Harwood Feffer LLP ( www.hfesq.com) is investigating potential claims against the board of directors of Petrohawk Energy Corporation ("Petrohawk" or the "Company") (NYSE: HK) concerning BHP Billiton’s proposed offer to purchase the Company for $38.75 per share in a transaction valued at approximately $12.1 billion. Our investigation concerns whether the board of directors is undertaking a fair process to obtain fair consideration for all shareholders of Petrohawk. If you own shares of Petrohawk and would like to learn more about these claims or if you wish to discuss this matter and have any questions or information concerning this announcement, please contact Robert I. Harwood, Esq. at email@example.com or Peter W. Overs, Jr., Esq. at firstname.lastname@example.org. You may also call them at (877) 935-7400. For more information about class actions, or to sign up online, please visit our website: www.hfesq.com . Harwood Feffer LLP is a national shareholder litigation firm. Harwood Feffer LLP is devoted to protecting the interests of individual and institutional investors in shareholder actions in state and federal courts nationwide. Attorney Advertising. © 2011 Harwood Feffer LLP. The law firm responsible for this advertisement is Harwood Feffer LLP ( www.hfesq.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter.