Ionis Pharmaceuticals, Inc. (IONS)

NASDAQ: IONS · Real-Time Price · USD

43.93

-1.82 (-3.98%)

At close: Sep 23, 2026, 4:00 PM EDT

44.35

+0.42 (0.96%)

After-hours: Sep 23, 2026, 5:25 PM EDT

Ionis Pharmaceuticals Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Sep 23, 2026	46.23	46.41	43.01	43.93	43.93	-3.98%	3,522,296
Sep 22, 2026	44.96	46.13	44.44	45.75	45.75	1.89%	4,091,932
Sep 21, 2026	44.95	45.25	44.20	44.90	44.90	1.04%	4,337,666
Sep 18, 2026	46.75	46.75	44.27	44.44	44.44	-4.94%	7,314,703
Sep 17, 2026	46.68	47.42	45.75	46.75	46.75	4.26%	4,018,342
Sep 16, 2026	47.38	47.59	44.66	44.84	44.84	-5.10%	7,624,741
Sep 15, 2026	51.37	51.37	46.72	47.25	47.25	-8.15%	6,745,808
Sep 14, 2026	54.88	55.50	51.31	51.44	51.44	-5.11%	5,767,494
Sep 11, 2026	55.94	56.16	54.16	54.21	54.21	-2.59%	2,153,677
Sep 10, 2026	55.75	55.77	54.91	55.65	55.65	-0.66%	2,938,267
Sep 9, 2026	56.38	56.96	55.70	56.02	56.02	-1.22%	2,998,625
Sep 8, 2026	52.15	57.43	52.15	56.71	56.71	-2.38%	9,175,667
Sep 4, 2026	58.36	58.96	57.78	58.09	58.09	-0.07%	2,671,092
Sep 3, 2026	60.42	60.42	57.47	58.13	58.13	-5.22%	4,347,907
Sep 2, 2026	60.25	61.77	59.78	61.33	61.33	2.42%	1,845,866
Sep 1, 2026	60.37	60.99	59.78	59.88	59.88	-0.80%	1,872,594
Aug 31, 2026	61.07	61.07	59.70	60.36	60.36	-1.13%	2,017,160
Aug 28, 2026	60.62	61.69	60.35	61.05	61.05	-2.21%	1,850,852
Aug 27, 2026	63.48	63.48	62.34	62.43	62.43	-1.47%	1,625,581
Aug 26, 2026	63.50	63.55	62.44	63.36	63.36	-0.33%	2,152,847
Aug 25, 2026	62.53	64.19	62.19	63.57	63.57	2.47%	2,435,239
Aug 24, 2026	60.54	62.07	59.70	62.04	62.04	3.85%	2,207,101
Aug 21, 2026	59.64	60.92	59.06	59.74	59.74	1.67%	2,723,906
Aug 20, 2026	60.03	60.41	58.60	58.76	58.76	-3.36%	2,124,846
Aug 19, 2026	60.11	61.36	59.61	60.80	60.80	1.98%	3,137,560
Aug 18, 2026	58.41	60.19	58.02	59.62	59.62	1.69%	3,192,640
Aug 17, 2026	57.11	58.74	56.41	58.63	58.63	2.43%	2,000,182
Aug 14, 2026	55.16	57.24	55.16	57.24	57.24	2.45%	1,353,737
Aug 13, 2026	56.50	56.81	55.56	55.87	55.87	-1.17%	1,220,460
Aug 12, 2026	55.01	57.07	54.91	56.53	56.53	2.00%	1,999,667
Aug 11, 2026	56.79	57.16	55.37	55.42	55.42	-2.67%	2,407,128
Aug 10, 2026	56.10	57.66	56.10	56.94	56.94	0.67%	2,399,897
Aug 7, 2026	54.73	56.60	54.40	56.56	56.56	3.80%	2,009,277
Aug 6, 2026	54.59	55.42	54.02	54.49	54.49	0.55%	2,592,317
Aug 5, 2026	55.17	55.36	53.58	54.19	54.19	-1.60%	2,122,267
Aug 4, 2026	54.85	55.22	53.87	55.07	55.07	1.06%	2,688,216
Aug 3, 2026	52.66	54.54	52.17	54.49	54.49	5.25%	3,212,858
Jul 31, 2026	53.33	53.33	51.28	51.77	51.77	-2.83%	2,570,536
Jul 30, 2026	53.92	54.04	52.65	53.28	53.28	-1.41%	2,875,352
Jul 29, 2026	55.09	55.36	53.50	54.04	54.04	-2.28%	3,129,432
Jul 28, 2026	56.56	56.56	54.00	55.30	55.30	-1.18%	2,805,274
Jul 27, 2026	56.93	57.09	55.79	55.96	55.96	-1.04%	2,584,895
Jul 24, 2026	56.32	57.36	56.19	56.55	56.55	1.22%	3,094,731
Jul 23, 2026	53.71	57.48	53.35	55.87	55.87	3.44%	3,834,344
Jul 22, 2026	51.16	54.06	50.01	54.01	54.01	1.16%	8,732,966
Jul 21, 2026	52.75	54.13	52.26	53.39	53.39	0.83%	3,074,069
Jul 20, 2026	54.47	54.80	52.82	52.95	52.95	-2.65%	2,167,064
Jul 17, 2026	54.10	54.69	53.76	54.39	54.39	-0.48%	2,572,809
Jul 16, 2026	53.95	55.98	53.38	54.65	54.65	-0.15%	3,805,259
Jul 15, 2026	54.48	54.89	53.51	54.73	54.73	-0.36%	3,577,545