Mo. Rev. Stat. § 356.131

The Missouri uniform securities law, chapter 409, shall not be applicable to nor govern any transaction relating to any securities of a professional corporation or a foreign professional corporation; except that, the antifraud provisions of section 409.101, or any successor law to section 409.101, and the procedural, enforcement, remedy and penalty provisions of chapter 409 relating thereto, shall be fully applicable to the transfer of securities issued by a professional corporation or a foreign professional corporation if such provisions would otherwise be applicable to such transfers.