| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| ARST | Sr. VP, Business Development | Oct 21, 2010 | Option Exercise | $43.50 | 1,104 | 48,024 | 0 | Oct 25, 2010, 03:43 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| ARST | Sr. VP, Business Development | Oct 21, 2010 | Option Exercise | 48,024 |