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Also trades as: 0JDI.L (LSE) · $vol 0M

IONS NASDAQ

Ionis Pharmaceuticals, Inc.
1W: -2.2% 1M: -2.4% 3M: -21.5% YTD: -45.5% 1Y: -39.3% 3Y: -6.7% 5Y: +43.5%
$43.96
+0.54 (+1.24%)
After Hours: $44.17 (+0.21, +0.49%)
Weekly Expected Move ±5.4%
$38 $41 $43 $45 $48
NASDAQ · Healthcare · Biotechnology · Tech Score Sell · Power 37 · $7.2B mcap · 163M float · 2.11% daily turnover · Short 39% of daily vol
Credit Risk of going bust: higher than 52% of companies Debt: 25.1% of company value Bonds: $115.2M held by 65 funds → details ▾
Of US companies ranked in the middle of the pack, about 1 in 580 filed for bankruptcy within a year (2020-2025).
If the stock fell to about $1.24 (down 97%), Ionis Pharmaceuticals, Inc. would be worth roughly what it owes.
Total debt $2.42B against a stock market value of $7.22B.
Distance to default 4.94 (Merton model): prices to 2026-10-26, balance sheet 2026-06-30, debt counted $1.20B (short-term plus half of long-term), stock volatility 44.8%; Altman Z'' 1.30. A ranking and a back-test, not a forecast.
Bond figures are fund-reported marks (SEC N-PORT) as of Jul 2026. How these are computed.
Smart Money Score
Bullish 75
Insider+$1.1M
Congress—
ETF Holdings—
Key Statistics
Market Cap$7.2B
52W Range42.08-86.74
Volume3,197,333
Avg Volume3,442,995
Beta0.38
Dividend—
Analyst Ratings
21 Buy 12 Hold 0 Sell
Consensus Buy
Company Info
CEOBrett Monia
Employees1,480
SectorHealthcare
IndustryBiotechnology
IPO Date1991-05-17
Websiteionis.com
2855 Gazelle Court
Carlsbad, CA 92010
US
760 931 9200
About Ionis Pharmaceuticals, Inc.

Founded in 1989 and headquartered in Carlsbad, California, Ionis Pharmaceuticals, Inc. is a biopharmaceutical company specializing in the discovery and development of RNA-targeted therapies within the United States. Its commercial portfolio includes three key medications: SPINRAZA, prescribed for spinal muscular atrophy (SMA) in both children and adults; TEGSEDI, an injectable treatment targeting polyneuropathy associated with hereditary transthyretin-mediated amyloidosis in adult patients; and WAYLIVRA, which addresses familial chylomicronemia syndrome and familial partial lipodystrophy. Ionis also maintains a robust pipeline, with several drug candidates currently in Phase 3 clinical trials. These include Eplontersen, a monthly self-administered subcutaneous injection designed for all forms of TTR amyloidosis; Olezarsen, intended for individuals with severe hypertriglyceridemia (SHTG); Donidalorsen, for patients suffering from hereditary angioedema; ION363, aimed at amyotrophic lateral sclerosis (ALS); Pelacarsen, developed for those with established cardiovascular disease and elevated lipoprotein(a); and Tofersen, which works by inhibiting the production of superoxide dismutase 1. Beyond these late-stage assets, the company is actively researching treatments for metabolic, infectious, renal, and ophthalmic diseases, as well as various types of cancer. The firm engages in significant collaborations, notably a strategic partnership with Biogen Inc. Additionally, it holds licensing and collaboration agreements with AstraZeneca, Bayer AG, GlaxoSmithKline plc, Novartis AG, Roche, Janssen Biotech, Inc., and Flamingo Therapeutics, Inc.

Recent Insider Trades

NameTypeSharesPriceDate
Swayze Eric S-Sale 53 $43.54 2026-10-16
Devers Shannon L. S-Sale 1,357 $43.54 2026-10-16
Swayze Eric M-Exempt 125 — 2026-10-15
Swayze Eric M-Exempt 125 — 2026-10-15
Devers Shannon L. M-Exempt 2,820 — 2026-10-15

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For informational purposes only. Not investment advice. Data sourced from SEC filings. Privacy Terms