Amphastar Pharmaceuticals Stock Price History
NASDAQ: AMPHHealth CareBiotechnology: Pharmaceutical PreparationsUSD
26.62+0.81 (+3.14%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
AMPH price history at a glance
The price history for Amphastar Pharmaceuticals (AMPH) on this page begins on June 23, 2014, when the stock closed at $10.50; it most recently closed at $26.62 on October 5, 2026. The highest price in this record is $67.66, reached on August 7, 2023; the latest close is 60.7% below that peak. Across the 11 complete calendar years in the table, AMPH finished higher in 8 and lower in 3. Its best year was 2023 (+120.7%) and its worst was 2024 (-41.3%).
Over roughly 12 years the share price changed +153.5%, a 7.9% compound annual price return (excluding dividends). In the last 12 months alone, AMPH has gained 6.6%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2014
- $67.66
- Date of high
- Aug 7, 2023
- Low since 2014
- $6.67
- Date of low
- Jun 23, 2014
- 52-week high
- $29.52
- 52-week low
- $16.65
- IPO year
- 2014
- Last close
- $26.62
AMPH returns
1 week
+4.68%
1 month
+15.54%
3 months
+42.20%
6 months
+30.68%
Year to date
-0.60%
1 year
+6.61%
3 years
-41.83%
5 years
+39.30%
AMPH price return, excluding dividends.
AMPH annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 26.62 | +0.60% |
| 2025 | 26.46 | -27.11% |
| 2024 | 36.30 | -41.31% |
| 2023 | 61.85 | +120.74% |
| 2022 | 28.02 | +20.31% |
| 2021 | 23.29 | +15.81% |
| 2020 | 20.11 | +6.46% |
| 2019 | 18.89 | -8.43% |
| 2018 | 20.63 | +7.22% |
| 2017 | 19.24 | +4.45% |
| 2016 | 18.42 | +29.44% |
| 2015 | 14.23 | +20.19% |
| 2014* | 11.84 | +12.76% |
* Partial year: the record begins after the start of 2014; return measured from the first available close.
2026 return is year to date.
AMPH daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 25.82 | 26.79 | 25.65 | 26.62 | +3.14% | |
| 25.39 | 26.14 | 25.10 | 25.81 | +1.06% | |
| 25.91 | 26.17 | 25.29 | 25.54 | -1.43% | |
| 25.54 | 26.13 | 25.03 | 25.91 | +2.13% | |
| 25.43 | 25.70 | 25.17 | 25.37 | -0.24% | |
| 25.46 | 25.55 | 25.06 | 25.43 | +0.32% | |
| 25.60 | 26.02 | 25.30 | 25.35 | -1.78% | |
| 26.73 | 26.79 | 25.77 | 25.81 | -3.26% | |
| 27.59 | 27.64 | 26.52 | 26.68 | -2.59% | |
| 25.99 | 27.80 | 25.96 | 27.39 | +4.82% | |
| 26.25 | 26.63 | 25.66 | 26.13 | -0.53% | |
| 24.81 | 26.31 | 24.65 | 26.27 | +5.25% | |
| 24.39 | 25.12 | 24.20 | 24.96 | +2.63% | |
| 24.60 | 24.83 | 24.00 | 24.32 | -0.65% | |
| 23.54 | 25.41 | 23.45 | 24.48 | +3.64% | |
| 23.69 | 23.99 | 23.51 | 23.62 | -0.84% | |
| 24.08 | 24.18 | 23.50 | 23.82 | -0.54% | |
| 23.64 | 24.39 | 23.49 | 23.95 | +1.31% | |
