The acquiring company makes a public offer at a fixed price above the current market price. Offers in the United States are regulated by the Williams Act. An acquiring company can also engage in a proxy fight, whereby it tries to persuade enough shareholders, usually a simple majority, to replace the management with a new one which will approve the takeover. Another method involves quietly purchasing enough stock on the open market, known as a "creeping tender offer", to effect a change in management. In all of these ways, management resists the acquisition, but it is carried out anyway.