When it comes to M&A advice, the Russian market is quite diverse. Mergermarket's league table of Russian M&A advisors shows market share spread between several top banks, many of them international firms.
It's a different matter, however, when it comes to evaluating banks by assets. Here, as the chart below from Bloomberg shows, two banks stand out in the Commonwealth of Independent States. They are, predictably, Sberbank and VTB.