Move over, Leonard Blavatnik: There’s a new leader in town.

A Russian oligarch has for the first time topped the list of richest Londoners, according to Forbes Russia.

Mikhail Fridman’s net worth of $15 billion knocked billionaire investor Len Blavatnik from the top of the list, Forbes reported Tuesday. Fridman is one of 55 billionaire Londoners, who have a combined net worth of $226 billion.

Blavatnik, worth $18 billion, has in the meantime changed his residence to New York City.

Forbes Russia named Fridman its businessman of the year in 2017. That year, Buzzfeed published the infamous “Trump Dossier,” accusing the oligarch of interfering in the 2016 U.S. presidential elections on President Vladimir Putin’s orders.

Fridman and two fellow investors filed defamation suits against the news website and the investigation firm that compiled it. The lawsuit was dismissed in a U.S. court last year.

Fridman co-founded the Luxembourg-based LetterOne investment fund and Alfa Bank, one of Russia’s biggest commercial banks.