SYDNEY (MarketWatch) -- Citigroup Inc. C, +1.62% banker Stephen Trauber could receive up to $30 million over three years, The Wall Street Journal reported Monday. The report, which cited people familiar with the matter, said that the energy banker who recently joined the firm from UBS stands to be among Citigroup's highest paid employees. The U.S. Treasury still holds 17.5% of Citigroup.