Energy Future Holdings Corporation is an electric utility company headquartered in Energy Plaza in Downtown Dallas, Texas, United States. From 1998 to 2007, the company was known as TXU Corporation until its $45 billion leveraged buyout by Kohlberg Kravis Roberts, Texas Pacific Group and Goldman Sachs Capital Partners. That purchase was the largest leveraged buyout in history. As of February 2013, the company has been described as "struggling" which resulted in the April 29, 2014 filing for bankruptcy protection under Title 11 of the United States Bankruptcy Code.