Page 12 of 17 – SEC Filing
| May 19, 2017 |
| AF V Energy I AIV A5 L.P. |
| 20,392 |
| $ | 1.1644 |
| $ | 23,744.44 |
|
| May 19, 2017 |
| AF V Energy I AIV A6 L.P. |
| 20,264 |
| $ | 1.1644 |
| $ | 23,595.40 |
|
| May 19, 2017 |
| AF V Energy I AIV A7 L.P. |
| 19,818 |
| $ | 1.1644 |
| $ | 23,076.08 |
|
| May 19, 2017 |
| AF V Energy I AIV A8 L.P. |
| 20,079 |
| $ | 1.1644 |
| $ | 23,379.99 |
|
| May 19, 2017 |
| AF V Energy I AIV A9 L.P. |
| 20,340 |
| $ | 1.1644 |
| $ | 23,683.90 |
|
| May 19, 2017 |
| AF V Energy I AIV A10 L.P. |
| 20,340 |
| $ | 1.1644 |
| $ | 23,683.90 |
|
| May 19, 2017 |
| AF V Energy I AIV A11 L.P. |
| 20,079 |
| $ | 1.1644 |
| $ | 23,379.99 |
|
| May 19, 2017 |
| AF V Energy I AIV A12 L.P. |
| 19,818 |
| $ | 1.1644 |
| $ | 23,076.08 |
|
| May 19, 2017 |
| AF V Energy I AIV A13 L.P. |
| 23,886 |
| $ | 1.1644 |
| $ | 27,812.86 |
|
| May 19, 2017 |
| AF V Energy I AIV B1 L.P. |
| 143,422 |
| $ | 1.1644 |
| $ | 167,000.58 |
|
| May 22, 2017 |
| AF V Energy I AIV A1 L.P. |
| 25,548 |
| $ | 1.1959 |
| $ | 30,552.85 |
|
| May 22, 2017 |
| AF V Energy I AIV A2 L.P. |
| 25,318 |
| $ | 1.1959 |
| $ | 30,277.80 |
|
| May 22, 2017 |
| AF V Energy I AIV A3 L.P. |
| 25,348 |
| $ | 1.1959 |
| $ | 30,313.67 |
|
| May 22, 2017 |
| AF V Energy I AIV A4 L.P. |
| 25,482 |
| $ | 1.1959 |
| $ | 30,473.92 |
|
| May 22, 2017 |
| AF V Energy I AIV A5 L.P. |
| 25,613 |
| $ | 1.1959 |
| $ | 30,630.59 |
|
| May 22, 2017 |
| AF V Energy I AIV A6 L.P. |
| 25,453 |
| $ | 1.1959 |
| $ | 30,439.24 |
|
| May 22, 2017 |
| AF V Energy I AIV A7 L.P. |
| 24,892 |
| $ | 1.1959 |
| $ | 29,768.34 |
|
| May 22, 2017 |
| AF V Energy I AIV A8 L.P. |
| 25,220 |
| $ | 1.1959 |
| $ | 30,160.60 |
|
| May 22, 2017 |
| AF V Energy I AIV A9 L.P. |
| 25,548 |
| $ | 1.1959 |
| $ | 30,552.85 |
|
| May 22, 2017 |
| AF V Energy I AIV A10 L.P. |
| 25,548 |
| $ | 1.1959 |
| $ | 30,552.85 |
|
| May 22, 2017 |
| AF V Energy I AIV A11 L.P. |
| 25,220 |
| $ | 1.1959 |
| $ | 30,160.60 |
|
| May 22, 2017 |
| AF V Energy I AIV A12 L.P. |
| 24,892 |
| $ | 1.1959 |
| $ | 29,768.34 |
|
| May 22, 2017 |
| AF V Energy I AIV A13 L.P. |
| 30,002 |
| $ | 1.1959 |
| $ | 35,879.39 |
|
| May 22, 2017 |
| AF V Energy I AIV B1 L.P. |
| 180,143 |
| $ | 1.1959 |
| $ | 215,433.01 |
|
| May 23, 2017 |
| AF V Energy I AIV A1 L.P. |
| 25,548 |
| $ | 1.2289 |
| $ | 31,395.94 |
|
| May 23, 2017 |
| AF V Energy I AIV A2 L.P. |
| 25,318 |
| $ | 1.2289 |
| $ | 31,113.29 |
|
| May 23, 2017 |
| AF V Energy I AIV A3 L.P. |
| 25,348 |
| $ | 1.2289 |
| $ | 31,150.16 |
|
| May 23, 2017 |
| AF V Energy I AIV A4 L.P. |
| 25,482 |
| $ | 1.2289 |
| $ | 31,314.83 |
|
| May 23, 2017 |
| AF V Energy I AIV A5 L.P. |
| 25,613 |
| $ | 1.2289 |
| $ | 31,475.82 |
|
| May 23, 2017 |
| AF V Energy I AIV A6 L.P. |
| 25,453 |
| $ | 1.2289 |
| $ | 31,279.19 |
|
| May 23, 2017 |
| AF V Energy I AIV A7 L.P. |
| 24,892 |
| $ | 1.2289 |
| $ | 30,589.78 |
|
| May 23, 2017 |
| AF V Energy I AIV A8 L.P. |
| 25,220 |
| $ | 1.2289 |
| $ | 30,992.86 |
|
| May 23, 2017 |
| AF V Energy I AIV A9 L.P. |
| 25,548 |
| $ | 1.2289 |
| $ | 31,395.94 |
|
| May 23, 2017 |
| AF V Energy I AIV A10 L.P. |
| 25,548 |
| $ | 1.2289 |
| $ | 31,395.94 |
|
| May 23, 2017 |
| AF V Energy I AIV A11 L.P. |
| 25,220 |
| $ | 1.2289 |
| $ | 30,992.86 |
|
| May 23, 2017 |
| AF V Energy I AIV A12 L.P. |
| 24,892 |
| $ | 1.2289 |
| $ | 30,589.78 |
|
| May 23, 2017 |
| AF V Energy I AIV A13 L.P. |
| 30,002 |
| $ | 1.2289 |
| $ | 36,869.46 |
|
| May 23, 2017 |
| AF V Energy I AIV B1 L.P. |
| 180,143 |
| $ | 1.2289 |
| $ | 221,377.73 |
|
*The price per share of Common Stock reported in the table above is a weighted average price. The shares of Common Stock were purchased in multiple transactions at prices ranging from: $1.07 to $1.14, inclusive (May 18, 2017), $1.13 to $1.19, inclusive (May 19, 2017), $1.14 to $1.24, inclusive (May 22, 2017), and $1.20 to $1.26, inclusive (May 23, 2017). The undersigned undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in the table above.
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