Great Plains Energy (NYSE: GXP) announced today that it will release its 2012 first quarter earnings on Thursday, May 3, 2012, after the market close. On Friday, May 4, 2012, at 9:00 a.m. EDT, executive officers of the Company will conduct a webcast and conference call to discuss the Company’s 2012 first quarter earnings and operating results. Supplemental financial information and the earnings webcast presentation will be available after the May 3 market close and after 8:30 a.m. EDT on May 4, respectively, on the Great Plains Energy website at www.greatplainsenergy.com. Stockholders, analysts and other interested parties may access the earnings call by dialing (877) 791-9323 (U.S./Canada) or (706) 758-1332 (international) using pass code 70809063. A replay of the webcast will be available on Great Plains Energy’s website and telephonically through May 11, 2012, at (855) 859-2056 (U.S./Canada) or (404) 537-3406 (international), pass code 70809063. ABOUT GREAT PLAINS ENERGY Headquartered in Kansas City, Mo., Great Plains Energy Incorporated (NYSE: GXP) is the holding company of Kansas City Power & Light Company and KCP&L Greater Missouri Operations Company, two of the leading regulated providers of electricity in the Midwest. Kansas City Power & Light Company and KCP&L Greater Missouri Operations Company use KCP&L as a brand name. More information about the companies is available on the Internet at: www.greatplainsenergy.com or www.kcpl.com.