Prothena Corporation plc has grown revenue −1.8% a year over three years and −2.1% a year over five. Revenue growth, 3-year annual rate: −1.8% (Biotechnology median +17%). Revenue growth, 5-year rate: −2.1%, growth has picked up over the last three years. Years of annual history on file: 15, FY2011 to FY2025, as filed.

PRTAProthena Corporation plc

Healthcare

$8.61-15% 1Y

$8.61

$7.9152 weeks$11.51

Is it growing?

Mixed

Neither accelerating nor breaking down: revenue growing +427% year on year, but operating margin narrowing (−26200.5 points).

1 good, 1 to watch, 1 without data

Revenue trend+427% in a year

Trailing-twelve-month revenue vs a year earlier, from the company's own filings. Five-year pace: −2% a year.

Margin direction−26200.5 points operating

Trailing-twelve-month operating margin, -29737.3% now against -3536.8% a year earlier.

All from SEC EDGAR, as of Jun 30, 2026.

Where this answer is blind. These are trailing numbers from the filings, not forecasts: an acquisition or a one-off year can flatter them, so check the quarters.

Is PRTA growing?

Prothena Corporation plc has grown revenue −1.8% a year over three years and −2.1% a year over five.

−1.8%

Revenue growth, 3-year annual rate · Biotechnology median +17% · shrinking · compounded from trailing twelve-month revenue

Revenue growth, 5-year rate: −2.1%
Revenue growth, 5-year rate · −1.8% over three · growth has picked up over the last three years
Years of annual history on file: 15
Years of annual history on file · FY2011 to FY2025, as filed

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