Prothena Corporation plc Share Price
NASDAQ: PRTA | Small CapProthena Corporation plc Stock Performance
Prothena Corporation plc Share Price Today
As of 30 October 2026, Prothena Corporation plc's share price is $8.88. The stock opened at $9.18, compared to its previous close of $9.10. During today's trading session, Prothena Corporation plc's share price traded between $8.75 and $9.18, with an average price of $8.96. Over the past 52 weeks, the stock has recorded a high of $11.77 and a low of $7.81. In terms of performance, Prothena Corporation plc's share price has declined by 19.82% over the last six months and is down 17.32% on a year-on-year basis.
Prothena Corporation plc Share Price Chart
Prothena Corporation plc Quarterly Profit & Loss
All figures in USD
Prothena Corporation plc Annual Profit & Loss
All figures in USD
About Prothena Corporation plc
Prothena Corp PLC is a late-stage clinical biotechnology company that focuses on protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare and peripheral amyloid diseases. Prothena is developing and applying its proprietary CYTOPE technology to target a broad spectrum of intracellular disease pathways in the brain and periphery. The company's pipeline includes both wholly-owned and partnered programs like Prasinezumab, Coramitug (PRX004), BMS-986446 (PRX005), PRX019, TDP-43 CYTOPE, and PRX012-TfR, being developed for the potential treatment of Parkinson's disease, ATTR amyloidosis with cardiomyopathy, Alzheimer's disease, Amyotrophic lateral sclerosis (ALS), and other neurodegenerative diseases.
Prothena Corporation plc Historical Returns
| Month | Open | Close | Change % |
|---|---|---|---|
Oct 2026 | $8.56 | $8.87 | +5.60% |
Sep 2026 | $9.28 | $8.40 | -7.59% |
Aug 2026 | $8.05 | $9.09 | +12.10% |
Jul 2026 | $9.84 | $8.11 | -17.26% |
Jun 2026 | $9.90 | $9.80 | -3.54% |
May 2026 | $11.13 | $10.16 | -8.26% |
Apr 2026 | $10.01 | $11.07 | +14.06% |
Mar 2026 | $9.11 | $9.71 | +11.93% |
Feb 2026 | $8.72 | $8.68 | -1.48% |
Jan 2026 | $9.43 | $8.80 | -7.66% |
Dec 2025 | $11.10 | $9.54 | -11.51% |
Nov 2025 | $10.82 | $10.78 | +0.33% |