X0101 42003-07-011 0000930429 MONTEREY BAY BANCORP INC MBBC 0001186127 CARSON MARY ANNE 0100Corporate Secretary Common Stock2003-07-014J0555.6826.3245D0IBy ESOPCommon Stock2003-07-014J0719.56826.3245D0IBy 401(k) Stock Option12.622003-07-014J0250026.3245D1988-08-082011-06-28Common Stock25000DStock Option15.882003-07-014J050026.3245D1988-08-082011-11-29Common Stock5000DStock Option20.132003-07-014J0300026.3245D1988-08-082012-12-19Common Stock30000DCash out of shares held in 401(k) Plan pursuant to the Agreement and Plan of Merger ("the Merger Agreement") by and among Union Bank of California, N.A., UnionBanCal Corporation, Monterey Bay Bank and Monterey Bay Bancorp, Inc. dated April 7, 2003.Cash out of shares held in Employee Stock Ownership Plan pursuant to the Merger Agreement. These options, which provided for vesting in 5 installments beginning on June 28, 2002, November 29, 2002 and December 19, 2003, were cancelled in the merger in exchange for a cash payment representing the difference between approximately $26.3245 and the exercise price of each such cancelled option. Mary Anne Carson2003-07-02