Ionis Pharmaceuticals, Inc. discovers and develops RNA-targeted therapeutics in the United States. The company offers SPINRAZA for spinal muscular atrophy (SMA) in pediatric and adult patients; TEGSEDI, an injection for the treatment of polyneuropathy of hereditary transthyretin-mediated amyloidosis in adults; and WAYLIVRA, a treatment for familial chylomicronemia syndrome and familial partial lipodystrophy. It also develops medicines for various indications that are in phase 3 study, including Eplontersen as a monthly self-administered subcutaneous injection to treat all types of TTR amyloidosis; Olezarsen for patients with severe hypertriglyceridemia (SHTG); Donidalorsen for patients with hereditary angioedema; ION363 for patients with amyotrophic lateral sclerosis; Pelacarsen for patients with established cardiovascular disease and elevated lipoprotein(a); and Tofersen to inhibit the production of superoxide dismutase 1. In addition, the company develops medicines for metabolic diseases, infectious diseases, renal diseases, ophthalmic diseases, and cancer. It has a strategic collaboration with Biogen Inc.; and collaboration and license agreement with AstraZeneca, Bayer AG, GlaxoSmithKline plc, Novartis AG, Roche, Janssen Biotech, Inc., and Flamingo Therapeutics, Inc. Ionis Pharmaceuticals, Inc. was founded in 1989 and is based in Carlsbad, California.
The current price of ISI.STU is €63.56 EUR — it has decreased by -2.81% in the past 24 hours. Watch Ionis Pharmaceuticals stock price performance more closely on the chart.
What is Ionis Pharmaceuticals stock ticker?▼
Depending on the exchange, the stock ticker may vary. For instance, on exchange Ionis Pharmaceuticals stocks are traded under the ticker ISI.STU.
Is Ionis Pharmaceuticals stock price growing?▼
ISI.STU stock has fallen by -1.85% compared to the previous week, the month change is a -2.28% fall, over the last year Ionis Pharmaceuticals has showed a +153.15% increase.
How many employees does Ionis Pharmaceuticals have?▼
As of April 10, 2026, the company has 660 employees.
In which sector is Ionis Pharmaceuticals located?▼
Ionis Pharmaceuticals operates in the Healthcare sector.
When did Ionis Pharmaceuticals complete a stock split?▼
Ionis Pharmaceuticals has not had any recent stock splits.
Where is Ionis Pharmaceuticals headquartered?▼
Ionis Pharmaceuticals is headquartered in Carlsbad, United States.