Described by prosecuitors this week as a "man of nearly infinite means," a 2011 SEC filing has provided a window into the registered sex offender's elite Wall Street links, according to the Financial Times. 

Epstein, who caught a lucky break tutoring the son of Bear Stearns chairman Alan Greenberg before joining the firm, left the investment bank in 1981 to set up his own financial firm. While he reportedly managed money for billionaires for decades, most of Epstein's dealings have been done in the shadows. 

A 2011 SEC filing reveals that Epstein's privately held firm, the Financial Trust Company, took a 6.1% stake in Pennsylvania-based catalytic converter maker Environmental Solutions Worldwide (ESW) backed by Leon Black, the billionaire founder of Apollo Global Management.