Shire plc (LSE: SHP, NASDAQ: SHPG) and Dyax Corp. (DYAX) today announced that Shire will acquire Dyax for $37.30 in cash per Dyax share, for aggregate upfront consideration of approximately $5.9 billion. Dyax shareholders may receive additional value through a non-tradable contingent value right (CVR) that will pay $4.00 in cash per Dyax share upon approval of DX-2930 in HAE, representing a potential additional $646 million in aggregate contingent consideration.