5 DAY PERFORMANCE
-24.46%
1 MONTH PERFORMANCE
-16.22%
3 MONTH PERFORMANCE
+1.75%
6 MONTH PERFORMANCE
-5.83%
YEAR-TO-DATE PERFORMANCE
-28.27%
1 YEAR PERFORMANCE
-26.06%
Amphastar Pharmaceuticals Inc Stock Chart
Share Price History
| Date | Opening Price | Closing Price | High | Low | Volume | Market Capitalization |
|---|---|---|---|---|---|---|
| 10/08/2026 | $25.39 | $25.81 (1.65%) | $26.14 | $25.10 | 422.79 K | $1.13 B |
| 10/07/2026 | $25.91 | $25.54 (-1.43%) | $26.17 | $25.29 | 776.30 K | $1.11 B |
| 10/06/2026 | $25.54 | $25.91 (1.45%) | $26.13 | $25.03 | 469.15 K | $1.13 B |
| 10/05/2026 | $25.43 | $25.37 (-0.24%) | $25.70 | $25.17 | 454.52 K | $1.11 B |
| 10/02/2026 | $25.46 | $25.43 (-0.12%) | $25.55 | $25.06 | 374.22 K | $1.11 B |
| 10/01/2026 | $25.60 | $25.35 (-0.98%) | $26.02 | $25.30 | 531.00 K | $1.11 B |
| 09/30/2026 | $26.73 | $25.81 (-3.44%) | $26.79 | $25.77 | 509.40 K | $1.13 B |
| 09/29/2026 | $27.59 | $26.68 (-3.3%) | $27.64 | $26.52 | 632.00 K | $1.16 B |
| 09/28/2026 | $25.99 | $27.39 (5.39%) | $27.80 | $25.96 | 751.80 K | $1.20 B |
| 09/25/2026 | $26.25 | $26.13 (-0.46%) | $26.63 | $25.66 | 376.92 K | $1.14 B |
| 09/24/2026 | $24.81 | $26.27 (5.88%) | $26.31 | $24.65 | 572.10 K | $1.15 B |
| 09/23/2026 | $24.39 | $24.96 (2.34%) | $25.12 | $24.20 | 508.10 K | $1.09 B |
| 09/22/2026 | $24.60 | $24.32 (-1.14%) | $24.83 | $24.00 | 522.40 K | $1.06 B |
| 09/21/2026 | $23.54 | $24.48 (3.99%) | $25.41 | $23.45 | 595.80 K | $1.07 B |
| 09/18/2026 | $23.69 | $23.62 (-0.3%) | $23.99 | $23.51 | 1.46 M | $1.03 B |
| 09/17/2026 | $24.08 | $23.82 (-1.08%) | $24.18 | $23.50 | 465.64 K | $1.04 B |
| 09/16/2026 | $23.64 | $23.95 (1.31%) | $24.39 | $23.49 | 503.90 K | $1.05 B |
| 09/15/2026 | $23.75 | $23.64 (-0.46%) | $23.94 | $23.56 | 354.42 K | $1.03 B |
| 09/14/2026 | $23.84 | $23.91 (0.29%) | $24.28 | $23.56 | 474.90 K | $1.04 B |
| 09/11/2026 | $23.65 | $23.78 (0.55%) | $23.80 | $23.24 | 410.95 K | $1.04 B |
| 09/10/2026 | $23.00 | $23.54 (2.35%) | $23.69 | $22.76 | 515.00 K | $1.03 B |
| 09/09/2026 | $22.84 | $23.04 (0.88%) | $23.07 | $22.57 | 351.60 K | $1.01 B |
| 09/08/2026 | $22.82 | $22.93 (0.48%) | $23.14 | $22.30 | 460.02 K | $1.00 B |
| 09/04/2026 | $23.47 | $23.18 (-1.24%) | $23.74 | $23.07 | 650.13 K | $1.01 B |
| 09/03/2026 | $23.88 | $23.84 (-0.17%) | $23.92 | $23.04 | 469.80 K | $1.04 B |
| 09/02/2026 | $23.05 | $23.74 (2.99%) | $23.83 | $23.03 | 456.78 K | $1.04 B |
| 09/01/2026 | $22.59 | $22.96 (1.64%) | $23.05 | $22.59 | 551.00 K | $1.00 B |
| 08/31/2026 | $21.86 | $22.53 (3.06%) | $22.65 | $21.52 | 274.03 K | $983.30 M |
| 08/28/2026 | $21.88 | $22.01 (0.59%) | $22.15 | $21.69 | 224.53 K | $960.60 M |
| 08/27/2026 | $21.69 | $21.88 (0.88%) | $21.97 | $21.63 | 259.80 K | $954.93 M |
| 08/26/2026 | $21.86 | $22.02 (0.73%) | $22.44 | $21.72 | 395.61 K | $961.04 M |
| 08/25/2026 | $21.50 | $21.98 (2.23%) | $22.07 | $21.41 | 283.80 K | $959.30 M |
