| Date | Open | Close | Volume |
| 2010-03-02 | 0.85 | 0.84 | 762200 |
| 2010-03-01 | 0.85 | 0.86 | 306900 |
| 2010-02-26 | 0.87 | 0.86 | 1427100 |
| 2010-02-25 | 0.86 | 0.88 | 307200 |
| 2010-02-24 | 0.88 | 0.89 | 309400 |
| 2010-02-23 | 0.90 | 0.88 | 270100 |
| 2010-02-22 | 0.97 | 0.89 | 672400 |
| 2010-02-19 | 0.89 | 0.93 | 360300 |
| 2010-02-18 | 0.93 | 0.89 | 329900 |
| 2010-02-17 | 0.94 | 0.93 | 400400 |
| 2010-02-16 | 0.95 | 0.93 | 465300 |
| 2010-02-12 | 0.87 | 0.90 | 213700 |
| 2010-02-11 | 0.89 | 0.87 | 234900 |
| 2010-02-10 | 0.86 | 0.87 | 193800 |
| 2010-02-09 | 0.91 | 0.86 | 334800 |
| 2010-02-08 | 0.90 | 0.88 | 481600 |
| 2010-02-05 | 0.93 | 0.88 | 435300 |
| 2010-02-04 | 1.00 | 0.89 | 838500 |
| 2010-02-03 | 0.95 | 0.97 | 839400 |
| 2010-02-02 | 0.96 | 0.96 | 275200 |
| 2010-02-01 | 0.98 | 0.95 | 340000 |
| 2010-01-29 | 0.96 | 0.94 | 671200 |
| 2010-01-28 | 0.99 | 0.96 | 466500 |
| 2010-01-27 | 0.99 | 0.96 | 420100 |
| 2010-01-26 | 1.00 | 0.96 | 745800 |
| 2010-01-25 | 1.02 | 1.01 | 471200 |
| 2010-01-22 | 1.06 | 0.99 | 1007700 |
| 2010-01-21 | 1.12 | 1.03 | 726200 |
| 2010-01-20 | 1.12 | 1.10 | 697200 |
| 2010-01-19 | 1.11 | 1.12 | 759800 |
| 2010-01-15 | 1.27 | 1.15 | 2330400 |
| 2010-01-14 | 1.21 | 1.26 | 10120000 |
Other Companies: 03-27-2009 | Universal Power Group Inc. | 10-29-2009-1
Thomas Properties Group Inc. | 04-08-2007 | PerkinElmer Inc.