Authorized Shares
The maximum number of shares a company is allowed to issue. Generally, the company's charter specifies the number of authorized shares, but shareholders can increase or decrease it according to procedures listed in the charter. Typically, the number of authorized shares is larger than the required amount in order to give a company the greatest amount of flexibility. Authorized shares are also called authorized capital stock or simply authorized stock.
Outstanding shares. The shares of stock that a corporation has issued and not reacquired are described as its outstanding shares. Some of but not all these shares are available for trading in the marketplace.
Float
What Does Float Mean?
The total number of a company's shares that are publicly owned and available for trading. The float is calculated by subtracting restricted shares from outstanding shares. Also known as free float.