| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2015-01-26 | BlackRock Inc. | GREAT PLAINS ENERGY INC | 11,380,415 | 7.4% | EDGAR |
| SC 13G | 2014-02-14 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | GREAT PLAINS ENERGY INC | 7,842,043 | 5.1% | EDGAR |
| SC 13G/A | 2014-02-11 | VANGUARD GROUP INC | GREAT PLAINS ENERGY INC | 8,838,542 | 5.7% | EDGAR |
| SC 13G/A | 2014-01-29 | BlackRock Inc. | GREAT PLAINS ENERGY INC | 9,241,530 | 6.0% | EDGAR |
| SC 13G | 2013-02-13 | VANGUARD GROUP INC | GREAT PLAINS ENERGY INC | 8,468,525 | 5.5% | EDGAR |
| SC 13G | 2013-01-30 | BlackRock Inc. | GREAT PLAINS ENERGY INC | 7,806,762 | 5.1% | EDGAR |
| SC 13G/A | 2012-09-10 | BlackRock Inc. | GREAT PLAINS ENERGY INC | 7,148,249 | 4.7% | EDGAR |
| SC 13G | 2012-02-09 | BlackRock Inc. | GREAT PLAINS ENERGY INC | 6,833,276 | 5.0% | EDGAR |
| SC 13G/A | 2011-08-09 | Bank of New York Mellon CORP | GREAT PLAINS ENERGY INC | 6,106,712 | 4.5% | EDGAR |
| SC 13G/A | 2011-02-14 | PUTNAM LLC | GREAT PLAINS ENERGY INC | 5,078,871 | 3.7% | EDGAR |
| SC 13G | 2011-02-03 | Bank of New York Mellon CORP | GREAT PLAINS ENERGY INC | 8,542,172 | 6.3% | EDGAR |
| SC 13G | 2010-02-12 | PUTNAM LLC | GREAT PLAINS ENERGY INC | 8,204,160 | 6.0% | EDGAR |
| SC 13D/A | 2009-09-18 | GAMCO INVESTORS, INC. ET AL | GREAT PLAINS ENERGY INC | 2,759,784 | 2.0% | EDGAR |
| SC 13D | 2009-05-04 | GAMCO INVESTORS, INC. ET AL | GREAT PLAINS ENERGY INC | 3,091,058 | 2.6% | EDGAR |
| SC 13G | 2009-02-05 | BARCLAYS GLOBAL INVESTORS NA /CA/ | GREAT PLAINS ENERGY INC | 3,681,192 | 3.1% | EDGAR |
| SC 13G/A | 2007-02-15 | MORGAN STANLEY | GREAT PLAINS ENERGY INC | 3,826,672 | 4.8% | EDGAR |
| SC 13G | 2006-02-16 | MORGAN STANLEY | GREAT PLAINS ENERGY INC | 3,786,141 | 5.1% | EDGAR |
| SC 13G | 2002-02-14 | UMB FINANCIAL CORP | GREAT PLAINS ENERGY INC | 3,163,481 | 5.6% | EDGAR |