5 DAY PERFORMANCE
+0.56%
1 MONTH PERFORMANCE
+9.93%
3 MONTH PERFORMANCE
+12.97%
6 MONTH PERFORMANCE
-5.51%
YEAR-TO-DATE PERFORMANCE
+7.02%
1 YEAR PERFORMANCE
-8.17%
Amphastar Pharmaceuticals Inc Stock Chart
Share Price History
| Date | Opening Price | Closing Price | High | Low | Volume | Market Capitalization |
|---|---|---|---|---|---|---|
| 02/18/2026 | $28.45 | $28.66 (0.74%) | $29.16 | $28.36 | 325.94 K | $1.33 B |
| 02/17/2026 | $28.65 | $28.45 (-0.7%) | $29.23 | $28.39 | 316.90 K | $1.32 B |
| 02/13/2026 | $27.82 | $28.50 (2.44%) | $29.00 | $27.76 | 268.70 K | $1.32 B |
| 02/12/2026 | $28.62 | $27.55 (-3.74%) | $28.62 | $27.24 | 437.54 K | $1.28 B |
| 02/11/2026 | $28.62 | $28.59 (-0.1%) | $29.09 | $28.48 | 236.62 K | $1.33 B |
| 02/10/2026 | $28.75 | $28.57 (-0.63%) | $28.92 | $28.49 | 182.60 K | $1.33 B |
| 02/09/2026 | $29.08 | $28.61 (-1.62%) | $29.20 | $28.37 | 285.02 K | $1.33 B |
| 02/06/2026 | $28.61 | $29.26 (2.27%) | $29.46 | $28.61 | 343.84 K | $1.36 B |
| 02/05/2026 | $28.45 | $28.63 (0.63%) | $29.22 | $28.45 | 288.03 K | $1.33 B |
| 02/04/2026 | $28.79 | $28.61 (-0.63%) | $29.37 | $28.56 | 378.90 K | $1.33 B |
| 02/03/2026 | $27.57 | $28.24 (2.43%) | $28.28 | $27.06 | 506.30 K | $1.31 B |
| 02/02/2026 | $26.36 | $27.92 (5.92%) | $28.13 | $26.34 | 444.10 K | $1.30 B |
| 01/30/2026 | $26.15 | $26.49 (1.3%) | $26.60 | $26.04 | 294.50 K | $1.23 B |
| 01/29/2026 | $26.10 | $26.15 (0.19%) | $26.43 | $25.80 | 184.40 K | $1.22 B |
| 01/28/2026 | $26.45 | $26.12 (-1.25%) | $26.45 | $25.86 | 209.03 K | $1.21 B |
| 01/27/2026 | $26.39 | $26.25 (-0.53%) | $26.58 | $25.81 | 264.51 K | $1.22 B |
| 01/26/2026 | $25.92 | $26.60 (2.62%) | $26.71 | $25.63 | 316.20 K | $1.24 B |
| 01/23/2026 | $26.03 | $25.92 (-0.42%) | $26.37 | $25.81 | 269.50 K | $1.20 B |
| 01/22/2026 | $26.25 | $26.15 (-0.38%) | $26.92 | $26.10 | 233.30 K | $1.22 B |
| 01/21/2026 | $25.96 | $26.22 (1%) | $26.59 | $25.93 | 251.62 K | $1.22 B |
| 01/20/2026 | $25.62 | $25.95 (1.29%) | $26.75 | $25.47 | 282.61 K | $1.21 B |
| 01/16/2026 | $25.94 | $26.07 (0.5%) | $26.23 | $25.42 | 286.95 K | $1.21 B |
| 01/15/2026 | $27.65 | $26.00 (-5.97%) | $27.69 | $25.94 | 584.10 K | $1.21 B |
| 01/14/2026 | $28.80 | $27.76 (-3.61%) | $29.20 | $27.61 | 472.42 K | $1.29 B |
| 01/13/2026 | $29.16 | $28.91 (-0.86%) | $29.38 | $28.40 | 345.64 K | $1.34 B |
| 01/12/2026 | $28.05 | $29.40 (4.81%) | $29.52 | $27.31 | 455.86 K | $1.37 B |
| 01/09/2026 | $27.71 | $27.74 (0.11%) | $28.02 | $27.43 | 247.22 K | $1.29 B |
| 01/08/2026 | $27.40 | $27.74 (1.24%) | $28.34 | $27.23 | 304.49 K | $1.29 B |
| 01/07/2026 | $27.83 | $27.33 (-1.8%) | $28.28 | $27.15 | 342.80 K | $1.27 B |
