Last month, Swiss authorities announced that UBS would buy Credit Suisse in a shotgun merger to stem further banking turmoil after the smaller lender had come to the brink of collapse.
After a run on deposits, the Swiss government had turned to UBS, which agreed to buy Credit Suisse for 3 billion Swiss francs ($3.3 billion), while the Alpine state put up more than 200 billion francs of support and guarantees.
Now, the bank is looking at how to navigate the mammoth task of integrating Credit Suisse, the success of which Switzerland depends on, without undermining its strengths.
On Tuesday, Reuters also reported that the Bank of England had approved UBS' takeover of Credit Suisse in Britain, a key market for the Swiss lenders racing to close the rescue deal.
UBS also secured a temporary green light from European Union antitrust regulators to complete its acquisition of Credit Suisse, but will still have to request clearance under EU merger rules, the European Commission said.