Iowa Code § 524.1408
A state bank owning at least ninety percent of the outstanding shares, of each class, of another corporation or limited liability company which it is authorized to own under this chapter may merge the other corporation or limited liability company into itself without approval by a vote of the shareholders of either the state bank or the subsidiary corporation or limited liability company. The board of directors of the state bank shall approve a plan of merger, mail the plan of merger to shareholders of record of the subsidiary corporation or holders of membership interests in the subsidiary limited liability company, and prepare and execute articles of merger in the manner provided for in section 490.1105. The articles of merger, together with the applicable filing fees, shall be delivered to the superintendent who shall, if the superintendent approves of the proposed merger and if the superintendent finds the articles of merger satisfy the requirements of this section, deliver them to the secretary of state for filing in the secretary of state's office. The secretary of state upon filing the articles of merger shall issue a certificate of merger and send the certificate to the state bank and a copy of it to the superintendent.
Iowa Code § 524.1408