IONS

Ionis Pharmaceuticals Inc

IONS.US ionis.com + Research + Basket
CIK 0000874015
Employees 1,480
Phone 760 931 9200
Fiscal year end December
IPO May 17, 1991
Address 2855 Gazelle Court, Carlsbad, CA, United States, 92010
45.00
+0.10 (+0.22%)
USD · NASDAQ
52-week range
42.08
86.74
Trading at 7% of the 52-week range
Market Cap
7.46B
P/E Ratio
0.00
Forward P/E
90.91
Book Value
2.66
Div. Yield
N/A
% Institutions
110.18%
% Insiders
0.595%

1 Year

-39.0%

3 Year

+2.0%

10 Year

+72.8%
Description

Ionis Pharmaceuticals, Inc., a commercial-stage biotechnology company, provides RNA-targeted medicines in the United States. The company offers TRYNGOLZA reduces triglyceride levels in adults with familial chylomicronemia syndrome (FCS) and acute pancreatitis; DAWNZERA for prophylaxis to prevent attacks of hereditary angioedema in adults; WAINUA for the treatment of the polyneuropathy of hereditary transthyretin-medicated amyloidosis (ATTRv-PN) in adults; and SPINRAZA for pediatric and adult patients with spinal muscular atrophy (SMA). It also provides QALSODY for the treatment of Amyotrophic Lateral Sclerosis (ALS); TEGSEDI for the treatment of ATTRv-PN in adults; and WAYLIVRA for treatment for FCS and familial partial lipodystrophy. It also develops products under Phase 3 clinical trials, such as Olezarsen for patients with hypertriglyceridemia (SHTG) and cardiovascular disease (CVD); and Zilganerse, a potential treatment for people with genetically confirmed Alexander disease, as well as ION582 which is in Phase 3 clinical trial for the potential treatment of AS, a rare genetic neurological disease. In addition, the company develops Eplontersen to degrade mutant and wild-type TTR mRNA through binding to the TTR mRNA; Pelacarsen to inhibit the production of apolipoprotein(a) in the liver to offer a direct approach for reducing lipoprotein(a); Bepirovirsen to inhibit the production of viral proteins associated with hepatitis B virus; Sefaxersen to reduce the production of complement factor B and lower activation of the alternative complement pathway; and Ulefnersen to reduce the production of the fused in sarcoma, as well as other mid-stage pipeline investigational medicines. It has a strategic collaboration with Biogen for the treatment of neurological disorders; and collaboration and license agreement with GSK, AstraZeneca, Novartis, and Roche, as well as with Metagenomi. The company was incorporated in 1989 and is headquartered in Carlsbad, California.

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People

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Directors & Officers

Name Title Year Born
Dr. Brett P. Monia Ph.D. Founder, CEO & Director 1961
Ms. Elizabeth L. Hougen M.A., M.B.A., M.S. Executive VP of Finance & CFO 1962
Mr. Patrick R. O'Neil Esq. Executive VP, Chief Legal Officer, General Counsel & Corporate Secretary 1974
Dr. Eric E. Swayze Ph.D. Executive Vice President & Head of Research 1966
Mr. Brian Birchler Executive Vice President of Corporate & Development Operations 1966
Dr. Richard S. Geary Ph.D. Strategic Consultant 1958
Dr. Eugene Schneider M.D. Executive VP, Chief Clinical Development & Operations Officer 1973
Mr. Darren Gonzales Chief Accounting Officer & Senior VP NA
Dr. C. Frank Bennett BSc, Ph.D. Executive VP & Chief Scientific Officer 1957
Mr. D. Wade Walke Ph.D. Senior Vice President of Investor Relations NA

Insider Trading

Open insider trading
Date Insider Name Title Transaction Type Shares Price Value SEC
Apr 16, 2026 Kyle Jenne N/A Sale 4.90K $75.17 $368.48K SEC
Apr 16, 2026 Brian Birchler N/A Sale 973.00 $75.04 $73.01K SEC
Apr 15, 2026 B Lynne Parshall N/A Sale 5.00K $76.27 $381.35K SEC
Apr 02, 2026 Shannon L Devers N/A Sale 6.19K $74.05 $458.59K SEC
Mar 19, 2026 Eugene Schneider N/A Sale 5.81K $70.97 $412.48K SEC
Mar 17, 2026 Elizabeth L Hougen N/A Sale 10.17K $73.21 $744.69K SEC
Mar 16, 2026 Elizabeth L Hougen N/A Sale 215.05K $72.40 $15.57M SEC
Mar 10, 2026 Brett P Monia N/A Sale 34.10K $75.92 $2.59M SEC
Mar 10, 2026 Kyle Jenne N/A Sale 37.28K $75.85 $2.83M SEC
Mar 09, 2026 Patrick R O'neil N/A Sale 10.15K $75.25 $763.64K SEC
Mar 09, 2026 Brett P Monia N/A Sale 126.67K $75.20 $9.53M SEC
Mar 03, 2026 Allene M Diaz N/A Sale 54.88K $79.35 $4.35M SEC
Mar 03, 2026 C Frank Bennett N/A Sale 85.09K $79.23 $6.74M SEC
Mar 03, 2026 Shannon L Devers N/A Sale 20.11K $79.40 $1.60M SEC
Feb 13, 2026 Eric Swayze N/A Sale 15.64K $81.76 $1.28M SEC
Feb 11, 2026 B Lynne Parshall N/A Sale 5.00K $82.72 $413.60K SEC
Feb 06, 2026 Brett P Monia N/A Sale 29.43K $85.79 $2.52M SEC
Feb 02, 2026 C Frank Bennett N/A Sale 85.09K $82.93 $7.06M SEC
Jan 30, 2026 Brett P Monia N/A Sale 62.97K $82.72 $5.21M SEC
Jan 30, 2026 Brian Birchler N/A Sale 6.18K $83.03 $513.04K SEC

