5% / Insider Ownership
Shares held by insiders or individuals and institutions owning 5% or more of the total number of outstanding shares is known as 5% or Insider Ownership. A five percent stake in any large company is significant, and large companies typically don't have such shareholders.
That being said, there are 5% ownership positions held by individuals and institutions. For example, Bill Gates owns about 5% of the outstanding shares of Microsoft. The investment firm of Berkshire Hathaway owns about 8% of Coca Cola's outstanding shares.