ZURICH, June 12 (Reuters) - UBS's Chief Executive Sergio Ermotti said around 10% of Credit Suisse staff have already left the company before its takeover by his bank.

"It's true that around 10% of the workforce have already left in the last few months before the takeover," Ermotti told Swiss broadcaster SRF in an interview.

UBS earlier on


said it had completed its emergency takeover of stricken local rival Credit Suisse, creating a giant Swiss bank with a balance sheet of $1.6 trillion and greater muscle in wealth management.

The two banks jointly employ 120,000 worldwide, although UBS has already said it will be cutting jobs to reduce costs and take advantage of synergies.

UBS also


a raft of management changes following the takeover. (Reporting by Noele Illien, editing by John Revill)