| 23.75 | 23.94 | 23.56 | 23.64 | -1.13% | |
| 23.84 | 24.28 | 23.56 | 23.91 | +0.55% | |
| 23.65 | 23.80 | 23.24 | 23.78 | +1.02% | |
| 23.00 | 23.69 | 22.76 | 23.54 | +2.17% | |
| 22.84 | 23.07 | 22.57 | 23.04 | +0.48% | |
| 22.82 | 23.14 | 22.30 | 22.93 | -1.08% | |
| 23.47 | 23.74 | 23.07 | 23.18 | -2.77% | |
| 23.88 | 23.92 | 23.04 | 23.84 | +0.42% | |
| 23.05 | 23.83 | 23.03 | 23.74 | +3.40% | |
| 22.59 | 23.05 | 22.59 | 22.96 | +1.91% | |
| 21.86 | 22.65 | 21.52 | 22.53 | +2.36% | |
| 21.88 | 22.15 | 21.69 | 22.01 | +0.59% | |
| 21.69 | 21.97 | 21.63 | 21.88 | -0.64% | |
| 21.86 | 22.44 | 21.72 | 22.02 | +0.18% | |
| 21.50 | 22.07 | 21.41 | 21.98 | +2.14% | |
| 21.60 | 21.81 | 21.26 | 21.52 | -0.37% | |
| 21.64 | 22.20 | 21.44 | 21.60 | -0.37% | |
| 21.38 | 21.76 | 21.24 | 21.68 | -0.28% | |
| 21.64 | 21.99 | 21.15 | 21.74 | +1.87% | |
| 21.11 | 21.59 | 21.08 | 21.34 | +2.30% | |
| 20.90 | 21.23 | 20.77 | 20.86 | -0.24% | |
| 20.02 | 21.07 | 19.89 | 20.91 | +3.62% | |
| 20.18 | 20.27 | 19.84 | 20.18 | +1.00% | |
| 20.16 | 20.22 | 19.61 | 19.98 | -2.15% | |
| 20.00 | 20.57 | 20.00 | 20.42 | +0.54% | |
| 20.74 | 20.90 | 19.55 | 20.31 | -2.26% | |
| 22.48 | 22.65 | 20.40 | 20.78 | +4.90% | |
| 20.22 | 20.25 | 19.60 | 19.81 | -2.12% | |
| 20.06 | 20.28 | 19.88 | 20.24 | +1.71% | |
| 20.11 | 20.38 | 19.86 | 19.90 | -1.58% | |
| 20.11 | 20.46 | 19.70 | 20.22 | +1.40% | |
| 20.35 | 20.41 | 19.67 | 19.94 | -2.16% | |
| 20.31 | 20.53 | 19.95 | 20.38 | -0.97% | |
| 20.24 | 20.70 | 19.99 | 20.58 | +2.13% | |
| 19.38 | 20.27 | 19.38 | 20.15 | +5.06% | |
| 18.97 | 19.31 | 18.96 | 19.18 | +2.46% | |
| 18.90 | 19.12 | 18.50 | 18.72 | -0.79% | |
| 19.08 | 19.34 | 18.73 | 18.87 | -2.23% | |
| 19.71 | 19.95 | 19.20 | 19.30 | -1.48% | |
| 19.42 | 19.89 | 19.42 | 19.59 | -0.20% | |
| 19.78 | 19.91 | 19.52 | 19.63 | -0.61% | |
| 19.84 | 20.35 | 19.63 | 19.75 | -0.55% | |
| 19.40 | 20.14 | 19.40 | 19.86 | +2.37% | |
| 18.87 | 19.50 | 18.83 | 19.40 | +3.14% | |
| 19.10 | 19.39 | 18.41 | 18.81 | -2.49% | |
| 19.00 | 19.68 | 18.95 | 19.29 | +3.04% | |
| 18.97 | 19.15 | 18.61 | 18.72 | -1.58% | |
| 18.86 | 19.13 | 18.61 | 19.02 | +0.74% | |
| 19.96 | 19.96 | 18.52 | 18.88 | -5.98% | |
| 20.06 | 20.28 | 19.74 | 20.08 | +2.40% | |
| 19.48 | 20.01 | 19.08 | 19.61 | -0.15% | |
| 20.35 | 20.35 | 19.63 | 19.64 | -2.29% | |
| 20.32 | 20.54 | 19.91 | 20.10 | -0.40% | |
| 20.71 | 20.71 | 19.86 | 20.18 | -2.56% | |
| 21.12 | 21.24 | 19.66 | 20.71 | -4.91% | |
| 21.01 | 21.81 | 20.88 | 21.78 | +3.52% | |
| 21.00 | 22.00 | 20.79 | 21.04 | +0.10% | |
| 19.77 | 21.09 | 19.77 | 21.02 | +7.63% | |
| 18.61 | 19.58 | 18.50 | 19.53 | +6.55% | |
