Before filing for bankruptcy in 2001, Enron Corporation was one of the largest integrated natural gas and electricity companies in the world. It marketed natural gas liquids worldwide and operated one of the largest natural gas transmission systems in the world, totaling more than 36,000 miles. It was also one of the largest independent developers and producers of electricity in the world, serving both industrial and emerging markets. Enron was also a major supplier of solar and wind renewable energy worldwide, managed the largest portfolio of natural gas-related risk management contracts in the world, and was one of the world's biggest independent oil and gas exploration companies. In North America, Enron was the largest wholesale marketer of natural gas and electricity. Enron pioneered innovative trading products, such as gas futures and weather futures, significantly modernizing the utilities industry. After a surge of growth in the early 1990s, the company ran into difficulties. The magnitude of Enron's losses was hidden from stockholders. The company folded after a failed merger deal with Dynegy Inc. in 2001 brought to light massive financial finagling. The company had ranked number seven on the Fortune 500, and its failure was the biggest bankruptcy in American history.
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