UnionBanCal Corporation (NYSE:UB) announced today that it would release second quarter 2006 results after the market close on Thursday, July 20, 2006. UnionBanCal management will host a conference call to discuss these results at 8:30 AM Pacific (11:30 AM Eastern) on July 21, 2006. This call is open to all interested parties. From locations within the United States, the call-in number is 800-762-6067 (480-629-9566 from outside the United States). Please call in 10 minutes prior to the beginning of the conference.

A live webcast of the call will be available at http://www.uboc.com. You may access the Investor Relations section of the website via the About Us link from the homepage. The webcast replay will be available on the website beginning at approximately 10:30 AM Pacific (1:30 PM Eastern) on July 21, and will remain on the website for a period of one year.

A recorded playback of the conference call will be available by calling 800-475-6701, (320-365-3844 from outside the United States) from approximately 12:00 PM Pacific (3:00 PM Eastern), July 21, until 11:59 PM Pacific, July 28 (2:59 AM Eastern, July 29). The reservation number for this playback is 835025.

Based in San Francisco, UnionBanCal Corporation 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.