| 18.80 | 18.90 | 18.22 | 18.33 | -2.55% | |
| 19.51 | 19.66 | 18.70 | 18.81 | -3.09% | |
| 19.94 | 20.26 | 19.15 | 19.41 | -2.76% | |
| 19.91 | 20.41 | 19.62 | 19.96 | +1.27% | |
| 20.11 | 20.29 | 19.59 | 19.71 | -1.89% | |
| 19.90 | 20.55 | 19.90 | 20.09 | -2.14% | |
| 20.15 | 20.65 | 20.10 | 20.53 | +1.18% | |
| 20.21 | 20.77 | 19.99 | 20.29 | +0.64% | |
| 19.53 | 20.27 | 19.53 | 20.16 | +3.97% | |
| 19.75 | 19.85 | 19.34 | 19.39 | -1.77% | |
| 18.86 | 20.14 | 18.85 | 19.74 | +5.56% | |
| 18.28 | 18.90 | 18.28 | 18.70 | +3.20% | |
| 18.26 | 18.36 | 17.73 | 18.12 | -1.79% | |
| 18.36 | 18.67 | 18.10 | 18.45 | +0.16% | |
| 18.63 | 19.01 | 18.22 | 18.42 | -2.28% | |
| 19.28 | 19.46 | 18.55 | 18.85 | -2.33% | |
| 19.04 | 19.55 | 19.02 | 19.30 | +1.05% | |
| 19.31 | 19.34 | 18.50 | 19.10 | +1.54% | |
| 18.45 | 19.12 | 18.45 | 18.81 | +2.17% | |
| 18.25 | 18.44 | 17.93 | 18.41 | +1.38% | |
| 18.07 | 18.37 | 17.76 | 18.16 | +0.44% | |
| 17.81 | 18.19 | 17.70 | 18.08 | +1.46% | |
| 17.28 | 17.91 | 17.00 | 17.82 | +3.60% | |
| 16.70 | 17.31 | 16.65 | 17.20 | +1.96% | |
| 17.27 | 17.53 | 16.76 | 16.87 | -2.49% | |
| 17.81 | 18.08 | 17.26 | 17.30 | -5.57% | |
| 17.50 | 18.57 | 17.43 | 18.32 | +4.69% | |
| 18.41 | 18.58 | 17.26 | 17.50 | -5.15% | |
| 19.13 | 19.41 | 18.33 | 18.45 | -2.89% | |
| 18.58 | 19.53 | 18.28 | 19.00 | -20.93% | |
| 24.01 | 24.35 | 23.87 | 24.03 | +0.54% | |
| 23.50 | 24.15 | 23.50 | 23.90 | +2.18% | |
| 22.85 | 23.46 | 22.75 | 23.39 | +2.86% | |
| 21.82 | 23.22 | 21.72 | 22.74 | +3.93% | |
| 21.98 | 22.26 | 21.64 | 21.88 | -0.36% | |
| 21.63 | 22.36 | 21.57 | 21.96 | +1.53% | |
| 21.50 | 21.86 | 21.48 | 21.63 | -0.87% | |
| 21.71 | 22.04 | 21.56 | 21.82 | +0.79% | |
| 21.47 | 22.06 | 21.46 | 21.65 | +1.12% | |
| 21.05 | 21.60 | 20.77 | 21.41 | +1.90% | |
| 20.99 | 21.23 | 20.77 | 21.01 | +0.10% | |
| 21.40 | 21.59 | 20.77 | 20.99 | -1.04% | |
| 22.38 | 22.66 | 21.10 | 21.21 | -7.46% | |
| 22.67 | 23.26 | 22.54 | 22.92 | +0.17% | |
| 22.18 | 23.00 | 21.98 | 22.88 | +4.91% | |
| 21.67 | 22.02 | 21.41 | 21.81 | +0.60% | |
| 21.38 | 21.76 | 21.19 | 21.68 | +1.40% | |
| 21.36 | 21.70 | 21.12 | 21.38 | +0.09% | |
| 20.17 | 21.48 | 20.17 | 21.36 | +4.86% | |
| 20.98 | 21.10 | 20.14 | 20.37 | -2.40% | |
| 20.32 | 21.19 | 20.32 | 20.87 | +2.30% | |
| 20.68 | 21.07 | 20.18 | 20.40 | -0.87% | |
| 20.39 | 20.81 | 20.26 | 20.58 | 0.00% | |
| 20.45 | 20.73 | 20.04 | 20.58 | +0.64% | |
| 19.95 | 20.66 | 19.88 | 20.45 | +1.04% | |
| 19.74 | 20.31 | 19.68 | 20.24 | +3.32% | |
| 19.53 | 20.00 | 19.27 | 19.59 | +1.93% | |
| 19.15 | 19.67 | 19.07 | 19.22 | +1.10% | |
| 19.37 | 19.64 | 18.92 | 19.01 | -2.66% | |
