Mark E. Robinson

Black Stone Minerals Co. LP operates as a fee mineral and royalty owner. Its services include leasing minerals to exploration and production companies and acquiring additional gas or oil properties for future leasing and development. The company was founded by Thomas L. Carter Jr. in 1980 and is headquartered in Houston, TX.

Part of Black Stone Minerals LP, Black Stone Minerals GP LLC engages in the acquisitions of mineral and royalty interests. The company is based in Houston, TX. Thomas L. Carter has been the CEO of the company since 2014.

El Paso Interim Corp. provides natural gas and related energy products in a safe, efficient and dependable manner. The company owns North America's interstate natural gas pipeline systems, which provides a stable base of earnings and cash flow and has a backlog of committed expansion projects. The company operates through three segments: Pipelines, Exploration and Production & Marketing. The Pipelines segment provides natural gas transmission, storage, and related services, primarily in the USA primarily through eight wholly or majority owned interstate pipeline systems and equity interests in two transmission systems. The Exploration and Production segment is engaged in the exploration for and the acquisition, development and production of oil, natural gas and NGL, in the US, Brazil and Egypt. The Marketing segment markets on behalf of its Exploration and Production segment and manages the price risks associated with its oil and natural gas production as well as manages remaining legacy trading portfolio. The company was founded by Paul Kayser in 1928 and is headquartered in Houston, TX.

Part of KeyCorp, SONAT Exploration Co. is a company that provides petroleum exploration. The company is based in Houston, TX.