| Date | Open | Close | Volume |
| 2010-03-03 | 5.60 | 6.37 | 1743000 |
| 2010-03-02 | 5.60 | 5.52 | 313900 |
| 2010-03-01 | 5.61 | 5.60 | 1412100 |
| 2010-02-26 | 5.65 | 5.48 | 376900 |
| 2010-02-25 | 5.42 | 5.62 | 129900 |
| 2010-02-24 | 5.55 | 5.63 | 251700 |
| 2010-02-23 | 5.51 | 5.50 | 210800 |
| 2010-02-22 | 5.50 | 5.51 | 239700 |
| 2010-02-19 | 5.30 | 5.47 | 396000 |
| 2010-02-18 | 5.32 | 5.31 | 289100 |
| 2010-02-17 | 5.25 | 5.32 | 641100 |
| 2010-02-16 | 5.02 | 5.20 | 437900 |
| 2010-02-12 | 4.82 | 4.99 | 365300 |
| 2010-02-11 | 4.51 | 4.91 | 673500 |
| 2010-02-10 | 4.27 | 4.55 | 744300 |
| 2010-02-09 | 4.17 | 4.14 | 326300 |
| 2010-02-08 | 4.26 | 4.09 | 384700 |
| 2010-02-05 | 4.45 | 4.28 | 763800 |
| 2010-02-04 | 4.88 | 4.46 | 776700 |
| 2010-02-03 | 5.28 | 5.27 | 273200 |
| 2010-02-02 | 5.14 | 5.31 | 286100 |
| 2010-02-01 | 5.20 | 5.15 | 187700 |
| 2010-01-29 | 5.09 | 5.16 | 425900 |
| 2010-01-28 | 5.06 | 5.04 | 461900 |
| 2010-01-27 | 4.83 | 4.98 | 509400 |
| 2010-01-26 | 4.76 | 4.86 | 406400 |
| 2010-01-25 | 4.98 | 4.81 | 213400 |
| 2010-01-22 | 4.75 | 4.91 | 380700 |
| 2010-01-21 | 4.92 | 4.76 | 250900 |
| 2010-01-20 | 4.85 | 4.89 | 131400 |
| 2010-01-19 | 4.66 | 4.89 | 263800 |
| 2010-01-15 | 4.84 | 4.66 | 390200 |
Other Companies: 06-08-2007 | ev3, Inc. | 03-11-2009-1
Northwest Natural Gas Company | 01-09-2009 | Old Point Financial Corporation