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PRTA
Prothena Corporation plc
stock NASDAQ

At Close
Aug 4, 2026 3:59:57 PM EDT
8.48USD+2.106%(+0.17)329,912
7.12Bid   9.71Ask   2.59Spread
Pre-market
Jul 31, 2026 8:51:30 AM EDT
8.81USD+8.498%(+0.69)0
After-hours
Aug 4, 2026 4:00:30 PM EDT
8.49USD+0.059%(+0.01)88,521
OverviewOption ChainMax PainOptionsHistoricalExchange VolumeDark Pool LevelsDark Pool PrintsExchangesShort VolumeShort Interest - DailyShort InterestBorrow Fee (CTB)Failure to Deliver (FTD)ShortsTrendsNewsMore
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Market Cap
444.48M
CEO
Gene Kinney
Headquarters
Dublin, Ireland
Industry
Biotechnology
Related
SHPGALNYAMRNALKSMNKXLV
PRTA Stats
Avg. Vol. 10 Day
606,115
Avg. Vol. 30 Day
597,635
Employees
125
Market Cap
444,478,982
Shares Out.
52,353,237
On/Off Exchange
68%/32%
6 Month Beta
0.92
1 Year Beta
1.03
2 Year Beta
0.85
3 Year Beta
0.97
52 Week Low
6.70
52 Week High
11.80
SMA50
9.03
SMA200
9.63
1 Week
-0.82%
1 Month
-10.63%
3 Month
-21.32%
6 Month
-4.50%
1 Year
+22.33%
2 Year
-57.08%
5 Year
-84.48%
Profile
prothena corporation plc (nasdaq: prta) is a late-stage clinical biotechnology company focused on the discovery, development and commercialization of novel protein immunotherapy programs for the potential treatment of diseases that involve amyloid or cell adhesion. the company focuses on therapeutic monoclonal antibodies directed specifically to disease-causing proteins, and its antibody-based product candidates target a number of potential indications, including al amyloidosis (neod001), parkinson's disease and other related synucleinopathies (prx002), and novel cell adhesion targets involved in psoriasis and other inflammatory diseases (prx003). our lead program, neod001, is in a global phase 3 registration clinical trial – the vital amyloidosis study. there is also an on-going phase 1/2 trial. prx002 is in a phase 1 multiple ascending dose clinical trial, and prx003 is in a phase 1 single ascending dose clinical trial. prothena's elite team has a recognized track record both f

PRTA Stock Summary

Prothena Corporation plc (NASDAQ:PRTA) stock price today is $8.48, and today's volume is 329,912. PRTA is up 2.106% today. The 30 day average volume is 597,635. PRTA market cap is 444.48M with 52,353,237 shares outstanding.



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