, inflation rate, balance of payments depends on the development of non-bank financial intermediaries. An important feature for the formation of funds of the non-banking sector is the fact that the funds are formed, firstly, on contractual terms, and secondly, on the terms of the sale of securities. The purpose of the article is to study the activities of institutions of the non-banking financial sector, analyze their impact on the investment of industrial enterprises, and develop proposals for intensifying their participation in investment processes. The theoretical and methodological basis of the research is the work of domestic and foreign scientists in the field of determining the peculiarities of the functioning of enterprises of the non-banking financial sector. The information base consists of scientific, economic and reference literature, works of leading domestic and foreign scientists, methodical materials, information portals, Ukrainian periodicals. A set of methods and approaches were used: system analysis, theoretical generalization, methods of analysis and synthesis. In the article, the author states the importance of researching the theoretical and methodological foundations of the functioning of non-banking financial institutions. An analysis of the legislative framework regulating the activities of enterprises of the non-banking sector has been carried out, characteristic features inherent in each of the individual types of these institutions have been highlighted. The structure and dynamics of investments in the economy of Ukraine over the past ten years have been studied. The dynamics of the number and economic activity of enterprises of the non-banking financial sector have been analyzed. The scientific novelty consists in deepening the essence and researching the dynamics of increasing the investment potential of the non-banking financial sector, which, in contrast to existing research, emphasizes the special relevance of the development of this sector of the economy of Ukraine during the martial law and post-war reconstruction, and also takes into account the international