The company counted among its assets oil extraction and processing facilities in the Udmurt Republic and in the Khanty-Mansiysk, Yamalo-Nenets, Irkutsk and Sakhalin regions.
[4][a] The 51% stake was awarded to the bank Mezhdunarodnaya Finansovaya Kompaniya in return for a $130 million loan, guaranteed by Vladimir Potanin's Uneximbank.
[2] Sidanko entered bankruptcy proceedings in February 1999, after ZAO Beta Ekho filed to recover a $22,000 debt.
[13] Tyumen Oil Company bought Sidanko's Chernogorneft unit for $176 million at a bankruptcy auction in November 1999.
[18] In 2003 Sidanko merged with TNK, Onako and the majority of BP's oil assets in Russia to form TNK-BP.