$8.36
2.11%
Nasdaq, Oct 02, 04:00 pm EDT.
ISIN
IE00B91XRN20
Symbol
PRTA

Prothena Corp. Plc Target price 2026 - Analyst rating & recommendation

Prothena Corp. Plc Classifications & Recommendation

Buy
67%
Hold
25%
Sell
8%

Prothena Corp. Plc Price Target

Target Price $20.40
Price $8.36
Potential
Number of Estimates 7
7 Analysts have issued a price target Prothena Corp. Plc 2027 . The average Prothena Corp. Plc target price is $20.40. This is higher than the current stock price. The highest price target is , the lowest is .
A rating was issued by 12 analysts: 8 Analysts recommend Prothena Corp. Plc to buy, 3 to hold and 1 to sell.
Analysts don't have a crystal ball either, but they do represent the opinion of the market quite well. You should not take the price potential and the ratings as a recommendation to act. Rather, they serve as an additional building block for your own opinion or stock analysis.
Analyst Estimates: Analysts believe that the Prothena Corp. Plc stock has an average upside potential 2027 of . Most analysts recommend the Prothena Corp. Plc stock at Purchase.

Sales and Margin forecast 2026, 2027 to 2033

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Select at least one metric to display the chart.


Quarter Annually
Dec '25 2026
Estimates
Revenue Million $ 9.68 84.84
92.84% 776.39%
EBITDA Margin -1,897.42% 0.00%
1,568.87% 100.00%
Net Margin -2,521.59% 6.84%
2,686.51% 100.27%

8 Analysts have issued a sales forecast Prothena Corp. Plc 2026 . The average Prothena Corp. Plc sales estimate is

$84.8m
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. This is
55.57% higher
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than the revenue of the last 12 months(TTM). The highest sales forecast is
$112m 106.24%
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, the lowest is
$51.1m 6.37%
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.

This results in the following potential growth metrics:

Revenue Estimates

2025 $9.7m 92.84%
2026
$84.8m 776.39%
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2027
$24.9m 70.69%
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2028
$137m 452.91%
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2029
$102m 25.61%
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2030
$271m 164.90%
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2031
$289m 6.64%
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2032
$382m 32.17%
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2033
$447m 17.02%
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8 Prothena Corp. Plc Analysts have issued a net profit forecast 2026. The average Prothena Corp. Plc net profit estimate is

$5.8m
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. This is
113.21% higher
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than the net profit for the last 12 months(TTM). The highest net profit forecast is
$32.6m 174.11%
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, the lowest is
$-25.9m 41.21%
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.

This results in the following potential growth metrics and future Net Margins:

Net Profit Estimates

2025 $-244m 99.57%
2026
$5.8m 102.38%
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2027
$-49.1m 944.75%
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2028
$7.3m 114.79%
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2029
$-81.5m 1,223.14%
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2030
$181m 322.00%
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2031
$76.8m 57.58%
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2032
$124m 61.51%
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2033
$146m 17.66%
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Net Margin

2025 -2,521.59% 2,686.51%
2026
6.84% 100.27%
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2027
-197.40% 2,985.96%
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2028
5.28% 102.67%
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2029
-79.73% 1,610.04%
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2030
66.82% 183.81%
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2031
26.58% 60.22%
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2032
32.48% 22.20%
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2033
32.66% 0.55%
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Earnings per share, P/E ratio and EV/sales Estimates 2026, 2027 to 2033

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Select at least one metric to display the chart.


Quarter Annually
Dec '25 2026
Estimates
Earnings Per Share $ -4.53 0.11
99.56% 102.43%
P/E 74.51
EV/Sales 1.66

8 Analysts have issued a Prothena Corp. Plc forecast for earnings per share. The average Prothena Corp. Plc EPS is

$0.11
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. This is
113.25% higher
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than earnings per share in the financial year 2025. The highest EPS forecast is
$0.63 175.90%
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, the lowest is
$-0.50 39.76%
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.

This results in the following potential growth metrics and future valuations:

Earnings Per Share

2025 $-4.53 99.56%
2026
$0.11 102.43%
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2027
$-0.95 963.64%
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2028
$0.14 114.74%
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2029
$-1.58 1,228.57%
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2030
$3.50 321.52%
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2031
$1.48 57.71%
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2032
$2.40 62.16%
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2033
$2.82 17.50%
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P/E ratio

Current -10.07 502.63%
2026
74.51 839.75%
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2027
-8.81 111.82%
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2028
59.61 776.62%
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2029
-5.30 108.89%
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2030
2.39 145.09%
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2031
5.63 135.56%
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2032
3.49 38.01%
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2033
2.96 15.19%
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Based on analysts' sales estimates for 2026, the Prothena Corp. Plc stock is valued at an EV/Sales of

and an P/S ratio of .

This results in the following potential growth metrics and future valuations:

EV/Sales

Current 2.59 80.18%
2026
1.66 35.83%
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2027
5.67 241.22%
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2028
1.03 81.91%
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2029
1.38 34.42%
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2030
0.52 62.25%
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2031
0.49 6.23%
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2032
0.37 24.34%
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2033
0.32 14.54%
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P/S ratio

Current 7.87 83.93%
2026
5.06 35.72%
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2027
17.26 241.21%
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2028
3.12 81.91%
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2029
4.20 34.42%
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2030
1.58 62.25%
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2031
1.49 6.23%
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2032
1.12 24.34%
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2033
0.96 14.55%
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Current Prothena Corp. Plc Upgrades & Downgrades

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Analyst Rating Action Date
Citizens
Locked
➜
Locked
Locked May 08 2026
RBC Capital
Locked
➜
Locked
Locked Feb 20 2026
Citizens
Locked
➜
Locked
Locked Dec 01 2025
HC Wainwright & Co.
Locked
➜
Locked
Locked Nov 07 2025
RBC Capital
Locked
➜
Locked
Locked Nov 07 2025
Piper Sandler
Locked
➜
Locked
Locked Oct 28 2025
HC Wainwright & Co.
Locked
➜
Locked
Locked Oct 07 2025
Analyst Rating Date
Locked
Citizens:
Locked
➜
Locked
May 08 2026
Locked
RBC Capital:
Locked
➜
Locked
Feb 20 2026
Locked
Citizens:
Locked
➜
Locked
Dec 01 2025
Locked
HC Wainwright & Co.:
Locked
➜
Locked
Nov 07 2025
Locked
RBC Capital:
Locked
➜
Locked
Nov 07 2025
Locked
Piper Sandler:
Locked
➜
Locked
Oct 28 2025
Locked
HC Wainwright & Co.:
Locked
➜
Locked
Oct 07 2025

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