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Related to greenmail: poison pill
A practice in which a corporate raider buys a large amount of stock from another publicly-traded company and forces the latter to buy back the stock at a substantial premium in order to avoid a takeover. The corporate raider has no intention of actually buying the target company; it merely seeks to profit from the buyback. One refers to this buyback as a bon voyage bonus, as this enables the company to be left alone by the greenmailer. Some companies formulate anti-greenmail provisions in their charters or bylaws to prevent the situation from occurring in the first place.
A defensive maneuver aimed at thwarting a potential takeover in which the target firm purchases shares of its own stock from a raider at a price above that available to other stockholders, who are ordinarily excluded from the transaction. Funds to finance greenmail are often borrowed, in which case the target company may end up with substantial additional debt. Also called negotiated share repurchase. Compare antigreenmail provision. See also fair price amendment.