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Prothena Corporation plc

PRTA
Healthcare|Biotechnology|IE
$7.97
+0.08 (+1.01%)
DCF Value
$3.58
Tangible Book / Share
$5.23
Cash / Share
$5.28

About

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.

Stock Price

-20.9%(1Y)
1M
-7.4%
3M
-9.0%
6M
-25.7%
YTD
-16.5%
1Y
-24.3%
3Y
-77.4%
5Y
-86.4%

Pipeline Summary

17 total trials
7
Phase 1
6
Phase 2
3
Phase 3
0
Phase 4
Terminated: 5Completed: 9Recruiting: 1Active: 2

Active Trials (3)

A Study to Evaluate the Efficacy and Safety of Intravenous (IV) Prasinezumab in Participants With Early-Stage Parkinson's Disease
NCT07174310Parkinson's Disease
Phase 3Recruiting
Enrollment: 900 participants
A Study to Evaluate the Efficacy and Safety of Intravenous Prasinezumab in Participants With Early Parkinson's Disease
NCT04777331Parkinsons Disease
Phase 2Active
Enrollment: 586 participants
A Study to Evaluate the Efficacy of Prasinezumab (RO7046015/PRX002) in Participants With Early Parkinson's Disease
NCT03100149Parkinson's Disease
Phase 2Active
Enrollment: 316 participants

Key Facts

Market Cap$409.2M
Employees67 (-59% YoY)
CEOGene G. Kinney
IPO DateDec 20, 2012
Beta-0.33
52-Week Range$7.73 – $11.8
Avg Volume487,806
ExchangeNASDAQ

Ownership

Float85.5%
Shares Outstanding51.3M

Recent Insider Trades

SCULLY WILLIAM PGIFT
Oct 27, 2026566,444 shares
SCULLY WILLIAM PBUY
Oct 23, 202650,000 shares @ $8.07
SCULLY WILLIAM PBUY
Oct 22, 2026100,000 shares @ $8.19
SCULLY WILLIAM PBUY
Oct 14, 202610,000 shares @ $8.46
SCULLY WILLIAM PBUY
Oct 13, 2026100,000 shares @ $8.35

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Data last updated: Nov 9, 2026, 04:29 AM