Vladimir Artamonov, 46, formerly of Manhattan, was arrested on Thursday in Elkridge, Maryland, where he now lives, and charged with securities fraud, wire fraud and investment adviser fraud. New York Attorney General Letitia James has also investigated Artamonov, and in February 2024 won a court order blocking his alleged fraud from continuing. Prices of stocks that Berkshire buys regularly rise after the investments are disclosed. According to court papers, Artamonov was also a managing partner of the hedge fund Coastal Investment Management through at least February 2023. The case is U.S. v. Artamonov, U.S. District Court, Southern District of New York, No.