Joint-Stock Financial Corporation Sistema is a diversified conglomerate with business segments across telecommunications and information technology, microelectronics, insurance, ranking, homebuilding, retail, oil, pharmaceutical, and media. Sistema's diverse investment holdings include companies such as MTS, which is a large Russian mobile phone operator, Sitronics, a semiconductor manufacturer, Detsky Mir, a children's retailer, and Bashkirenergo, a power and heat company. The conglomerate generates the vast majority of its revenue in Russia. Read More