Amphastar Pharmaceuticals (AMPH)

Number of shares outstanding as of May 2026 : 45,907,000

According to Amphastar Pharmaceuticals's latest financial reports and stock price the company's current number of shares outstanding is 45,907,000. At the end of 2025 the company had 45,907,000 shares outstanding. The number of outstanding shares is usually impacted by stock plits and shares buy back.

Shares outstanding history for Amphastar Pharmaceuticals from 2013 to 2025

Shares Outstanding at the end of each year

Year	Shares Outstanding	Change
2025	45.9 M	-4.31%
2024	47.97 M	0.04%
2023	47.95 M	-0.71%
2022	48.29 M	0.97%
2021	47.83 M	0.72%
2020	47.49 M	1.4%
2019	46.84 M	1.24%
2018	46.26 M	0.08%
2017	46.23 M	0.28%
2016	46.1 M	1.75%
2015	45.31 M	1.48%
2014	44.64 M	458.1%
2013	8 M

Shares Outstanding for similar companies or competitors

Company	Shares Outstanding	differencediff.	Country
Tonix Pharmaceuticals TNXP	11,798,945	-74.30%	🇺🇸 USA
SCYNEXIS SCYX	49,898,892	8.70%	🇺🇸 USA
Marinus Pharmaceuticals MRNS	57,229,229	24.66%	🇺🇸 USA
Agile Therapeutics AGRX	6,856,229	-85.06%	🇺🇸 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 Amphastar Pharmaceuticals (AMPH)

Number of shares outstanding as of May 2026 : 45,907,000