Amphastar Pharmaceuticals Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Dec 20, 2024	39.31	40.74	38.96	39.14	39.14	-0.63%	2,484,940
Dec 19, 2024	39.59	40.26	38.81	39.39	39.39	-0.15%	669,474
Dec 18, 2024	40.77	41.13	38.78	39.45	39.45	-3.43%	984,582
Dec 17, 2024	40.43	41.84	40.37	40.85	40.85	0.02%	524,810
Dec 16, 2024	42.13	42.49	40.71	40.84	40.84	-3.31%	665,907
Dec 13, 2024	44.44	45.39	41.82	42.24	42.24	-5.08%	831,517
Dec 12, 2024	43.56	45.00	43.51	44.50	44.50	2.13%	632,739
Dec 11, 2024	43.92	44.37	43.55	43.57	43.57	-0.16%	328,229
Dec 10, 2024	44.00	44.16	43.60	43.64	43.64	-0.43%	388,212
Dec 9, 2024	43.96	44.48	43.74	43.83	43.83	0.07%	435,655
Dec 6, 2024	43.79	44.27	43.47	43.80	43.80	0.46%	267,467
Dec 5, 2024	44.27	44.27	43.34	43.60	43.60	-1.58%	699,900
Dec 4, 2024	45.02	45.24	44.26	44.30	44.30	-1.38%	401,355
Dec 3, 2024	45.84	46.11	44.71	44.92	44.92	-2.09%	308,292
Dec 2, 2024	44.93	46.09	44.40	45.88	45.88	1.53%	606,763
Nov 29, 2024	45.21	45.55	44.88	45.19	45.19	-0.04%	190,808
Nov 27, 2024	44.23	45.71	44.23	45.21	45.21	2.24%	439,684
Nov 26, 2024	44.45	44.88	44.16	44.22	44.22	-0.94%	283,742
Nov 25, 2024	45.71	46.43	44.42	44.64	44.64	-1.80%	666,191
Nov 22, 2024	45.48	45.65	44.95	45.46	45.46	2.04%	410,772
Nov 21, 2024	44.22	44.71	43.71	44.55	44.55	1.04%	364,171
Nov 20, 2024	43.71	44.54	43.09	44.09	44.09	1.08%	607,136
Nov 19, 2024	43.80	44.27	43.21	43.62	43.62	-1.22%	432,586
Nov 18, 2024	44.39	44.86	44.00	44.16	44.16	-1.01%	343,046
Nov 15, 2024	45.07	45.39	43.88	44.61	44.61	-1.00%	408,672
Nov 14, 2024	45.48	45.91	44.71	45.06	45.06	-0.92%	359,021
Nov 13, 2024	47.51	47.99	45.39	45.48	45.48	-4.67%	421,188
Nov 12, 2024	48.38	49.12	47.48	47.71	47.71	-1.77%	364,171
Nov 11, 2024	48.52	49.17	47.37	48.57	48.57	0.54%	382,477
Nov 8, 2024	46.18	49.53	46.03	48.31	48.31	4.82%	626,887
Nov 7, 2024	47.94	49.45	46.03	46.09	46.09	-13.69%	1,367,362
Nov 6, 2024	52.05	53.96	52.05	53.40	53.40	3.57%	611,837
Nov 5, 2024	50.59	51.72	50.33	51.56	51.56	1.92%	199,229
Nov 4, 2024	50.72	51.53	50.26	50.59	50.59	-0.28%	376,573
Nov 1, 2024	50.75	51.23	50.25	50.73	50.73	0.40%	181,298
Oct 31, 2024	50.39	51.35	50.04	50.53	50.53	-0.49%	266,346
Oct 30, 2024	50.42	51.57	50.42	50.78	50.78	-0.72%	289,255
Oct 29, 2024	51.29	51.36	50.55	51.15	51.15	-0.51%	180,767
Oct 28, 2024	50.57	51.84	50.53	51.41	51.41	2.23%	338,028
Oct 25, 2024	50.00	50.55	49.80	50.29	50.29	1.33%	179,571
Oct 24, 2024	49.68	51.36	49.38	49.63	49.63	-0.40%	465,917
Oct 23, 2024	50.40	50.63	49.47	49.83	49.83	-1.09%	314,643
Oct 22, 2024	50.59	51.02	50.20	50.38	50.38	-0.87%	188,623
Oct 21, 2024	50.83	51.42	50.08	50.82	50.82	-0.04%	208,996
Oct 18, 2024	49.87	51.44	49.83	50.84	50.84	2.27%	245,274
Oct 17, 2024	51.27	51.35	49.48	49.71	49.71	-2.20%	272,772
Oct 16, 2024	49.60	50.85	49.59	50.83	50.83	3.08%	283,418
Oct 15, 2024	49.17	50.50	49.17	49.31	49.31	0.04%	368,001
Oct 14, 2024	47.76	49.32	47.63	49.29	49.29	3.62%	284,225
