Prothena Corporation plc (PRTA) Research

Established in 2012 and headquartered in Dublin, Ireland, Prothena Corporation plc functions as a clinical-stage biopharmaceutical company focused on the discovery and advancement of novel therapeutic solutions for critical, life-threatening conditions, primarily within the United States. The company's pipeline features several key programs: Birtamimab, an investigational humanized antibody, is currently undergoing Phase III clinical trials for the treatment of AL amyloidosis. Prasinezumab, a humanized monoclonal antibody, is progressing through Phase IIb trials for Parkinson's disease. Prothena has also completed Phase I clinical trials for PRX004, indicated for Transthyretin amyloidosis, and is advancing PRX005 through Phase I for Alzheimer's disease. In its earlier-stage development, Prothena is exploring PRX012 for Alzheimer's disease, alongside a dual Aß-Tau vaccine designed for both the treatment and prevention of Alzheimer's disease. Prothena maintains strategic partnerships, including a comprehensive license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. for antibodies targeting alpha-synuclein. The company also collaborates with Bristol-Myers Squibb on antibody development.

Market snapshot

Symbol
PRTA
Price
$8.93
Day change
+5.18%
Market cap
$467.5M
P/E ratio
-3.17x
52-week range
5.64-11.8
Sector
Healthcare
Industry
Biotechnology
Next earnings
in 1 month
Analyst price target
$19.00

Peer companies

  • Bicycle Therapeutics plc (BCYC)
  • Corvus Pharmaceuticals, Inc. (CRVS)
  • 4D Molecular Therapeutics, Inc. (FDMT)
  • Gossamer Bio, Inc. (GOSS)
  • KalVista Pharmaceuticals, Inc. (KALV)
  • Neumora Therapeutics, Inc. Common Stock (NMRA)
  • Olema Pharmaceuticals, Inc. (OLMA)
  • Rigel Pharmaceuticals, Inc. (RIGL)

Recent insider activity

  • SCULLY WILLIAM P — P-Purchase (20000 shares) on 2026-06-16
  • SCULLY WILLIAM P — G-Gift (325000 shares) on 2026-06-15
  • SCULLY WILLIAM P — P-Purchase (125000 shares) on 2026-06-11
  • Isaacs Michael John — trade (0 shares) on 2026-06-08
  • Isaacs Michael John — trade (17500 shares) on 2026-06-08

Open Prothena Corporation plc (PRTA) in Thesis for live fundamentals, charts, options context, and portfolio-aware Copilot follow-ups.