| Date | Open | Close | Volume |
| 2010-03-03 | 21.44 | 21.71 | 4018700 |
| 2010-03-02 | 21.50 | 21.29 | 2966600 |
| 2010-03-01 | 20.53 | 21.50 | 6359500 |
| 2010-02-26 | 19.80 | 19.97 | 3213200 |
| 2010-02-25 | 19.65 | 19.87 | 1922000 |
| 2010-02-24 | 20.00 | 19.96 | 3811600 |
| 2010-02-23 | 19.83 | 19.89 | 3590700 |
| 2010-02-22 | 19.71 | 19.84 | 4643400 |
| 2010-02-19 | 19.63 | 19.68 | 2853800 |
| 2010-02-18 | 19.45 | 19.63 | 3065000 |
| 2010-02-17 | 19.10 | 19.40 | 3219500 |
| 2010-02-16 | 18.57 | 19.06 | 2504600 |
| 2010-02-12 | 18.36 | 18.38 | 2445900 |
| 2010-02-11 | 17.96 | 18.23 | 3250500 |
| 2010-02-10 | 18.04 | 17.99 | 2397100 |
| 2010-02-09 | 17.90 | 18.07 | 2665500 |
| 2010-02-08 | 17.71 | 17.75 | 3124900 |
| 2010-02-05 | 17.91 | 17.75 | 4545400 |
| 2010-02-04 | 18.61 | 17.92 | 2824200 |
| 2010-02-03 | 18.80 | 18.76 | 1993900 |
| 2010-02-02 | 19.07 | 18.89 | 3158500 |
| 2010-02-01 | 18.46 | 19.01 | 2677100 |
| 2010-01-29 | 18.57 | 18.26 | 2731400 |
| 2010-01-28 | 18.63 | 18.44 | 2698200 |
| 2010-01-27 | 18.56 | 18.66 | 2086600 |
| 2010-01-26 | 18.82 | 18.70 | 2881800 |
| 2010-01-25 | 18.94 | 19.01 | 2509700 |
| 2010-01-22 | 19.07 | 18.81 | 2981600 |
| 2010-01-21 | 20.27 | 19.11 | 4424400 |
| 2010-01-20 | 20.04 | 19.88 | 2270900 |
| 2010-01-19 | 19.97 | 20.16 | 2085100 |
| 2010-01-15 | 20.32 | 19.91 | 3619500 |
Other Companies: 11-03-2008 | Cytec Industries Inc. | 11-09-2009-1
Great Plains Energy Inc. | 01-28-2008-1 | REEDS, Inc.