Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation. Its product pipeline includes Prasinezumab, an investigational humanized monoclonal antibody which is in Phase 3 clinical trial for the treatment of parkinson's disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in Phase 3 clinical trial for the treatment of transthyretin amyloidosis; BMS-986446, an anti-tau antibody which is in Phase 2 clinical trial to treat Alzheimer's disease; PRX019, an investigational antibody which is in Phase 1 clinical trial for the treatment of neurodegenerative diseases; and PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer's disease. In addition, it develops discovery- and late-preclinical-stage programs include TDP-43 CYTOPE for the treatment of amyotrophic lateral sclerosis; PRX012, a next-generation anti-Aß antibody which is in phase 1 clinical trial to treat Alzheimer's disease; and PRX012-TfR, a preclinical program for the treatment of Alzheimer's disease. It has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and master collaboration agreement with Bristol Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. Prothena Corporation plc was incorporated in 2012 and is based in Dublin, Ireland. Show more

77 Sir John Rogerson’s Quay, Dublin, D02 VK60, Ireland

Biotechnology
Healthcare

Market Cap

493.6M

52 Wk Range

$4.32 - $13.73

Previous Close

$9.17

Open

$9.10

Volume

467,125

Day Range

$8.96 - $9.20

Enterprise Value

194.5M

Cash

307.5M

Avg Qtr Burn

-23.31M

Insider Ownership

19.20%

Institutional Own.

88.65%

Qtr Updated

12/31/25


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Drug & IndicationStage & EventCatalyst Date
Prasinezumab Details
Parkinson's disease

Phase 3

Update

Coramitug (PRX004) Details
Transthyretin amyloidosis

Phase 3

Update

BMS-986446 (PRX005) Details
Alzheimer's disease

Phase 2

Data readout

PRX019 Details
Neurodegenerative disease

Phase 1

Data readout

PRX012 Details
Alzheimer's disease

Phase 1

Update

PRX123 Details
Alzheimer's disease

Phase 1

Initiation

Birtamimab Details
Amyloid light chain amyloidosis

Failed

Discontinued