PRTA vs SEI

Comparison between Prothena Corporation plc (PRTA, Company) and Solaris Energy Infrastructure Inc - Class A (SEI, Company).

PRTA is from the Healthcare sector, while SEI is from the Energy sector.

5-Year PerformanceSEI has outperformed PRTA, delivering a return of +60.6% compared to -29.4%

PRTA vs SEI - Performance Comparison

Log

Key Characteristics

Financial metrics and valuation ratios

Metric	PRTA(COMPANY)	SEI(COMPANY)
Market Cap	$474M	$473M
Max Drawdown	94.19%	80.61%
Sharpe Ratio	1.09	1.75
5Y Beta	0.94	2.12
Industry	Biotechnology	Oil & Gas Equipment & Services
P/E Ratio	-3.19	0.11
Forward P/E	10.63	384.62
PEG Ratio	-0.09	0.94
Dividend Yield	N/A	0.63%
5Y Dividends CAGR	N/A	13.75%
5Y EPS CAGR	-1.54%	N/A
Debt to Equity	0.00%	73.31%
Free Cash Flow Yield	-17.16%	-82.95%
P/S Ratio	N/A	6.05
P/B Ratio	N/A	4.68

Market Cap

Winner

PRTA

$474M

SEI

$473M

Max Drawdown

PRTA

94.19%

Winner

SEI

80.61%

Sharpe Ratio

PRTA

1.09

Winner

SEI

1.75

5Y Beta

Winner

PRTA

0.94

SEI

2.12

Industry

PRTA

Biotechnology

SEI

Oil & Gas Equipment & Services

P/E Ratio

Winner

PRTA

-3.19

SEI

0.11

Forward P/E

Winner

PRTA

10.63

SEI

384.62

PEG Ratio

Winner

PRTA

-0.09

SEI

0.94

Dividend Yield

PRTA

N/A

SEI

0.63%

5Y Dividends CAGR

PRTA

N/A

SEI

13.75%

5Y EPS CAGR

PRTA

-1.54%

SEI

N/A

Debt to Equity

Winner

PRTA

0.00%

SEI

73.31%

Free Cash Flow Yield

Winner

PRTA

-17.16%

SEI

-82.95%

P/S Ratio

PRTA

N/A

SEI

6.05

P/B Ratio

PRTA

N/A

SEI

4.68

PRTA vs SEI - Historical Returns

Returns include dividend reinvestment.

Period	PRTA	SEI
1 month	-6.88%	+15.10%
3 months	+3.96%	+21.09%
6 months	-4.80%	+93.22%
1 year	+55.30%	+188.72%
5 years(CAGR)	-29.43%	+60.58%
10 years(CAGR)	-13.89%	+28.32%
Max(CAGR)	+1.61%	+28.32%

PRTA

-6.88%

Winner

SEI

+15.10%

PRTA

+3.96%

Winner

SEI

+21.09%

PRTA

-4.80%

Winner

SEI

+93.22%

PRTA

+55.30%

Winner

SEI

+188.72%

5Y(CAGR)

PRTA

-29.43%

Winner

SEI

+60.58%

10Y(CAGR)

PRTA

-13.89%

Winner

SEI

+28.32%

Max(CAGR)

PRTA

+1.61%

Winner

SEI

+28.32%

PRTA vs SEI - Annual Returns (2012 - 2026)

Returns include dividend reinvestment.

Year	PRTA	SEI
2026	-2.93%	+65.54%
2025	-30.14%	+58.55%
2024	-64.06%	+276.93%
2023	-32.07%	-9.72%
2022	+22.41%	+47.14%
2021	+301.63%	-17.76%
2020	-23.16%	-38.00%
2019	+50.76%	+14.17%
2018	-72.75%	-45.50%
2017	-24.70%	+85.37%
2016	-20.94%	N/A
2015	+234.69%	N/A
2014	-26.12%	N/A
2013	+278.86%	N/A
2012	+1.81%	N/A

PRTA vs SEI Drawdown Comparison

The maximum drawdown for PRTA was -94.19%, occurring on May 27, 2025. This drawdown has not yet recovered.

The maximum drawdown for SEI was -79.48%, occurring on Mar 23, 2020. Recovery took 1723 trading sessions.

The current PRTA drawdown is -88.68%.

Rank	PRTA	SEI
#1	-94.19% Sep 23, 2021 - May 27, 2025	-79.48% Jan 5, 2018 - Nov 11, 2024
#2	-90.85% Nov 27, 2015 - Sep 10, 2021	-55.38% Feb 21, 2025 - Sep 18, 2025
#3	-64.27% Mar 20, 2014 - Jun 17, 2015	-31.39% Jan 24, 2025 - Feb 21, 2025
#4	-36.96% Jul 28, 2015 - Nov 18, 2015	-26.42% Dec 5, 2025 - Jan 15, 2026
#5	-20.33% Dec 31, 2012 - Apr 9, 2013	-24.90% Oct 15, 2025 - Dec 4, 2025
#6	-18.45% Jun 20, 2013 - Jul 12, 2013	-22.93% Mar 18, 2026 - Apr 23, 2026
#7	-17.61% Jan 30, 2014 - Feb 25, 2014	-19.11% Jan 21, 2026 - Mar 16, 2026
#8	-15.12% Dec 16, 2013 - Jan 29, 2014	-18.79% Oct 5, 2017 - Nov 7, 2017
#9	-14.72% Oct 2, 2013 - Oct 25, 2013	-17.19% May 17, 2017 - Jul 14, 2017
#10	-11.68% May 28, 2013 - Jun 7, 2013	-16.68% Dec 11, 2024 - Jan 22, 2025
#11	-10.76% Aug 2, 2013 - Aug 22, 2013	-16.28% Nov 7, 2017 - Dec 12, 2017
#12	-10.14% Jun 22, 2015 - Jul 14, 2015	-14.65% Jul 19, 2017 - Aug 31, 2017
#13	-7.65% Mar 12, 2014 - Mar 19, 2014	-13.01% May 15, 2026 - Jun 17, 2026
#14	-6.94% Aug 29, 2013 - Oct 2, 2013	-9.05% Dec 5, 2024 - Dec 10, 2024
#15	-6.73% Jul 22, 2015 - Jul 28, 2015	-8.32% Sep 6, 2017 - Sep 12, 2017

Correlation

Correlation between PRTA and SEI is -0.36 which considered as a weak negative correlation - the stocks show a slight tendency to move in opposite directions.

-0.36

-101