Wis. Stat. § 618.32: Transfer of business.

(1) Report to commissioner. Any action by which a nondomestic insurer proposes to transfer to another person or to reinsure any part of its insurance business in this state, other than in the normal and usual course of business, shall be reported to the commissioner not less than 30 days in advance of the proposed effective date. The commissioner may defer the effective date for an additional period not exceeding 30 days by written notice to the insurer before expiration of the initial 30-day period.

(2) Disapproval. The commissioner may, within the 30-day period or its extension, prohibit the proposed action if it would be contrary to the law or to the interests of insureds, creditors or the public in this state.