| Transaction Date | Filer | Title | Filing | Transaction Type | Shares Traded | Price | Total Held* |
|---|---|---|---|---|---|---|---|
| 08/31/17 |
Chief Operating Officer
|
Chief Operating Officer | Form 4 | Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3 | 6,745 | $6.42 | 102,703 |
| 06/02/08 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Open market or private sale of non-derivative or derivative security | 7,500 | $59.17 | 108,250 |
| 06/12/07 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Open market or private sale of non-derivative or derivative security | 8,000 | $29.88 | 85,750 |
| 11/12/04 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 8,000 | $3.88 | 8,000 |
| 11/12/04 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 8,000 | $20.57 | -- |
| 11/12/04 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 8,000 | -- | -- |
| 08/11/15 |
Chief Operating Officer
|
Chief Operating Officer | Form 4 | Open market or private purchase of non-derivative or derivative security | 10,000 | $1.98 | 308,050 |
| 11/12/04 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 12,000 | $9.20 | 12,000 |
| 11/12/04 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 12,000 | $20.57 | -- |
| 11/12/04 |
Vice President of Operations
|
Vice President of Operations | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 12,000 | -- | 13,000 |
* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.