KEY POINTS
  • Activist investors have taken stakes in Everbridge and Anaplan, which are both part of the struggling cloud index.
  • After several years of outperformance, cloud stocks have been battered to start 2021, leaving an opening for activists.
  • "We consider all opportunities to enhance shareholder value," Everbridge said in a press release, acknowledging receipt of a letter from Ancora Holdings.
Steven Birdsall, chief revenue officer of Anaplan Inc., left, and Frank Calderoni, president and chief executive officer of Anaplan Inc., center, talk to a trader during the company's initial public offering on the floor of the New York Stock Exchange in New York on Oct. 12, 2018.

Activist investors this week took aim at a beaten-down sector of the stock market: cloud software.

It started early Thursday, when Ancora Holdings sent a letter to the board of Everbridge, whose software helps companies respond to emergencies. Everbridge's last CEO resigned abruptly in December, and Ancora is urging the company to find a buyer rather than a new leader.