UBS had originally planned to keep the top 20% of dealmakers — with a particular focus on retaining technology, media and telecoms-related positions, but many of the top-performing bankers have left the bank or been hired by competitors, sources told Bloomberg.

UBS had also hoped to keep most of Credit Suisse’s private bankers, but many of them have also left, two sources told the wire service.

Switzerland-based corporate bankers and relationship managers overseeing large client accounts are seen as less likely to be affected by cuts, a source told Reuters.

Likewise, UBS will want to keep bankers responsible for managing Credit Suisse’s structured loans to wealthy clients and its equity derivatives operations, a source told Bloomberg.

JPMorgan analysts estimate UBS may see a $150 billion slump in its wealth-management client assets after absorbing Credit Suisse, Bloomberg reported last week.