EXHIBIT 2
JOINT FILING AGREEMENT
The undersigned hereby agree that the Schedule 13D with respect to the Ordinary Shares of Prothena Corporation plc dated as of December 28, 2012 is, and any amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(f) under the Securities Exchange Act of 1934.
Dated: December 28, 2012 | ELAN CORPORATION, PLC | ||
By: | /s/ William F. Daniel | ||
Name: William F. Daniel | |||
Title: Executive Vice President and Company Secretary | |||
Dated: December 28, 2012 | ELAN SCIENCE ONE LIMITED | ||
By: | /s/ William F. Daniel | ||
Name: William F. Daniel | |||
Title: Company Secretary | |||