A Form 4 is a Statement Of Changes In Beneficial Ownership Of Securities. The Form 4 must be filed by a reporting person before the end of the second business day following the day on which the subject transaction has been executed, or at such other time as the SEC shall establish, by rule, in any case in which the SEC determines that such 2-day period is not feasible. A reporting person is defined as any officer and/or beneficial owner who is buying or selling their company's stock