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PROTHENA CORP PLC (PRTA) Stock Fundamental Analysis

USA - Nasdaq - NASDAQ:PRTA - IE00B91XRN20 - Common Stock

9.97 USD
-0.39 (-3.76%)
Last: 12/15/2025, 8:00:02 PM
9.97 USD
0 (0%)
After Hours: 12/15/2025, 8:00:02 PM
Fundamental Rating

3

We assign a fundamental rating of 3 out of 10 to PRTA. PRTA was compared to 529 industry peers in the Biotechnology industry. While PRTA has a great health rating, there are worries on its profitability. PRTA does not seem to be growing, but still is valued expensively.


Dividend Valuation Growth Profitability Health

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0

1. Profitability

1.1 Basic Checks

PRTA had negative earnings in the past year.
PRTA had a negative operating cash flow in the past year.
In the past 5 years PRTA reported 4 times negative net income.
In the past 5 years PRTA reported 4 times negative operating cash flow.
PRTA Yearly Net Income VS EBIT VS OCF VS FCFPRTA Yearly Net Income VS EBIT VS OCF VS FCFYearly Net Income VS EBIT VS OCF VS FCF 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 0 50M -50M -100M -150M

1.2 Ratios

With a Return On Assets value of -79.53%, PRTA is not doing good in the industry: 67.30% of the companies in the same industry are doing better.
PRTA's Return On Equity of -95.07% is in line compared to the rest of the industry. PRTA outperforms 47.26% of its industry peers.
Industry RankSector Rank
ROA -79.53%
ROE -95.07%
ROIC N/A
ROA(3y)-19.63%
ROA(5y)-16.25%
ROE(3y)-23.37%
ROE(5y)-23.22%
ROIC(3y)N/A
ROIC(5y)N/A
PRTA Yearly ROA, ROE, ROICPRTA Yearly ROA, ROE, ROICYearly ROA, ROE, ROIC 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 0 -20 -40 -60

1.3 Margins

The Profit Margin and Operating Margin and Gross Margin are not available for PRTA so they could not be analyzed.
Industry RankSector Rank
OM N/A
PM (TTM) N/A
GM N/A
OM growth 3YN/A
OM growth 5YN/A
PM growth 3YN/A
PM growth 5YN/A
GM growth 3YN/A
GM growth 5YN/A
PRTA Yearly Profit, Operating, Gross MarginsPRTA Yearly Profit, Operating, Gross MarginsYearly Profit, Operating, Gross Margins 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 0 -5K -10K -15K

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7

2. Health

2.1 Basic Checks

PRTA does not have a ROIC to compare to the WACC, probably because it is not profitable.
PRTA has more shares outstanding than it did 1 year ago.
The number of shares outstanding for PRTA has been increased compared to 5 years ago.
There is no outstanding debt for PRTA. This means it has a Debt/Equity and Debt/FCF ratio of 0 and it is amongst the best of the sector and industry.
PRTA Yearly Shares OutstandingPRTA Yearly Shares OutstandingYearly Shares Outstanding 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 10M 20M 30M 40M 50M
PRTA Yearly Total Debt VS Total AssetsPRTA Yearly Total Debt VS Total AssetsYearly Total Debt VS Total Assets 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 200M 400M 600M

2.2 Solvency

Based on the Altman-Z score of -0.74, we must say that PRTA is in the distress zone and has some risk of bankruptcy.
The Altman-Z score of PRTA (-0.74) is comparable to the rest of the industry.
There is no outstanding debt for PRTA. This means it has a Debt/Equity and Debt/FCF ratio of 0 and it is amongst the best of the sector and industry.
Industry RankSector Rank
Debt/Equity 0
Debt/FCF N/A
Altman-Z -0.74
ROIC/WACCN/A
WACC7.51%
PRTA Yearly LT Debt VS Equity VS FCFPRTA Yearly LT Debt VS Equity VS FCFYearly LT Debt VS Equity VS FCF 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 0 200M 400M 600M

2.3 Liquidity

PRTA has a Current Ratio of 6.61. This indicates that PRTA is financially healthy and has no problem in meeting its short term obligations.
PRTA has a better Current ratio (6.61) than 67.11% of its industry peers.
A Quick Ratio of 6.61 indicates that PRTA has no problem at all paying its short term obligations.
PRTA's Quick ratio of 6.61 is fine compared to the rest of the industry. PRTA outperforms 67.86% of its industry peers.
Industry RankSector Rank
Current Ratio 6.61
Quick Ratio 6.61
PRTA Yearly Current Assets VS Current LiabilitesPRTA Yearly Current Assets VS Current LiabilitesYearly Current Assets VS Current Liabilites 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 200M 400M 600M

