Prothena (PRTA) - basic shares outstanding

Number of shares outstanding as of September 2024 : 53,767,000

According to Prothena's latest financial reports and stock price the company's current number of shares outstanding is 53,767,000. At the end of 2024 the company had 53,767,000 shares outstanding. The number of outstanding shares is usually impacted by stock plits and shares buy back.

Shares outstanding history for Prothena from 2012 to 2024

Shares Outstanding at the end of each year

Year	Shares Outstanding	Change
2024	53.76 M	0.18%
2023	53.66 M	9.62%
2022	48.96 M	5.02%
2021	46.61 M	16.78%
2020	39.92 M	0.06%
2019	39.89 M	0.08%
2018	39.86 M	3.66%
2017	38.45 M	11.13%
2016	34.6 M	9.47%
2015	31.61 M	15.44%
2014	27.38 M	28%
2013	21.39 M	43.72%
2012	14.88 M

Shares Outstanding for similar companies or competitors

Company	Shares Outstanding	differencediff.	Country
Alkermes ALKS	168,321,000	213.06%	🇮🇪 Ireland
Alnylam Pharmaceuticals ALNY	126,733,000	135.71%	🇺🇸 USA
Amarin Corporation AMRN	410,851,000	664.13%	🇮🇪 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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Number of shares outstanding for Prothena (PRTA)

Number of shares outstanding as of September 2024 : 53,767,000