X0306 4 2018-06-19 0 0001431372 Gastar Exploration Inc. GST 0001348370 Gerlich Michael A 1331 LAMAR, SUITE 650 HOUSTON TX 77010 0 1 0 0 Senior VP & CFO Common Stock 2018-06-19 4 D 0 240000 0.70 D 2374824 D On June 19, 2018, the Issuer entered into an agreement with the Officer to cancel 240,000 restricted shares of common stock that were scheduled to vest on August 1, 2018 in consideration of a cash payment of $168,000 to the Officer. /s/ Michael A. Gerlich 2018-06-19