Fortune 1000 is a reference to a list maintained by the American business
magazine Fortune. The list is of the 1000 largest American companies, ranked by
revenues. Eligible companies are any which are
incorporated or authorized to do business in the United States, and for which revenues are publicly available (this list has a larger universe than "
public companies", as the term is commonly understood, meaning "companies whose common stock trades on a
stock market"). The
Fortune 500 is the subset of the list that is its 500 largest companies.