Alexandra Gamlemshaug Andresen, who rides for a dressage stable in Germany, topped this year's list of those with the highest taxable wealth in the city, coming in just a fraction ahead of her sister Katharina (20), who topped the city tax list last year with a fortune of 4.6 billion kroner ($700 million).
Their father, tobacco heir Johan H. Andresen, in 2007 transferred over 80 percent of his shares in his investment company Ferd Holding over to his daughters, but Katharina did not appear on the tax rolls until she turned 18 in 2013.
The Andresen sisters ranked second and third in the country to Oil Services billionaire Kjell Inge Røkke, who had highest taxable wealth in the country for the second year running, according to a list of the highest taxpayers of 2014 released by the Norwegian government on Thursday evening.
Both Katharina Andresen and Kjell Inge Røkke recorded zero income in the period, as did Støle Svein, the country's sixth richest man, raising the eyebrows of many commentators.
Alexandra Andresen earned just 21,579 kroner over the period.
This meant that oil services billionaire Trond Mohn was once again the country's highest taxpayer — paying 138 million kroner, despite being only the fifth wealthiest.
He was followed closely by his son Frederik Wilhelm Mohn, who paid 120 million kroner.