Amphastar Pharmaceuticals Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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%	236,613
Feb 10, 2026	28.75	28.92	28.49	28.57	28.57	-0.14%	182,327
Feb 9, 2026	29.08	29.20	28.37	28.61	28.61	-2.22%	284,951
Feb 6, 2026	28.61	29.46	28.61	29.26	29.26	2.20%	343,837
Feb 5, 2026	28.45	29.22	28.45	28.63	28.63	0.07%	287,455
Feb 4, 2026	28.79	29.37	28.56	28.61	28.61	1.31%	378,851
Feb 3, 2026	27.57	28.28	27.06	28.24	28.24	1.15%	506,290
Feb 2, 2026	26.36	28.13	26.34	27.92	27.92	5.40%	443,983
Jan 30, 2026	26.15	26.60	26.04	26.49	26.49	1.30%	294,463
Jan 29, 2026	26.10	26.43	25.80	26.15	26.15	0.11%	184,370
Jan 28, 2026	26.45	26.45	25.86	26.12	26.12	-0.50%	209,032
Jan 27, 2026	26.39	26.58	25.81	26.25	26.25	-1.32%	264,507
Jan 26, 2026	25.92	26.71	25.63	26.60	26.60	2.62%	316,050
Jan 23, 2026	26.03	26.37	25.81	25.92	25.92	-0.86%	269,346
Jan 22, 2026	26.25	26.92	26.10	26.15	26.15	-0.29%	231,737
Jan 21, 2026	25.96	26.59	25.93	26.22	26.22	1.04%	251,622
Jan 20, 2026	25.62	26.75	25.47	25.95	25.95	-0.46%	282,570
Jan 16, 2026	25.94	26.23	25.42	26.07	26.07	0.27%	284,511
Jan 15, 2026	27.65	27.69	25.94	26.00	26.00	-6.34%	583,625
Jan 14, 2026	28.80	29.20	27.61	27.76	27.76	-3.98%	472,419
Jan 13, 2026	29.16	29.38	28.40	28.91	28.91	-1.67%	345,642
Jan 12, 2026	28.05	29.52	27.31	29.40	29.40	5.98%	455,592
Jan 9, 2026	27.71	28.02	27.43	27.74	27.74	-	247,198
Jan 8, 2026	27.40	28.34	27.23	27.74	27.74	1.50%	302,643
Jan 7, 2026	27.83	28.28	27.15	27.33	27.33	-1.05%	342,796
Jan 6, 2026	26.53	27.75	26.51	27.62	27.62	3.37%	299,567
Jan 5, 2026	26.21	27.45	26.11	26.72	26.72	0.98%	418,742
Jan 2, 2026	26.91	26.93	26.02	26.46	26.46	-1.19%	405,969
Dec 31, 2025	27.06	27.06	26.64	26.78	26.78	-0.81%	218,279
Dec 30, 2025	26.75	27.16	26.73	27.00	27.00	0.78%	246,950
Dec 29, 2025	27.00	27.23	26.77	26.79	26.79	-1.22%	215,206
Dec 26, 2025	26.77	27.17	26.55	27.12	27.12	1.16%	229,035
Dec 24, 2025	26.45	27.12	26.44	26.81	26.81	1.36%	175,168
Dec 23, 2025	27.24	27.26	26.26	26.45	26.45	-3.18%	324,703
Dec 22, 2025	26.50	27.44	26.35	27.32	27.32	2.71%	474,461
Dec 19, 2025	26.40	26.80	26.33	26.60	26.60	0.38%	807,026
Dec 18, 2025	26.04	26.62	25.92	26.50	26.50	1.65%	340,750
Dec 17, 2025	25.60	26.52	25.47	26.07	26.07	1.80%	389,839
Dec 16, 2025	26.18	26.31	25.16	25.61	25.61	-2.66%	499,486
Dec 15, 2025	25.78	26.50	25.56	26.31	26.31	4.12%	472,889
Dec 12, 2025	26.13	26.13	25.20	25.27	25.27	-2.43%	341,410
Dec 11, 2025	25.81	25.94	25.47	25.90	25.90	0.74%	284,907
Dec 10, 2025	25.64	25.91	25.22	25.71	25.71	0.23%	483,522
Dec 9, 2025	25.97	26.39	25.56	25.65	25.65	-1.38%	414,104
Dec 8, 2025	26.81	26.85	25.95	26.01	26.01	-2.84%	300,935
Dec 5, 2025	27.15	27.47	26.69	26.77	26.77	-1.40%	323,306
Dec 4, 2025	27.58	27.84	26.97	27.15	27.15	-1.56%	404,953
Dec 3, 2025	26.86	27.82	26.75	27.58	27.58	3.41%	317,346