Noun
activist investor (plural activist investors)
a person or a group purchasing and using an equity stake in a publicly traded corporation to put public pressure on its management, with the goal of effecting a change
Activist investor Carl Icahn, who has a 4.2 percent stake in HP and a 10.9 percent stake in Xerox, in December urged HP shareholders who agreed with a merger with Xerox to reach out to the PC maker's directors for immediate action. Source: Internet
Activist investor Elliott Management wants to make changes at the social media company, the Bloomberg News noted Friday, citing sources familiar with the matter. Source: Internet