| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| VIST | DAVIS ROBERT D | President & CEO | Dec 07 '09 | Buy | 5.30 | 4,000 | 21,200 | 8,852 | Dec 07 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Feb 18 '09 | Buy | 8.35 | 200 | 1,670 | 4,852 | Feb 18 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Nov 24 '08 | Buy | 9.25 | 1,000 | 9,250 | 1,096 | Nov 24 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Nov 12 '08 | Buy | 9.74 | 577 | 5,620 | 4,652 | Nov 12 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Oct 28 '08 | Buy | 10.75 | 500 | 5,375 | 4,075 | Oct 29 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Aug 18 '08 | Buy | 14.00 | 100 | 1,400 | 3,575 | Oct 02 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Aug 13 '08 | Buy | 13.99 | 1,000 | 13,991 | 3,475 | Oct 02 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Aug 06 '07 | Buy | 18.65 | 851 | 15,869 | 2,475 | Oct 02 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Aug 03 '07 | Buy | 18.75 | 300 | 5,625 | 1,624 | Oct 02 12:00 AM |
| VIST | DAVIS ROBERT D | President & CEO | Feb 14 '06 | Buy | 24.00 | 1,000 | 24,000 | 1,200 | Oct 02 12:00 AM |