The IFLR1000, international legal directory, annually mentions O2 Consulting amongst the best Russian law firms with the vast expertise in M&A.
https://www.iflr1000.com/Firm/O2-Consulting-Russia/Profile/2773#rankings
The IFLR1000 is the guide to the world’s leading financial and corporate law firms and lawyers. It evaluates performance of more than 1000 law firms from over 120 jurisdictions worldwide.
Leaders in categories of financial law are determined according to the statistics, competitors’ and partners’ views and feedback from clients.