One of the largest owners of oil and natural gas mineral interests in the US, Black Stone Minerals holds an average of 48.1% ownership interest in mineral assets in 14.5 million acres. It also own nonparticipating royalty interests in 1.2 million acres and overriding royalty interests in 1.4 million acres. It also has ownership in 40,000 producing wells. Black Stone Minerals' mineral and royalty interests are located in 41 states and in 62 onshore basins. The breadth of its asset base and the long-lived, non-cost-bearing nature of the company's mineral and royalty interests allows it to add production and reserves from new and existing plays without investing more capital. The company went public in 2015.