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Amphastar Pharmaceuticals, Inc. (AMPH)
NASDAQ: AMPH · Real-Time Price · USD
29.37
+0.50 (1.73%)
At close: Nov 13, 2026, 4:00 PM EST
29.90
+0.53 (1.80%)
After-hours: Nov 13, 2026, 5:31 PM EST

Amphastar Pharmaceuticals Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Nov 13, 202629.0529.7328.8429.3729.371.73%380,762
Nov 12, 202628.7729.0228.5328.8728.870.94%374,915
Nov 11, 202628.8729.3028.5028.6028.60-1.58%497,666
Nov 10, 202628.7529.4028.5129.0629.06-1.09%484,892
Nov 9, 202628.7429.7028.5029.3829.383.12%635,804
Nov 6, 202629.4431.0027.8028.4928.493.00%826,255
Nov 5, 202628.3129.2127.4327.6627.66-1.28%607,331
Nov 4, 202627.3728.5727.0928.0228.023.32%644,913
Nov 3, 202627.0427.3926.8527.1227.120.33%550,213
Nov 2, 202627.7227.8026.6927.0327.03-2.49%497,703
Oct 30, 202627.1227.8026.7627.7227.722.93%664,507
Oct 29, 202626.8427.0026.4526.9326.932.28%371,414
Oct 28, 202625.3626.3625.3626.3326.332.97%397,267
Oct 27, 202625.3825.7025.2925.5725.570.39%323,927
Oct 26, 202625.2725.6525.2225.4725.471.31%225,242
Oct 23, 202625.9125.9124.6225.1425.14-3.46%483,121
Oct 22, 202626.2526.5025.9226.0426.04-0.61%315,091
Oct 21, 202625.6926.3525.5126.2026.201.00%390,205
Oct 20, 202626.2426.6125.8225.9425.94-0.77%361,336
Oct 19, 202625.6326.3125.6326.1426.141.04%299,510
Oct 16, 202626.6126.6125.5225.8725.87-2.08%351,983
Oct 15, 202626.3827.1026.1326.4226.421.30%352,334
Oct 14, 202625.8926.5725.8926.0826.080.12%364,651
Oct 13, 202626.9127.0026.0326.0526.05-2.65%326,542
Oct 12, 202626.6226.8626.5126.7626.760.53%362,817
Oct 9, 202625.7326.7925.6526.6226.623.14%269,255
Oct 8, 202625.3926.1425.1025.8125.811.06%422,785
Oct 7, 202625.9126.1725.2925.5425.54-1.43%774,800
Oct 6, 202625.5426.1325.0325.9125.912.13%466,112
Oct 5, 202625.4325.7025.1725.3725.37-0.24%453,634
Oct 2, 202625.4625.5525.0625.4325.430.32%372,329
Oct 1, 202625.6026.0225.3025.3525.35-1.78%528,692
Sep 30, 202626.7326.7925.7725.8125.81-3.26%504,650
Sep 29, 202627.5927.6426.5226.6826.68-2.59%626,940
Sep 28, 202625.9927.8025.9627.3927.394.82%747,864
Sep 25, 202626.2526.6325.6626.1326.13-0.53%370,895
Sep 24, 202624.8126.3124.6526.2726.275.25%568,856
Sep 23, 202624.3925.1224.2024.9624.962.63%504,549
Sep 22, 202624.6024.8324.0024.3224.32-0.65%496,729
Sep 21, 202623.5425.4123.4524.4824.483.64%563,475
Sep 18, 202623.6923.9923.5123.6223.62-0.84%1,450,179
Sep 17, 202624.0824.1823.5023.8223.82-0.54%451,995
Sep 16, 202623.6424.3923.4923.9523.951.31%502,992
Sep 15, 202623.7523.9423.5623.6423.64-1.13%347,395
Sep 14, 202623.8424.2823.5623.9123.910.55%471,954
Sep 11, 202623.6523.8023.2423.7823.781.02%400,728
Sep 10, 202623.0023.6922.7623.5423.542.17%495,998
Sep 9, 202622.8423.0722.5823.0423.040.48%343,406
Sep 8, 202622.8223.1422.3022.9322.93-1.08%451,310
Sep 4, 202623.4723.7423.0723.1823.18-2.77%626,116