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Activist Bill Ackman trims Pershing Square's Valeant stake

4:30 PM ET Thu, 31 Dec 2015

Activist investor Bill Ackman's Pershing Square Capital Management is cutting its stake in Valeant Pharmaceuticals, reports CNBC's Seema Mody.

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Activist Bill Ackman trims Pershing Square's Valeant stake

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