| 19.50 | 19.80 | 18.98 | 19.53 | -0.20% | |
| 19.45 | 19.96 | 19.39 | 19.57 | +1.77% | |
| 19.10 | 19.57 | 18.98 | 19.23 | 0.00% | |
| 20.04 | 20.08 | 19.23 | 19.23 | -1.38% | |
| 19.56 | 19.76 | 19.15 | 19.50 | -0.20% | |
| 19.10 | 19.82 | 19.06 | 19.54 | +2.84% | |
| 19.21 | 19.47 | 18.97 | 19.00 | -2.61% | |
| 19.48 | 20.00 | 19.48 | 19.51 | +0.52% | |
| 18.93 | 19.46 | 18.65 | 19.41 | +6.77% | |
| 18.23 | 18.46 | 17.81 | 18.18 | 0.00% | |
| 18.58 | 18.58 | 17.03 | 18.18 | -3.14% | |
| 18.91 | 19.50 | 18.52 | 18.77 | -0.74% | |
| 19.21 | 19.57 | 18.84 | 18.91 | -1.56% | |
| 18.97 | 19.37 | 18.52 | 19.21 | -0.67% | |
| 20.05 | 20.08 | 18.94 | 19.34 | -5.38% | |
| 19.67 | 20.60 | 19.54 | 20.44 | +2.40% | |
| 19.97 | 20.20 | 19.56 | 19.96 | +0.66% | |
| 20.35 | 21.07 | 19.81 | 19.83 | -5.62% | |
| 20.30 | 21.14 | 19.95 | 21.01 | +3.86% | |
| 22.44 | 23.27 | 19.83 | 20.23 | -23.63% | |
| 28.00 | 28.17 | 26.27 | 26.49 | -5.29% | |
| 27.73 | 27.99 | 27.03 | 27.97 | +1.08% | |
| 27.65 | 28.37 | 27.42 | 27.67 | +0.44% | |
| 28.42 | 28.75 | 27.19 | 27.55 | -3.43% | |
| 28.58 | 28.98 | 28.03 | 28.53 | -0.04% | |
| 28.56 | 28.71 | 28.42 | 28.54 | -0.42% | |
| 28.45 | 29.16 | 28.36 | 28.66 | +0.74% | |
| 28.65 | 29.23 | 28.39 | 28.45 | -0.18% | |
| 27.82 | 29.00 | 27.76 | 28.50 | +3.45% | |
| 28.62 | 28.62 | 27.24 | 27.55 | -3.64% | |
| 28.62 | 29.09 | 28.48 | 28.59 | +0.07% | |
| 28.75 | 28.92 | 28.49 | 28.57 | -0.14% | |
| 29.08 | 29.20 | 28.37 | 28.61 | -2.22% | |
| 28.61 | 29.46 | 28.61 | 29.26 | +2.20% | |
| 28.45 | 29.22 | 28.45 | 28.63 | +0.07% | |
| 28.79 | 29.37 | 28.56 | 28.61 | +1.31% | |
| 27.57 | 28.28 | 27.06 | 28.24 | +1.15% | |
| 26.36 | 28.13 | 26.34 | 27.92 | +5.40% | |
| 26.15 | 26.60 | 26.04 | 26.49 | +1.30% | |
| 26.10 | 26.43 | 25.80 | 26.15 | +0.11% | |
| 26.45 | 26.45 | 25.86 | 26.12 | -0.50% | |
| 26.39 | 26.58 | 25.81 | 26.25 | -1.32% | |
| 25.92 | 26.71 | 25.63 | 26.60 | +2.62% | |
| 26.03 | 26.37 | 25.81 | 25.92 | -0.88% | |
| 26.25 | 26.92 | 26.10 | 26.15 | -0.27% | |
| 25.96 | 26.59 | 25.93 | 26.22 | +1.04% | |
| 25.62 | 26.75 | 25.47 | 25.95 | -0.46% | |
| 25.94 | 26.23 | 25.42 | 26.07 | +0.27% | |
| 27.65 | 27.69 | 25.94 | 26.00 | -6.34% | |
| 28.80 | 29.20 | 27.61 | 27.76 | -3.98% | |
| 29.16 | 29.38 | 28.40 | 28.91 | -1.67% | |
| 28.05 | 29.52 | 27.31 | 29.40 | +5.98% | |
| 27.71 | 28.02 | 27.43 | 27.74 | 0.00% | |
| 27.40 | 28.34 | 27.23 | 27.74 | +1.50% | |
| 27.83 | 28.28 | 27.15 | 27.33 | -1.05% | |
| 26.53 | 27.75 | 26.51 | 27.62 | +3.37% | |
| 26.21 | 27.45 | 26.11 | 26.72 | +0.98% | |
| 26.91 | 26.93 | 26.02 | 26.46 | -1.19% | |
| 27.06 | 27.06 | 26.64 | 26.78 | -0.81% | |
