Prothena (PRTA) - Market capitalization

Market cap: HK$6.61 Billion

As of March 2025 Prothena has a market cap of HK$6.61 Billion. This makes Prothena the world's 5815th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Prothena from 2012 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	HK$6.61 B	4.62%
2024	HK$6.32 B	-58.48%
2023	HK$15.23 B	-37.33%
2022	HK$24.30 B	35.41%
2021	HK$17.94 B	382.88%
2020	HK$3.71 B	-24.44%
2019	HK$4.91 B	52.98%
2018	HK$3.21 B	-71.45%
2017	HK$11.26 B	-14.4%
2016	HK$13.15 B	-21.5%
2015	HK$16.75 B	279.98%
2014	HK$4.41 B	-1.88%
2013	HK$4.49 B	347.47%
2012	HK$1.00 B

End of Day market cap according to different sources

On Feb 28th, 2025 the market cap of Prothena was reported to be:

HK$6.61 Billion

by Nasdaq

HK$6.61 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Alkermes ALKS	HK$43.42 B	556.22%	🇮🇪 Ireland
Alnylam Pharmaceuticals ALNY	HK$248.45 B	3,654.90%	🇺🇸 USA
Amarin Corporation AMRN	HK$1.73 B	-73.80%	🇮🇪 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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Market capitalization of Prothena (PRTA)

Market cap: HK$6.61 Billion