Société Générale — Major Shareholding Notification 2009

May 27, 2009

Press Release

Paris, 27 May 2009

Société Générale acquires additional 7% stake in Rosbank

Société Générale Group has just acquired an additional stake of 7% in Rosbank shares from its Russian partner Interros.

Further to this acquisition, Société Générale owns 64,7% of the shares of Rosbank. Société Générale reiterates with this transaction its confidence in the development perspectives of Rosbank and in the future of the Russian banking market.

Société Générale

Société Générale is one of the largest financial services groups in the euro-zone. The Group employs 163,000 people worldwide in three key businesses:

• Retail Banking & Financial Services: Société Générale serves more than 30 million individual customers worldwide. Global Investment Management & Services: Société Générale is one of the largest banks in the euro-zone in terms
• of assets under custody (EUR 2 762 billion, March 2009) and under management (EUR 332 billion, March 2009). Corporate & Investment Banking: Société Générale ranks among the leading banks worldwide in euro capital markets, derivatives and structured finance.

Société Générale is included in 3 socially-responsible investment indexes: FTSE4Good, ASPI and Ethibel. www.socgen.com

PRESS RELATIONS SOCIETE GENERALE Stéphanie CARSON-PARKER +33 (0)1 42 14 95 77 Hélène MAZIER +33 (0)1 58 98 72 74

Laura SCHALK +33 (0)1 42 14 52 86 P.A +33(0)1 42 14 49 48 Fax +33(0)1 42 14 28 98 SOCIETE GENERALE COMM/PRS 75886 PARIS CEDEX 18 www.socgen.com A French corporation with share capital of EUR 725,909,055 552 120 222 RCS PARIS