Black Stone Minerals, L.P. is an owner of oil and natural gas mineral interests in the United States. The Company's principal business is managing its existing portfolio of mineral and royalty assets to maximize its value and expanding its asset base through acquisitions of additional mineral and royalty interests. It owns mineral interests in approximately 14.6 million acres, with an average of over 47.8% ownership interest in that acreage. It also owns nonparticipating royalty interests in approximately 1.3 million acres and overriding royalty interests in over 1.4 million acres. These non-cost-bearing interests, which it refers to mineral and royalty interests, include ownership in over 45,000 producing wells. Its mineral and royalty interests are located in over 41 states and in approximately 60 onshore basins in the continental United States. Many of these interests are in active resource plays, including the Bakken/Three Forks, Eagle Ford Shale and Fayetteville Shale plays.