Mo. Rev. Stat. § 375.1074: Limitation on investments, domestic insurers.

Except as otherwise specified by Missouri law, no domestic insurer shall acquire an investment directly or indirectly through an investment subsidiary if, as a result of and after giving effect to the investment, the insurer would hold more than five percent of its admitted assets in the investments of all kinds issued, assumed, accepted, insured, or guaranteed by a single person.