Amphastar Pharmaceuticals Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Apr 22, 2026	21.40	21.59	20.77	20.99	20.99	-1.04%	410,626
Apr 21, 2026	22.38	22.66	21.10	21.21	21.21	-7.46%	684,104
Apr 20, 2026	22.67	23.26	22.54	22.92	22.92	0.17%	539,831
Apr 17, 2026	22.18	23.00	21.98	22.88	22.88	4.91%	537,816
Apr 16, 2026	21.67	22.02	21.41	21.81	21.81	0.60%	361,306
Apr 15, 2026	21.38	21.76	21.19	21.68	21.68	1.40%	389,107
Apr 14, 2026	21.36	21.70	21.12	21.38	21.38	0.09%	343,451
Apr 13, 2026	20.17	21.48	20.17	21.36	21.36	4.86%	577,853
Apr 10, 2026	20.98	21.10	20.14	20.37	20.37	-2.40%	354,456
Apr 9, 2026	20.32	21.19	20.32	20.87	20.87	2.30%	519,311
Apr 8, 2026	20.68	21.07	20.18	20.40	20.40	-0.87%	613,453
Apr 7, 2026	20.39	20.81	20.26	20.58	20.58	-	350,978
Apr 6, 2026	20.45	20.73	20.04	20.58	20.58	0.64%	344,067
Apr 2, 2026	19.95	20.66	19.88	20.45	20.45	1.04%	390,454
Apr 1, 2026	19.74	20.31	19.68	20.24	20.24	3.32%	676,874
Mar 31, 2026	19.53	20.00	19.27	19.59	19.59	1.93%	534,119
Mar 30, 2026	19.15	19.67	19.07	19.22	19.22	1.10%	410,715
Mar 27, 2026	19.37	19.64	18.92	19.01	19.01	-2.66%	343,413
Mar 26, 2026	19.50	19.80	18.98	19.53	19.53	-0.20%	363,470
Mar 25, 2026	19.45	19.96	19.39	19.57	19.57	1.77%	317,553
Mar 24, 2026	19.10	19.57	18.98	19.23	19.23	-	367,779
Mar 23, 2026	20.04	20.08	19.23	19.23	19.23	-1.38%	414,150
Mar 20, 2026	19.56	19.76	19.15	19.50	19.50	-0.20%	1,121,726
Mar 19, 2026	19.10	19.82	19.06	19.54	19.54	2.84%	582,225
Mar 18, 2026	19.21	19.47	18.97	19.00	19.00	-2.61%	650,422
Mar 17, 2026	19.48	20.00	19.48	19.51	19.51	0.52%	635,569
Mar 16, 2026	18.93	19.46	18.65	19.41	19.41	6.77%	737,687
Mar 13, 2026	18.23	18.46	17.81	18.18	18.18	0.03%	604,648
Mar 12, 2026	18.58	18.58	17.03	18.18	18.18	-3.17%	901,614
Mar 11, 2026	18.91	19.50	18.52	18.77	18.77	-0.74%	547,744
Mar 10, 2026	19.21	19.57	18.84	18.91	18.91	-1.56%	527,104
Mar 9, 2026	18.97	19.37	18.52	19.21	19.21	-0.67%	629,893
Mar 6, 2026	20.05	20.08	18.94	19.34	19.34	-5.38%	753,336
Mar 5, 2026	19.67	20.60	19.54	20.44	20.44	2.40%	725,948
Mar 4, 2026	19.97	20.20	19.56	19.96	19.96	0.66%	594,582
Mar 3, 2026	20.35	21.07	19.81	19.83	19.83	-5.62%	740,556
Mar 2, 2026	20.30	21.14	19.95	21.01	21.01	3.86%	1,261,232
Feb 27, 2026	22.44	23.27	19.83	20.23	20.23	-23.63%	1,965,786
Feb 26, 2026	28.00	28.17	26.27	26.49	26.49	-5.29%	816,455
Feb 25, 2026	27.73	27.99	27.03	27.97	27.97	1.08%	415,986
Feb 24, 2026	27.65	28.37	27.42	27.67	27.67	0.44%	478,146
Feb 23, 2026	28.42	28.75	27.19	27.55	27.55	-3.43%	496,697
Feb 20, 2026	28.58	28.98	28.03	28.53	28.53	-0.04%	508,412
Feb 19, 2026	28.56	28.71	28.42	28.54	28.54	-0.42%	340,673
Feb 18, 2026	28.45	29.16	28.36	28.66	28.66	0.74%	325,939
Feb 17, 2026	28.65	29.23	28.39	28.45	28.45	-0.18%	316,867
Feb 13, 2026	27.82	29.00	27.76	28.50	28.50	3.45%	268,689
Feb 12, 2026	28.62	28.62	27.24	27.55	27.55	-3.64%	437,541
Feb 11, 2026	28.62	29.09	28.48	28.59	28.59	0.07%	236,616
Feb 10, 2026	28.75	28.92	28.49	28.57	28.57	-0.14%	182,574