PRTA - Prothena plc - Stock Forecast

Coverage Stock analysts Price Targets & Ratings Chart Insider Trading

PRTA is currently covered by 4 analysts with an average price target of $24.38. This is a potential upside of $15.54 (175.79%) from yesterday's end of day stock price of $8.84.

Prothena plc's activity chart (see below) currently has 204 price targets and 169 ratings on display. The stock rating distribution of PRTA is 75% BUY and 25% HOLD.

Stock Analyst Price Targets - Review

Analysts average stock forecasts to be materialized ratio is 44.72% with an average time for these price targets to be met of 257.14 days.

Highest price target for PRTA is $36, Lowest price target is $12, average price target is $24.38.

Most recent stock forecast was given by JASON BUTLER from JMP on 08-May-2026. First documented stock forecast 20-Mar-2015.

Currently out of the existing stock ratings of PRTA, 6 are a BUY (75%), 2 are a HOLD (25%).

Analyst name

Rating

Current price target

Potential Upside

Previous price target

Date of last PT

Price targets met ratio

Average potential upside

Average Days to Hit Target

Performance score

Buy Since 25-May-2022

$20

$11.16 (126.24%)

$19

5 months 4 days ago
(08-May-2026)

1/11 (9.09%)

$9.27 (86.39%)

126

Buy Since 07-Dec-2020

$30

$21.16 (239.37%)

$30

6 months 18 days ago
(24-Mar-2026)

5/19 (26.32%)

$21.27 (243.64%)

52

Hold Since 04-Nov-2022

$12

$1.98 (19.76%)

$11

7 months 22 days ago
(20-Feb-2026)

5/11 (45.45%)

$2.98 (33.04%)

99

Buy Since 27-Jan-2023

$36

$25.98 (259.28%)

11 months 14 days ago
(28-Oct-2025)

0/11 (0%)

$25.46 (241.56%)

Buy Since 20-Dec-2024

$18

$9.16 (103.62%)

$18

1 years 2 months 7 days ago
(05-Aug-2025)

0/5 (0%)

$10.97 (156.05%)

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What is PRTA (Prothena plc) average time for price targets to be met?

On average it took 257 days for the stock forecasts to be reached, with an average price target met ratio of 44.72%.

Which analyst most recently updated their price target on PRTA (Prothena plc)?

Jason Butler

Which analyst has the most public recommendations on PRTA (Prothena plc)?

Jason Butler has 5 price targets and 5 ratings on PRTA

Which analyst is the currently most bullish on PRTA (Prothena plc)?

Heather Behanna with the highest potential upside of $72.16

Which analyst is the currently most reserved on PRTA (Prothena plc)?

Tazeen Ahmad with the lowest potential downside of -$6.02
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