| 26.75 | 27.16 | 26.73 | 27.00 | +0.78% | |
| 27.00 | 27.23 | 26.77 | 26.79 | -1.22% | |
| 26.77 | 27.17 | 26.55 | 27.12 | +1.16% | |
| 26.45 | 27.12 | 26.44 | 26.81 | +1.36% | |
| 27.24 | 27.26 | 26.26 | 26.45 | -3.18% | |
| 26.50 | 27.44 | 26.35 | 27.32 | +2.71% | |
| 26.40 | 26.80 | 26.33 | 26.60 | +0.38% | |
| 26.04 | 26.62 | 25.92 | 26.50 | +1.65% | |
| 25.60 | 26.52 | 25.47 | 26.07 | +1.80% | |
| 26.18 | 26.31 | 25.16 | 25.61 | -2.66% | |
| 25.78 | 26.50 | 25.56 | 26.31 | +4.12% | |
| 26.13 | 26.13 | 25.20 | 25.27 | -2.43% | |
| 25.81 | 25.94 | 25.47 | 25.90 | +0.74% | |
| 25.64 | 25.91 | 25.22 | 25.71 | +0.23% | |
| 25.97 | 26.39 | 25.56 | 25.65 | -1.38% | |
| 26.81 | 26.85 | 25.95 | 26.01 | -2.84% | |
| 27.15 | 27.47 | 26.69 | 26.77 | -1.40% | |
| 27.58 | 27.84 | 26.97 | 27.15 | -1.56% | |
| 26.86 | 27.82 | 26.75 | 27.58 | +3.41% | |
| 27.46 | 27.62 | 26.23 | 26.67 | -2.84% | |
| 27.44 | 27.82 | 27.30 | 27.45 | -0.90% | |
| 27.47 | 27.78 | 27.37 | 27.70 | +1.24% | |
| 27.44 | 27.83 | 27.23 | 27.36 | -1.19% | |
| 27.00 | 27.76 | 26.90 | 27.69 | +3.67% | |
| 25.96 | 26.79 | 25.82 | 26.71 | +2.69% | |
| 25.45 | 26.53 | 25.40 | 26.01 | +2.56% | |
| 25.54 | 26.01 | 24.92 | 25.36 | -0.04% | |
| 25.81 | 26.28 | 25.13 | 25.37 | -2.05% | |
| 25.82 | 26.57 | 25.39 | 25.90 | -0.46% | |
| 26.04 | 26.54 | 25.69 | 26.02 | -0.15% | |
| 26.15 | 26.47 | 25.90 | 26.06 | -1.18% | |
| 27.66 | 27.86 | 26.00 | 26.37 | -5.25% | |
| 27.16 | 29.00 | 27.12 | 27.83 | +2.47% | |
| 26.00 | 27.21 | 26.00 | 27.16 | +3.98% | |
| 24.03 | 26.83 | 23.81 | 26.12 | +8.70% | |
| 26.15 | 27.40 | 23.67 | 24.03 | -0.83% | |
| 25.41 | 25.53 | 24.15 | 24.23 | -4.27% | |
| 25.07 | 25.65 | 25.07 | 25.31 | +0.20% | |
| 25.20 | 25.40 | 24.93 | 25.26 | -0.16% | |
| 25.30 | 25.85 | 24.90 | 25.30 | -0.78% | |
| 24.36 | 25.60 | 24.24 | 25.50 | +3.41% | |
| 24.24 | 24.81 | 24.02 | 24.66 | +1.73% | |
| 24.01 | 24.71 | 23.90 | 24.24 | +0.25% | |
| 23.92 | 24.45 | 23.77 | 24.18 | +0.58% | |
| 24.38 | 24.55 | 23.98 | 24.04 | -1.96% | |
| 24.72 | 24.89 | 24.46 | 24.52 | -0.81% | |
| 24.59 | 24.87 | 24.24 | 24.72 | +0.82% | |
| 24.14 | 24.83 | 23.97 | 24.52 | +1.07% | |
| 23.73 | 24.38 | 23.73 | 24.26 | +2.23% | |
| 23.78 | 24.10 | 23.67 | 23.73 | -0.21% | |
| 23.09 | 23.89 | 23.09 | 23.78 | +2.41% | |
| 23.13 | 23.61 | 22.94 | 23.22 | +0.35% | |
| 23.85 | 24.20 | 22.94 | 23.14 | -3.02% | |
| 23.33 | 23.98 | 23.33 | 23.86 | +1.49% | |
| 23.69 | 24.21 | 23.42 | 23.51 | -0.51% | |
| 25.01 | 25.02 | 23.20 | 23.63 | -5.37% | |
| 25.92 | 26.11 | 24.68 | 24.97 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the AMPH chart for longer ranges.