PRTA logo

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
Next Earnings Report
Feb 18, 2027
EPS est. $0.02 · Revenue est. $26.2M
Financing Filings (last 12 months)
0
No shelf registrations or offering prospectuses filed.

Upcoming Data Readouts (1)

Jun 2029
Est. completion
P3Parkinson's Disease
A Study to Evaluate the Efficacy and Safety of Intravenous (IV) Prasinezumab in Participants With Early-Stage Parkinson's Disease
NCT07174310n=900

Awaiting Results (2)

Trials past primary completion date but still active — data readout may be imminent.

Sep 2024
P2
A Study to Evaluate the Efficacy and Safety of Intravenous Prasinezumab in Participants With Early Parkinson's Disease
NCT04777331
Nov 2019
P2
A Study to Evaluate the Efficacy of Prasinezumab (RO7046015/PRX002) in Participants With Early Parkinson's Disease
NCT03100149

Recent Press Releases

Prothena Reports Third Quarter 2026 Financial Results and Business Highlights
Nov 5, 2026 · Business Wire
Prothena to Participate in the H.C. Wainwright 28th Annual Global Investment Conference
Sep 9, 2026 · Business Wire

SEC Filings (75)

Last two years from EDGAR. Insider Form 4s are on the Ownership tab.

FiledFormWhat it isLinks
Nov 5, 202610-QQuarterly reportDocumentIndex
Nov 5, 20268-KMaterial eventDocumentIndex
Oct 29, 20268-KMaterial eventDocumentIndex
Oct 2, 20268-KMaterial eventDocumentIndex
Aug 19, 2026SC 13G/APassive 5%+ stakeDocumentIndex
Aug 14, 2026SC 13G/APassive 5%+ stakeDocumentIndex
Aug 6, 202610-QQuarterly reportDocumentIndex
Aug 6, 20268-KMaterial eventDocumentIndex
Aug 6, 2026SC 13G/APassive 5%+ stakeDocumentIndex
Jul 29, 2026SC 13G/APassive 5%+ stakeDocumentIndex
May 15, 20268-KMaterial eventDocumentIndex
May 15, 2026SC 13G/APassive 5%+ stakeDocumentIndex
May 11, 2026SC 13G/APassive 5%+ stakeDocumentIndex
May 7, 202610-QQuarterly reportDocumentIndex
May 7, 20268-KMaterial eventDocumentIndex
Mar 27, 2026ARSAnnual report to holdersDocumentIndex
Mar 27, 2026DEFA14AProxy / shareholder voteDocumentIndex
Mar 27, 2026DEF 14AProxy / shareholder voteDocumentIndex
Mar 2, 2026EFFECTDocumentIndex
Feb 27, 20268-KMaterial eventDocumentIndex
Feb 27, 2026POS AMDocumentIndex
Feb 27, 202610-KAnnual reportDocumentIndex
Feb 27, 2026POSASRDocumentIndex
Feb 19, 20268-KMaterial eventDocumentIndex
Feb 13, 2026SC 13GPassive 5%+ stakeDocumentIndex
Dec 12, 20258-KMaterial eventDocumentIndex
Nov 19, 20258-KMaterial eventDocumentIndex
Nov 14, 2025SC 13G/APassive 5%+ stakeDocumentIndex
Nov 12, 2025SC 13G/APassive 5%+ stakeDocumentIndex
Nov 12, 2025SC 13G/APassive 5%+ stakeDocumentIndex
Nov 6, 202510-QQuarterly reportDocumentIndex
Nov 6, 2025DEFA14AProxy / shareholder voteDocumentIndex
Nov 6, 20258-KMaterial eventDocumentIndex
Oct 17, 2025SC 13G/APassive 5%+ stakeDocumentIndex
Oct 7, 2025DEFA14AProxy / shareholder voteDocumentIndex
Oct 7, 2025DEF 14AProxy / shareholder voteDocumentIndex
Sep 25, 2025PRE 14AProxy / shareholder voteDocumentIndex
Aug 27, 20258-KMaterial eventDocumentIndex
Aug 14, 2025SC 13GPassive 5%+ stakeDocumentIndex
Aug 14, 2025SC 13G/APassive 5%+ stakeDocumentIndex