Allergan investors owning 35 pct to demand special meeting: Reuters

Billionaire William Ackman has signed up Allergan investors that combined own at least 35 percent of the company to call a special shareholder meeting, giving the hedge fund manager a victory in his fight to acquire the Botox maker, Reuters reported. Ackman, whose Pershing Square Capital Management is Allergan's largest shareholder with a 9.7 percent stake, has teamed up with Canada's Valeant Pharmaceuticals International Inc to pursue a hostile takeover bid for the U.S.-based Allergan.

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