| 08/24/2026 | $21.60 | $21.52 (-0.37%) | $21.81 | $21.26 | 210.30 K | $939.22 M |
| 08/21/2026 | $21.64 | $21.60 (-0.18%) | $22.20 | $21.44 | 376.60 K | $942.71 M |
| 08/20/2026 | $21.38 | $21.68 (1.4%) | $21.76 | $21.24 | 338.70 K | $946.20 M |
| 08/19/2026 | $21.64 | $21.74 (0.46%) | $21.99 | $21.15 | 410.80 K | $948.82 M |
| 08/18/2026 | $21.11 | $21.34 (1.09%) | $21.59 | $21.08 | 411.88 K | $931.36 M |
| 08/17/2026 | $20.90 | $20.86 (-0.19%) | $21.23 | $20.77 | 533.50 K | $910.41 M |
| 08/14/2026 | $20.02 | $20.91 (4.45%) | $21.07 | $19.89 | 305.70 K | $912.60 M |
| 08/13/2026 | $20.18 | $20.18 (0%) | $20.27 | $19.84 | 526.12 K | $880.74 M |
| 08/12/2026 | $20.16 | $19.98 (-0.89%) | $20.22 | $19.61 | 343.84 K | $872.01 M |
| 08/11/2026 | $20.00 | $20.42 (2.1%) | $20.57 | $20.00 | 570.50 K | $891.21 M |
| 08/10/2026 | $20.74 | $20.31 (-2.07%) | $20.90 | $19.55 | 645.75 K | $886.41 M |
| 08/07/2026 | $22.48 | $20.78 (-7.56%) | $22.65 | $20.40 | 1.30 M | $906.92 M |
| 08/06/2026 | $20.22 | $19.81 (-2.03%) | $20.25 | $19.60 | 527.33 K | $864.59 M |
| 08/05/2026 | $20.06 | $20.24 (0.9%) | $20.28 | $19.88 | 351.62 K | $883.35 M |
| 08/04/2026 | $20.11 | $19.90 (-1.04%) | $20.38 | $19.86 | 481.65 K | $868.52 M |
| 08/03/2026 | $20.11 | $20.22 (0.55%) | $20.45 | $19.70 | 413.20 K | $882.48 M |
| 07/31/2026 | $20.35 | $19.94 (-2.01%) | $20.41 | $19.67 | 367.63 K | $870.26 M |
| 07/30/2026 | $20.31 | $20.38 (0.34%) | $20.53 | $19.95 | 355.70 K | $889.46 M |
| 07/29/2026 | $20.24 | $20.58 (1.68%) | $20.70 | $19.99 | 321.70 K | $898.19 M |
| 07/28/2026 | $19.38 | $20.15 (3.97%) | $20.27 | $19.38 | 390.84 K | $879.43 M |
| 07/27/2026 | $18.97 | $19.18 (1.11%) | $19.31 | $18.96 | 285.92 K | $837.09 M |
| 07/24/2026 | $18.90 | $18.72 (-0.95%) | $19.12 | $18.50 | 445.70 K | $817.02 M |
| 07/23/2026 | $19.08 | $18.87 (-1.1%) | $19.34 | $18.73 | 650.43 K | $823.56 M |
| 07/22/2026 | $19.71 | $19.30 (-2.08%) | $19.95 | $19.20 | 409.24 K | $842.33 M |
| 07/21/2026 | $19.42 | $19.59 (0.88%) | $19.89 | $19.42 | 621.10 K | $854.99 M |
| 07/20/2026 | $19.78 | $19.63 (-0.76%) | $19.91 | $19.52 | 437.42 K | $856.73 M |
| 07/17/2026 | $19.84 | $19.75 (-0.45%) | $20.35 | $19.63 | 338.50 K | $861.97 M |
| 07/16/2026 | $19.40 | $19.86 (2.37%) | $20.14 | $19.40 | 416.90 K | $866.77 M |
| 07/15/2026 | $18.87 | $19.40 (2.81%) | $19.50 | $18.83 | 356.10 K | $846.69 M |
| 07/14/2026 | $19.10 | $18.81 (-1.52%) | $19.39 | $18.41 | 334.75 K | $820.94 M |
| 07/13/2026 | $19.00 | $19.29 (1.53%) | $19.68 | $18.95 | 384.54 K | $841.89 M |
| 07/10/2026 | $18.97 | $18.72 (-1.32%) | $19.15 | $18.61 | 311.10 K | $817.02 M |
| 07/09/2026 | $18.86 | $19.02 (0.85%) | $19.13 | $18.61 | 446.63 K | $830.11 M |
| 07/08/2026 | $19.96 | $18.88 (-5.41%) | $19.96 | $18.52 | 438.70 K | $824.00 M |
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