12. Ira Rennert
Ira Leon Rennert might not be a celebrity in a true sense of the word, but American investor and businessman deserves a spot on this list nevertheless. The billionaire is the largest individual loser after no less than around $200 million of his have gone down the drain thanks to Madoff. His current net worth is north of $6 billion, so such a hefty loss didn’t hurt Rennert that much. Still, he has surely felt it.