Felix Henry Sater (born Felix Mikhailovich Sheferovsky; Russian: Феликс Михайлович Шеферовский; March 2, 1966) is a Russia-born American real estate developer and former managing director of Bayrock Group LLC, a real estate conglomerate based out of New York City, New York. Sater has been an advisor to many corporations, including The Trump Organization, Rixos Hotels and Resorts, Sembol Construction, Potok (formerly the Mirax Group), and TxOil.
In 1998, Sater pleaded guilty to his involvement in a $40 million stock fraud scheme orchestrated by the Russian Mafia. In exchange for his guilty plea, he agreed to become an informant for the Federal Bureau of Investigation and federal prosecutors, assisting with organized crime. In July 2017, it was reported that Sater had agreed to cooperate with investigators concerning an international money laundering scheme.