(Reuters) - Activist investor William Ackman has hired Credit Suisse (MLPN.P) in his fight to have Valeant Pharmaceuticals (VRX.TO) acquire Botox maker Allergan Inc. (AGN.N), a person familiar with the matter said on Tuesday.
Ackman's Pershing Square Capital Management owns 9.7 percent of Allergan and has been working with Canada's Valeant for months on an acquisition of Allergan in what would be, based on current value, the biggest deal of the year.
"Pershing Square has hired Credit Suisse for advice," said the source, who was not permitted to discuss the move publicly.
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