In October 1994, Aven met Alfa Group's Mikhail Fridman, and soon became an Alfa Bank shareholder serving as a member of the Supervisory Board of the Alfa Group Consortium. From 1994 until June 2011, he served as the President of Alfa-Bank Russia. Currently Aven is a Member of the Board of Directors and Chairman of the Board of Directors of ABH Holdings S.A. Aven is also Chairman of the Board of Directors at AlfaStrakhovanie Group, Co-Chairman of the Board of Directors of CTC Media, Inc. In 2012, the Alfa Group together with Viktor Vekselberg of Renova Group and Leonard Blavatnik of Access Industries sold their aggregate 50% stake in TNK-BP to state-owned Rosneft for $28 billion. In 2013, Aven joined the Board of LetterOne Group, an international investment Business founded by Mikhail Fridman and focused on the telecoms, Technology and Energy sectors. The L1 Group owns companies – and has equity Investments in companies – with operations in 32 countries around the world.