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Prothena (PRTA)
NASDAQ:PRTA
PRTA Analyst Ratings
Moderate Buy
4 Buy
3 Hold
1 Sell
TipRanks enables you to focus on the analyst rating consensus of all analysts or only the top performers in the past 3 months
PRTA Stock 12 Month Forecast
Average Price Target
$12.00
▲(40.35% Upside)
| Highest Price Target$18.00 | Average Price Target$12.00 | Lowest Price Target$4.00 |
The highest, average, and lowest price target of all analysts. Click on ‘Top Analysts’ to focus on the best performers.
Detailed List of Analyst Forecasts
Detailed List of Analyst Forecasts
Citizens JMP
$29→$11
Buy
28.65%
Upside
Reiterated
09/02/25
Piper Sandler
$81→$15
Buy
75.44%
Upside
Reiterated
08/28/25
Chardan Capital
$18
Buy
110.53%
Upside
Reiterated
08/28/25
Bank of America Securities
$4
Sell
-53.22%
Downside
Reiterated
08/14/25
H.C. Wainwright
$14
Buy
63.74%
Upside
Reiterated
08/05/25
Prothena's Strategic Initiatives and Promising Alzheimer's Pipeline Drive Buy RatingValuation and Risks. Our price target of $14 is based on an equally weighted composite of (a) $18.54/share, as a 20x multiple of taxed and diluted $3 discounted back to 12/31/2025 at 14%, and (b) an NPV of $10/share (discount rate 14.0%, growth rate 1.0%). The assumptions are in line with the expected P/E multiple and discount rate of an early development stage biotechnology company.
RBC Capital
$18→$10
Hold
16.96%
Upside
Reiterated
08/05/25
Cantor Fitzgerald
―
Hold
―
Reiterated
06/20/25
Oppenheimer
―
Hold
―
Reiterated
06/16/25
Jefferies
$32→$6
Hold
-29.82%
Downside
Downgraded
05/27/25
Evercore ISI
―
Buy
―
Reiterated
02/21/25
Ranks
Any
Analyst Rating
Any
Upside/ Downside
Any
Action
Any
Citizens JMP
$29→$11
Buy
28.65%
Upside
Reiterated
09/02/25
Piper Sandler
$81→$15
Buy
75.44%
Upside
Reiterated
08/28/25
Chardan Capital
$18
Buy
110.53%
Upside
Reiterated
08/28/25
Bank of America Securities
$4
Sell
-53.22%
Downside
Reiterated
08/14/25
H.C. Wainwright
$14
Buy
63.74%
Upside
Reiterated
08/05/25
Prothena's Strategic Initiatives and Promising Alzheimer's Pipeline Drive Buy RatingValuation and Risks. Our price target of $14 is based on an equally weighted composite of (a) $18.54/share, as a 20x multiple of taxed and diluted $3 discounted back to 12/31/2025 at 14%, and (b) an NPV of $10/share (discount rate 14.0%, growth rate 1.0%). The assumptions are in line with the expected P/E multiple and discount rate of an early development stage biotechnology company.
RBC Capital
$18→$10
Hold
16.96%
Upside
Reiterated
08/05/25
Cantor Fitzgerald
―
Hold
―
Reiterated
06/20/25
Oppenheimer
―
Hold
―
Reiterated
06/16/25
Jefferies
$32→$6
Hold
-29.82%
Downside
Downgraded
05/27/25
Evercore ISI
―
Buy
―
Reiterated
02/21/25
Best Analysts Covering Prothena
1 Month
xxx
Success Rate
6/22 ratings generated profit
Average Return
-3.69%
reiterated a xxx
rating 5 days ago
Copying xxxxxxxxxxxxxxxxxx
trades and holding each position for 1 Month would result in 27.27% of your transactions generating a profit, with an average return of -3.69% per trade.
3 Months
xxx
Success Rate
7/22 ratings generated profit
Average Return
-7.17%
reiterated a xxx
rating 5 days ago
Copying xxxxxxxxxxxxxxxxxx
trades and holding each position for 3 Months would result in 31.82% of your transactions generating a profit, with an average return of -7.17% per trade.
1 Year
Success Rate
4/22 ratings generated profit
Average Return
-28.00%
reiterated a buy rating 5 days ago
Copying Jason Butler's trades and holding each position for 1 Year would result in 18.18% of your transactions generating a profit, with an average return of -28.00% per trade.
2 Years
xxx
Success Rate
2/15 ratings generated profit
Average Return
-56.97%
reiterated a xxx
rating last month
Copying xxxxxxxxxxxxxxxxxx
trades and holding each position for 2 Years would result in 13.33% of your transactions generating a profit, with an average return of -56.97% per trade.
The Best Analyst Covering tool allows you to follow the analysts who have the best success rates and average returns on a specific stock. Only analysts that gave a Buy or Sell rating on the stock in the past 12 months are eligible for inclusion in this tool. Follow the analysts of your choice to receive real-time updates when they publish a new rating.
PRTA Analyst Recommendation Trends
Rating
May 25
Jun 25
Jul 25
Aug 25
Sep 25
Strong Buy
8
8
8
5
5
Buy
0
0
0
0
1
Hold
10
12
14
11
7
Sell
1
1
1
0
0
Strong Sell
0
0
0
1
1
total
19
21
23
17
14
Each month's total comprises the sum of three months' worth of ratings.
PRTA Financial Forecast
PRTA Stock Forecast FAQ
What is PRTA’s average 12-month price target, according to analysts?
Based on analyst ratings, Prothena’s 12-month average price target is 12.00.
What is PRTA’s upside potential, based on the analysts’ average price target?
Prothena has 40.35% upside potential, based on the analysts’ average price target.
Can I see which stocks the top-ranking analysts are rating?
Yes, go to the Analysts’ Top Stocks tool to see stocks with a Strong Buy or Strong Sell analyst rating consensus, according to the top performers.
How can I follow the stock ratings of top Wall Street analysts?
Head over to our Expert Center to see a list of the top 100 Wall Street analysts and follow the analysts of your choice. Visit their profiles for more details about their stock ratings and see how they perform on a stock-by-stock basis.
Is PRTA a Buy, Sell or Hold?
Prothena has a consensus rating of Moderate Buy which is based on 4 buy ratings, 3 hold ratings and 1 sell ratings.
What is Prothena’s price target?
The average price target for Prothena is 12.00. This is based on 8 Wall Streets Analysts 12-month price targets, issued in the past 3 months.
The highest analyst price target is $18.00 ,the lowest forecast is $4.00. The average price target represents 40.35% Increase from the current price of $8.55.
The highest analyst price target is $18.00 ,the lowest forecast is $4.00. The average price target represents 40.35% Increase from the current price of $8.55.
What do analysts say about Prothena?
Prothena’s analyst rating consensus is a Moderate Buy. This is based on the ratings of 8 Wall Streets Analysts.
How can I buy shares of PRTA?
Open a brokerage account, see exclusive account opening deals on our Best Online Brokers page.