AMPH
Amphastar Pharmaceuticals
PE ratio, current and historical analysis
- Stocks
- Healthcare
- NASDAQ: AMPH
- PE Ratio
The P/E ratio for Amphastar Pharmaceuticals stock stands at 10.6 as of Jun 3, 2026. This is calculated based on the current EPS of $1.71 and the stock price of $18.12 per share. A decrease of 2.9% has been recorded in the PE ratio compared to the average of 10.9 of the past four quarters.
AMPH PE ratio history
Over the last ten years, the average PE ratio of Amphastar Pharmaceuticals has been 83.32. The current 10.6 price-to-earnings ratio is 87% less than the historical average. In the past ten years, AMPH's PE ratio reached its highest point in the Dec 2020 quarter at 670.33, with a price of $20.11 and an EPS of $0.03. The Jun 2025 quarter saw the lowest point at 8.17, with a price of $22.96 and an EPS of $2.81.
Amphastar Pharmaceuticals PE ratio by year
Maximum annual increase: 3,513.64% in 2020
Maximum annual decrease: -97.33% in 2021
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 12.75 | 12.93% | $26.78 | $2.1 |
| 2024 | 11.29 | -47.97% | $37.13 | $3.29 |
| 2023 | 21.7 | 45.64% | $61.85 | $2.85 |
| 2022 | 14.9 | -16.85% | $28.02 | $1.88 |
| 2021 | 17.92 | -97.33% | $23.29 | $1.3 |
| 2020 | 670.33 | 3,513.64% | $20.11 | $0.03 |
| 2019 | 18.55 | N/A | $19.29 | $1.04 |
| 2018 | N/A | N/A | $19.9 | -$0.12 |
| 2017 | 240.5 | 187.23% | $19.24 | $0.08 |
| 2016 | 83.73 | N/A | $18.42 | $0.22 |
| 2015 | N/A | N/A | $14.23 | -$0.06 |
| 2014 | N/A | N/A | $11.61 | -$0.25 |
| 2013 | N/A | N/A | N/A | $0.31 |
| 2012 | N/A | N/A | N/A | $0.47 |
| 2011 | N/A | N/A | N/A | $0.2 |
Amphastar Pharmaceuticals PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Mar 2026 | 11.46 | -10.12% | $19.59 | $1.71 |
| Dec 2025 | 12.75 | 12.93% | $26.78 | $2.1 |
| Sep 2025 | 11.29 | 38.19% | $26.65 | $2.36 |
| Jun 2025 | 8.17 | -17.72% | $22.96 | $2.81 |
| Mar 2025 | 9.93 | -12.05% | $28.99 | $2.92 |
| Dec 2024 | 11.29 | -24.38% | $37.13 | $3.29 |
| Sep 2024 | 14.93 | 28.04% | $48.53 | $3.25 |
| Jun 2024 | 11.66 | -15.01% | $40 | $3.43 |
| Mar 2024 | 13.72 | -36.77% | $43.91 | $3.2 |
| Dec 2023 | 21.7 | 31.67% | $61.85 | $2.85 |
| Sep 2023 | 16.48 | -39.79% | $45.99 | $2.79 |
| Jun 2023 | 27.37 | 39.43% | $57.47 | $2.1 |
| Mar 2023 | 19.63 | 31.74% | $37.5 | $1.91 |
| Dec 2022 | 14.9 | -16.2% | $28.02 | $1.88 |
| Sep 2022 | 17.78 | -3.94% | $28.1 | $1.58 |
AMPH Price vs fair value
AMPH average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
Currently, AMPH's PE ratio is lower than the 3, 5 and 10-year averages.
PE comparison
Amphastar Pharmaceuticals's P/E of 10.6 is below the Healthcare sector and the industry average. Looking at its Healthcare sector average of 23.02, Amphastar Pharmaceuticals's P/E is 54% lower.
AMPH PE vs peers
| Stock name | PE ratio | Market cap |
|---|---|---|
| AMPH Amphastar Pharmaceuticals Inc | 10.99 | $828.29M |
| SCYX Scynexis Inc | N/A | $48.66M |
Frequently asked questions
What is Amphastar Pharmaceuticals's PE ratio?
The price to earnings ratio for AMPH stock is 10.6 as of Jun 3, 2026.
What is the 3-year average PE ratio for Amphastar Pharmaceuticals (AMPH)?
The average PE ratio for AMPH stock over the past 3 years is 14.23.
What is the 5-year average PE ratio for Amphastar Pharmaceuticals (AMPH)?
The average PE ratio for AMPH stock over the past 5 years is 19.87.
What is the highest PE ratio for AMPH?
The highest quarterly PE ratio in the last ten years has been 670.33 and it was in the Dec 2020 quarter.
How does the current PE ratio for AMPH compare to its historical average?
The current price to earnings ratio of AMPH is 87% lower than the 10-year historical average.
How is AMPH's PE ratio calculated (Amphastar Pharmaceuticals PE ratio formula)?
The P/E ratio is calculated by dividing the latest price of a stock by its trailing twelve months EPS. As of today (Jun 3, 2026), Amphastar Pharmaceuticals's stock price is $18.12. The earnings per share for the trailing twelve months (TTM) ending Mar 2026 is $1.71. Therefore, Amphastar Pharmaceuticals's price to earnings ratio for today is 10.6. PE RATIO(10.6) = STOCK PRICE($18.12) / TTM EPS($1.71)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.