Prothena Corporation plc(PRTA)

$8.76—

Chart

Prothena Corporation plc(PRTA)

NASDAQ

$8.76—

Chart Studio

PRTA(PRTA)

PRTA

Overview Stream Notebook Intel Chart History Fundamentals TTM Earnings Analysts News Financials Segments Insiders Institl.DCF Peers

Q4 2026 EPS Estimate

$-0.21

Oct 29, 2026 · Reports after close

Revenue Estimate

$10M

FY2028E EPS$0.17

FY2030E EPS$2.31

Analyst Sentiment

Wall St. Consensus

Buy

26 analysts·High coverage

Score

20 Buy (77%)4 Hold (15%)2 Sell (8%)

Rating Breakdown

Strong Buy

00%

Buy

2077%

Hold

415%

Sell

28%

Strong Sell

00%

Analyst ratings reflect Wall Street opinion, not guarantees. Historical accuracy varies by firm and sector.

Price Target Expectations

Bear

$19.00

+116.9%

Consensus

$24.50

+179.7%

Bull

$30.00

+242.5%

12-Month Target Range26 analysts

$19.00$24.50$30.00

Current $8.76Consensus

Current Price

$8.76

Upside to Consensus

$15.74

Price targets are 12-month analyst forecasts. Actual results depend on earnings, market conditions, and sector trends.

Earnings & Revenue Estimates

Forward Growth Estimates (YoY)

FY2027

Rev-68.32%

EPS—

FY2028

Rev+410.49%

EPS—

FY2029

Rev+48.80%

EPS—

Raw consensus estimates (low / average / high) from covering analysts.

Annual

Metric	FY2026E	FY2027E	FY2028E	FY2029E	FY2030E
Revenue Avg	$83M	$26M	$135M	$201M	$266M
Low	$56M	$20M	$101M	$150M	$199M
High	$110M	$32M	$161M	$240M	$318M
EBITDA Avg	$-60M	$-19M	$-97M	$-144M	$-190M
Low	$-79M	$-23M	$-116M	$-172M	$-228M
High	$-40M	$-14M	$-72M	$-108M	$-143M
EBIT Avg	$-60M	$-19M	$-97M	$-144M	$-191M
Low	$-79M	$-23M	$-116M	$-173M	$-229M
High	$-41M	$-14M	$-73M	$-108M	$-143M
Net Income Avg	$1M	$-52M	$-9M	$-9M	$124M
Low	$-16M	$-64M	$-36M	$-12M	$84M
High	$13M	$-40M	$96M	$-6M	$156M
EPS Avg	$-0.07	$-1.03	$0.17	$-0.17	$2.31
Low	$-0.29	$-1.18	$-0.67	$-0.22	$1.56
High	$0.25	$-0.75	$1.78	$-0.12	$2.90
Analysts (Rev / EPS)	4 / 4	4 / 3	4 / 3	2 / 1	2 / 1

Quarterly

Metric	Q3 2026	Q4 2026	Q1 2027	Q2 2027	Q3 2027	Q4 2027
Revenue Avg	$10M	$22M	$916,616	$887,448	$859,208	$831,866
Low	$10M	$22M	$916,616	$887,448	$859,208	$831,866
High	$10M	$22M	$916,616	$887,448	$859,208	$831,866
EBITDA Avg	$-7M	$-16M	$-656,882	$-635,979	$-615,741	$-596,146
Low	$-7M	$-16M	$-656,882	$-635,979	$-615,741	$-596,146
High	$-7M	$-16M	$-656,882	$-635,979	$-615,741	$-596,146
EBIT Avg	$-7M	$-16M	$-659,112	$-638,138	$-617,831	$-598,171
Low	$-7M	$-16M	$-659,112	$-638,138	$-617,831	$-598,171
High	$-7M	$-16M	$-659,112	$-638,138	$-617,831	$-598,171
Net Income Avg	$-12M	$1M	$-19M	$-18M	$-17M	$-16M
Low	$-12M	$1M	$-19M	$-18M	$-17M	$-16M
High	$-12M	$1M	$-19M	$-18M	$-17M	$-16M
EPS Avg	$-0.24	$0.03	$-0.36	$-0.34	$-0.32	$-0.30
Low	$-0.24	$0.03	$-0.36	$-0.34	$-0.32	$-0.30
High	$-0.23	$0.03	$-0.36	$-0.34	$-0.32	$-0.30
Analysts (Rev / EPS)	3 / 2	1 / 1	1 / 1	1 / 1	1 / 1	1 / 1

Earnings Surprises

Recent Analyst Actions

Jul 24, 2026H.C. Wainwright

H.C. Wainwright Reiterates Buy Rating on Prothena Corp (PRTA)

Target:$30.00

+251.7%from $8.53

Mar 13, 2026Stifel Nicolaus

Prothena (PRTA) Reiterated at Market Outperform by Citizens After Fireside Chat

Target:$19.00

+104.1%from $9.31

Dec 1, 2025JMP Securities

Prothena price target raised to $19 from $11 at Citizens JMP

Target:$19.00

+76.7%from $10.75

Dec 1, 2025Deutsche Bank

Prothena Corp (PRTA) PT Raised to $19 at Citizens: Discovery Engine Successful

Target:$19.00

+76.7%from $10.75

Oct 28, 2025Piper Sandler

Prothena Corp (PRTA) PT Raised to $36 as Piper Sandler Remains Bullish

Target:$36.00

+224.8%from $11.09

Oct 28, 2025UBS

Prothena price target raised to $36 from $15 at Piper Sandler

Target:$36.00

+218.4%from $11.31

Oct 7, 2025H.C. Wainwright

Prothena price target raised to $20 from $14 at H.C. Wainwright

Target:$20.00

+102.8%from $9.86

Sep 2, 2025JMP Securities

Prothena price target lowered to $11 from $29 at Citizens JMP

Target:$11.00

+33.0%from $8.27

Aug 14, 2024Oppenheimer

Prothena Corp (PRTA) PT Lowered to $62 at Oppenheimer

Target:$62.00

+213.6%from $19.77

Aug 9, 2024RBC Capital

Prothena Corp (PRTA) PT Lowered to $24 at RBC Capital

Target:$24.00

+22.0%from $19.68

May 9, 2024RBC Capital

Prothena Corp (PRTA) PT Lowered to $28 at RBC Capital

Target:$28.00

+21.6%from $23.03

Dec 21, 2022Cantor Fitzgerald

Cantor Fitzgerald Maintains Overweight on Prothena Corp, Raises Price Target to $98

Target:$98.00

+66.2%from $58.98

Sep 29, 2022Oppenheimer

Oppenheimer Maintains Outperform on Prothena Corp, Raises Price Target to $110

Target:$110.00

+85.0%from $59.47

Sep 28, 2022RBC Capital

RBC Capital Maintains Outperform on Prothena Corp, Raises Price Target to $52

Target:$52.00

-6.1%from $55.39

May 25, 2022JMP Securities

JMP Securities Maintains Market Outperform on Prothena Corp, Lowers Price Target to $50

Target:$50.00

+92.7%from $25.95

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