X0306 4 2018-05-29 0 0000874499 GULFPORT ENERGY CORP GPOR 0001721028 Westerman Paul D 3001 QUAIL SPRINGS PARKWAY OKLAHOMA CITY OK 73134 1 0 0 0 Common Stock 2018-05-29 4 P 0 10000 10.331 A 35488 D This transaction was executed in multiple trades at prices ranging from $10.3266 per share to $10.3379 per share, inclusive. The price reported above reflects the weighted average price. The reporting person undertakes to provide Gulfport Energy Corporation, any security holder of Gulfport Energy Corporation 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 this footnote. /s/ Paul D. Westerman 2018-05-29