| Date | Open | Close | Volume |
| 2010-03-02 | 17.92 | 18.11 | 140400 |
| 2010-03-01 | 18.71 | 17.99 | 212900 |
| 2010-02-26 | 18.97 | 18.89 | 129800 |
| 2010-02-25 | 19.21 | 18.80 | 309900 |
| 2010-02-24 | 19.22 | 18.73 | 198500 |
| 2010-02-23 | 18.39 | 19.24 | 268000 |
| 2010-02-22 | 18.20 | 18.44 | 121200 |
| 2010-02-19 | 18.67 | 18.43 | 198200 |
| 2010-02-18 | 18.78 | 18.45 | 247300 |
| 2010-02-17 | 18.27 | 18.56 | 202900 |
| 2010-02-16 | 18.89 | 18.60 | 224200 |
| 2010-02-12 | 20.20 | 19.39 | 401700 |
| 2010-02-11 | 20.57 | 19.83 | 233200 |
| 2010-02-10 | 20.81 | 20.71 | 165200 |
| 2010-02-09 | 20.68 | 20.84 | 237000 |
| 2010-02-08 | 21.15 | 21.38 | 394800 |
| 2010-02-05 | 22.29 | 21.23 | 325800 |
| 2010-02-04 | 21.00 | 22.19 | 465000 |
| 2010-02-03 | 20.51 | 20.57 | 216400 |
| 2010-02-02 | 21.00 | 20.52 | 407800 |
| 2010-02-01 | 22.12 | 21.11 | 324300 |
| 2010-01-29 | 20.56 | 22.16 | 595900 |
| 2010-01-28 | 19.87 | 20.78 | 734500 |
| 2010-01-27 | 20.62 | 19.89 | 328400 |
| 2010-01-26 | 20.41 | 20.38 | 344300 |
| 2010-01-25 | 20.35 | 20.02 | 306900 |
| 2010-01-22 | 19.10 | 20.62 | 728500 |
| 2010-01-21 | 18.71 | 18.88 | 413200 |
| 2010-01-20 | 18.67 | 18.60 | 227000 |
| 2010-01-19 | 19.42 | 18.57 | 357000 |
| 2010-01-15 | 18.10 | 19.11 | 375000 |
| 2010-01-14 | 18.54 | 17.99 | 331900 |
Other Companies: 11-21-2008 | SuperGen Inc. | 05-23-2009
Varian Semiconductor Equipment Associates Inc. | 02-16-2008-1 | Humana Inc.