Most are saying the new rules likely will — and that the changes and their timing are squarely aimed at preventing New York-based Pfizer, the biggest drugmaker based in the U.S., from completing its ...

Drugmakers Pfizer Inc. (PFE) and Allergan Plc (AGN) are scrambling to determine whether to proceed with their plan to merge and move Pfizer's address - but not its operations or headquarters - to ...

Drugmakers Pfizer Inc. and Allergan Plc are scrambling to determine whether to proceed with their plan to merge and move Pfizer’s address — but not its operations or headquarters — to lower-tax ...