PRTA - Prothena plc - Stock Forecast

Coverage Stock analysts Price Targets & Ratings Chart Insider Trading

PRTA is currently covered by 6 analysts with an average price target of $27.57. This is a potential upside of $16.92 (158.87%) from yesterday's end of day stock price of $10.65.

Prothena plc's activity chart (see below) currently has 125 price targets and 116 ratings on display. The stock rating distribution of PRTA is 72.22% BUY, 22.22% HOLD and 5.56% SELL.

Stock Analyst Price Targets - Review

Analysts average stock forecasts to be materialized ratio is 45.4% with an average time for these price targets to be met of 298.29 days.

Highest price target for PRTA is $14, Lowest price target is $4, average price target is $9.75.

Most recent stock forecast was given by JASON BUTLER from JMP on 01-Sep-2025. First documented stock forecast 28-May-2015.

Currently out of the existing stock ratings of PRTA, 13 are a BUY (72.22%), 4 are a HOLD (22.22%), 1 are a SELL (5.56%).

Analyst name

Rating

Current price target

Potential Upside

Previous price target

Date

Price targets met ratio

Average potential upside

Average Days to Hit Target

Performance score

Buy

$11

$1.18 (12.02%)

1 months 29 days ago
(01-Sep-2025)

1/7 (14.29%)

$2.73 (33.01%)

126

Buy

$14

$4.18 (42.57%)

$14

2 months 26 days ago
(04-Aug-2025)

4/14 (28.57%)

$6.97 (99.15%)

57

Hold

$10

$0.18 (1.83%)

$20

2 months 26 days ago
(04-Aug-2025)

4/9 (44.44%)

$2.97 (42.25%)

117

Sell

$4

$-5.82 (-59.27%)

$22

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

1/5 (20%)

$-0.6 (-13.04%)

65

Hold

$62

5 months 4 days ago
(26-May-2025)

5/14 (35.71%)

$47.95 (341.28%)

96

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

On average it took 298.29 days on average for the stock forecasts to be realized with a an average price target met ratio 45.4

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

MICHAEL YEE

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

Michael Yee works at JEFFERIES and has 12 price targets and 8 ratings on PRTA

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

Michael Yee with highest potential upside - $65.18

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

David Nierengarten with lowest potential downside - -$44.12

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