Black Stone Minerals, L.P., together with its subsidiaries, owns oil and natural gas mineral interests in the United States. The company owns mineral interests in approximately 14.6 million acres; nonparticipating royalty interests in 1.3 million acres; and overriding royalty interests in 1.4 million acres in the Bakken/Three Forks, Eagle Ford Shale, Wolfcamp, Haynesville/Bossier, and Fayetteville Shale plays, as well as in the Lower Wilcox and Canyon Lime plays located in 41 states and in 61 onshore basins in the continental United States. It also owns other working interests, unrelated to mineral and royalty assets primarily in the Anadarko Basin, as well as in Permian and Powder River Basins. As of December 31, 2015, the company had a total estimated proved oil and natural gas reserves of 49,788 thousand barrels of oil equivalent. Black Stone Minerals, L.P. was founded in 1876 and is based in Houston, Texas.