Petrohawk Energy Terminates Stockholder Rights Plan

Petrohawk Energy Corp.

Petrohawk announced the termination of the Company's Stockholder Rights Plan (the "Plan"). The Company entered into an amendment to its Plan, which accelerated the final expiration date of the Plan from October 14, 2009 to the close of business on June 10, 2009, effectively terminating the Plan as of 5:00 p.m. Houston, Texas time yesterday. Stockholders do not have to take any action as a result of this termination.

As a result of the termination of the Plan, the rights under the Plan will be de-registered under the Securities Act of 1934, as amended, and delisted from the New York Stock Exchange, and will not be listed or quoted on any other exchange. This action will have no effect on Petrohawk's common stock, which is listed on the New York Stock Exchange and registered under the Securities Act of 1934, as amended.