Prothena Corporation plc Ordinary Shares

PRTANASDAQUSD
8.79 USD
0.46 (4.97%)AT CLOSE (11:59 AM EDT)
8.78
0.01 (0.11%)
POST MARKET (AS OF 04:55 PM EDT)
Post Market
AS OF 04:55 PM EDT
8.78
0.01 (0.11%)
🔴Market: CLOSED
Open?$9.25
High?$9.38
Low?$8.63
Prev. Close?$9.25
Volume?656.3K
Avg. Volume?521.1K
VWAP?$8.80
Rel. Volume?1.26x
Bid / Ask
Bid?$7.61 × 100
Ask?$10.03 × 100
Spread?$2.42
Midpoint?$8.82
Valuation & Ratios
Market Cap?460.2M
Shares Out?52.4M
Float?42.2M
Float %?80.6%
P/E Ratio?N/A
P/B Ratio?1.47
EPS?-$2.89
Dividend?0.00%
Ex-Dividend?N/A

PRTA is currently priced at $8.79. The technical outlook is "Strong Sell" and the fundamental picture shows "Neutral". Notable factors include negative Return on Equity and a bullish Golden Cross on the moving averages. Valuation metrics place PRTA at a fair price relative to peers.

Technical & fundamental data as of Jun 5, 2026.

News
Profile
Prothena Corp PLC is a late-stage clinical biotechnology company that focuses on protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare and peripheral amyloid diseases. Prothena is developing and applying its proprietary CYTOPE technology to target a broad spectrum of intracellular disease pathways in the brain and periphery. The company's pipeline includes both wholly-owned and partnered programs like Prasinezumab, Coramitug (PRX004), BMS-986446 (PRX005), PRX019, TDP-43 CYTOPE, and PRX012-TfR, being developed for the potential treatment of Parkinson's disease, ATTR amyloidosis with cardiomyopathy, Alzheimer's disease, Amyotrophic lateral sclerosis (ALS), and other neurodegenerative diseases.
Employees
67
Market Cap
460.2M
Industry
PHARMACEUTICAL PREPARATIONS
Listed
2012-12-18
Address
77 SIR JOHN ROGERSON'S QUAY, BLOCK C
DUBLIN 2, L2 D02 VK60
Phone: 011-353-1-236-2500
Technical OutlookStrong Sell
Strong SellNeutralStrong Buy
Long-Term (Tide)? Bearish(-2/3)
Medium-Term (Wave)? Bearish(-3/3)
Short-Term (Ripple)? Bearish(-3/3)
MA Alignment?Mixed
Full Technical Analysis →
Fundamental OutlookNeutral
Strong SellNeutralStrong Buy
F-Score?
60
Z-Score?
44
Momentum?
82
Short Sent.?
19
Piotroski F-Score?5/9Mixed
Altman Z-Score?2.25Grey
Confidence?58%Low
Full Fundamental Analysis →
Short InterestVery High
Short % of Float?16.82%High
Short Interest?7.1M
Days to Cover?13.0
Free Float42.2M
Avg Daily Volume547.7K
Settlement Date2026-05-15
Financial Health
Current Ratio?10.43Strong
Quick Ratio?10.43Strong
Cash Ratio?10.13Strong
Debt/Equity?0.00Low
ValuationATTRACTIVELY VALUEDvs 1 peers + S&P 500
Score
83/100
P/E?
N/A
P/B?
Peers
100
S&P
88
1.47CHEAP
P/S?
Peers
100
S&P
13
7.94HIGH
P/FCF?
N/A
EV/EBITDA?
S&P
97
-1.4CHEAP
EV/Sales?
Peers
100
S&P
71
2.26CHEAP
Returns & Efficiency
ROE?
S&P
3
-48.4%WEAK
ROA?
S&P
3
-43.2%WEAK
Cash Flow & Enterprise
FCF?$-81436000
Enterprise Value?$130.7M
Fundamentals ratios updated end of day