Shareholder is an individual, a certified or accredited investor, a business angel or a private company that holds shares of the company with the right to receive guaranteed revenue returns under the commitment terms outlined in the provisions with regard to revenue sharing in the company equivalent to the number of shares owned.

In some cases, certified and accredited investors, business angels and shareholders are granted with the right to participate in decision-making process.
An example of a certified or accredited investor with shareholder rights and significant control can be a gatekeeper, who has the right to decide on who the company will be entering contractual relationship with.