Simplify the following text for a Grade 11 native English-speaking person.
Original: The Britannica has been owned by many different people , including Scottish publisher A & C Black , Horace Everett Hooper , Sears Roebuck and William Benton .
Simplified: Ownership has changed many times , past owners including the Scottish publisher A & C Black , Horace Everett Hooper , Sears Roebuck and William Benton .