‘(1) DIRECTORS, OFFICERS, AND PRINCIPAL STOCKHOLDERS REQUIRED TO FILE.—Every person who is directly or indirectly the beneficial owner of more than 10 percent of any class of any equity security (other than an exempted security) which is registered pursuant to section 12, or who is a director or an officer of the issuer of such security, shall file the statements required by this subsection with the Commission (and, if such security is registered on a national securities exchange, also with the exchange)