Amphastar Pharmaceuticals, Inc. - AMPH - Stock Historical Data & Price

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
October 17, 2025	23.09	23.78	23.78	23.89	23.09	321,594
October 16, 2025	23.13	23.22	23.22	23.61	22.94	449,608
October 15, 2025	23.85	23.14	23.14	24.2	22.94	504,313
October 14, 2025	23.33	23.86	23.86	23.98	23.33	282,200
October 13, 2025	23.69	23.51	23.51	24.21	23.42	324,141
October 10, 2025	25.01	23.63	23.63	25.02	23.2	607,448
October 09, 2025	25.92	24.97	24.97	26.11	24.68	441,600
October 08, 2025	26	25.98	25.98	26.32	25.57	250,038
October 07, 2025	26.45	25.83	25.83	26.68	25.8	390,500
October 06, 2025	26.82	26.58	26.58	27.07	26.53	241,845
October 03, 2025	26.51	26.75	26.75	27.31	26.46	331,100
October 02, 2025	26.86	26.52	26.52	27.03	26.46	288,400
October 01, 2025	26.74	26.99	26.99	27.39	26.74	337,100
September 30, 2025	26.93	26.65	26.65	27.27	26.47	392,200
September 29, 2025	26.87	26.92	26.92	27.21	26.35	513,400
September 26, 2025	26.62	26.85	26.85	26.92	26.34	291,300
September 25, 2025	26.88	26.36	26.36	26.89	25.95	566,000
September 24, 2025	27.43	26.87	26.87	27.62	26.78	302,731
September 23, 2025	27.88	27.41	27.41	28.22	27.21	323,932
September 22, 2025	27.88	27.89	27.89	28.24	27.61	424,700
September 19, 2025	27.37	27.64	27.64	27.77	26.87	1.38M
September 18, 2025	27.09	27.44	27.44	27.7	26.9	458,903
September 17, 2025	27.13	26.98	26.98	27.9	26.57	920,934
September 16, 2025	27.3	27	27	27.51	26.87	497,900
September 15, 2025	28.07	27.27	27.27	28.39	27.23	422,800
September 12, 2025	28.86	28.06	28.06	28.86	27.91	273,671
September 11, 2025	28.36	28.68	28.68	28.89	28.36	422,300
September 10, 2025	29.18	28.4	28.4	29.26	28.34	309,841
September 09, 2025	29.26	29.33	29.33	29.43	28.99	379,400
September 08, 2025	29.3	29.26	29.26	29.41	28.49	385,700
September 05, 2025	29.08	29.42	29.42	29.78	28.98	414,943
September 04, 2025	29.39	29.19	29.19	29.59	28.88	553,530
September 03, 2025	30.49	29.39	29.39	31.1	29.29	567,057
September 02, 2025	30.86	30.81	30.81	31.26	30.44	414,800
August 29, 2025	30.21	30.62	30.62	30.81	30.18	290,925
August 28, 2025	30.5	30.26	30.26	30.56	29.86	316,721
August 27, 2025	30.1	30.49	30.49	30.95	30.1	326,146
August 26, 2025	29.98	30.34	30.34	30.8	29.93	408,475
August 25, 2025	30.53	29.83	29.83	30.55	29.47	374,400
August 22, 2025	29.98	30.5	30.5	30.9	29.98	494,915
August 21, 2025	29.57	29.66	29.66	30.42	29.43	491,400
August 20, 2025	30.21	29.62	29.62	30.39	29.42	434,200
August 19, 2025	29.93	30.33	30.33	30.99	29.85	527,820
August 18, 2025	29.83	29.76	29.76	30.65	29.58	433,187
August 15, 2025	30.21	29.83	29.83	30.63	29.82	652,000
August 14, 2025	30.03	30.21	30.21	30.63	29.64	464,400
August 13, 2025	30.44	30.48	30.48	31.23	30	1.02M
August 12, 2025	28.18	30.35	30.35	30.63	28.14	1.6M
August 11, 2025	24.73	27.36	27.36	27.41	24.69	1.82M
August 08, 2025	22.29	23.81	23.81	24.7	22.07	1.01M
August 07, 2025	21.15	21.62	21.62	21.74	20.7	705,613
August 06, 2025	21.42	20.82	20.82	21.68	20.79	414,600
August 05, 2025	21.44	21.44	21.44	21.57	21.18	389,000
August 04, 2025	21.19	21.4	21.4	21.43	20.88	463,700
August 01, 2025	20.86	21.21	21.21	21.25	20.39	440,200
July 31, 2025	21.06	20.95	20.95	21.33	20.77	545,003
July 30, 2025	21.7	21.34	21.34	21.84	21.23	304,733
July 29, 2025	22.1	21.67	21.67	22.13	21.65	359,000
July 28, 2025	22.37	22.24	22.24	22.9	22.06	457,600
July 25, 2025	22.46	22.37	22.37	22.5	22.13	329,130

Amphastar Pharmaceuticals, Inc. (AMPH) NASDAQ