On this page we presented the AMPH earnings surprises information for Amphastar Pharma, comparing the expected earnings versus the actual earnings quarter by quarter, with the resulting positive or negative percentage surprise. Any self directed investor doing their due diligence on AMPH (or any other given stock) can benefit from researching all of the Amphastar Pharma past earnings going backwards in time, including how often the company beat or missed the market's expectations. To help you with this Amphastar Pharma earnings surprise research, on this page we presented each quarter's resulting numbers for easy comparison. Studying these numbers can help an investor by providing important context with which to think about AMPH's next earnings report. In your continued research on Amphastar Pharma we hope you will be sure to check out the further links included for revenue and earnings history as well as next earnings dates for AMPH. Thanks for visiting, and the next time you need to research AMPH earnings surprises or those of another stock, we hope you'll think of our site as your go-to earnings surprises research resource of choice.