May 2 (Reuters) -
* Ackman says initial investment in Valeant was passive, and
that was a mistake
* Ackman says if Pearson (LON:PSON) has made mistakes that caused
Valeant's market value to decline, he is paying the consequences
of that - CNBC
* Ackman says Buffett has been an important mentor
Further company coverage: VRX.TO