Wis. Stat. § 610.24: Insurers as fundholders.

All assets shall be held, invested and disbursed for the use and benefit of the insurer and no policyholder, member or beneficiary may have or acquire individual rights in such assets or become entitled to any apportionment or the surrender of any part of such assets, except as provided in the contract. An insurer may create, maintain, invest, disburse and apply any special funds necessary to carry out any purpose permitted by the laws of this state and the articles and bylaws of the insurer.