William J. Kelly was promoted to CEO of Robeco USA, effective Feb. 8, said Beth McGoldrick, spokeswoman. Stefan Bichsel, who has been president and CEO, will become chairman, a new position. The firm does not currently plan to fill the role of president, Ms. McGoldrick said. Mr. Kelly had been CFO of Robeco USA. Ms. McGoldrick said the firm is "very close" to naming his replacement, but she could not provide additional information. Robeco USA has $31 billion in assets under management.