Robert G. Croyle

Rowan Cos., Inc. engages in the provision of contract drilling services to the oil and gas industry. The company was founded by Charles Rowan and Archibald Rowan in 1923 and is headquartered in Houston, TX.

Boots & Coots International Well Control, Inc. provides a suite of integrated pressure control and related services to onshore and offshore oil and gas exploration and development companies, primarily in North America, Asia, South America, North Africa, West Africa, and the Middle East. The company was founded in 1978 and is headquartered in Houston, TX.

Rowan Cos. Ltd. engaged in the provision of offshore contract drilling services to the oil and gas industry. It operates through the following segments: Deepwater, Jack-ups, and ARO. The Deepwater segment included ultra-deepwater drill ships. The Jack-ups segment consists of self-elevating jack-up rigs. The ARO segment owned, managed, and operated offshore drilling units in Saudi Arabia. The company was founded on October 11, 2011 and was headquartered in London, the United Kingdom.

Part of Halliburton Co., Boots & Coots International Well Control, Inc. provides well control and firefighting services. The company is based in Houston, TX.

Magellan Midstream Holdings LP owns and controls Magellan GP LLC, which is the general partner of Magellan Midstream Partners LP(MMP). It is engaged in the transportation, storage and distribution of refined petroleum products through its subsidiaries. MMP's assets consist of an approximately 8,700-mile petroleum products pipeline system, including 49 petroleum products terminals serving the mid-continent region of the United States, referred to as the petroleum products pipeline system, seven petroleum products terminal facilities located along the United States Gulf and East Coasts, referred to as marine terminal facilities, and 27 petroleum products terminals located principally in the southeastern United States, referred to as inland terminals and a 1,100-mile ammonia pipeline system serving the mid-continent region of the United States. The company was founded in 2003 and is headquartered in Tulsa, OK.

Memorial Hermann Healthcare System is a not-for-profit organization that provces healthcare services. It specializes in cancer, children's health, digestive health, emergency services, heart and vascular care, neurosurgery, orthopedics, rehab and physical therapy, and sleep medicine. The firm also offer imaging and diagnostic services. The company was founded 1907 and is located in Houston, TX.

Part of Magellan Midstream Partners LP, Magellan GP LLC is a company based in Tulsa, OK. Aaron L. Milford has been the CEO of the company since 2004.