NASDAQ: IONS
Ionis Pharmaceuticals Inc Stock

$55.07+0.58 (+1.06%)
Updated Aug 4, 2026
IONS Price
$55.07
Fair Value Price
N/A
Market Cap
$9.15B
52 Week Low
$40.03
52 Week High
$86.74
P/E
-15.82x
P/B
20.81x
P/S
15.01x
PEG
N/A
Dividend Yield
N/A
Revenue
$874.09M
Earnings
-$565.17M
Gross Margin
98.2%
Operating Margin
-54.06%
Profit Margin
-64.7%
Debt to Equity
5.81
Operating Cash Flow
-$496M
Beta
0.78
Next Earnings
N/A
Ex-Dividend
N/A
Next Dividend
N/A

IONS Overview

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.

Zen Rating

Our proven quant model uses 115 proprietary factors, including AI, to determine IONS's potential to beat the market

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  • Stocks with a Zen Rating of Sell (D) had an average loss of -6.47% per year. Learn More

Zen Rating Component Grades

B
Zen Rating uses advanced AI algorithms that detect subtle patterns in market data; it anticipates future trends that point to superior stock price results.

Industry: Biotech

Industry Rating
F
IONS
Ranked
#351 of 463

Top Ranked Stocks in Industry

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IONS News

Overview

Due Diligence Score

Industry Average (24)
You've viewed Due Diligence Score for 10/10 free stocks. Upgrade to Premium to see how IONS scored across 33 valuation, financial, forecast, performance, and dividend due diligence checks.

Due Diligence Checks

IONS is unprofitable, so we are unable to calculate its intrinsic value according to an updated version of Benjamin Graham's Formula from "The Intelligent Investor"
Below Benjamin Graham Formula Value Valuation
IONS is poor value based on its book value relative to its share price (20.81x), compared to the US Biotechnology industry average (5.28x)
P/B vs Industry Valuation
IONS is unprofitable, so we... subscribe to Premium to read more.
PEG Value Valuation
There are 30 more IONS due diligence checks available for Premium users.

Valuation

IONS price to earnings (PE)

For valuing profitable companies with steady earnings

Company
-15.82x
Industry
13.64x
Market
14.64x

IONS price to book (PB)

For valuing companies that are loss-making or have lots of physical asset

Company
20.81x
Industry
5.28x
IONS is poor value based... subscribe to Premium to read more.
P/B vs Industry Valuation

IONS's financial health

Profit margin

Revenue
$267.9M
Net Income
-$114.6M
Profit Margin
-42.8%
IONS's cash burn is expected... subscribe to Premium to read more.
Interest Coverage Financials
IONS's profit margin has decreased... subscribe to Premium to read more.
Profit Margin Growth Financials

Assets to liabilities

Assets
$3.0B
Liabilities
$2.6B
Debt to equity
5.81
IONS's short-term assets ($2.49B) exceed... subscribe to Premium to read more.
Short-term Liabilities Financials
IONS's short-term assets ($2.49B) exceed... subscribe to Premium to read more.
Long-term Liabilities Financials
IONS's debt has increased relative... subscribe to Premium to read more.
Shrinking Debt Financials
IONS's debt to equity ratio... subscribe to Premium to read more.
Healthy Debt to Equity Financials

Cash flow

Operating
$565.5M
Investing
$23.5M
Financing
-$412.3M
IONS's cash and short-term investments... subscribe to Premium to read more.
Debt Coverage Financials

IONS vs Biotech Stocks

TickerZen RatingMarket Cap1d %P/EP/B
IONSD$9.15B+1.06%-15.82x20.81x
SYREC$9.11B+10.54%-49.50x13.59x
CRNX$8.89B+0.12%-16.64x7.46x
PTGXA$8.73B+2.67%-75.03x13.32x
KRYSC$9.61B+3.90%39.27x7.07x

Ionis Pharmaceuticals Stock FAQ

What is Ionis Pharmaceuticals's quote symbol?

(NASDAQ: IONS) Ionis Pharmaceuticals trades on the NASDAQ under the ticker symbol IONS. Ionis Pharmaceuticals stock quotes can also be displayed as NASDAQ: IONS.

If you're new to stock investing, here's how to buy Ionis Pharmaceuticals stock.

What is the 52 week high and low for Ionis Pharmaceuticals (NASDAQ: IONS)?

(NASDAQ: IONS) Ionis Pharmaceuticals's 52-week high was $86.74, and its 52-week low was $40.03. It is currently -36.51% from its 52-week high and 37.57% from its 52-week low.

How much is Ionis Pharmaceuticals stock worth today?

(NASDAQ: IONS) Ionis Pharmaceuticals currently has 166,184,322 outstanding shares. With Ionis Pharmaceuticals stock trading at $55.07 per share, the total value of Ionis Pharmaceuticals stock (market capitalization) is $9.15B.

Ionis Pharmaceuticals stock was originally listed at a price of $12.31 in Dec 31, 1997. If you had invested in Ionis Pharmaceuticals stock at $12.31, your return over the last 28 years would have been 347.25%, for an annualized return of 5.5% (not including any dividends or dividend reinvestments).

How much is Ionis Pharmaceuticals's stock price per share?

(NASDAQ: IONS) Ionis Pharmaceuticals stock price per share is $55.07 today (as of Aug 4, 2026).

What is Ionis Pharmaceuticals's Market Cap?

(NASDAQ: IONS) Ionis Pharmaceuticals's market cap is $9.15B, as of Aug 6, 2026.

Market cap (market capitalization) is the total market value of a publicly traded company's outstanding shares.

Ionis Pharmaceuticals's market cap is calculated by multiplying IONS's current stock price of $55.07 by IONS's total outstanding shares of 166,184,322.
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