Exclusive: Ackman’s Pershing Square makes $3.3 billion bet on Valeant

BOSTON (Reuters) – Hedge fund mogul William Ackman has purchased a $3.3 billion stake in Valeant Pharmaceuticals International , making his firm the company's fifth-largest stakeholder, a source familiar with the matter said on Monday.

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Exclusive: Ackman’s Pershing Square makes $3.3 billion bet on Valeant