Original Plan Poison Pill
Also called preferred stock plan. An early poison pill antitakeover defense in which the firm issues a dividend of convertible preferred stock to its common stockholders. If an acquiring firm passes a trigger point of share ownership, preferred stockholders (other than the large block holder) can put the preferred stock to the target firm (force the firm to redeem it) at the highest price paid by the acquiring firm for the target’s common or preferred stock during the past year. If the acquirer merges with the target, the preferred can be converted into acquirer voting stock with a market value no less than the redemption value at the trigger point.