Shareholders

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Institutional Holders

Holder Name Shares Date Reported % Out Value % Change
FMR Inc 24.63M Jun 30, 2026 14.82% $0.08 0.31%
Capital World Investors 21.67M Jun 30, 2026 13.04% $0.20 2.28%
BlackRock Inc 10.70M Jun 30, 2026 6.44% $0.01 2.51%
Vanguard Portfolio Management, LLC 7.86M Jun 30, 2026 4.73% $0.03 0.65%
Wellington Management Company LLP 7.65M Jun 30, 2026 4.60% $0.10 19.71%
Vanguard Capital Management, LLC 7.21M Jun 30, 2026 4.34% $0.01 1.31%
Two Sigma Investments LLC 6.25M Jun 30, 2026 3.76% $0.36 6.74%
Royal Bank of Canada 6.18M Jun 30, 2026 3.72% $0.07 62.62%
State Street Corp 4.33M Jun 30, 2026 2.61% $0.01 8.49%
T. Rowe Price Investment Management,Inc. 3.96M Jun 30, 2026 2.38% $0.21 -35.71%
Geode Capital Management, LLC 3.58M Jun 30, 2026 2.16% $0.02 -10.05%
T. Rowe Price Associates, Inc. 3.18M Jun 30, 2026 1.92% $0.03 5.26%
JPMorgan Chase & Co 2.67M Jun 30, 2026 1.61% $0.01 13.04%
Artisan Partners Limited Partnership 2.64M Jun 30, 2026 1.59% $0.33 28.26%
Tweedy, Browne Co LLC 2.28M Jun 30, 2026 1.37% $13.70 0.21%
Deep Track Capital, LP 2.20M Jun 30, 2026 1.32% $2.54 12.82%
The Goldman Sachs Group Inc 2.11M Jun 30, 2026 1.27% $0.01 24.13%
Baker Bros Advisors LP 2.05M Jun 30, 2026 1.23% $0.81 0.00%
Deerfield Management Co 1.98M Jun 30, 2026 1.19% $1.64 0.00%
American Century Companies Inc 1.95M Jun 30, 2026 1.17% $0.07 17.03%

Fund Holdings

Rank Holder Name Shares Held % of Shares Change Date Reported
1 Fidelity Growth Company Fund 8.50M 5.12% ▲ 0.00% Aug 31, 2026
2 American Funds Growth Fd of Amer A 7.67M 4.61% ▲ 0.00% Sep 30, 2026
3 Vanguard MStar Total Stk Mkt Idx Invest 5.01M 3.02% ▲ 0.29% Sep 30, 2026
4 American Funds New Economy A 4.87M 2.93% ▲ 0.00% Sep 30, 2026
5 Vanguard Health Care Inv 4.53M 2.73% ▲ 19.13% Jun 30, 2026
6 American Funds SMALLCAP World A 4.46M 2.68% ▼ 15.24% Sep 30, 2026
7 Vanguard Small Cap Index 3.55M 2.14% ▼ 1.70% Sep 30, 2026
8 State Street® SPDR® S&P® Biotech ETF 2.66M 1.60% ▼ 1.87% Sep 30, 2026
9 Fidelity Growth Company K6 2.39M 1.44% ▲ 0.00% Aug 31, 2026
10 Fidelity Series Growth Company 1.99M 1.20% ▲ 0.01% Aug 31, 2026

Financial Highlights

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Market Cap: $7.46B
EBITDA: $-579.48M
PEG Ratio: $25.70
Book Value: $2.66
Earnings/Share: $-3.48
Profit Margin: -64.66%
Operating Margin: -38.18%
ROA (TTM): -12.43%
ROE (TTM): -105.50%
Revenue (TTM): $874.09M
Revenue/Share (TTM): $5.36
Earnings Growth (YOY): -43.70%
Revenue Growth (YOY): -40.70%

Valuation Metrics

Enterprise Value: $6.86B
Trailing P/E: 0.00
Forward P/E: 90.91

Shares Statistics

Shares Outstanding: 166.18M
Shares Float: 164.82M
% Insiders: 0.595%
% Institutions: 110.18%
Shares Short: 20.65M
Shares Short (Prior Month): 22.51M
Short Ratio: 5.20
Short % Float: 16.46%

Stock Price History

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1 Year Price History

3 Years Price History

10 Years Price History

Max Price History

Financial Charts

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Open balance sheet Open capital intensity Download Financials (Excel)

Revenue, Net Income & Operating Cash Flow (Yearly)

Change % vs Prior Year

Revenue, Net Income & Operating Cash Flow (Quarterly)

Change % vs Prior Quarter

Operating Expenses (Yearly)

Operating Expenses (Quarterly)

Balance Sheet (Yearly)

Balance Sheet (Quarterly)

Assets Breakdown (Yearly)

Assets Breakdown (Quarterly)

Liabilities Breakdown (Yearly)

Liabilities Breakdown (Quarterly)

Income Statement Waterfall

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Open full waterfall Open balance sheet
Line Item
Step Type
Value
Revenue
adjust
$944.00M
Cost of Goods Sold
adjust
$-16.00M
Gross Profit
subtotal
$928.00M
SG&A
adjust
$-393.90M
R&D
adjust
$-916.00M
Other Operating Expense
adjust
$-100.00K
Operating Income
subtotal
$-382.00M
Other / Non-Operating Items
adjust
$1.00M
Net Income
subtotal
$-381.00M

Earnings Per Share (EPS) History

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Financial Ratios

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📦 Raw API Data (JSON Explorer)

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