Ackman’s Pershing Square Holdings Loses 15.9% on Valeant

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Bill Ackman, founder and chief executive officer of Pershing Square Capital Management LP.

Photographer: Andrew Harrer/Bloomberg

Pershing Square Holdings, the publicly traded security of Bill Ackman’s activist hedge fund, extended losses over the past week amid attacks on Valeant Pharmaceuticals International Inc., bringing its decline this year to 15.9 percent.

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