The Pac-Man defense is an aggressive takeover defense in which the target turns the tables and attempts a hostile acquisition of the company that is trying to acquire it. Named after the arcade game — in which the pursued can suddenly eat its pursuers — it flips predator and prey: the hunted company starts buying up the raider's shares and bidding for it.
How it works
When confronted with a hostile bid, the target launches a counter-tender offer for the bidder's own stock, seeking to acquire or threaten to acquire the attacker. The aim is to force the original bidder to abandon its offer and instead defend itself — converting an attack into a mutual stand-off that the raider may decide is not worth continuing.
Why it is rarely used
The Pac-Man defense is dramatic but seldom deployed, for good reasons:
- Enormous cost. The target must fund a takeover of a company large enough to have bid for it — often requiring heavy debt and depleting its own resources.
- Mutual destruction. Both companies can load up on debt and damage themselves in the process, leaving the "winner" weakened regardless of outcome.
- Strategic incoherence. The target ends up trying to buy a company it may have no strategic reason to own, purely as a defensive maneuver.
- It can backfire. If the counter-bid fails, the target has spent heavily and may emerge more vulnerable than before.
For these reasons boards almost always prefer cheaper, less risky defenses — a poison pill, a staggered board, or finding a white knight — and the Pac-Man defense survives mainly as a famous edge case.
The canonical example: Bendix–Martin Marietta (1982)
The textbook illustration is the 1982 battle between Bendix and Martin Marietta. Bendix launched a hostile bid for Martin Marietta; Martin Marietta responded with a Pac-Man counter-bid for Bendix. The fight escalated, dragged in additional players (United Technologies and, ultimately, Allied Corporation), and ended with Allied acquiring Bendix to rescue it — a mutually damaging episode that became the enduring case study in why the Pac-Man defense is as dangerous to the user as to the target. Its rarity since is itself a comment on the tactic.
See also
- Hostile takeover — An acquisition pursued against the wishes of the target company’s board.
- Tender offer — A public offer made directly to shareholders to buy their shares, usually at a premium.
- Poison pill — A defense that lets a target dilute a hostile bidder by issuing cheap shares to others.
- 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.
- Crown-jewel defense — A tactic in which the target sells, spins or grants an option on its most valuable assets to a friendly party, making the company less attractive to a hostile acquirer.