| 01/06/2026 | $26.53 | $27.62 (4.11%) | $27.75 | $26.51 | 300.10 K | $1.28 B |
| 01/05/2026 | $26.21 | $26.72 (1.95%) | $27.45 | $26.11 | 419.20 K | $1.24 B |
| 01/02/2026 | $26.91 | $26.46 (-1.67%) | $26.93 | $26.02 | 406.00 K | $1.23 B |
| 12/31/2025 | $27.06 | $26.78 (-1.03%) | $27.06 | $26.64 | 218.30 K | $1.24 B |
| 12/30/2025 | $26.75 | $27.00 (0.93%) | $27.16 | $26.73 | 251.52 K | $1.25 B |
| 12/29/2025 | $27.00 | $26.79 (-0.78%) | $27.23 | $26.77 | 220.50 K | $1.25 B |
| 12/26/2025 | $26.77 | $27.12 (1.31%) | $27.17 | $26.55 | 229.04 K | $1.26 B |
| 12/24/2025 | $26.45 | $26.81 (1.36%) | $27.12 | $26.44 | 175.20 K | $1.25 B |
| 12/23/2025 | $27.24 | $26.45 (-2.9%) | $27.26 | $26.26 | 333.34 K | $1.23 B |
| 12/22/2025 | $26.50 | $27.32 (3.09%) | $27.44 | $26.35 | 507.33 K | $1.27 B |
| 12/19/2025 | $26.40 | $26.60 (0.76%) | $26.80 | $26.33 | 812.11 K | $1.24 B |
| 12/18/2025 | $26.04 | $26.50 (1.77%) | $26.62 | $25.92 | 340.80 K | $1.23 B |
| 12/17/2025 | $25.60 | $26.07 (1.84%) | $26.52 | $25.47 | 389.86 K | $1.21 B |
| 12/16/2025 | $26.18 | $25.61 (-2.18%) | $26.31 | $25.16 | 499.50 K | $1.19 B |
| 12/15/2025 | $25.78 | $26.31 (2.06%) | $26.50 | $25.56 | 472.90 K | $1.22 B |
| 12/12/2025 | $26.13 | $25.27 (-3.29%) | $26.13 | $25.20 | 341.41 K | $1.17 B |
| 12/11/2025 | $25.81 | $25.90 (0.35%) | $25.94 | $25.47 | 284.94 K | $1.20 B |
| 12/10/2025 | $25.64 | $25.71 (0.27%) | $25.91 | $25.22 | 483.52 K | $1.19 B |
| 12/09/2025 | $25.97 | $25.65 (-1.23%) | $26.39 | $25.56 | 414.10 K | $1.19 B |
| 12/08/2025 | $26.81 | $26.01 (-2.98%) | $26.85 | $25.95 | 300.94 K | $1.21 B |
| 12/05/2025 | $27.15 | $26.77 (-1.4%) | $27.47 | $26.69 | 323.53 K | $1.24 B |
| 12/04/2025 | $27.58 | $27.15 (-1.56%) | $27.84 | $26.97 | 404.95 K | $1.26 B |
| 12/03/2025 | $26.86 | $27.58 (2.68%) | $27.82 | $26.75 | 317.35 K | $1.28 B |
| 12/02/2025 | $27.46 | $26.67 (-2.88%) | $27.62 | $26.23 | 456.40 K | $1.24 B |
| 12/01/2025 | $27.44 | $27.45 (0.04%) | $27.82 | $27.30 | 355.92 K | $1.28 B |
| 11/28/2025 | $27.47 | $27.70 (0.84%) | $27.78 | $27.37 | 208.31 K | $1.29 B |
| 11/26/2025 | $27.44 | $27.36 (-0.29%) | $27.83 | $27.23 | 410.90 K | $1.27 B |
| 11/25/2025 | $27.00 | $27.69 (2.56%) | $27.76 | $26.90 | 375.51 K | $1.29 B |
| 11/24/2025 | $25.96 | $26.71 (2.89%) | $26.79 | $25.82 | 349.50 K | $1.24 B |
| 11/21/2025 | $25.45 | $26.01 (2.2%) | $26.53 | $25.40 | 392.92 K | $1.21 B |
| 11/20/2025 | $25.54 | $25.36 (-0.7%) | $26.01 | $24.92 | 355.83 K | $1.18 B |
| 11/19/2025 | $25.81 | $25.37 (-1.7%) | $26.28 | $25.13 | 524.40 K | $1.18 B |
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