Sometimes you can't invest in a company because they are owned by someone else, such as
Entenmann's and 7up, both owned by Philip Morris (renamed Altria Group) or Taco Bell, KFC, and
Pizza Hut, owned by Tricon.
The company may also be a privately owned corporation such as Levi Strauss, Domino's Pizza,
Kinko's, or Hallmark Cards.