In this publication, in the form of structural and logical schemes, corporate forms of entrepreneurship are studied, and above all the most common of them are business companies (JSC, LLC). Problems of establishment, reorganization, liquidation of business entities are considered; the property basis of their activities; corporate governance and control; rights and obligations of corporate participants; the legal regime of major transactions; interested party transactions; acquisition of large stakes; liability in corporate legal relations; protection of the rights of participants in corporate legal relations.