Until the entry into force of federal law of June 03, 2009 115-FZ “On Amending the Federal Law” On Joint Stock Companies “and Article 30 of the Federal Law” On Securities Market “,” to complement the Federal Law of 26 December 1995 N 208-FZ “On Joint Stock Companies”, Article 32.1. “Shareholder Agreement” arbitration practice on the admissibility of the conclusion of shareholders’ agreements are based on foreign law was sufficiently scarce, however, below we present an analysis of the three most representative cases in which a Russian arbitration practice center began a new landmark review of corporate disputes in court. The case of “MegFon 203 A75-3725-G/04-860/2005 fall for three years companies registered in the British Isles sue the arbitral tribunal to invalidate the agreement of shareholders of OJSC “MegFon” and this case has certainly precedent, the nature of 1. The plaintiffs asked the court on the basis of Articles 35, 55 of the Constitution and Articles 1, 9, 10, 96 – 98, 153, 166, 168, 209, 420, 422 of the Civil Code, Articles 1, 7, 9, 11, 47 – 49, 52, 53, 55, 58, 65 – 69, 89 – 91 of the Federal Law “On Joint Stock Companies” and the provisions of the Charter of the society to admit on the grounds of nullity, by violation of public policy of the Russian Federation, paragraph 15..