No person other than the issuer may make a tender offer for or a request or invitation for tenders of, or enter into any agreement to exchange securities for, seek to acquire or acquire, in the open market or otherwise, any voting security of a domestic insurer if, after the consummation thereof, the person would, directly or indirectly, or by conversion or by exercise of any right to acquire, be in control of the insurer, and no person may enter into an agreement to merge with or otherwise to acquire control of a domestic insurer unless, at the time the offer, request, or invitation is made or the agreement is entered into, or prior to the acquisition of the securities if no offer or agreement is involved, the person has filed with the department a statement containing the information required by this section and the offer, request, invitation, agreement, or acquisition has been approved by the director or his designee in the manner hereinafter prescribed.

For purposes of this section, a domestic insurer includes any other person controlling a domestic insurer unless the other person as determined by the director or his designee is either directly or through its affiliates primarily engaged in business other than the business of insurance. As used in this section, "person" does not include any securities broker holding, in the usual and customary brokers' function, less than twenty percent of the voting securities of an insurance company or of any person which controls an insurance company.