Prothena Corporation Plc Stock Performance
as on September 18, 2025 at 1:29 am IST
Day's Low
Day's High
$8.04$8.38
0.12%
Downside
4.10%
Upside
52 Week's Low
52 Week's High
$4.32$22.4146.34%
Downside
178.39%
Upside
Prothena Corporation Plc share price movements today
- Previous Close
- $8.16
- Open
- $8.19
- Volume
- 543.6K
- Day's Low - High
- $8.04 - $8.38
- 52 Week Low - High
- $4.32 - $22.41
Prothena Corporation Plc Historical Returns
- 1 Month Return
- -1.09 %
- 3 Month Return
- + 43.16 %
- 1 Year Return
- -62.81 %
- 3 Year Return
- -72.28 %
- 5 Year Return
- -21.54 %
Prothena Corporation Plc Stock Fundamentals & Key Indicators
Check Prothena Corporation Plc market cap, PE, PB, PEG ratios, dividend yield, and other key fundamental indicators.
Market Cap
$439.3M
EPS (TTM)
-4.59
Dividend Yield
0.00%
Quarterly Earnings Growth YOY
0.00%
PE Ratio (TTM)
-22.77
Industry PE ratio
-3.9281873111782475
P/B Ratio
0PEG Ratio
0.8
EBITDA
-248.1M
Revenue (TTM)
10.3M
Profit Margin
0.00%
Return On Equity TTM
0.00%
Prothena Corporation Plc Stock Valuation
Track how Prothena Corporation Plc P/E has moved over time to understand its valuation trends.
Prothena Corporation Plc in the last 5 years
Lowest (29.55x)
March 31, 2022
Today (-22.77x)
September 17, 2025
Industry (-3.93x)
September 17, 2025
Highest (60.30x)
September 30, 2021
Todayās Price to Earnings Ratio: -22.77x
Prothena Corporation Plc vs Peer Comparison
Compare market cap, revenue, PE, and other key metrics of Prothena Corporation Plc with its industry peers.
Company | Analyst View | Market Cap | 5 Years Return % | PE Ratio | Profit Margin % |
|---|---|---|---|---|---|
| BUY | $439.3M | -21.54% | -22.77 | 0.00% | |
| BUY | $60.5B | 252.04% | -505.15 | -12.96% | |
| NA | $39.0B | NA | NA | -3.89% | |
| BUY | $100.3B | 44.17% | 27.85 | 31.86% | |
| BUY | $59.6B | 1.78% | 14.1 | 31.37% |
Stock Returns calculator for Prothena Corporation Plc Stock including INR - Dollar returns
The Prothena Corporation Plc stock calculator helps Indian investors calculate returns based on the historical performance of the stock. Just choose your investment amount and duration to get insights and invest more confidently. See stock returns as well as the effect of dollar appreciation over different durations.
*Dollar Return is the profit earned when the US dollar rises in value compared to the Indian rupee.
Investment Value
ā¹1,00,000
Prothena Corporation Plc investment value today
Current value as on today
ā¹41,289
Returns
Returns from Prothena Corporation Plc Stock
Dollar Returns*
ā¹4,598 (+4.6%)
Analyst Recommendation on Prothena Corporation Plc Stock
Based on 17 analysts
76.47%
Buy
23.53%
Hold
0.00%
Sell
Based on 17 analysts, 76.47% of analysts recommend a 'BUY' rating for Prothena Corporation Plc. Average target price of $12
Prothena Corporation Plc Share Price Target
Get share price movements and forecasts by analysts on Prothena Corporation Plc.
What analysts predicted
32.92%UPSIDE
Target Price
$12
Current Price
$8.05
Analyzed by
17 Analysts
Target
$12.00
Prothena Corporation Plc target price $12, a slight upside of 32.92% compared to current price of $8.05. According to 17 analysts rating.
Prothena Corporation Plc Stock's Interest Amongst Investors
Search interest for Prothena Corporation Plc Stock has decreased by -36% in the last 30 days, reflecting a downward trend in search activity.
