Greenmail
Greenmail is a takeover defense tactic in which a target company buys back a large block of its own shares from a hostile activist or acquirer at a premium above the market price, in exchange for the investor's agreement to stop pursuing the acquisition or cease other hostile activities, effectively paying off the would-be acquirer at other shareholders' expense.
The term greenmail combines green (money) with blackmail, reflecting the coercive dynamic it describes. A corporate raider or activist investor accumulates a significant stake in a public company, then threatens a hostile takeover or proxy contest. The target company, seeking to eliminate the threat, privately negotiates the repurchase of the activist's shares at a price above the current market value, along with a standstill agreement in which the activist agrees to refrain from further hostile activity for a defined period.
Greenmail transactions were more prevalent in the 1980s merger wave than in subsequent decades. Notable historical greenmail payments included Walt Disney's repurchase of Saul Steinberg's stake in 1984 and Texaco's payment to Carl Icahn in 1984. These transactions generated substantial controversy: shareholders who were not party to the buyback saw the company pay a premium to one specific holder — typically at the expense of the general shareholder base — while management preserved its position.
The Internal Revenue Code was amended to impose a 50% excise tax on gain from greenmail payments, defined as payments to a shareholder who has held shares for less than two years and who has made or threatened a takeover. This provision significantly reduced the economic attractiveness of greenmail transactions and contributed to their decline. Additionally, Delaware courts examine greenmail transactions under an enhanced scrutiny standard rather than simple business judgment, requiring boards to demonstrate that the defensive repurchase was a proportionate response to a legitimate corporate threat.
Modern corporate governance standards maintained by institutional investors and proxy advisory firms treat greenmail as a significant governance failure. A board that authorizes a greenmail payment without shareholder approval will typically face adverse recommendations on director elections from governance-focused institutions. As a result, true greenmail transactions are rare in contemporary U.S. markets, though conceptually similar negotiated standstill agreements sometimes occur without the above-market price premium element.
Greenmail should be distinguished from conventional targeted share repurchases, in which a company buys back shares from a willing seller at negotiated market prices as part of an authorized buyback program. The defining characteristics of greenmail are the above-market premium and the hostile dynamic that motivates the repurchase.