Conn. Agencies Regs. § 38a-138-7b
If a domestic insurance company, including any person controlling a domestic insurance company, is proposing a merger or acquisition pursuant to section 38a-130 of the Connecticut General Statutes, that person shall file a pre-acquisition notification form, Form E (Appendix E of sections 38a-138-1 to 38a-138-16, inclusive, of the Regulations of Connecticut State Agencies). Additionally, if a non-domiciliary insurance company licensed to do business in this state is proposing a merger or acquisition pursuant to section 38a-131 of the Connecticut General Statutes, that person shall file a pre-acquisition notification form, Form E (Appendix E of sections 38a-138-1 to 38a-138-16, inclusive, of the Regulations of Connecticut State Agencies). No pre-acquisition form need be filed if the acquisition is beyond the scope of section 38a-131 of the Connecticut General Statutes as set forth in section 38a-131(b) of the Connecticut General Statutes. In addition to the information required by Form E (Appendix E of sections 38a-138-1 to 38a-138-16, inclusive, of the Regulations of Connecticut State Agencies), the Commissioner may require an expert opinion as to the competitive impact of the proposed acquisition.
Conn. Agencies Regs. § 38a-138-7b