SCM owner Akhmetov's assets shrank almost by US$200 million, to $3.5 billion from $3.66 billion, Bloomberg said.
Read alsoTycoon Akhmetov again named the richest UkrainianMicrosoft founder Bill Gates tops the rating with $85.6 billion, he is followed by U.S. businessman Warren Buffett with $78.9 billion and Amazon head Jeff Bezos with $73.5 billion.
Businessmen whose assets exceed $3.61 billion are included in the rating.
It was reported that Akhmetov was the only Ukrainian who was included in the ranking of billionaires, which is compiled by Bloomberg.
Last year Akhmetov lost $4.6 billion, while Ukrainian President Petro Poroshenko's assets expanded by $100 million.