Mo. Rev. Stat. § 351.606: Statutory merger, foreign corporation, filing required.

Whenever a foreign corporation authorized to transact business in this state is a party to a statutory merger with any other foreign corporation as permitted by the laws of the state or* country under which it is organized, and such corporation is the surviving corporation, it shall file with the secretary of state a certificate showing the effective date of the merger issued by the proper officer of the state or country of the surviving corporation. It shall not be necessary for the corporation to procure either a new or an amended certificate of authority to transact business in this state unless the corporate name, corporate duration or the state of incorporation has changed.