Mary Nardella, Continental Resources
2012 SP500 Rank: 65
2011 SP500 Rank: 63
2011 Revenue: $350,000,000
Location: Bedford, MA
Mary Nardella was named CEO of Continental Resources in 2007 after serving the company for more than 25 years. She began her career in technology with New England Telephone, where she worked in the outside plant and engineering division.