Pfizer, Allergan scrap $160 billion deal after U.S. tax rule change

U.S. drugmaker Pfizer Inc and Ireland-based Allergan Plc walked away from their $160 billion merger on Wednesday, a major win for President Barack Obama, who has been pushing to curb deals in which companies move overseas to cut taxes. Pfizer said the decision was driven by new U.S. Treasury rules aimed at such deals, called inversions. The merger would have allowed New York-based Pfizer to cut its tax bill by an estimated $1 billion annually by domiciling in Ireland, where tax rates are lower.

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Pfizer, Allergan scrap $160 billion deal after U.S. tax rule change