Exhibit (b4-6) FIFTEENTH AMENDMENT TO THE CAPITOL BANCORP LTD. EMPLOYEE SAVINGS AND STOCK OWNERSHIP PLAN The Capitol Bancorp Ltd. Employee Savings and Stock Ownership Plan is hereby amended effective January 10, 2001 by adding the following participating employer at the end of the list contained: Name of Type of State of Date of Employer Entity Organization Participation -------- ------ ------------ ------------- Sunrise Capital Holding Company New Mexico 1/10/2001 Corporation CAPITOL BANCORP LIMITED Dated: May 23, 2001 By: /s/ Joseph D. Reid -------------------- ------------------------------------ Joseph D. Reid Chairman and CEO SUNRISE CAPITAL CORPORATION Dated: May 23, 2001 By: /s/ William Hinz -------------------- ------------------------------------ William Hinz, Executive Vice President