Allergan

Pfizer and Allergan are pursuing the biggest buyout in healthcare history, a $160 billion deal that would essentially send one of the biggest U.S. corporations overseas, or at least its legal domicile and principal executive offices.

Pfizer and Allergan are pursuing the biggest buyout in healthcare history, a $160 billion deal that would essentially send one of the biggest U.S. corporations overseas, or at least its legal domicile and principal executive offices.