Ackman, Valeant team up to pursue Allergan: DJ
April 21, 2014 at 16:24 PM EDT
Activist investor William Ackman of Pershing Square Capital and Valeant Pharmaceuticals International are teaming up to pursue a takeover of Allergan, according to Dow Jones report. Allergan shares rose 19 percent on the news. Click here to see what Allergan's shares are doing now..