Time period: to
Prothena Corporation Plc Quarterly Profit & Loss
All numbers in Millions USD
Prothena Corporation Plc Annual Profit & Loss
All numbers in Millions USD
Prothena Corporation Plc Quarterly Cash Flow
All numbers in Millions USD
Prothena Corporation Plc Annual Cash Flow
All numbers in Millions USD
Global Institutional Holdings in Prothena Corporation Plc
Insights on Prothena Corporation Plc
Insights help you understand the recent movement of the company's critical parameters, giving you an overall view of the company.
POSITIVE IMPACTRevenue Rich
Revenue is up for the last 4 quarters, 970.0K ā 4.42M (in $), with an average increase of 38.4% per quarter
NO EFFECTAgainst Peers
In the last 1 year, Alnylam Pharmaceuticals, Inc. has given 68.9% return, outperforming this stock by 130.9%
- NO EFFECT
Against Peers
In the last 3 years, Alnylam Pharmaceuticals, Inc. has given 116.5% return, outperforming this stock by 188.8%
NEGATIVE IMPACTPrice Dip
In the last 6 months, PRTA stock has moved down by -36.4%
- NEGATIVE IMPACT
Profit Down
Netprofit is down for the last 3 quarters, -57.95M ā -125.76M (in $), with an average decrease of 56.4% per quarter
About Prothena Corporation Plc
| Organisation | Prothena Corporation Plc |
| Headquarters | 77 Sir John Rogerson?s Quay, Dublin, Ireland, D02 VK60 |
| Industry | Health Technology |
| CEO | Dr. Gene G. Kinney Ph.D. |
| E-voting on shares | Click here to vote |
Key Management of Prothena Corporation Plc
Name | Title |
|---|---|
Mr. Brandon S. Smith | Chief Operating Officer |
Dr. Wagner M. Zago Ph.D. | Chief Scientific Officer |
Ms. Karin L. Walker CPA | Chief Accounting Officer & Controller |
Mr. Mark C. Johnson C.F.A. | Vice President of Investor Relations |
Mr. Michael J. Malecek | Chief Legal Officer & Company Secretary |
Dr. Chad H. Swanson Ph.D. | Chief Development Officer |
Dr. Gene G. Kinney Ph.D. | President, CEO & Director |
Mr. Tran B. Nguyen M.B.A. | CFO & Chief Strategy Officer |
FAQs
What is Prothena Corporation Plc share price today?
Prothena Corporation Plc share price today is $8.05 as on at the close of the market. Prothena Corporation Plc share today touched a day high of $8.38 and a low of $8.04.
What is the 52 week high and 52 week low for Prothena Corporation Plc share?
Prothena Corporation Plc share touched a 52 week high of $22.41 on and a 52 week low of $4.32 on . Prothena Corporation Plc stock price today i.e. is closed at $8.05,which is 64.08% down from its 52 week high and 86.34% up from its 52 week low.
What is Prothena Corporation Plc's market capitalisation today?
Prothena Corporation Plc market capitalisation is $0.00T as on .
How to invest in Prothena Corporation Plc Stock (PRTA) from India?
- Step 1: Open a free US stocks account on INDmoney App and transfer your Rupees into Dollars to your INDmoney US stocks account. For a step by step instruction, check How to Transfer Money to Your US Stocks Account .
- Step 2: Search for Prothena Corporation Plc on INDmoney app. Click on Buy button. You can invest as low as $1.5 in Prothena Corporation Plc Shares that will get you 0.1863 shares as per Prothena Corporation Plc share price of $8.05 per share as on September 18, 2025 at 1:29 am IST.
What is the minimum amount required to buy Prothena Corporation Plc Stock (PRTA) from India?
Indian investors can start investing in Prothena Corporation Plc (PRTA) shares with as little as ā¹87.816 or $1 (as of ) using the INDmoney app.
For example: If you want to invest $10 or ā¹878.16 in Prothena Corporation Plc stock (as per the Rupee-Dollar exchange rate as on ).
Based on Prothena Corporation Plc shareās latest price of $8.05 as on September 18, 2025 at 1:29 am IST, you will get 1.2422 shares of Prothena Corporation Plc. Learn more about
fractional shares .
What are the returns that Prothena Corporation Plc has given to Indian investors in the last 5 years?
Prothena Corporation Plc stock has given -21.54% share price returns and 20.01% dollar appreciation to an Indian investor in the last 5 years.
Read more about How do Currency Exchange Rates impact your returns on US Stock Investments?