Amphastar Pharmaceuticals - 11 Year Stock Price History | AMPH

The latest closing stock price for Amphastar Pharmaceuticals as of March 31, 2025 is 28.99.

  • An investor who bought $1,000 worth of Amphastar Pharmaceuticals stock at the IPO in 2014 would have $2,313 today, roughly 2 times their original investment - a 11.51% compound annual growth rate over 11 years.
  • The all-time high Amphastar Pharmaceuticals stock closing price was 65.00 on August 08, 2023.
  • The Amphastar Pharmaceuticals 52-week high stock price is 53.95, which is 86.1% above the current share price.
  • The Amphastar Pharmaceuticals 52-week low stock price is 25.89, which is 10.7% below the current share price.
  • The average Amphastar Pharmaceuticals stock price for the last 52 weeks is 40.87.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.

Amphastar Pharmaceuticals - 11 Year Stock Price History | AMPH

  • An investor who bought $1,000 worth of Amphastar Pharmaceuticals stock at the IPO in 2014 would have $2,313 today, roughly 2 times their original investment - a 11.51% compound annual growth rate over 11 years.
  • The all-time high Amphastar Pharmaceuticals stock closing price was 65.00 on August 08, 2023.
  • The Amphastar Pharmaceuticals 52-week high stock price is 53.95, which is 86.1% above the current share price.
  • The Amphastar Pharmaceuticals 52-week low stock price is 25.89, which is 10.7% below the current share price.
  • The average Amphastar Pharmaceuticals stock price for the last 52 weeks is 40.87.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.