Mo. Rev. Stat. § 371.200: Stockholders not to have preemptive rights.

The holders of capital stock as such shall have no preemptive or preferential right to purchase or subscribe for any part of the unissued capital stock of the corporation of any class or for any new issue of stock of any class, whether now or hereafter authorized or issued, or to purchase or subscribe for any bonds or other obligations, whether or not convertible into stock of any class of the corporation, now or hereafter authorized or issued.