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3

3. Growth

3.1 Past

The earnings per share for PRTA have decreased strongly by -85.89% in the last year.
The Revenue for PRTA has decreased by -91.16% in the past year. This is quite bad
Measured over the past years, PRTA shows a very strong growth in Revenue. The Revenue has been growing by 178.96% on average per year.
EPS 1Y (TTM)-85.89%
EPS 3YN/A
EPS 5YN/A
EPS Q2Q%38.18%
Revenue 1Y (TTM)-91.16%
Revenue growth 3Y-12.33%
Revenue growth 5Y178.96%
Sales Q2Q%148.97%

3.2 Future

PRTA is expected to show a small growth in Earnings Per Share. In the coming years, the EPS will grow by 6.47% yearly.
PRTA is expected to show a decrease in Revenue. In the coming years, the Revenue will decrease by -6.53% yearly.
EPS Next Y-109.62%
EPS Next 2Y36.21%
EPS Next 3Y17.59%
EPS Next 5Y6.47%
Revenue Next Year-92.13%
Revenue Next 2Y-14.95%
Revenue Next 3Y-37.69%
Revenue Next 5Y-6.53%

3.3 Evolution

The Revenue growth rate is decreasing: in the next years the growth will be less than in the last years.
PRTA Yearly Revenue VS EstimatesPRTA Yearly Revenue VS EstimatesYearly Revenue VS Estimates 2014 2016 2018 2020 2022 2024 2026 2028 2030 2032 100M 200M 300M
PRTA Yearly EPS VS EstimatesPRTA Yearly EPS VS EstimatesYearly EPS VS Estimates 2014 2016 2018 2020 2022 2024 2026 2028 2030 2032 0 2 -2 -4

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0

4. Valuation

4.1 Price/Earnings Ratio

The Price/Earnings Ratio is negative for PRTA. In the last year negative earnings were reported.
Besides the negative Price/Earnings Ratio, also the Forward Price/Earnings Ratio is negative for PRTA. No positive earnings are expected for the next year.
Industry RankSector Rank
PE N/A
Fwd PE N/A
PRTA Price Earnings VS Forward Price EarningsPRTA Price Earnings VS Forward Price Earnings ChartPrice Earnings - Forward Price Earnings PE FPE 0 20 -20 40 60

4.2 Price Multiples

Industry RankSector Rank
P/FCF N/A
EV/EBITDA N/A
PRTA Per share dataPRTA EPS, Sales, OCF, FCF, BookValue per sharePer Share Data Per Share 0 2 -2 4 -4

4.3 Compensation for Growth

PRTA's earnings are expected to grow with 17.59% in the coming years. This may justify a more expensive valuation.
PEG (NY)N/A
PEG (5Y)N/A
EPS Next 2Y36.21%
EPS Next 3Y17.59%

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0

5. Dividend

5.1 Amount

No dividends for PRTA!.
Industry RankSector Rank
Dividend Yield 0%

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PROTHENA CORP PLC

NASDAQ:PRTA (12/15/2025, 8:00:02 PM)

After market: 9.97 0 (0%)

9.97

-0.39 (-3.76%)

