(Updated - October 21, 2015 2:42 PM EDT)

Pershing Square's Bill ...

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Valeant Pharma (VRX) Calls Citron Report 'Erroneous'October 21, 2015 1:40 PM Valeant Pharmaceuticals Responds To Erroneous ReportOctober 21, 2015 1:39 PM Valeant meltdown costs investors billions; Ackman ups stakeOctober 21, 2015 1:01 PM Valeant Pharma (VRX) Halted on Circuit BreakerOctober 21, 2015 10:24 AM Citron Research says it has a 'smoking gun' on Valeant Pharma (VRX)October 21, 2015 10:10 AM