| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2018-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | WESTAR ENERGY INC /KS | 12,186,925 | 8.5% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | WESTAR ENERGY INC /KS | 12,884,729 | 9.1% | EDGAR |
| SC 13G/A | 2018-01-19 | BlackRock Inc. | WESTAR ENERGY INC /KS | 19,013,752 | 13.4% | EDGAR |
| SC 13G/A | 2017-05-09 | BlackRock Inc. | WESTAR ENERGY INC /KS | 15,226,080 | 10.7% | EDGAR |
| SC 13G/A | 2017-02-10 | AMERICAN CENTURY INVESTMENT MANAGEMENT INC | WESTAR ENERGY INC /KS | 0 | 0.0% | EDGAR |
| SC 13G/A | 2017-02-10 | VANGUARD GROUP INC | WESTAR ENERGY INC /KS | 11,805,736 | 8.3% | EDGAR |
| SC 13G/A | 2017-01-27 | BlackRock Inc. | WESTAR ENERGY INC /KS | 12,936,388 | 9.1% | EDGAR |
| SC 13G/A | 2016-02-11 | AMERICAN CENTURY INVESTMENT MANAGEMENT INC | WESTAR ENERGY INC /KS | 8,893,578 | 6.3% | EDGAR |
| SC 13G/A | 2016-02-11 | VANGUARD GROUP INC | WESTAR ENERGY INC /KS | 9,990,243 | 7.1% | EDGAR |
| SC 13G/A | 2016-01-27 | BlackRock Inc. | WESTAR ENERGY INC /KS | 9,860,818 | 7.0% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | WESTAR ENERGY INC /KS | 8,278,465 | 6.3% | EDGAR |
| SC 13G | 2015-02-10 | AMERICAN CENTURY INVESTMENT MANAGEMENT INC | WESTAR ENERGY INC /KS | 7,542,862 | 5.8% | EDGAR |
| SC 13G/A | 2015-01-26 | BlackRock Inc. | WESTAR ENERGY INC /KS | 9,465,370 | 7.2% | EDGAR |
| SC 13G/A | 2014-12-10 | JPMORGAN CHASE & CO | WESTAR ENERGY INC /KS | - | - | EDGAR |
| SC 13G/A | 2014-02-12 | VANGUARD GROUP INC | WESTAR ENERGY INC /KS | 7,494,472 | 5.9% | EDGAR |
| SC 13G | 2014-02-04 | JPMORGAN CHASE & CO | WESTAR ENERGY INC /KS | - | - | EDGAR |
| SC 13G/A | 2014-01-31 | BlackRock Inc. | WESTAR ENERGY INC /KS | 9,020,984 | 7.1% | EDGAR |
| SC 13G | 2013-02-12 | VANGUARD GROUP INC | WESTAR ENERGY INC /KS | 7,017,198 | 5.5% | EDGAR |
| SC 13G/A | 2013-02-11 | BlackRock Inc. | WESTAR ENERGY INC /KS | 6,996,345 | 5.5% | EDGAR |
| SC 13G/A | 2012-02-13 | BlackRock Inc. | WESTAR ENERGY INC /KS | 7,368,801 | 6.3% | EDGAR |