Union Bank of California, N.A., announced today (June 29) that it has increased its reference rate to 8.25 percent from 8.00 percent. Based in San Francisco, UnionBanCal Corporation (NYSE:UB) is a bank holding company with assets of $48.8 billion at March 31, 2006. Its primary subsidiary, Union Bank of California, N.A., had 321 banking offices in California, Oregon and Washington, and 18 international facilities, at March 31, 2006. The company's Web site is located at www.uboc.com.