The sale was made to pay Yukos' US$ 27.5 billion tax bill, Yuganskneftegaz was originally sold for US$ 9.4 billion to a little known company Baikalfinansgroup which was later bought by the Russian state-owned oil company Rosneft .
Rosneft used to be a public business. 
( z1 business :ARG1-of ( z2 public ) :domain ( z3 company :name ( z4 name :op "Rosneft" ) ) :time ( z5 use ) )