Peter Keller has quit as CEO of of screen-based stock market operator virt-x and member of the management committee of the SWX Swiss Exchange.
In a statement, SWX says Keller will be leaving the group on 31 July 2005 "by mutual agreement".
He will be replaced at virt-x by his currenty deputy Jim Gollan and at SWX by Heinrich Henckel, CEO SWX Swiss Exchange.
Keller has been working for the group for more than eleven years. From 1994 through March 1995, he was involved in the member support centre of the Swiss Electronic Exchange (SEE) project. In 1996, he became the head of the surveillance office of the SEE's successor, the SWX Swiss Exchange. Two years later, he was named head of market, participants and acquisition. In January 2000, he joined the SWX's management committee as the head of the markets division.
Keller was appointed CEO of Virt-x in October 2002 following the resignation of Antoinette Huniker-Ebneter.