UPDATE 1-Allergan investors owning 35 pct to demand special meeting -sources
September 11, 2014 at 10:32 AM EDT
NEW YORK, Sept 11 (Reuters) - Billionaire William Ackman has signed up Allergan investors who combined own at least 35 percent of the Botox maker to call a special shareholder meeting, according to people familiar with the matter, giving the hedge fund manager a victory in his fight to acquire Allergan.