X0303 4 2010-12-17 0 0000109380 ZIONS BANCORPORATION /UT/ ZION 0001313496 Maio Keith D ONE SOUTH MAIN STREET, 15TH FLOOR SALT LAKE CITY UT 84133-1109 0 1 0 0 EVP & Pres. of Subsidiary Common Stock 2010-12-17 4 A 0 137. 0 A 30034. D Common Stock 6811.232 I By 401(k) Plan These shares are issuable in respect of restricted stock units that represent a portion of the reporting person's salary, net of withholdings and deductions, and that were issued under the Zions Bancorporation 2005 Stock Option and Incentive Plan. For more information, please see the Current Report 8-K filed by Zions Bancorporation on December 28, 2009. Restricted stock units are 100% vested on the date of grant but are subject to transfer restrictions that lapse in two annual installments beginning on January 15, 2011 and that lapse in full on the reporting person's earlier death. By Thomas E. Laursen as attorney in fact 2010-12-21