By how ownership is available for sale. If private, only those close to the business may be able to purchase stock, if the current ownership needs the capital. Public companies ownership or shares of stock will be available on a Stock Market of some sort. Or you read the book your professor told you to study, perhaps rent it from the library
A private company differs from a public company by how it does its research. A public company can dip into public capital markets as to where private companies cannot.
public company
Private
Mars is a private company.
Godrej is a private company.
ConocoPhillips is a Public company.
Disney is a public company.
No, a private company remains private even if a public company holds a percentage of its paid-up capital. The status of a company as public or private is determined by its articles of association and the provisions of the Companies Act in the relevant jurisdiction.
private
Reliance is a private sector but public limited company.
It is a private company.
Public