A stock corporation is a for-profit corporation

For-profit corporation

A for-profit corporation is a corporation that is intended to operate a business which will return a profit to the owners. A for-profit corporation, depending on the jurisdiction to which it is incorporated, may be operated either as a stock corporation or as a non-stock corporation.A non-profit...

 which the ownership of the corporation

Corporation

A corporation is created under the laws of a state as a separate legal entity that has privileges and liabilities that are distinct from those of its members. There are many different forms of corporations, most of which are used to conduct business. Early corporations were established by charter...

 is expressed by shares of stock. This allows for the ownership of the corporation to be readily determined, as shares are property, and are transferrable as any other property such as money, subject to any conditions imposed such as restriction on resale. The owner of the shares of a corporation is a stockholder. If a stockholder owns at least 50% of a corporation's voting shares, plus one share, they have a controlling interest

Controlling interest

Controlling interest in a corporation means to have control of a large enough block of voting stock shares in a company such that no one stock holder or coalition of stock holders can successfully oppose a motion...

in the corporation, since they have more votes than all other owners combined.
Business meetings or board meetings of a stock corporation.