Amphastar Pharmaceuticals, Inc. (AMPH)
NASDAQ: AMPH · Real-Time Price · USD
24.24
+0.06 (0.25%)
At close: Oct 29, 2025, 4:00 PM EDT
24.24
0.00 (0.00%)
After-hours: Oct 29, 2025, 5:20 PM EDT
Amphastar Pharmaceuticals Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 29, 2025 | 24.01 | 24.65 | 23.91 | 24.60 | - | 1.74% | 121,179 |
| Oct 28, 2025 | 23.92 | 24.45 | 23.77 | 24.18 | 24.18 | 0.58% | 264,331 |
| Oct 27, 2025 | 24.38 | 24.55 | 23.98 | 24.04 | 24.04 | -1.96% | 319,227 |
| Oct 24, 2025 | 24.72 | 24.89 | 24.46 | 24.52 | 24.52 | -0.81% | 220,779 |
| Oct 23, 2025 | 24.59 | 24.87 | 24.24 | 24.72 | 24.72 | 0.82% | 309,413 |
| Oct 22, 2025 | 24.14 | 24.83 | 23.97 | 24.52 | 24.52 | 1.07% | 582,786 |
| Oct 21, 2025 | 23.73 | 24.38 | 23.73 | 24.26 | 24.26 | 2.23% | 335,175 |
| Oct 20, 2025 | 23.78 | 24.10 | 23.67 | 23.73 | 23.73 | -0.21% | 255,762 |
| Oct 17, 2025 | 23.09 | 23.89 | 23.09 | 23.78 | 23.78 | 2.41% | 321,594 |
| Oct 16, 2025 | 23.13 | 23.61 | 22.94 | 23.22 | 23.22 | 0.35% | 449,608 |
| Oct 15, 2025 | 23.85 | 24.20 | 22.94 | 23.14 | 23.14 | -3.02% | 504,313 |
| Oct 14, 2025 | 23.33 | 23.98 | 23.33 | 23.86 | 23.86 | 1.49% | 282,166 |
| Oct 13, 2025 | 23.69 | 24.21 | 23.42 | 23.51 | 23.51 | -0.51% | 324,141 |
| Oct 10, 2025 | 25.01 | 25.02 | 23.20 | 23.63 | 23.63 | -5.37% | 607,448 |
| Oct 9, 2025 | 25.92 | 26.11 | 24.68 | 24.97 | 24.97 | -3.89% | 441,557 |
| Oct 8, 2025 | 26.00 | 26.32 | 25.57 | 25.98 | 25.98 | 0.58% | 250,038 |
| Oct 7, 2025 | 26.45 | 26.68 | 25.80 | 25.83 | 25.83 | -2.82% | 390,489 |
| Oct 6, 2025 | 26.82 | 27.07 | 26.53 | 26.58 | 26.58 | -0.64% | 241,845 |
| Oct 3, 2025 | 26.51 | 27.31 | 26.46 | 26.75 | 26.75 | 0.87% | 331,099 |
| Oct 2, 2025 | 26.86 | 27.03 | 26.46 | 26.52 | 26.52 | -1.74% | 288,366 |
| Oct 1, 2025 | 26.74 | 27.39 | 26.74 | 26.99 | 26.99 | 1.28% | 337,099 |
| Sep 30, 2025 | 26.93 | 27.27 | 26.47 | 26.65 | 26.65 | -1.00% | 392,172 |
| Sep 29, 2025 | 26.87 | 27.21 | 26.35 | 26.92 | 26.92 | 0.26% | 513,361 |
| Sep 26, 2025 | 26.62 | 26.92 | 26.34 | 26.85 | 26.85 | 1.86% | 291,264 |
| Sep 25, 2025 | 26.88 | 26.89 | 25.95 | 26.36 | 26.36 | -1.90% | 565,989 |
| Sep 24, 2025 | 27.43 | 27.62 | 26.78 | 26.87 | 26.87 | -1.97% | 302,731 |
| Sep 23, 2025 | 27.88 | 28.22 | 27.21 | 27.41 | 27.41 | -1.72% | 323,932 |
| Sep 22, 2025 | 27.88 | 28.24 | 27.61 | 27.89 | 27.89 | 0.90% | 424,678 |
| Sep 19, 2025 | 27.37 | 27.77 | 26.87 | 27.64 | 27.64 | 0.73% | 1,384,028 |
| Sep 18, 2025 | 27.09 | 27.70 | 26.90 | 27.44 | 27.44 | 1.70% | 458,903 |
| Sep 17, 2025 | 27.13 | 27.90 | 26.57 | 26.98 | 26.98 | -0.07% | 920,934 |
| Sep 16, 2025 | 27.30 | 27.51 | 26.87 | 27.00 | 27.00 | -0.99% | 497,864 |
| Sep 15, 2025 | 28.07 | 28.39 | 27.23 | 27.27 | 27.27 | -2.82% | 422,797 |
| Sep 12, 2025 | 28.86 | 28.86 | 27.91 | 28.06 | 28.06 | -2.16% | 273,671 |
| Sep 11, 2025 | 28.36 | 28.89 | 28.36 | 28.68 | 28.68 | 0.99% | 422,254 |
| Sep 10, 2025 | 29.18 | 29.26 | 28.34 | 28.40 | 28.40 | -3.17% | 309,841 |
| Sep 9, 2025 | 29.26 | 29.43 | 28.99 | 29.33 | 29.33 | 0.24% | 379,382 |
| Sep 8, 2025 | 29.30 | 29.41 | 28.49 | 29.26 | 29.26 | -0.54% | 385,699 |
| Sep 5, 2025 | 29.08 | 29.78 | 28.98 | 29.42 | 29.42 | 0.79% | 414,943 |
| Sep 4, 2025 | 29.39 | 29.59 | 28.88 | 29.19 | 29.19 | -0.68% | 553,530 |
| Sep 3, 2025 | 30.49 | 31.10 | 29.29 | 29.39 | 29.39 | -4.61% | 566,946 |
| Sep 2, 2025 | 30.86 | 31.26 | 30.44 | 30.81 | 30.81 | 0.62% | 414,770 |
| Aug 29, 2025 | 30.21 | 30.81 | 30.18 | 30.62 | 30.62 | 1.19% | 290,925 |
| Aug 28, 2025 | 30.50 | 30.56 | 29.86 | 30.26 | 30.26 | -0.75% | 316,721 |
| Aug 27, 2025 | 30.10 | 30.95 | 30.10 | 30.49 | 30.49 | 0.49% | 326,146 |
| Aug 26, 2025 | 29.98 | 30.80 | 29.93 | 30.34 | 30.34 | 1.71% | 408,475 |
| Aug 25, 2025 | 30.53 | 30.55 | 29.47 | 29.83 | 29.83 | -2.20% | 374,384 |
| Aug 22, 2025 | 29.98 | 30.90 | 29.98 | 30.50 | 30.50 | 2.83% | 494,915 |
| Aug 21, 2025 | 29.57 | 30.42 | 29.43 | 29.66 | 29.66 | 0.14% | 491,388 |
| Aug 20, 2025 | 30.21 | 30.39 | 29.42 | 29.62 | 29.62 | -2.34% | 434,164 |