All shares reacquired by a corporation as the result of their conversion into or exchange for other shares of the corporation shall be deemed to be retired and shall automatically become authorized and unissued shares of the class to which they belong, unless the reissue thereof is prohibited by the articles of incorporation, in which case the authorized shares of such class shall be reduced to the extent of the shares so retired. The amount of stated capital theretofore represented by the reacquired shares shall automatically be transferred to the other shares into or for which they were converted or exchanged, to the extent of the aggregate stated capital represented by the other shares. If upon any conversion or exchange the amount of stated capital theretofore represented by the reacquired shares exceeds the total aggregate stated capital represented by the other shares, the corporation may at any time reduce its stated capital by an amount equal to any part or all of the excess by following the procedures for reduction of stated capital set forth elsewhere in this chapter.
§ 351.185, RSMo