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American businessman Charles Cawley has an estimated net worth of $500 million in 2012. With his massive net worth, Charles Cawley is considered as the wealthiest person in Delaware today. Charles Cawley was born in 1941 in New Jersey, U.S.A. He is a graduate of Georgetown University and is married to Julie P. Cawley. He  is currently based in Florida. Today, the corporation is a generous contributor to health institutions, arts and education.

Japanese businessman Eitaro Itoyama has an estimated net worth of $500 million as of April 2013 according to Forbes. He is one of the largest stakeholders in JAL National Airline.

American businessman and executive Ernie Boch Jr. has an estimated net worth of $500 million in 2012. Boch is the current President, Spokesman and Chief Executive of Boch Enterprises. Currently valued at $1 billion, Boch Enterprises include automobile dealerships in Massachusetts.

American businessman Greg Renker is the co-founder and co-chairman of Guthy-Renker LLC who has an estimated net worth of $500 million. Founded in 1988, it is a direct-response marketing company based in Santa Monica, California. It sells products around the world through infomercials and other direct-to-consumer marketing channels with annual sales of around $1 billion.

Baseball executive and real estate developer Fred Wilpon has an estimated net worth of $500 million in 2012.

American entrepreneur Marc Bell has an estimated net worth of $500 million in 2012. He is a managing partner at Managing Partner of Marc Bell Capital Partners LLC which is currently based in Boca Raton Florida. Founded in 2003, the firm holds investments in real estate, internet, publishing and entertainment ventures.

Hope Rockefeller Aldrich is the one of the members of the well-known Rockefeller family and she has an estimated net worth of $500 million. Born on May 17, 1938, she is the daughter of John D. Rockefeller, III, and Blanchette Hooker Rockefeller. She is also the younger sister of Jay Rockefeller, the prominent Democratic U.S. senator from West Virginia. Her great-grandfather is John D. Rockefeller I, who was the founder of Standard Oil.

American businessman Michael Saylor has an estimated net worth of $500 million in 2012. In addition to being one of the founders, Michael Saylor currently serves as the Chairman of the Board and Chief Executive Officer of MicroStrategy Incorporated. The company provides mobile software, cloud based services and business intelligence worldwide. Currently, he holds 29 patents on his inventions in various areas which include automation, business intelligence and security.

John Mara is the President, CEO and co-owner of the New York Giants and he has an estimated net worth of $500 million. Born in New York City on December 1, 1954, John Kevin Mara grew up in White Planes, New York. He attended Iona Preparatory School and graduated in 1972. He then went to Boston College and earned a B.S. in marketing cum laude. He also holds a law degree that he earned in 1979 from Fordham University.

Fox co-founded Lastminute.com alongside fellow employee Brent Hoberman. It was an online travel and gift business that generated great publicity, floating at the peak of the dot-com bubble. Lane Fox stepped down as the managing director of the company in November 2003, just as the profits started to fall. It was sold in early 2005 to Sabre Holdings for £577 million.