The Pershing Square Capital Management employee who allegedly—and legally—told his roommate that Bill Ackman was planning to short Herbalife isn't the former analyst you might think.
Shane Dinneen, who left Pershing Square around the end of 2013, is the person besides Ackman most commonly associated with the high-profile short bet on the nutritional supplement company. He even helped Ackman make his first presentation at the Ira Sohn conference on Dec. 20, 2012. But the former analyst is Mariusz Adamski, according to a person familiar with the situation.
Adamski is not named in the SEC order charging his friend and roommate, Filip Szymik, with illegally tipping off another friend, Jordan Peixoto, about Ackman's stock-moving short presentation. Based on Szymik's tip, Peixoto purchased Herbalife put options on Dec. 19, 2012, and made $47,100 in illicit profits, according to the government.
Adamski began working for Pershing in April 2010 as an intern, became a research analyst, and left Pershing in September 2013. He has not been charged with any crime. He did, however, violate Pershing Square's confidentiality policy, according to the SEC. Adamski and his lawyer did not immediately respond to requests for comment. A spokesman for Pershing Square declined to comment.