It docks those with antitakeover defenses (Amgen), problem directors (Bank of America) and legal or regulatory problems (Merrill Lynch).
FORBES: A Matter of Trust
2.
In 1984 Gibbs helped fend off hostile shareholders bent on liquidating the company and engineered a poison pill antitakeover provision.
FORBES: Wild Frontier
3.
Last week, Esmark said it had adopted what is known as a poison pill plan, an antitakeover provision that is triggered if an entity attempts to acquire 15.0% or more of the company's common stock.