Prothena to Present at Upcoming Investor Healthcare Conferences

DUBLIN, Ireland, April 28, 2015 (GLOBE NEWSWIRE) -- Prothena Corporation plc (Nasdaq:PRTA), a late-stage clinical biotechnology company focused on the discovery, development and commercialization of novel protein immunotherapy programs, today announced that members of the senior management team will present and participate in investor meetings at the following upcoming investor conferences:

• Credit Suisse's Antibody Day on Wednesday, May 6, 2015 at 12:05 p.m. EDT in New York, NY
• Bank of America Merrill Lynch 2015 Health Care Conference on Wednesday, May 13, 2015 at 1:40 p.m. PDT at Encore at the Wynn in Las Vegas, NV
• UBS 2015 Global Healthcare Conference on Monday, May 18, 2015 at 10:00 a.m. EDT at Sheraton Times Square Hotel in New York, NY

Live webcasts of the above presentations can be accessed through the investor relations section of the Company's website at www.prothena.com. Following the live presentations, replays of the webcasts will be available on the Company's website for 90 days following the presentation date.

About Prothena

Prothena Corporation plc is a late-stage clinical biotechnology company focused on the discovery, development and commercialization of novel protein immunotherapy programs for the potential treatment of diseases that involve amyloid or cell adhesion. The Company is developing antibody-based product candidates that target a number of potential indications including AL amyloidosis (NEOD001), Parkinson's disease and other related synucleinopathies (PRX002), and psoriasis and other inflammatory diseases (PRX003).

For more information, please visit the Company's web site at www.prothena.com.

CONTACT: Investors: Tran Nguyen, CFO
         650-837-8535, IR@prothena.com
         
         Media: Angela Bitting
         925-202-6211, angela.bitting@prothena.com