Chartmill FA Rating
GICS SectorHealth Care
GICS IndustryGroupPharmaceuticals, Biotechnology & Life Sciences
GICS IndustryBiotechnology
Earnings (Last)11-06 2025-11-06/amc
Earnings (Next)02-18 2026-02-18/amc
Inst Owners79.88%
Inst Owner Change0.75%
Ins Owners19.38%
Ins Owner Change45.8%
Market Cap536.69M
Revenue(TTM)11.79M
Net Income(TTM)-280.46M
Analysts75.38
Price Target20.74 (108.02%)
Short Float %10.73%
Short Ratio7.22
Dividend
Industry RankSector Rank
Dividend Yield 0%
Yearly DividendN/A
Dividend Growth(5Y)N/A
DPN/A
Div Incr Years0
Div Non Decr Years0
Ex-DateN/A
Surprises & Revisions
EPS beat(2)1
Avg EPS beat(2)-12.94%
Min EPS beat(2)-28.86%
Max EPS beat(2)2.98%
EPS beat(4)1
Avg EPS beat(4)-10.08%
Min EPS beat(4)-28.86%
Max EPS beat(4)2.98%
EPS beat(8)3
Avg EPS beat(8)21.35%
EPS beat(12)6
Avg EPS beat(12)43.16%
EPS beat(16)6
Avg EPS beat(16)21.31%
Revenue beat(2)0
Avg Revenue beat(2)-41.76%
Min Revenue beat(2)-64.33%
Max Revenue beat(2)-19.2%
Revenue beat(4)0
Avg Revenue beat(4)-52.91%
Min Revenue beat(4)-72.37%
Max Revenue beat(4)-19.2%
Revenue beat(8)1
Avg Revenue beat(8)86.12%
Revenue beat(12)3
Avg Revenue beat(12)64.36%
Revenue beat(16)3
Avg Revenue beat(16)25.69%
PT rev (1m)23.23%
PT rev (3m)69.44%
EPS NQ rev (1m)-7.53%
EPS NQ rev (3m)-7.51%
EPS NY rev (1m)-2.21%
EPS NY rev (3m)-17.29%
Revenue NQ rev (1m)-79.42%
Revenue NQ rev (3m)-79.42%
Revenue NY rev (1m)-46.36%
Revenue NY rev (3m)-46.36%
Valuation
Industry RankSector Rank
PE N/A
Fwd PE N/A
P/S 45.54
P/FCF N/A
P/OCF N/A
P/B 1.82
P/tB 1.82
EV/EBITDA N/A
EPS(TTM)-4.61
EYN/A
EPS(NY)-0.33
Fwd EYN/A
FCF(TTM)-3.5
FCFYN/A
OCF(TTM)-3.49
OCFYN/A
SpS0.22
BVpS5.48
TBVpS5.48
PEG (NY)N/A
PEG (5Y)N/A
Graham NumberN/A
Profitability
Industry RankSector Rank
ROA -79.53%
ROE -95.07%
ROCE N/A
ROIC N/A
ROICexc N/A
ROICexgc N/A
OM N/A
PM (TTM) N/A
GM N/A
FCFM N/A
ROA(3y)-19.63%
ROA(5y)-16.25%
ROE(3y)-23.37%
ROE(5y)-23.22%
ROIC(3y)N/A
ROIC(5y)N/A
ROICexc(3y)N/A
ROICexc(5y)N/A
ROICexgc(3y)N/A
ROICexgc(5y)N/A
ROCE(3y)N/A
ROCE(5y)N/A
ROICexgc growth 3YN/A
ROICexgc growth 5YN/A
ROICexc growth 3YN/A
ROICexc growth 5YN/A
OM growth 3YN/A
OM growth 5YN/A
PM growth 3YN/A
PM growth 5YN/A
GM growth 3YN/A
GM growth 5YN/A
F-Score3
Asset Turnover0.03
Health
Industry RankSector Rank
Debt/Equity 0
Debt/FCF N/A
Debt/EBITDA N/A
Cap/Depr 20.16%
Cap/Sales 1.54%
Interest Coverage N/A
Cash Conversion N/A
Profit Quality N/A
Current Ratio 6.61
Quick Ratio 6.61
Altman-Z -0.74
F-Score3
WACC7.51%
ROIC/WACCN/A
Cap/Depr(3y)132.78%
Cap/Depr(5y)92.67%
Cap/Sales(3y)1.38%
Cap/Sales(5y)5.33%
Profit Quality(3y)N/A
Profit Quality(5y)N/A
High Growth Momentum
Growth
EPS 1Y (TTM)-85.89%
EPS 3YN/A
EPS 5YN/A
EPS Q2Q%38.18%
EPS Next Y-109.62%
EPS Next 2Y36.21%
EPS Next 3Y17.59%
EPS Next 5Y6.47%
Revenue 1Y (TTM)-91.16%
Revenue growth 3Y-12.33%
Revenue growth 5Y178.96%
Sales Q2Q%148.97%
Revenue Next Year-92.13%
Revenue Next 2Y-14.95%
Revenue Next 3Y-37.69%
Revenue Next 5Y-6.53%
EBIT growth 1Y-32.15%
EBIT growth 3YN/A
EBIT growth 5YN/A
EBIT Next Year100%
EBIT Next 3YN/A
EBIT Next 5YN/A
FCF growth 1Y-110.54%
FCF growth 3YN/A
FCF growth 5YN/A
OCF growth 1Y-113.92%
OCF growth 3YN/A
OCF growth 5YN/A

PROTHENA CORP PLC / PRTA FAQ

What is the ChartMill fundamental rating of PROTHENA CORP PLC (PRTA) stock?

ChartMill assigns a fundamental rating of 3 / 10 to PRTA.


Can you provide the valuation status for PROTHENA CORP PLC?

ChartMill assigns a valuation rating of 0 / 10 to PROTHENA CORP PLC (PRTA). This can be considered as Overvalued.


What is the profitability of PRTA stock?

PROTHENA CORP PLC (PRTA) has a profitability rating of 0 / 10.


What is the financial health of PROTHENA CORP PLC (PRTA) stock?

The financial health rating of PROTHENA CORP PLC (PRTA) is 7 / 10.