X0206 3 2016-10-13 0 0001679268 Mammoth Energy Services, Inc. TUSK 0000874499 GULFPORT ENERGY CORP 14313 N MAY AVE # 100 OKLAHOMA CITY OK 73134 1 0 1 0 Common Stock 9150000 D Gulfport Energy Corporation ("Gulfport") previously received 9,150,000 shares of common stock from the Issuer in connection with Gulfport's contribution of its membership interest in Mammoth Energy Partners LLC to the Issuer completed prior to the Issuer's initial public offering. /s/ Aaron Gaydosik, Chief Financial Officer 2016-10-13