Which has grown faster, PRTA or SRTA?

Over the past five years, PRTA grew revenue faster — PRTA at a 62.57% CAGR versus SRTA at 46.05%.

Is PRTA or SRTA more profitable?

SRTA runs the higher net margin — PRTA at -80.67% versus SRTA at 15.71%.

How have PRTA and SRTA total returns compared?

Over the past 5 years, PRTA delivered -35.08% and SRTA delivered -13.77% annualized total return. Past performance doesn't predict future results.

Prothena Corporation plc (PRTA) vs Strata Critical Medical, Inc. (SRTA)

A side-by-side comparison of Prothena Corporation plc and Strata Critical Medical, Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of October 6, 2026. Differences are shown without an overall score or investment verdict.

PRTA

Prothena Corporation plc

$412M

$7.86HealthcareDelayed quote: Oct 6, 2026, 1:49 PM EDT

SRTA

Strata Critical Medical, Inc.

$412M

$4.77HealthcareDelayed quote: Oct 6, 2026, 1:50 PM EDT

Total return — PRTA vs SRTA

growth of $100 · dividends reinvested · last 7y

PRTA -11.6% (-1.7%/yr)SRTA -50.7% (-9.6%/yr)PRTA compounded faster over this window

PRTA SRTA

PRTA vs SRTA: by the numbers

•SRTA is the larger company ($412M vs $412M market cap).
•SRTA is profitable (15.71% net margin) while PRTA runs a net loss (-80.67%).
•PRTA grew revenue faster over the past five years (62.57% vs 46.05% CAGR).

Metrics side by side

Valuation

Metric	PRTA	SRTA
P/E ratio	N/A	9.57
Forward P/E	71.48	N/A
P/S ratio	7.55	1.61
P/B ratio	1.43	1.48

Profitability

Metric	PRTA	SRTA
Gross margin	61.77%	20.56%
Operating margin	-1905.82%	-7.97%
Net margin	-80.67%	15.71%
ROE	-15.33%	14.40%
ROIC	-21.36%	-7.11%

Growth (annualized)

Metric	PRTA	SRTA
Revenue CAGR (5Y)	62.57%	46.05%
Total return CAGR (5Y)	-35.08%	-13.77%

Frequently asked

Which has grown faster, PRTA or SRTA?: Over the past five years, PRTA grew revenue faster — PRTA at a 62.57% CAGR versus SRTA at 46.05%.
Is PRTA or SRTA more profitable?: SRTA runs the higher net margin — PRTA at -80.67% versus SRTA at 15.71%.
How have PRTA and SRTA total returns compared?: Over the past 5 years, PRTA delivered -35.08% and SRTA delivered -13.77% annualized total return. Past performance doesn't predict future results.

Go deeper

Full PRTA analysis Full SRTA analysis Interactive comparison tool

Dig into the metrics

Strata Critical Medical P/E ratio Prothena ROE Strata Critical Medical ROE Prothena operating margin Strata Critical Medical operating margin Prothena revenue growth Strata Critical Medical revenue growth Prothena free cash flow Strata Critical Medical free cash flow

Prothena & Strata Critical Medical appear in these rankings

Fastest Revenue Growth Stocks Lowest P/E Ratio Stocks

Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified October 6, 2026.