Macquarie Cook Energy, LLC operates as an energy trading and marketing company in North America. The company provides energy, risk management, and related financial services to customers and trading counter parties. It engages in providing natural gas supply, storage and transportation services, hedging solutions, and structured transactions. Macquarie Cook Energy offers short- and long-term energy services and solutions, including asset management and optimization, structured hedging, core needs fulfillment, and sophisticated risk management tools. The company serves natural gas producers, utilities, industrial users, and other large wholesale energy sector participants. Macquarie Cook Energy, LLC was founded in 1991 as Cook Inlet Energy Supply LLC and changed its name to Macquarie Cook Energy, LLC in 2006. The company is headquartered in Los Angeles, California. As of November 2005, Macquarie Cook Energy, LLC is a subsidiary of Macquarie Bank Group.