Niklas Ekvall is leaving AP3, Stockholm, to become head of asset management at Swedish investment bank D. Carnegie & Co., Stockholm. Mr. Ekvall was chief investment officer and deputy chief executive of the 15.5 billion euro ($19.1 billion) pension fund. He is replacing Bertil Hult, who left in November, said Carnegie CEO Karin Forseke. Filling the vacancy may be left to the new chief executive officer of AP3, said spokeswoman Pernilla Klein. Current CEO Tomas Nicolin announced earlier this year that he was leaving to become chief executive of Alecta, one of Sweden's largest mutual fund and pension providers. The board is using an executive search firm, which Ms. Klein declined to identify, to find a new chief. Sven Askenberger, current chief operating officer, will be interim CEO when Mr. Nicolin leaves at the end of April.