Enron files for Chapter 11 bankruptcy.

Enron Corporation was an American energy, commodities, and services company based in Houston, Texas. It was led by Kenneth Lay and developed in 1985 via a merger between Houston Natural Gas and InterNorth, both relatively small regional companies at the time of the merger. Before its bankruptcy on December 2, 2001, Enron employed approximately 20,600 staff and was a major electricity, natural gas, communications, and pulp and paper company, with claimed revenues of nearly $101 billion during 2000. Fortune named Enron "America's Most Innovative Company" for six consecutive years.

The Enron scandal was an accounting scandal sparked by American energy company Enron Corporation filing for bankruptcy after news of widespread internal fraud became public in October 2001, which led to the dissolution of its accounting firm, Arthur Andersen, previously one of the five largest in the world. The largest bankruptcy reorganization in U.S. history at that time, Enron was cited as the biggest audit failure.