The current half-year old systemic crisis in Ukraine has had a deep negative effect on almost all aspects of Russian-Ukrainian relations. Investment ties, which developed greatly during the previous decade, were no exception. In this article we try to assess the scale and identify the key trends of corporate integration between the two states before the crisis, find out the impact of the crisis on FDI dynamics, estimate the probability of nationalization of enterprises with Russian capital, and consider possible strategies of Russian companies, taking into account existing and hypothetical economic and political risks in Ukraine.