Karl Motey, a former tech stock analyst who testified for the government in two insider-trading trials and secretly recorded more than 400 conversations for the FBI in New York, was sentenced to time served for his cooperation.

Motey, 48, “played a pivotal role” in the government’s investigation of the expert networking firm Primary Global Research, posing as a hedge-fund manager who sought illegal tips from company insiders, prosecutors in the office of US Attorney Preet Bharara in Manhattan said in a January letter to District Judge Jed Rakoff, who presided over the case.