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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

DateOpenHighLowCloseAdj. CloseChangeVolume
Oct 29, 202524.0124.6523.9124.60-1.74%121,179
Oct 28, 202523.9224.4523.7724.1824.180.58%264,331
Oct 27, 202524.3824.5523.9824.0424.04-1.96%319,227
Oct 24, 202524.7224.8924.4624.5224.52-0.81%220,779
Oct 23, 202524.5924.8724.2424.7224.720.82%309,413
Oct 22, 202524.1424.8323.9724.5224.521.07%582,786
Oct 21, 202523.7324.3823.7324.2624.262.23%335,175
Oct 20, 202523.7824.1023.6723.7323.73-0.21%255,762
Oct 17, 202523.0923.8923.0923.7823.782.41%321,594
Oct 16, 202523.1323.6122.9423.2223.220.35%449,608
Oct 15, 202523.8524.2022.9423.1423.14-3.02%504,313
Oct 14, 202523.3323.9823.3323.8623.861.49%282,166
Oct 13, 202523.6924.2123.4223.5123.51-0.51%324,141
Oct 10, 202525.0125.0223.2023.6323.63-5.37%607,448
Oct 9, 202525.9226.1124.6824.9724.97-3.89%441,557
Oct 8, 202526.0026.3225.5725.9825.980.58%250,038
Oct 7, 202526.4526.6825.8025.8325.83-2.82%390,489
Oct 6, 202526.8227.0726.5326.5826.58-0.64%241,845
Oct 3, 202526.5127.3126.4626.7526.750.87%331,099
Oct 2, 202526.8627.0326.4626.5226.52-1.74%288,366
Oct 1, 202526.7427.3926.7426.9926.991.28%337,099
Sep 30, 202526.9327.2726.4726.6526.65-1.00%392,172
Sep 29, 202526.8727.2126.3526.9226.920.26%513,361
Sep 26, 202526.6226.9226.3426.8526.851.86%291,264
Sep 25, 202526.8826.8925.9526.3626.36-1.90%565,989
Sep 24, 202527.4327.6226.7826.8726.87-1.97%302,731
Sep 23, 202527.8828.2227.2127.4127.41-1.72%323,932
Sep 22, 202527.8828.2427.6127.8927.890.90%424,678
Sep 19, 202527.3727.7726.8727.6427.640.73%1,384,028
Sep 18, 202527.0927.7026.9027.4427.441.70%458,903
Sep 17, 202527.1327.9026.5726.9826.98-0.07%920,934
Sep 16, 202527.3027.5126.8727.0027.00-0.99%497,864
Sep 15, 202528.0728.3927.2327.2727.27-2.82%422,797
Sep 12, 202528.8628.8627.9128.0628.06-2.16%273,671
Sep 11, 202528.3628.8928.3628.6828.680.99%422,254
Sep 10, 202529.1829.2628.3428.4028.40-3.17%309,841
Sep 9, 202529.2629.4328.9929.3329.330.24%379,382
Sep 8, 202529.3029.4128.4929.2629.26-0.54%385,699
Sep 5, 202529.0829.7828.9829.4229.420.79%414,943
Sep 4, 202529.3929.5928.8829.1929.19-0.68%553,530
Sep 3, 202530.4931.1029.2929.3929.39-4.61%566,946
Sep 2, 202530.8631.2630.4430.8130.810.62%414,770
Aug 29, 202530.2130.8130.1830.6230.621.19%290,925
Aug 28, 202530.5030.5629.8630.2630.26-0.75%316,721
Aug 27, 202530.1030.9530.1030.4930.490.49%326,146
Aug 26, 202529.9830.8029.9330.3430.341.71%408,475
Aug 25, 202530.5330.5529.4729.8329.83-2.20%374,384
Aug 22, 202529.9830.9029.9830.5030.502.83%494,915
Aug 21, 202529.5730.4229.4329.6629.660.14%491,388
Aug 20, 202530.2130.3929.4229.6229.62-2.34%434,164