Randall Lee Barnard

GTI Energy provides research, development and training services for the natural gas industries. It offers research and development, program management, technical services, analytical services, consulting, commercialization, training and information services. The company was founded in April 2000 and is headquartered in Des Plaines, IL.

Northwest Pipeline LLC owns and operates an interstate pipeline system for the mainline transmission of natural gas. It provides natural gas transportation services for markets in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California and Arizona, either directly or indirectly through interconnections with other pipelines. The company was founded in 1965 and is headquartered in Salt Lake City, UT.

Williams Gas Pipeline LLC provides natural gas transportation through pipelines. The company is a subsidiary of The Williams Co. The company is located in Houston, TX

Petrolera Entre Lomas SA is a hydrocarbons exploration and exploitation Company. It is engaged in the production of Oil and Gas in Cuenca Neuquina. The company was founded in 1968 and is headquartered in Río Negro, Argentina.

Transcontinental Gas Pipe Line Co. LLC is an interstate natural gas transmission company, which owns a natural gas pipeline system extending from Texas, Louisiana, Mississippi and the Gulf of Mexico through Alabama, Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, Pennsylvania and New Jersey to the New York City metropolitan area. Its customers include public utilities and municipalities that provide service to residential, commercial, industrial and electric generation end users. The company was founded on October 5, 1948 and is headquartered in Houston, TX.

Williams Partners LP owns, operates and acquires a diversified portfolio of complementary energy assets. It is engaged in the business of gathering, transporting and processing natural gas and fractionating and storing natural gas liquids. The company operates its business through the following segments: Gas Pipeline and Midstream Gas and Liquids. The Gas Pipeline segment includes interstate natural gas pipelines and pipeline joint venture investments. The Midstream Gas and Liquids segment includes natural gas gathering, treating and processing business and is comprised of several wholly owned and partially owned subsidiaries. Williams Partners was founded in February 2005 and is headquartered in Tulsa, OK.

Apco Oil & Gas International, Inc. operates as an international oil and gas exploration and production company. The company was founded on April 6, 1979 and is headquartered in Tulsa, OK.