X0202 4 2005-04-01 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 2005-04-01 4 J 0 954 10.48 A 3274689 I by EnCap Energy Capital Fund IV L.P. and PHAWK LLC Common Stock 2005-05-25 4 J 0 10000 0 A 3274689 I by EnCap Energy Capital Fund IV L.P. and PHAWK LLC Common Stock 2005-05-25 4 J 0 1168 8.56 A 3274689 I by EnCap Energy Capital Fund IV L.P. and PHAWK LLC Represents 477 shares of Common Stock granted to EnCap Energy Capital Fund IV, L.P. as compensation for David B. Miller serving on the Issuer's Board of Directors and 477 shares of Common Stock granted to EnCap Capital Fund IV, L.P. as compensation for D. Martin Phillips serving on the Issuer's Board of Directors Represents 5,000 shares of Common Stock granted to David B. Miller as compensation for serving on the Issuer's board of directors and assigned by David B. Miller to EnCap Energy Capital Fund IV, L.P.and 5,000 shares of Common Stock granted to D. Martin Phillips as compensation for serving on the Issuer's board of directors and assigned by D. Martin Phillips to EnCap Energy Capital Fund IV, L.P. Represents 584 shares of Common Stock granted to EnCap Energy Capital Fund IV, L.P. as compensation for David B. Miller serving on the Issuer's board of directors and 584 shares of Common Stock granted to EnCap Capital Fund IV, L.P. as compensation for D. Martin Phillips serving on the Issuer's board of directors Represents 28,932 shares owned by EnCap Energy Capital Fund IV, L.P. and 3,245,757 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 2005-05-25