Rare disease specialist Shire said on Wednesday it was willing to recommend a sweetened $64 billion offer from Japan's Takeda Pharmaceutical to shareholders, in what would be the biggest acquisition of a drug company this year.
But shares in Takeda extended recent losses, tumbling 7 percent as investors fretted over its ability to buy a company twice its size, raising doubts about whether Shire shareholders will accept a bid that is 56 percent in new Takeda shares.
The stock slide — 18 percent since the news of a possible bid broke — makes the cash-and-share deal less appealing to Shire shareholders, some of whom may be reluctant or unable to hold Takeda shares.
"While this offer represents a solid improvement over Takeda's third bid (38 percent cash), we still wonder if it is enough to satisfy Shire shareholders," said Jefferies analyst David Steinberg.
Shire shares slipped 0.8 percent to 39 pounds by 0850 GMT, well below Takeda's 49 pounds offer, signaling skepticism about the deal as Takeda's falling stock price erodes the bid's $64 billion headline value.
Without a deal, Shire shares could fall back to mid-March levels of 30-32 pounds, pressuring management to find other ways to realize value. Prior to Takeda's approach, Shire was already considering divestments and a split in its operations.
It is now four weeks since Takeda first revealed it was considering a bid and the absence of firm interest from rivals means investors see only a low chance of an interloper emerging.
The latest development, first reported by Reuters, comes after London-listed Shire rejected four previous offers from Takeda.
The fifth offer is worth 49.01 pounds per share, comprised of 27.26 pounds per share in new Takeda shares and 21.75 pounds per share in cash. That represents a 4.3 percent premium to Takeda's fourth proposal on April 20 and an 11.4 percent premium to its first approach on March 29.
Shire, a member of Britain's benchmark FTSE 100 stock index, said its board agreed to extend a Wednesday regulatory deadline to May 8 so Takeda can conduct more due diligence and firm up its bid. Shire added the deadline may be extended further if needed.
Any deal is subject to the resolution of several issues, including completion of due diligence by Shire on Takeda, the Dublin-based company said.
A deal would significantly boost Takeda's position in gastrointestinal disorders, neuroscience, and rare diseases, including a blockbuster hemophilia franchise.
If successful, it would be the largest overseas acquisition by a Japanese company and propel Takeda, led by Frenchman Christophe Weber, into the top ranks of global drugmakers.
Weber, who became Takeda's first non-Japanese CEO in 2015, has said publicly it was looking for acquisitions to reduce its exposure to a mature Japanese pharmaceutical market.