A proxy fight or proxy battle is an unfriendly contest for the control over an organization. The event usually occurs when corporation's stockholders develop opposition to some aspect of the corporate governance, often focusing on directorial and management positions. Corporate activists may attempt to persuade shareholders to use their proxy votes (i.e., votes by one individual or institution as the authorized representative of another) to install new management for any of a variety of reasons. Shareholders of a public corporation may appoint an agent to attend shareholder meetings and vote on their behalf. That agent is the shareholder's proxy.
In a proxy fight, incumbent directors and management have the odds stacked in their favor over those trying to force the corporate change. These incumbents use various corporate governance tactics to stay in power, including: staggering the boards (i.e., having different election years for different directors), controlling access to the corporation's money, and creating restrictive requirements in the bylaws. As a result, most proxy fights are unsuccessful. However, it has been recently noted that proxy fights waged by hedge funds are successful more than 60% of the time.
Due to their out-sized influence with many institutional investors, proxy advisors play a key role in many proxy fights. In many cases, the proxy firms end up determining the result of the contest.