The article is focused on the activities of two recently established multilateral development banks (MDBs) - the BRICS New Development Bank (NDB) and Asian Infrastructure Investment Bank (AIIB) - in mobilizing private infrastructure investment. Unlike other MDBs, these banks specialize exclusively on sustainable infrastructure projects and are currently creating mechanisms to attract private investment. These factors, as well as Russia’s leading role in both banks, make it necessary to study the mechanisms used by the NDB and AIIB to mobilize private sector funds and make recommendations for their further expansion and development. To achieve this goal, this article presents an analysis of both banks’ documents providing for their engagemen...