X0304 4 2011-08-31 0001143068 GREAT PLAINS ENERGY INC GXP 0001182575 DOWNEY WILLIAM H C/O GREAT PLAINS ENERGY INCORPORATED 1200 MAIN STREET KANSAS CITY MO 64105 1 Former Dir&Exec Vice Chairman Common Stock 2011-08-31 4 D 0 20215 0 D 133884 D Common Stock 3553 I 401(k) Forfeiture of 2011 restricted stock grant upon retirement, including 199 shares acquired between May 20, 2011, and August 31, 2011, through participation in the Company's Dividend Reinvestment and Direct Stock Purchase Plan. Amount includes 227 shares acquired between May 20, 2011, and August 31, 2011, through participation in the Company's Dividend Reinvestment and Direct Stock Purchase Plan. Amount includes 87 shares acquired between May 20, 2011, and August 31, 2011, from automatic payroll deduction/investment and participation in the Company's 401(k) Plan. Executed on behalf of William H. Downey by Jaileah X. Huddleston, attorney-in-fact 2011-09-01