5 DAY PERFORMANCE
+1.11%
1 MONTH PERFORMANCE
-10.07%
3 MONTH PERFORMANCE
-32.60%
6 MONTH PERFORMANCE
-27.15%
YEAR-TO-DATE PERFORMANCE
-28.27%
1 YEAR PERFORMANCE
-19.56%
Amphastar Pharmaceuticals Inc Stock Chart
Share Price History
| Date | Opening Price | Closing Price | High | Low | Volume | Market Capitalization |
|---|---|---|---|---|---|---|
| 05/13/2026 | $17.50 | $18.32 (4.69%) | $18.57 | $17.43 | 971.19 K | $814.66 M |
| 05/12/2026 | $18.41 | $17.50 (-4.94%) | $18.58 | $17.26 | 1.22 M | $793.14 M |
| 05/11/2026 | $19.13 | $18.45 (-3.55%) | $19.41 | $18.33 | 1.36 M | $836.19 M |
| 05/08/2026 | $18.58 | $19.00 (2.26%) | $19.52 | $18.28 | 1.98 M | $861.12 M |
| 05/07/2026 | $24.01 | $24.03 (0.08%) | $24.35 | $23.87 | 373.52 K | $1.09 B |
| 05/06/2026 | $23.50 | $23.90 (1.7%) | $24.15 | $23.50 | 392.80 K | $1.08 B |
| 05/05/2026 | $22.85 | $23.39 (2.36%) | $23.46 | $22.75 | 366.95 K | $1.06 B |
| 05/04/2026 | $21.82 | $22.74 (4.22%) | $23.22 | $21.72 | 487.14 K | $1.03 B |
| 05/01/2026 | $21.98 | $21.88 (-0.45%) | $22.26 | $21.64 | 353.20 K | $1.00 B |
| 04/30/2026 | $21.63 | $21.96 (1.53%) | $22.36 | $21.57 | 407.24 K | $1.01 B |
| 04/29/2026 | $21.50 | $21.63 (0.6%) | $21.86 | $21.48 | 268.70 K | $992.97 M |
| 04/28/2026 | $21.71 | $21.82 (0.51%) | $22.04 | $21.56 | 281.23 K | $1.00 B |
| 04/27/2026 | $21.47 | $21.65 (0.84%) | $22.06 | $21.46 | 329.61 K | $993.89 M |
| 04/24/2026 | $21.05 | $21.41 (1.71%) | $21.60 | $20.77 | 429.70 K | $982.87 M |
| 04/23/2026 | $20.99 | $21.01 (0.1%) | $21.23 | $20.77 | 302.60 K | $964.51 M |
| 04/22/2026 | $21.40 | $20.99 (-1.92%) | $21.59 | $20.77 | 410.80 K | $963.59 M |
| 04/21/2026 | $22.38 | $21.21 (-5.23%) | $22.66 | $21.10 | 684.20 K | $973.69 M |
| 04/20/2026 | $22.67 | $22.92 (1.1%) | $23.26 | $22.54 | 542.35 K | $1.05 B |
| 04/17/2026 | $22.18 | $22.88 (3.16%) | $23.00 | $21.98 | 537.83 K | $1.05 B |
| 04/16/2026 | $21.67 | $21.81 (0.65%) | $22.02 | $21.41 | 361.31 K | $1.00 B |
| 04/15/2026 | $21.38 | $21.68 (1.4%) | $21.76 | $21.19 | 389.40 K | $995.26 M |
| 04/14/2026 | $21.36 | $21.38 (0.09%) | $21.70 | $21.12 | 343.50 K | $981.49 M |
| 04/13/2026 | $20.17 | $21.36 (5.9%) | $21.48 | $20.17 | 577.90 K | $980.57 M |
| 04/10/2026 | $20.98 | $20.37 (-2.91%) | $21.10 | $20.14 | 354.50 K | $935.13 M |
| 04/09/2026 | $20.32 | $20.87 (2.71%) | $21.19 | $20.32 | 519.32 K | $958.08 M |
| 04/08/2026 | $20.68 | $20.40 (-1.35%) | $21.07 | $20.18 | 613.50 K | $936.50 M |
| 04/07/2026 | $20.39 | $20.58 (0.93%) | $20.81 | $20.26 | 351.50 K | $944.77 M |
| 04/06/2026 | $20.45 | $20.58 (0.64%) | $20.73 | $20.04 | 344.10 K | $944.77 M |
