"This highly complementary transaction aligns with and accelerates our strategy to build a global leading biotechnology company focused on rare diseases and speciality conditions," Shire's chief executive Flemming Ornskov said in a statement outlining the deal that could rise by a further USD 650 million.
Dyax's chief executive, Gustav Christensen, said the "transaction will deliver substantial value" to his company's shareholders amid a sustained period of sector consolidation.
He added that the deal highlights Dyax's "shared commitment to bringing innovative medicines to patients who suffer from the devastating effects of HAE" -- described in the statement as a "rare, debilitating genetic inflammatory condition".
"Even with this (Dyax) transaction, we will continue to have the financial firepower to pursue other value-added strategic acquisitions, including Baxalta," Ornskov said in today's statement.
Shire had a USD 30-billion offer for Baxalta turned down by the US group in August.
