X0306 4 2012-12-24 0 0001473061 PostRock Energy Corp PSTR 0001399151 Klvac David J 210 PARK AVE., STE. 2750 OKLAHOMA CITY OK 73102 0 1 0 0 Chief Financial Officer Common Stock 2012-12-24 4 S 0 5873 1.4528 D 84046 D This sale was effected pursuant to a Rule 10b5-1 trading plan to pay the tax liability incident to the vesting of restricted stock awards. The price reported in Column 4 is a weighted average price. The reporting person 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 sold at each separate price within the range set forth in this Form 4. These shares were sold in multiple transactions on December 24, 2012 at prices ranging from 1.45 - 1.46, inclusive. David J. Klvac by Stephen L. DeGiusti, Power of Attorney 2012-12-27