In Ireland, Pfizer will post-merger pay a  12.5 per cent tax rate on any international income routed through the new Dublin operation. Photograph: Brendan McDermid/Reuters

Ireland’s exchequer is in line for an annual boost of up to €620 million following the announcement that Pfizer is buying rival Allergan in a $(...)

Ian Read, chief executive of Pfizer, and Brent Saunders, chief executive of Allergan. Photograph: Michael Nagle/Bloomberg

Drug giant Pfizer has announced a $160 billion (€150.5bn) takeover of Dublin-headquartered Allergan in a deal that will make Ireland home to the worl(...)

President Obama last year criticised US firms for becoming “magically” Irish through takeovers

It’s not us, it’s you. This should be the response to any political criticism directed Ireland’s way as multinationals swap American head-office addre(...)

Pfizer has struck a deal to buy Allergan in a transaction valued at about $160 billion.

Pfizer, the maker of Viagra and Lipitor, has struck a deal to buy Botox-maker Allergan in a transaction valued at about $160 billion, creating the wor(...)

Pfizer, the maker of Viagra, is set to merge with Irish-based Allergan, the maker of Botox

Pfizer and Allergan were racing to put the finishing touches to the biggest healthcare deal in history on Sunday afternoon, as the pair prepare to unv(...)

Jack Lew: The latest efforts by the US treasury secretary   to clamp down on inversions are irrelevant for the Pfizer deal, which meets previous thresholds laid down by his department for inversions.   Photograph: Simon Dawson/Bloomberg

The spluttering from Washington can be heard clearly across the Atlantic. The trouble is that the more it squares up on inversions, the more the Unite(...)

Pfizer is in negotiations with Dublin-based Allergan about buying the group in what would be the biggest ever “tax inversion” — allowing the company to report much lower tax costs by moving its domicile to Ireland. (Photograph: Scott Eisen/Bloomberg)

The chief executive of Allergan, in talks about selling itself to Pfizer to form the world’s largest drugmaker, has cautioned that any attempt by the(...)

To pull off the merger, Pfizer simply needs to ensure it has control of no more than 60 per cent of the merged company. Photograph: Michael Mac Sweeney.

Amid the clamour over Pfizer’s approach to Allergan about a possible merger, one thing has escaped attention. It will come as a relief to the US drug (...)

A man walks past Pfizer’s world headquarters in New York. The group is reportedly holding talks with Allergan on a possible merger

Drug companies Pfizer and Allergan have confirmed that they were engaged in “friendly” talks about a possible megamerger which would make Ireland home(...)

Pfizer tightened its full-year earnings forecast to between $2.23 and $2.27 per share from its prior outlook of $2.20 to $2.30

Pfizer reported stronger-than-expected quarterly results, helped by growing sales of its cancer drugs and demand for its medicines in emerging markets(...)