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Amphastar Pharmaceuticals, Inc. (AMPH)
NASDAQ: AMPH · Real-Time Price · USD
19.01
-0.52 (-2.66%)
At close: Mar 27, 2026, 4:00 PM EDT
19.03
+0.02 (0.11%)
After-hours: Mar 27, 2026, 7:59 PM EDT

Amphastar Pharmaceuticals Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Mar 27, 202619.3719.6418.9219.0119.01-2.66%343,413
Mar 26, 202619.5019.8018.9819.5319.53-0.20%363,470
Mar 25, 202619.4519.9619.3919.5719.571.77%317,553
Mar 24, 202619.1019.5718.9819.2319.23-367,779
Mar 23, 202620.0420.0819.2319.2319.23-1.38%414,150
Mar 20, 202619.5619.7619.1519.5019.50-0.20%1,121,726
Mar 19, 202619.1019.8219.0619.5419.542.84%582,225
Mar 18, 202619.2119.4718.9719.0019.00-2.61%650,422
Mar 17, 202619.4820.0019.4819.5119.510.52%635,569
Mar 16, 202618.9319.4618.6519.4119.416.77%737,687
Mar 13, 202618.2318.4617.8118.1818.180.03%604,648
Mar 12, 202618.5818.5817.0318.1818.18-3.17%901,614
Mar 11, 202618.9119.5018.5218.7718.77-0.74%547,744
Mar 10, 202619.2119.5718.8418.9118.91-1.56%527,104
Mar 9, 202618.9719.3718.5219.2119.21-0.67%629,893
Mar 6, 202620.0520.0818.9419.3419.34-5.38%753,336
Mar 5, 202619.6720.6019.5420.4420.442.40%725,948
Mar 4, 202619.9720.2019.5619.9619.960.66%594,582
Mar 3, 202620.3521.0719.8119.8319.83-5.62%740,556
Mar 2, 202620.3021.1419.9521.0121.013.86%1,261,232
Feb 27, 202622.4423.2719.8320.2320.23-23.63%1,965,786
Feb 26, 202628.0028.1726.2726.4926.49-5.29%816,455
Feb 25, 202627.7327.9927.0327.9727.971.08%415,986
Feb 24, 202627.6528.3727.4227.6727.670.44%478,146
Feb 23, 202628.4228.7527.1927.5527.55-3.43%496,697
Feb 20, 202628.5828.9828.0328.5328.53-0.04%508,412
Feb 19, 202628.5628.7128.4228.5428.54-0.42%340,673
Feb 18, 202628.4529.1628.3628.6628.660.74%325,939
Feb 17, 202628.6529.2328.3928.4528.45-0.18%316,867
Feb 13, 202627.8229.0027.7628.5028.503.45%268,689
Feb 12, 202628.6228.6227.2427.5527.55-3.64%437,541
Feb 11, 202628.6229.0928.4828.5928.590.07%236,616
Feb 10, 202628.7528.9228.4928.5728.57-0.14%182,574
Feb 9, 202629.0829.2028.3728.6128.61-2.22%285,022
Feb 6, 202628.6129.4628.6129.2629.262.20%343,842
Feb 5, 202628.4529.2228.4528.6328.630.07%288,034
Feb 4, 202628.7929.3728.5628.6128.611.31%378,851
Feb 3, 202627.5728.2827.0628.2428.241.15%506,290
Feb 2, 202626.3628.1326.3427.9227.925.40%444,060
Jan 30, 202626.1526.6026.0426.4926.491.30%294,470
Jan 29, 202626.1026.4325.8026.1526.150.11%184,370
Jan 28, 202626.4526.4525.8626.1226.12-0.50%209,032
Jan 27, 202626.3926.5825.8126.2526.25-1.32%264,507
Jan 26, 202625.9226.7125.6326.6026.602.62%316,150
Jan 23, 202626.0326.3725.8125.9225.92-0.86%269,462
Jan 22, 202626.2526.9226.1026.1526.15-0.29%233,271
Jan 21, 202625.9626.5925.9326.2226.221.04%251,623
Jan 20, 202625.6226.7525.4725.9525.95-0.46%282,605
Jan 16, 202625.9426.2325.4226.0726.070.27%286,949
Jan 15, 202627.6527.6925.9426.0026.00-6.34%584,060