American businessman William Kellogg has an estimated net worth of $1 billion as of March 2013 according to Forbes. He is known to be the former Chief Executive Officer of Kohl's, a renowned chain of department stores.

William Kellogg started with the company as a store manager. Through a management buy-out in 1986, he took over the company together with partners Jay Baker and John Herma. During that time, Kohl's only had 40 stores in Wisconsin. Immediately, William Kellogg became the chain's Chief Executive Officer. Today, Kohl's has 1,067 stores operating in 49 states in the country. After becoming public in 1992, Kellogg decided to vacate his position in 1999. Currently, he holds over $450 million worth of stock at Kohl's and he is a stakeholder at CarMax, a used car conglomerate.