Mr. Cohen’s appearance at SALT — where he also dined privately with a small group of conference speakers, including the prominent short-seller Jim Chanos, the activist investor William A. Ackman and Mr. Biden — was a surprise, given that he was not featured in publicity for the event.
Mr. Cohen last attended in 2011, when he was interviewed onstage by the conference’s founder, Anthony Scaramucci. Two years later, Mr. Cohen’s highly successful SAC Capital Advisors was indicted in the biggest securities fraud case ever brought against a hedge fund.
On Thursday morning, Mr. Cohen was a featured speaker at an event for veterans at the Bellagio. In recent years, he has become a major benefactor to organizations helping wounded veterans.
Later, Mr. Cohen went to see Duran Duran play a private concert for conference attendees.
That Mr. Cohen attended other SALT events has renewed speculation that a small investment firm he established last year — Stamford Harbor Capital — will begin raising money from outside investors next year once a two-year ban he agreed to with the Securities and Exchange Commission expires in January.
Mr. Cohen agreed to the prohibition, which barred him from managing money for outside investors, to settle accusations of an administrative failure to supervise brought by the regulatory agency.
But the man viewed by many as one of the most successful stock traders of his generation was never charged by either prosecutors or regulators with insider trading. And his longtime prosecutorial nemesis, Preet Bharara, who once called SAC Capital a “magnet for market cheaters,” is no longer the United States attorney in Manhattan.
In an interview with The New York Times in October, Mr. Cohen gave the surest indication yet that he was looking to reopen a hedge fund, saying that he was…