Nasdaq names Adena Friedman CEO, replacing Greifeld

Greifeld, who has headed the No. 2 U.S. stock market since 2003 and who wrote his graduate thesis on the operation of the exchange, will become chairman of Nasdaq's board, the company said. Current chairman Borje Ekholm will remain on the board. Friedman has said she grew up at Nasdaq, where she worked for 18 years before leaving the company in 2011 to join private equity firm Carlyle Group LP as chief financial officer.