By now everyone is aware that publicly traded Valeant Pharmaceuticals ($VRX) has teamed up with Bill Ackman to purchase Allergan (a private firm), the Botox producer. Allergan has a "poison pill" documented from 2012. Valeant spiked on the news and most of us are aware of Ackmans somewhat skeptical purchasing of options hand over fist:
Ackman Calls:
Ackman Total Trades:
Allergan had filed three separate documents for Poison Pills in 2012 according the SEC:
Allergan's Poison Pill from SEC in 2012:

