Yesterday they fell 76p to 4252p after the Monday deadline for a deal passed and Pfizer said it was walking away.
It came as Pfizer boss
He criticised the rules – which have been recently revamped in order to protect British companies during bid attempts – for forcing Pfizer into the 'public spotlight'.
The current rules 'are not very conducive to getting to the right solution for shareholders,' he said.
As well as the glare of publicity and scrutiny over its tax affairs that came alongside the bid, takeover rules prevented Pfizer from increasing its 'final' pounds sterling 55 offer.
In issuing its ultimatum, the company locked itself into a legally binding obligation not to increase its bid – a move that cost it the deal. Speaking after the deal collapsed, the Pfizer chief said he offered the final sum 'because we could not get engagement on any substantive issues'. He said
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