Elan Announces Approval of Prothena Business Demerger

Elan Corporation, plc

announces that, at an Extraordinary General Meeting (EGM) held earlier today, the sole ordinary resolution to approve the demerger of the Prothena Business was duly passed. The full text of the resolution was included in the notice of the EGM dated November 12, 2012 which is available on the Company's website. The details of the votes lodged by proxy are also available on www.elan.com