People on the Move

Ravi Apte has departed from his role of chief technology officer at the American Stock Exchange. A spokeswoman for the exchange declined to comment on his destination, and Apte could not be reached.

Merrill Lynch has named John Killeen as head of Global Private Client Technology, performing the duties of Byron Vielehr. Vielehr, previously chief technology officer of Merrill Lynch's Private Client Group, has left the firm.

SmartStream Technologies has hired Anthony Kirby as director of market management. Kirby was previously head of STP Design at Deutsche Borse Group.