William S. Maxwell

NYMEX Holdings, Inc. provides a marketplace for trading energy futures & options in the crude oil, natural gas, heating oil and unleaded gasoline markets, as well as for trading precious and base metals futures & options in the gold, silver, and copper markets. It facilitates the buying & selling of energy and metal commodities for future delivery. The company was founded in 1872 and is headquartered in New York City, NY.

The New York Mercantile Exchange, Inc. provides markets for the trading and clearing of crude and heating oil, gasoline, natural gas, and electricity. The company is headquartered in New York, NY.

ONEOK Energy Services Co. LP provides physical and financial energy products and services. It operates power plants generating capacity and trades petroleum products. The company is headquartered in Tulsa, OK.

CenterPoint Energy Resources Corp. engages in owning and operating natural gas distribution systems. It also offers variable and fixed-price physical natural gas supplies primarily to commercial and industrial customers and gas utilities. It operates through the following segments: Natural Gas Distribution, Energy Services, Midstream Investments, and Other Operations. The Natural Gas Distribution segment refers to the intrastate natural gas sales and natural gas transportation and distribution for residential, commercial, industrial, and institutional customers. The Energy Services segment represents the company’s non-rate regulated gas sales and services operations. The Midstream Investments segment includes equity investment in Enable. The Other Operations segment provides unallocated corporate costs and inter-segment eliminations. CenterPoint Energy Resources was founded in 1882 and is headquartered in Houston, TX.