Jacob Gottlieb was considering raising money for a hedge fund. One problem: His last one had collapsed in a scandal.

While Mr. Gottlieb wasn’t accused of wrongdoing, googling his name prominently surfaced news articles chronicling the demise of Visium Asset Management LP, which once managed $8 billion. The results also included articles about his top portfolio manager, who died by suicide days after he was indicted for insider trading in 2016, and Mr. Gottlieb’s former brother-in-law, an employee of Visium who was convicted...