Oct 11, 2024	46.27	47.61	46.27	47.57	47.57	2.77%	302,018
Oct 10, 2024	46.00	46.56	45.55	46.29	46.29	-0.06%	295,129
Oct 9, 2024	46.38	47.82	46.17	46.32	46.32	0.09%	297,781
Oct 8, 2024	46.97	47.31	46.19	46.28	46.28	-1.17%	212,122
Oct 7, 2024	46.51	46.93	46.21	46.83	46.83	0.24%	313,123
Oct 4, 2024	46.63	47.39	46.39	46.72	46.72	0.86%	167,665
Oct 3, 2024	46.37	46.82	45.50	46.32	46.32	-0.39%	228,268
Oct 2, 2024	48.30	48.48	46.35	46.50	46.50	-3.83%	348,437
Oct 1, 2024	48.55	48.98	47.74	48.35	48.35	-0.37%	233,283
Sep 30, 2024	48.06	49.22	48.00	48.53	48.53	1.06%	266,892
Sep 27, 2024	48.28	48.98	47.93	48.02	48.02	0.29%	202,884
Sep 26, 2024	47.00	47.94	46.93	47.88	47.88	2.48%	207,700
Sep 25, 2024	47.43	47.77	46.58	46.72	46.72	-1.41%	267,518
Sep 24, 2024	48.69	48.95	47.21	47.39	47.39	-2.51%	256,437
Sep 23, 2024	49.20	49.61	48.46	48.61	48.61	-1.16%	221,343
Sep 20, 2024	50.46	50.62	48.94	49.18	49.18	-1.82%	990,071
Sep 19, 2024	50.61	50.61	49.24	50.09	50.09	0.62%	342,761
Sep 18, 2024	48.59	50.23	48.30	49.78	49.78	2.34%	565,159
Sep 17, 2024	49.28	49.28	48.00	48.64	48.64	0.54%	290,269
Sep 16, 2024	48.54	48.79	47.60	48.38	48.38	0.60%	401,970
Sep 13, 2024	47.23	48.34	47.04	48.09	48.09	3.37%	645,141
Sep 12, 2024	45.19	46.75	44.75	46.52	46.52	3.22%	652,921
Sep 11, 2024	44.17	45.16	43.67	45.07	45.07	1.60%	313,602
Sep 10, 2024	44.72	44.99	43.60	44.36	44.36	-0.40%	277,547
Sep 9, 2024	45.09	45.76	44.53	44.54	44.54	-1.85%	258,549
Sep 6, 2024	45.45	46.03	45.17	45.38	45.38	-0.09%	239,076
Sep 5, 2024	46.98	47.24	45.21	45.42	45.42	-3.16%	362,539
Sep 4, 2024	46.73	47.09	46.34	46.90	46.90	-0.17%	219,183
Sep 3, 2024	48.32	48.59	46.95	46.98	46.98	-3.61%	409,397
Aug 30, 2024	49.10	49.30	48.25	48.74	48.74	-0.25%	205,162
Aug 29, 2024	48.63	49.22	48.63	48.86	48.86	0.62%	237,574
Aug 28, 2024	48.10	48.66	48.00	48.56	48.56	0.17%	227,972
Aug 27, 2024	48.39	48.55	47.99	48.48	48.48	0.69%	248,761
Aug 26, 2024	48.00	48.70	47.65	48.15	48.15	0.42%	359,807
Aug 23, 2024	47.43	48.31	47.43	47.95	47.95	1.52%	358,815
Aug 22, 2024	46.98	47.49	46.80	47.23	47.23	0.77%	321,268
Aug 21, 2024	46.34	47.47	46.34	46.87	46.87	1.85%	344,192
Aug 20, 2024	46.86	47.60	45.87	46.02	46.02	-1.65%	375,330
Aug 19, 2024	45.01	46.87	44.97	46.79	46.79	4.07%	491,497
Aug 16, 2024	45.29	45.32	43.96	44.96	44.96	-0.79%	387,833
Aug 15, 2024	43.02	45.35	42.82	45.32	45.32	6.79%	525,127
Aug 14, 2024	43.36	43.36	42.31	42.44	42.44	-2.57%	251,374
Aug 13, 2024	43.14	43.74	42.85	43.56	43.56	0.72%	394,377
Aug 12, 2024	43.04	43.80	42.81	43.25	43.25	0.93%	278,415
Aug 9, 2024	43.99	44.36	42.82	42.85	42.85	-2.75%	365,605
Aug 8, 2024	42.49	44.76	40.22	44.06	44.06	13.29%	789,171
Aug 7, 2024	39.91	40.00	38.42	38.89	38.89	-1.29%	470,425
Aug 6, 2024	40.57	40.75	39.20	39.40	39.40	-2.50%	522,718
Aug 5, 2024	40.14	40.71	39.47	40.41	40.41	-2.79%	474,047
Aug 2, 2024	41.61	42.00	41.21	41.57	41.57	-2.07%	397,105
Aug 1, 2024	43.50	44.18	42.22	42.45	42.45	-2.46%	415,442