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 ...

The White House said Wednesday that the Treasury Department’s new rules aimed at curbing corporate inversions were not specifically targeted at the prospective Pfizer and Allergen merger that the ...

Less than 24 hours after the Obama administration escalated its battle against corporate tax inversions, the outcome of at least one major pending U.S. merger seemed clouded by doubt Tuesday. The ...