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 “leaning” toward taking outside money from investors in 2018. But he added, “We haven’t made a final decision.”

Representatives for Mr. Cohen, who now oversees a $12 billion private investment firm called Point72 Asset Management, declined to comment on Mr. Cohen’s intentions for Stamford Harbor.

Mr. Cohen is not allowed to raise money while the industry ban is in place. But there’s nothing to stop him from mingling with potential investors — at conferences or in the casinos.

There were no obvious marketing people with Mr. Cohen at SALT, and he did not appear to come with much of an entourage.

But someone associated with Mr. Cohen was handing out invitations to a fund-raiser he will hold on Tuesday in Manhattan for Bo Dietl, the former New York police detective and media personality who is planning to run for mayor. Tickets for the event cost $4,950.