Securities and Exchange Commission member Elad Roisman plans to leave the market regulator by the end of January, giving Democrats a bigger majority at an agency pursuing an ambitious and sometimes politically divisive policy agenda.
Mr. Roisman joined the five-member SEC as a Republican commissioner in September 2018, having served as chief counsel for Republicans on the Senate Banking Committee before that. He briefly served as the SEC’s acting chairman at the end of the Trump administration.