The term used under Rule 144 for a control person of a company: either a director, an executive officer, or a large-block shareholder (usually 10% or more). People who live in the same household as affiliates also have affiliate status, as do trusts or estates in which an insider has an interest or serves as a trustee. The shares affiliates own are also called control stock. An affiliate has restrictions and reporting requirements on company-stock sales under Rule 144 and Section 16(a). For details, see the sections of this website on Rule 144 and Section 16.