This regulation is applicable to each domestic stock insurer which has any class of equity security held of record by one hundred or more persons; provided, however, that this regulation shall not apply to any insurer if ninety-five percent or more of its equity securities are owned or controlled by a parent or an affiliated insurer and the remaining securities are held of record by less than five hundred persons. A domestic stock insurer which files with the Securities and Exchange Commission forms of proxies, consents and authorizations complying with the requirements of the Securities Exchange Act of 1934, as amended, and the applicable regulations promulgated thereunder, shall be exempt from the provisions of this regulation with respect to any class of securities subject to SEC jurisdiction.