X0202 4 2005-01-11 0 0001059324 PETROHAWK ENERGY CORP HAWK 0001290913 EnCap Equity Fund IV GP, LP 1100 LOUISIANA SUITE 3150 HOUSTON TX 77002 0 0 1 0 Common Stock 2005-01-11 4 S 0 1705000 7.75 D 5819419 I by EnCap Energy Capital Fund IV L.P. and PHAWK LLC Common Stock 2005-01-12 4 S 0 68148 7.75 D 5819419 I by EnCap Energy Capital Fund IV L.P. and PHAWK LLC Represents 16,810 shares owned by EnCap Energy Capital Fund IV, L.P. and 5,802,609 shares owned by PHAWK, LLC. The reporting person disclaims any beneficial ownership of the securities owned by PHAWK, LLC or EnCap Energy Capital Fund IV, L.P. in excess of its pecuniary interest in such securities. EnCap Equity Fund IV GP, L.P., by EnCap Investments L.P., its general partner, by EnCap Investments GP, L.L.C., its general partner, by /s/ David B. Miller, Senior Managing Director 2005-01-13