Founded in 1993, Sistema invests in various sectors including telecommunications, high technology, oil and energy, banking, retail, mass-media, tourism, and healthcare services. It is the largest publicly-traded investment company in the region, with over 100 million customers served by its portfolio companies. Sistema reported revenues of US$7.9 billion for Q1 2012 and total assets of US$47.3 billion as of March 31, 2012. Its global depository receipts are listed on the London Stock Exchange, while its ordinary shares are listed on the MICEX-RTS Stock Exchange and the Moscow Stock Exchange. Sistema was ranked 342nd in the Fortune Global 500 list in 2010.