Carl Icahn
Carl Icahn is the founder and majority shareholder of Icahn Enterprises.
  • Hindenburg Research has stepped up its market offensive against Carl Icahn's firm, days after it accused the billionaire of running "Ponzi-like" structures. 
  • The short seller disclosed on Thursday that it has opened a short position in Icahn Enterprises bonds. 
  • The move comes as Icahn's firm posted a surprise first-quarter loss, and disclosed that it had been contacted by US prosecutors.

Hindenburg Research stepped up its market offensive against Carl Icahn's business empire, just days after it published a bombshell report accusing the billionaire of running "Ponzi-like" structures.