John Mars is a Wyoming-based billionaire scion who has a net worth of $54 billion. John Mars serves as the chairman of the multinational Mars corporation. A member of the prominent Mars family, he is the grandson of Frank C. Mars, who started the eponymous confectionery and food company in Tacoma, Washington in 1911. As chairman of the company, Mars has overseen a number of major acquisitions, including of the animal hospital company VCA.