The Zurich-based bank said it had accepted Tidjane Thiam’s resignation, amid a growing controversy over an illicit surveillance operation.
However, the board of Switzerland’s second-biggest bank has given its backing to its embattled chairman Urs Rohner, who had also been under pressure to go.
The crisis began in September when Iqbal Khan, a leading wealth manager who had switched from Credit Suisse to rival UBS, confronted a private detective following him and his wife through Zurich.
The bank initially said it was a rogue case overseen by then chief operating officer Pierre-Olivier Bouee, but the scandal grew as details emerged of further instances of spying.
Swiss financial supervisor FINMA is carrying out its own investigation after the bank subsequently acknowledged it had tailed former human resources head Peter Goerke.
In a statement, Mr Thiam said: “I had no knowledge of the observation of two former colleagues.
“It undoubtedly disturbed Credit Suisse and caused anxiety and hurt. I regret that this happened and it should never have taken place.”
Mr Rohner said: “Based on his deep and comprehensive experience in our business and in view of his impressive performance as head of our Swiss bank and his respect amongst our clients and employees, Thomas Gottstein is excellently positioned to lead Credit Suisse into the future.”
Board member Severin Schwan said: “Urs Rohner has led the board of directors commendably during this turbulent time.”
