X0203 3 2010-03-16 0 0001109546 PACIFIC MERCANTILE BANCORP PMBC 0001021089 ARGYROS GEORGE L ARNEL & AFFILIATES 949 SOUTH COAST DR SIXTH FLOOR COSTA MESA CA 92626 1 0 0 0 Common Stock 10000 I (1) Series A Convertible 10% Cumulative Preferred Stock 50000 I (1) Series A Convertible 10% Cumulative Preferred Stock 7.65 2009-12-03 2011-11-27 Common Stock 653500 I (1) (2) (1) All shares shown in this Form 3 are owned in the name of the Argyros Family Trust, of which the Reporting Person is a trustor and a trustee. (2) The shares of Series A Convertible Preferred Stock (the "Series A Shares") are convertible into shares of common stock, at any time in whole or from time to time in part, at the option of the Reporting Person. However, if and to the extent not sooner converted by the Reporting Person, the Series A Shares will automatically convert into shares of common stock on November 27, 2011. Barbara I. Palermo, Attorney In Fact 2010-04-15