Altimmune (ALT) - Shares outstanding

Number of shares outstanding as of July 2026 : 124,461,818

According to Altimmune's latest financial reports and stock price the company's current number of shares outstanding is 124,461,818. At the end of 2026 the company had 124,461,818 shares outstanding. The number of outstanding shares is usually impacted by stock plits and shares buy back.

Shares outstanding history for Altimmune from 2018 to 2026

Shares Outstanding at the end of each year

Year	Shares Outstanding	Change
2026	0.12 B	23.7%
2025	0.10 B	41.19%
2024	71.26 M	32.87%
2023	53.63 M	7.21%
2022	50.02 M	19.95%
2021	41.7 M	26.16%
2020	33.05 M	123.83%
2019	14.76 M	1017.77%
2018	1.32 M

Shares Outstanding for similar companies or competitors

Company	Shares Outstanding	differencediff.	Country
OPKO Health OPK	758,876,415	509.73%	🇺🇸 USA
Onconova Therapeutics ONTX	21,043,458	-83.09%	🇺🇸 USA

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 Altimmune (ALT)

Number of shares outstanding as of July 2026 : 124,461,818