Pershing Square Files Lawsuit in Delaware Court of Chancery Seeking Confirmation that Allergan’s Rights Plan Is Not Triggered by Efforts to Call a Special Meeting

NEW YORK--(BUSINESS WIRE)--Pershing Square Capital Management, L.P. (“Pershing Square”) announced today that an affiliate has filed a lawsuit in the Delaware Court of Chancery seeking a declaratory judgment confirming that its actions in connection with the solicitation and receipt of revocable proxies to call a special meeting of shareholders of Allergan, Inc. (“Allergan”) (NYSE:AGN) will not trigger Allergan’s recently adopted poison pill.