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Amphastar Pharmaceuticals, Inc. (AMPH)
NASDAQ: AMPH · Real-Time Price · USD
27.00
-0.27 (-0.99%)
At close: Sep 16, 2025, 4:00 PM EDT
27.00
0.00 (0.00%)
After-hours: Sep 16, 2025, 4:20 PM EDT

Amphastar Pharmaceuticals Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
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
Aug 19, 202529.9330.9929.8530.3330.331.92%527,820
Aug 18, 202529.8330.6529.5829.7629.76-0.23%433,187
Aug 15, 202530.2130.6329.8229.8329.83-1.26%651,993
Aug 14, 202530.0330.6329.6430.2130.21-0.89%464,377
Aug 13, 202530.4431.2330.0030.4830.480.43%1,016,810
Aug 12, 202528.1830.6328.1430.3530.3510.93%1,601,991
Aug 11, 202524.7327.4124.6927.3627.3614.91%1,816,531
Aug 8, 202522.2924.7022.0723.8123.8110.13%1,005,009
Aug 7, 202521.1521.7420.7021.6221.623.84%705,613
Aug 6, 202521.4221.6820.7920.8220.82-2.89%414,589
Aug 5, 202521.4421.5721.1821.4421.440.19%388,966
Aug 4, 202521.1921.4320.8821.4021.400.90%463,650
Aug 1, 202520.8621.2520.3921.2121.211.24%440,154
Jul 31, 202521.0621.3320.7720.9520.95-1.83%545,003
Jul 30, 202521.7021.8421.2321.3421.34-1.52%304,733
Jul 29, 202522.1022.1321.6521.6721.67-2.56%358,966
Jul 28, 202522.3722.9022.0622.2422.24-0.58%457,570
Jul 25, 202522.4622.5022.1322.3722.37-0.62%329,130
Jul 24, 202522.4822.6822.3922.5122.51-0.53%320,091
Jul 23, 202521.5322.7021.5122.6322.636.00%518,064
Jul 22, 202521.2921.7021.0821.3521.350.76%469,787
Jul 21, 202520.7021.2220.6421.1921.192.76%536,090
Jul 18, 202521.9222.0020.4320.6220.62-4.98%430,269
Jul 17, 202521.2021.9221.1921.7021.702.02%407,650
Jul 16, 202521.4121.6521.0921.2721.270.42%675,721
Jul 15, 202522.1122.3121.1621.1821.18-3.51%504,519
Jul 14, 202521.7122.1221.5021.9521.951.34%504,960
Jul 11, 202522.0022.1421.4821.6621.66-2.48%449,086
Jul 10, 202522.4422.8322.2022.2122.21-1.02%464,802
Jul 9, 202522.7822.9422.2922.4422.44-0.71%371,461
Jul 8, 202522.8623.3822.4322.6022.60-1.14%657,360