• The Fortune 100 list includes leading companies from the most significant annual Fortune 500 list.

  • The Fortune 500 list has been in existence since 1955 and ranks companies by revenue for the reporting financial year.
  • In 1994, the Fortune 500 changed to include a wider range of company types from different sectors.
  • Recently, many technology, energy and medical companies have entered the top 100 companies.
  • The same big companies often make it into the top 10, even if their rankings change slightly from year to year, like Amazon and Walmart.