X0306 4 2018-06-19 0 0000874499 GULFPORT ENERGY CORP GPOR 0001583381 Baldwin Steve 3001 QUAIL SPRINGS PARKWAY OKLAHOMA CITY OK 73134 0 1 0 0 VP of Reservoir Engineering Common Stock 2018-06-19 4 S 0 10000 11.0002 D 40918 D This transaction was executed in multiple trades at prices ranging from $11.00 per share to $11.005 per share, inclusive. The price reported above reflects the weighted average sale 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 sold at each separate price within the ranges set forth in this footnote. /s/ Steve R. Baldwin 2018-06-21