David Mayo Carmichael

Texas Heart Institute provides an avenue for exchange of ideas relating to the clinical and research activities. It provide an avenue for exchange of ideas relating to the clinical and research activities among the present and former Cardiology fellows, trainees, and teaching staff of the Texas Heart Institute. The company was founded by Denton A. Cooley in 1989 and is headquartered in Houston, TX.

Founded in 1989, Carmichael Hill & Associates, Inc. is a registered investment advisor and hedge fund manager located in Gaithersburg, Maryland. The firm provides advisory services to qualified retirement plan sponsors and individual clients.

Part of Natural Resource Partners LP, GP Natural Resource Partners LLC owns, manages and leases a portfolio of mineral properties which includes coal and soda ash, oil & gas and construction aggregates. The company is based in Houston, TX. Corby J. Robertson has been the CEO of the company since 2002.

Valaris Plc engages in the provision of offshore contract drilling services to the international oil and gas industry. It operates its through the following segments: Floaters, Jackups and ARO, Others. The Floaters segment includes drill ships and semisubmersible rigs. The Jackups segment offers contract drilling service. The ARO segment focuses in offshore drilling services. The Others segment consists of management services on rigs owned by third-parties. The company was founded on July 3, 1905 and is headquartered in London, the United Kingdom.

ENSCO International, Inc. engages in the provision of contract drilling and marine transport services. The company was founded in 1987 and is headquartered in Houston, TX.

Tom Brown, Inc. engages in the exploration for and the acquisition, development and production of, natural gas, natural gas liquids and crude oil. It also engages in the marketing, gathering, processing and sale of natural gas and the drilling of gas and oil wells. The company is headquartered in Denver, CO

Part of Kinder Morgan, Inc., American Oil & Gas Corp is a natural gas transmission company. The company is based in Houston, TX. American Oil & Gas was acquired by KN Energy, Inc. on July 14, 1994 for $302 million.