The authors of the article set a key task to familiarize readers with the theoretical aspects in the field of non-credit financial organizations (hereinafter - NFO): their concept, classification, types and role that they occupy in the domestic financial market of our country, including, given that the Federal Law of 10.02.2002 No. 86-FZ “On the Central Bank of the Russian Federation (Bank of Russia)” from 2013 was introduced Article 76.1, which establishes a separate list of types of activities that are carried out by NFO. In addition, this article also discusses theoretical and practical aspects in the field of control and supervision by the mega-regulator over the operations and activities of the NFO, including taking into account that this list does not agree with the lists of other laws, and may create a legal conflict. As a result of the conducted research, the study of domestic experience in this field of study, the authors conclude that at present the megaregulator has taken and continues to take the necessary measures aimed at improving legislative aspects. The Bank of Russia is implementing a system of control over supervised entities at the proper level, which is becoming more complex and in which not only public administration structures are involved.