Petrohawk Energy Corporation today announced the expiration of its offer to purchase for cash all or any part of its outstanding USD 600 million aggregate principal amount of 10.5% Senior Notes due 2014 and USD 800 million aggregate principal amount of 7.875% Senior Notes due 2015. The Offer expired at 5:00 PM New York City time on November 9th 2011.

An aggregate principal amount of USD 10,360,000 of the 2014 Notes and USD 389,000 of the 2015 Notes were tendered for purchase in the Offer. Accordingly, on 15 November, 2011, the Settlement Date of the Offer, the Company will repurchase the Notes tendered in the Offer and an aggregate principal amount of USD 589,640,000 of the 2014 Notes and USD 799,611,000 of the 2015 Notes will remain outstanding.

Petrohawk Energy Corporation, an indirect, wholly owned subsidiary of BHP Billiton Limited, is an oil and natural gas company engaged in the exploration, development and production of predominately natural gas properties located in the United States.