Prothena (PRTA) - Stock price history

Stock price history of Prothena from 2012 to 2025

Annual Stock Price Performance

Year	Performance
2025	-24.51%
2024	-64.06%
2023	-32.07%
2022	22.41%
2021	301.63%
2020	-23.16%
2019	50.76%
2018	-72.75%
2017	-24.70%
2016	-20.94%
2015	234.69%
2014	-26.12%
2013	278.86%
2012	0.00%

Stock price for similar companies or competitors

Company	Stock price	Change 1d%	Country
Alkermes ALKS	$28.44	-3.30%	🇮🇪 Ireland
Alnylam Pharmaceuticals ALNY	$415.21	-3.44%	🇺🇸 USA
Amarin Corporation AMRN	$14.12	-5.36%	🇮🇪 Ireland

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Stock price history for Prothena (PRTA)