Check out the companies making headlines after the bell Monday:
Xerox popped after activist investor Carl Icahn reported a 7.13 percent stake in the U.S. printer company. He said that the stock was undervalued, and he plans to "have talks with management," per The Wall Street Journal.
Shares of Brocade Communications plunged after reporting results of its fiscal-fourth quarter. Despite beating expectations on earnings, the company provided weak guidance for the upcoming year.