| Date | Open | Close | Volume |
| 2010-03-03 | 13.75 | 13.93 | 110200 |
| 2010-03-02 | 13.43 | 13.60 | 95600 |
| 2010-03-01 | 13.38 | 13.39 | 49300 |
| 2010-02-26 | 12.85 | 13.31 | 102000 |
| 2010-02-25 | 13.21 | 12.89 | 73500 |
| 2010-02-24 | 13.39 | 13.28 | 25600 |
| 2010-02-23 | 13.31 | 13.30 | 53000 |
| 2010-02-22 | 13.46 | 13.36 | 43000 |
| 2010-02-19 | 13.30 | 13.45 | 29200 |
| 2010-02-18 | 13.40 | 13.38 | 101600 |
| 2010-02-17 | 13.25 | 13.48 | 60200 |
| 2010-02-16 | 12.96 | 13.23 | 56500 |
| 2010-02-12 | 12.75 | 12.98 | 57700 |
| 2010-02-11 | 12.64 | 12.87 | 30800 |
| 2010-02-10 | 12.50 | 12.53 | 24100 |
| 2010-02-09 | 12.25 | 12.41 | 55400 |
| 2010-02-08 | 12.73 | 12.20 | 66500 |
| 2010-02-05 | 12.51 | 12.82 | 123600 |
| 2010-02-04 | 13.83 | 12.66 | 223000 |
| 2010-02-03 | 13.81 | 13.90 | 44000 |
| 2010-02-02 | 14.00 | 13.89 | 64400 |
| 2010-02-01 | 13.67 | 13.96 | 74200 |
| 2010-01-29 | 13.72 | 13.75 | 78300 |
| 2010-01-28 | 14.49 | 13.81 | 136200 |
| 2010-01-27 | 14.25 | 14.21 | 86400 |
| 2010-01-26 | 14.45 | 14.25 | 59600 |
| 2010-01-25 | 14.43 | 14.51 | 70200 |
| 2010-01-22 | 14.88 | 14.43 | 151600 |
| 2010-01-21 | 16.12 | 14.99 | 227300 |
| 2010-01-20 | 16.40 | 16.23 | 51500 |
| 2010-01-19 | 16.34 | 16.39 | 78700 |
| 2010-01-15 | 16.73 | 16.13 | 69100 |
Other Companies: 02-25-2009 | VanceInfo Technologies Inc. | 12-04-2007-1
Techne Corp. | 03-10-2007 | Diedrich Coffee Inc.