#1 Aubrey McClendon

Aubrey McClendon co-founded Chesapeake Energy Corporation in 1989, and was its CEO till 2012. In 2005 McClendon was named one of America's top-performing executives by Forbes Magazine.

It was announced on October 10, 2008, that McClendon sold approximately 33.4 million shares, approximately 90 percent of his stock in Chesapeake Energy, for $16.52 per share to meet a margin call after the drop in the U.S. stock market that week. The stock had been worth as much as $74.00 per share in the year prior to the sale, a loss of nearly $1.92 billion.

On April 18, 2012, a Reuters report revealed that McClendon borrowed as much as $1.1 billion against his personal stake in thousands of company wells, raising the potential for conflicts of interest and raised questions on the corporate governance and business ethics of Chesapeake Energy's senior management. On May 1, 2012, Chesapeake's board announced that an independent, non-executive chairman would be named and that McClendon would relinquish his position as chairman of the Chesapeake Energy board.

Later in June, Chesapeake appointed Archie W. Dunham as chairman, replacing McClendon, who retained his position as CEO. McClendon retired from the company on April 1, 2013.

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