IRVINE, Calif.--(BUSINESS WIRE)--Allergan, Inc. (NYSE: AGN) (“Allergan” or the “Company”) today filed a lawsuit in the United States District Court for the Central District of California against Valeant Pharmaceuticals International, Inc. (“Valeant”), Pershing Square Capital Management, L.P. (“Pershing Square”) and its principal, William A. Ackman, alleging that Valeant, Pershing Square and Mr. Ackman violated federal securities laws prohibiting insider trading, engaged in other fraudulent practices, and failed to disclose legally required information.
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