One of the top executives at Nasdaq OMX, Eric Noll, is leaving to join an investment firm, according to people briefed on the move.
Mr. Noll, who oversaw Nasdaq’s trading operations in the United States, was seen as one of the leading candidates to succeed Robert Greifeld as chief executive.
The departure of Mr. Noll comes after the Nasdaq exchange suffered a string of technical malfunctions that have hurt its reputation in the technology world. In August, a glitch shut down all trading in Nasdaq-listed stocks for three hours. A few weeks later, Twitter chose to list its shares on the New York Stock Exchange instead of Nasdaq.
Mr. Noll’s departure was first reported by Fox Business Network.
Nasdaq declined to comment on the change. Mr. Noll could not be reached for comment.
