Its net profit was up by 53 percent compared with the second quarter of 2014, the bank said in a 37-page press release ahead of a quarterly report that will be published Tuesday.
USB chief executive Sergio Ermotti said he was happy with the second-quarter result and vowed to continue investing for profitable growth.
"I am pleased with the quarter. We maintained our momentum despite ongoing market challenges," he said.
In its outlook for the third quarter, UBS warned that seasonal impacts may affect profit and revenue. The report warns of ongoing underlying macroeconomic challenges and pledged to resolve them in the near future.