| Transaction Date | Filer | Title | Filing | Transaction Type | Shares Traded | Price | Total Held* |
|---|---|---|---|---|---|---|---|
| 02/06/18 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 1,394 | -- | 39,343 |
| 02/20/17 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | 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 | 893 | $10.10 | 25,928 |
| 02/13/17 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 12,547 | -- | 26,821 |
| 01/06/17 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | 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 | 522 | $9.85 | 14,274 |
| 02/20/16 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 1,341 | -- | 76,253 |
| 02/20/16 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | 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 | 2,273 | $1.04 | 73,980 |
| 02/09/16 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 28,125 | -- | 74,912 |
| 01/01/16 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | 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 | 2,612 | $1.87 | 46,787 |
| 12/22/15 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | Form 4 | Open market or private sale of non-derivative or derivative security | 1,000 | $1.86 | 49,399 |
| 02/11/15 |
VP of Reservoir Engineering
|
VP of Reservoir Engineering | Form 4/A | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 16,760 | -- | 50,399 |
* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.