Prothena (PRTA) - P/S ratio

P/S ratio as of December 2025 (TTM): 47.6

According to Prothena's latest financial reports and stock price the company's current price-to-sales ratio (TTM) is 1.90. At the end of 2025 the company had a P/S ratio of 43.0.

P/S ratio history for Prothena from 2013 to 2025

PS ratio at the end of each year

Year	P/S ratio	Change
2025	43.0	613.03%
2024	6.03	-71.76%
2023	21.3	-63.01%
2022	57.7	402.84%
2021	11.5	-97.96%
2020	562	-27.56%
2019	776	80.47%
2018	430	720.86%
2017	52.4	-96.74%
2016	> 1000	19.52%
2015	> 1000	11933.6%
2014	11.2	-98.7%
2013	857

P/S ratio for similar companies or competitors

Company	P/S ratio	P/S ratio differencediff.	Country
Alkermes ALKS	3.14	-93.41%	🇮🇪 Ireland
Alnylam Pharmaceuticals ALNY	17.1	-64.00%	🇺🇸 USA
Amarin Corporation AMRN	1.31	-97.25%	🇮🇪 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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P/S ratio for Prothena (PRTA)

P/S ratio as of December 2025 (TTM): 47.6