PRTA - Prothena plc - Stock Forecast

Coverage Stock analysts Price Targets & Ratings Chart Insider Trading

PRTA is currently covered by 8 analysts with an average price target of $24.88. This is a potential upside of $16.67 (203.05%) from yesterday's end of day stock price of $8.21.

Prothena plc's activity chart (see below) currently has 92 price targets and 109 ratings on display. The stock rating distribution of PRTA is 72.97% BUY and 27.03% HOLD.

Stock Analyst Price Targets - Review

Analysts average stock forecasts to be materialized ratio is 42.2% with an average time for these price targets to be met of 288.29 days.

Highest price target for PRTA is $29, Lowest price target is $4, average price target is $20.83.

Most recent stock forecast was given by BRIAN ABRAHAMS from RBC on 05-Aug-2025. First documented stock forecast 29-May-2015.

Currently out of the existing stock ratings of PRTA, 27 are a BUY (72.97%), 10 are a HOLD (27.03%).

Analyst name

Rating

Current price target

Potential Upside

Previous price target

Date

Price targets met ratio

Average potential upside

Average Time (Days) For PT To Be Met

Performance score

Hold

$10

$1.8 (21.95%)

$20

30 days ago
(05-Aug-2025)

3/9 (33.33%)

$2.97 (42.25%)

135

Hold

$4

$-4.2 (-51.22%)

$22

3 months 7 days ago
(28-May-2025)

1/5 (20%)

$-0.6 (-13.04%)

65

Buy

$62

3 months 8 days ago
(27-May-2025)

5/14 (35.71%)

$47.95 (341.28%)

96

Buy

$6

$-2.2 (-26.83%)

$75

3 months 8 days ago
(27-May-2025)

3/5 (60%)

$1.42 (31.00%)

176

Buy

3 months 8 days ago
(27-May-2025)

2/13 (15.38%)

$47.38 (119.59%)

394

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

On average it took 288.29 days on average for the stock forecasts to be realized with a an average price target met ratio 42.2

Which analyst has the current highest performing score on PRTA (Prothena plc) with a proven track record?

WILLIAM TANNER

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

William Tanner has 4 price targets and 6 ratings on PRTA

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

Yasmeen Rahimi with highest potential upside - $79.83

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

David Nierengarten with lowest potential downside - -$44.12

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