Greenmail is a takeover defense in which a target company buys back the shares a hostile bidder (or raider) has accumulated, at a premium to the market price, in exchange for the raider's agreement to go away — typically a standstill agreement promising not to pursue the company for a set period. The word blends "greenback" (money) with "blackmail," capturing its essence: the company pays the raider off.
How it worked
In its 1980s heyday, the pattern was:
- A corporate raider quietly accumulated a large stake in a target and threatened a hostile takeover.
- To make the threat disappear, the target repurchased the raider's shares at a premium well above the market price.
- In return, the raider signed a standstill, agreeing not to buy more shares or bid for the company.
The raider walked away with a quick, large profit; the company was rid of the threat — and ordinary shareholders, who were not offered the same premium, were left worse off, having watched corporate cash flow to the raider.
Why it is condemned
Greenmail is widely regarded as an abuse:
- It enriches one shareholder (the raider) at the expense of all others, breaching the basic norm of equal treatment.
- It can amount to management buying its own job security with shareholders' money — paying to remove a threat to entrenchment rather than letting shareholders judge the bid.
- It rewards and encourages raiders to accumulate stakes purely to be bought out.
Why it is largely extinct
Greenmail has all but vanished from modern practice due to several reinforcing deterrents:
- Punitive U.S. tax. Federal law imposes a 50% excise tax on the gain a recipient realizes from greenmail, sharply reducing its appeal to raiders.
- Anti-greenmail charter provisions. Many companies adopted bylaws/charter amendments prohibiting premium buybacks of a large holder without shareholder approval.
- Better structural defenses. The poison pill (combined with a staggered board) gave boards a far more effective and less odious way to resist raiders, removing the need to pay greenmail in the first place.
- Reputational and legal exposure. Boards paying greenmail face shareholder litigation and fiduciary-duty scrutiny.
Today greenmail is mostly of historical interest — a defining excess of the 1980s takeover era — though the underlying dynamic occasionally resurfaces in softer forms (negotiated buybacks of an activist's stake), which critics still label "greenmail by another name."
See also
- Hostile takeover — An acquisition pursued against the wishes of the target company’s board.
- Poison pill — A defense that lets a target dilute a hostile bidder by issuing cheap shares to others.
- Staggered board — A board structure in which only a fraction (commonly one-third) of directors stand for election each year. Slows hostile takeovers by preventing a single annual meeting from replacing the full board.
- White knight — A friendly third-party bidder that a target seeks out to outbid an unwelcome hostile acquirer, usually on terms more favourable to incumbent management or shareholders.