GlobeNewswire Inc | Sep 15, 2020 08:30AM EDT

September 15, 2020

DUBLIN, Ireland, Sept. 15, 2020 (GLOBE NEWSWIRE) -- Prothena Corporation plc (NASDAQ:PRTA), a clinical-stage company with expertise in protein dysregulation and a diverse pipeline of investigational therapeutics for neurodegenerative and rare peripheral amyloid diseases will hold an investor webcast today at 1:30 PM ET following Roches Top Abstract oral presentation of the clinical results from the Phase 2 PASADENA study today at the International Parkinson and Movement Disorder Society's MDS Virtual Congress 2020 (MDS Congress).

Both the Top Abstract oral presentation and the poster regarding PASADENA results from the ePoster Hall at the MDS Virtual Congress can be found on the MDS Virtual Congress website and also will be posted onwww.prothena.comunder the Investors tab in the Events and Presentations section following the presentation.

Prothena management will review the results presented at the MDS Virtual Congress during a live audio webcast and conference call today, September 15, at 1:30 PM ET. The webcast will be made available on the Companys website atwww.prothena.comunder the Investors tab in the Events and Presentations section. Following the live audio webcast, a replay will be available on the Companys website for at least 90 days.

To access the call via dial-in, please dial(877) 887-5215 (U.S. and Canada toll free) or (315) 625-3069 (international) five minutes prior to the start time and refer to conference ID number 1185004. A replay of the call will be available until September 29, 2020 via dial-in at (855) 859-2056 (U.S. and Canada toll free) or (404) 537-3406 (international), Conference ID Number 1185004.

About Prothena

Prothena Corporation plc is a clinical-stage company with expertise in protein dysregulation and a diverse pipeline of novel investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare peripheral amyloid diseases. Fueled by its deep scientific expertise built over decades of research, Prothena is advancing a pipeline of therapeutic candidates for a number of indications and novel targets for which its ability to integrate scientific insights around neurological dysfunction and the biology of misfolded proteins can be leveraged. Prothenas partnered programs include prasinezumab (PRX002/RG7935), in collaboration with Roche for the potential treatment of Parkinsons disease and other related synucleinopathies, and programs that target tau, TDP-43 and an undisclosed target in collaboration with Bristol-Myers Squibb for the potential treatment of Alzheimers disease, amyotrophic lateral sclerosis (ALS), frontotemporal dementia (FTD) or other neurodegenerative diseases. Prothenas wholly-owned programs include PRX004 for the potential treatment of ATTR amyloidosis, and programs that target A (Amyloid beta) for the potential treatment of Alzheimers disease. For more information, please visit the Companys website at www.prothena.com and follow the Company on Twitter @ProthenaCorp.

Media and Investor Contact:

Ellen Rose, Head of Communications650-922-2405, ellen.rose@prothena.com