| 04/02/2026 | $19.95 | $20.45 (2.51%) | $20.66 | $19.88 | 390.50 K | $938.80 M |
| 04/01/2026 | $19.74 | $20.24 (2.53%) | $20.31 | $19.68 | 677.40 K | $929.16 M |
| 03/31/2026 | $19.53 | $19.59 (0.31%) | $20.00 | $19.27 | 534.43 K | $899.32 M |
| 03/30/2026 | $19.15 | $19.22 (0.37%) | $19.67 | $19.07 | 410.72 K | $882.33 M |
| 03/27/2026 | $19.37 | $19.01 (-1.86%) | $19.64 | $18.92 | 346.02 K | $872.69 M |
| 03/26/2026 | $19.50 | $19.53 (0.15%) | $19.80 | $18.98 | 363.50 K | $896.56 M |
| 03/25/2026 | $19.45 | $19.57 (0.62%) | $19.96 | $19.39 | 317.60 K | $898.40 M |
| 03/24/2026 | $19.10 | $19.23 (0.68%) | $19.57 | $18.98 | 367.80 K | $882.79 M |
| 03/23/2026 | $20.04 | $19.23 (-4.04%) | $20.08 | $19.23 | 414.90 K | $882.79 M |
| 03/20/2026 | $19.56 | $19.50 (-0.31%) | $19.76 | $19.15 | 1.13 M | $895.19 M |
| 03/19/2026 | $19.10 | $19.54 (2.3%) | $19.82 | $19.06 | 583.12 K | $897.02 M |
| 03/18/2026 | $19.21 | $19.00 (-1.09%) | $19.47 | $18.97 | 650.43 K | $872.23 M |
| 03/17/2026 | $19.48 | $19.51 (0.15%) | $20.00 | $19.48 | 635.60 K | $895.65 M |
| 03/16/2026 | $18.93 | $19.41 (2.54%) | $19.46 | $18.65 | 738.00 K | $891.05 M |
| 03/13/2026 | $18.23 | $18.18 (-0.27%) | $18.46 | $17.81 | 604.65 K | $834.59 M |
| 03/12/2026 | $18.58 | $18.18 (-2.15%) | $18.58 | $17.03 | 901.70 K | $834.59 M |
| 03/11/2026 | $18.91 | $18.77 (-0.74%) | $19.50 | $18.52 | 548.30 K | $861.67 M |
| 03/10/2026 | $19.21 | $18.91 (-1.56%) | $19.57 | $18.84 | 527.20 K | $868.10 M |
| 03/09/2026 | $18.97 | $19.21 (1.27%) | $19.37 | $18.52 | 687.80 K | $881.87 M |
| 03/06/2026 | $20.05 | $19.34 (-3.54%) | $20.08 | $18.93 | 753.76 K | $887.84 M |
| 03/05/2026 | $19.67 | $20.44 (3.91%) | $20.60 | $19.54 | 726.36 K | $938.34 M |
| 03/04/2026 | $19.97 | $19.96 (-0.05%) | $20.20 | $19.56 | 595.00 K | $916.30 M |
| 03/03/2026 | $20.35 | $19.83 (-2.56%) | $21.07 | $19.81 | 740.83 K | $910.34 M |
| 03/02/2026 | $20.30 | $21.01 (3.5%) | $21.14 | $19.95 | 1.26 M | $964.51 M |
| 02/27/2026 | $22.44 | $20.23 (-9.85%) | $23.27 | $19.83 | 1.97 M | $928.70 M |
| 02/26/2026 | $28.00 | $26.49 (-5.39%) | $28.17 | $26.27 | 816.50 K | $1.22 B |
| 02/25/2026 | $27.73 | $27.97 (0.87%) | $27.99 | $27.03 | 416.00 K | $1.28 B |
| 02/24/2026 | $27.65 | $27.67 (0.07%) | $28.37 | $27.42 | 478.15 K | $1.27 B |
| 02/23/2026 | $28.42 | $27.55 (-3.06%) | $28.75 | $27.19 | 496.70 K | $1.26 B |
| 02/20/2026 | $28.58 | $28.53 (-0.17%) | $28.98 | $28.03 | 508.41 K | $1.33 B |
| 02/19/2026 | $28.56 | $28.54 (-0.07%) | $28.71 | $28.42 | 340.70 K | $1.33 B |
| 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 |
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