Rule 144 is a regulation enforced by the U.S. Securities and Exchange Commission (SEC) that sets the conditions for the sale or resale of restricted, unregistered, and control securities.

Rule 144 provides an exemption from registration requirements for the sale of securities through the public markets if a number of specific conditions are met. The regulation applies to all types of sellers, in addition to issuers of securities, underwriters, and dealers.

The rule is designed to thwart insider trading and ensure that the buyers of such securities receive adequate information.