Semion Yudkovich Mogilevich, born 1946, is a Ukrainian-born Russian organized crime boss whom the FBI has described as one of the world's most dangerous mobsters. He is alleged to direct a vast criminal empire spanning arms trafficking, drug smuggling, prostitution, extortion, money laundering, and financial fraud.

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https://www.theguardian.com/world/2010/dec/01/wikileaks-cables-russian-mafia-gas

Allegations have long swirled that the Russian crime don Semyon Mogilevich had covert interests in Swiss-registered RUE, which distributes gas from central Asia.

A billionaire Ukrainian businessman, Dmitry Firtash, nominally owns nearly half the company.

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Mogilevich orchestrated the YBM Magnex Inc. stock fraud, a Pennsylvania-based company that claimed to manufacture industrial magnets but was a front for money laundering. YBM achieved a market capitalization exceeding $1 billion before the FBI raided its offices in May 1998. Investors lost an estimated $150 million.

Mogilevich was indicted in the United States in 2003 for racketeering, securities fraud, wire fraud, mail fraud, and money laundering conspiracy.

He was added to the FBI's Ten Most Wanted Fugitives list in October 2009 and removed in 2015, though he remains under multiple indictments and international sanctions.

Mogilevich's relevance to Epstein research appears through shared infrastructure and associates operating in overlapping financial ecosystems during the 1990s-2010s period.

Sources

FBI, "Semion Mogilevich" (Wanted Poster); U.S. Department of State, "Semion Mogilevich - Transnational Organized Crime Rewards Program" (April 2022); CBC News, "YBM Magnex used by mob to bilk investors" (June 1999).

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